diff --git a/tcp_tests/templates/ironic_standalone/underlay--user-data-ironic.yaml b/tcp_tests/templates/ironic_standalone/underlay--user-data-ironic.yaml
index f35127d..377713c 100644
--- a/tcp_tests/templates/ironic_standalone/underlay--user-data-ironic.yaml
+++ b/tcp_tests/templates/ironic_standalone/underlay--user-data-ironic.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -101,38 +103,6 @@
           auto ens4
           iface ens4 inet manual
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/mcp-fuel-aio/underlay--user-data-cfg01.yaml b/tcp_tests/templates/mcp-fuel-aio/underlay--user-data-cfg01.yaml
index 443e50c..6634617 100644
--- a/tcp_tests/templates/mcp-fuel-aio/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/mcp-fuel-aio/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -55,38 +57,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/mcp-fuel-aio/underlay--user-data1604.yaml b/tcp_tests/templates/mcp-fuel-aio/underlay--user-data1604.yaml
index 1013571..ad2c39b 100644
--- a/tcp_tests/templates/mcp-fuel-aio/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/mcp-fuel-aio/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/mk22-lab-advanced/underlay--user-data-cfg01.yaml b/tcp_tests/templates/mk22-lab-advanced/underlay--user-data-cfg01.yaml
index c90e6ad..6634617 100644
--- a/tcp_tests/templates/mk22-lab-advanced/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/mk22-lab-advanced/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -55,38 +57,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEpAIBAAKCAQEAxsI1JWJ/VLJlpgBkrhANrCAmne1qsYLCUdBynDG28YtLZ/eo
-         eAqtohmJs5SePHoC5uUeacclpxby+G/9s2/pCkzwjMEXPZ7+8RBqLBBTUBKEg3fo
-         GLtgjtHYEtm1/+5tg15s74aj48VkFF17G9DmAEta/RLOuRRPMuKy2noM/Fd+cXx+
-         OW0wgNFvFUioduuF7Rs9doWnKrLbRP1L8oyU2Xvv11fsSct1gFsXvCfzLltVam6j
-         XsE5qUxPyyVPIuqRuJrFOvsB/fVL7BgDikDnbsp1Bylht1WYOWAo6W21f7f6X1v7
-         xwd2944on0JjYbpcohvwjZ0kOQWobVf+6j7GLQIDAQABAoIBAF0tAAMlmLGY7CQU
-         /R3IctBlRhU1DpZmyTfXc1MbzzqO5Wu44yZbQyjBthcUrdWGEUQy1r4Z2OHq1T54
-         KcPry6DDjuU9Q+rkVXmnC07a3GOmOq7zEEA/3zU01ImJvFNdb8NtCb6ELOKDT7Zo
-         WGUi2h/7M41+OqDzD2m4csYO/3Vvr12sMhn9BfwU4OPpL44A4PJiEryEAw9o5/j/
-         73eyPvgf6tkC4l0mMtfHB9tg/F++iH8fiEr1SMvHGIc9gZNmFYMrs2XfLkAejPfH
-         XrOyw6eqd+kluqw51gHhdeQYwBx6mfOkbhPHWU79FzpH5M1ikdfImZmPCxVf3Ykj
-         nxLoK9UCgYEA4c9agPb/OFyN00nnUMBxzQt1pErpOf/7QhnvNZThomzSV7PyefxF
-         H6G/VlS3gCcrWBCh7mqOSxGcNQwgudVqzUm7QXruQeg4nWcCGSxg7lGYSEf0MyWL
-         5wrd+f9MoV/VV8udIPENjp96o5kwQEVRfsTBNwmk54kup2+br5q8re8CgYEA4VT8
-         UeIN+plP6FjZYITI+SO/ou5goKIhfBrqa5gOXXPc2y6sIu9wBWCr+T7FAF/2gGhS
-         rpVx76zcmx05nwkxIlJh58+G3MVyUDFoWnrtL38vdkBSuOGgNfzcBsFpQvFs8WaW
-         otbuTtkPcXbVdYRr32/C620MxXhUO+svo3CLaaMCgYEA1rjlF8NHl+Gy31rkQg5t
-         aIxgFpVBR+zZkNa2d94V3Ozb65fqmALB/D1Dg6VVROB6P+i5AsyCeHHLd0oMCIof
-         YAyfqrlpvHRE+bAM98ESfyxJwVnipYwrh8z2nZYd2UoWxcCRrtRpjtipts2ha0w/
-         HWudS2e5To5NNdxUT9y1VDMCgYEAxkQiE+ZkyGiXv+hVtLCBqX4EA9fdm9msvudr
-         9qn/kcj9vrntanvlxEWQbCoH61GEsu2YOtdyPiKKpc1sQvwyiHGWhgK7NoxhDiC7
-         IknhYxZ064ajgtu8PWS1MRiDhwypACt1Rej6HNSu2vZl0hZnWF2dU8tLHoHHFEXX
-         T+caNCMCgYBZpD6XBiiEXf0ikXYnXKOmbsyVG80V+yqfLo85qb2RW9TaviOSP43g
-         nB22ReMSHq2cOrs6VTTgfhxefBwzdDFbfKMf6ZU82jCNlpetAZOrhdMHUvcsjSQk
-         XKI6Ldfq6TU3xKujRHfGP+oQ6GLwVCL/kjGxOuSRLFGfRiiqYI3nww==
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/mk22-lab-advanced/underlay--user-data1404.yaml b/tcp_tests/templates/mk22-lab-advanced/underlay--user-data1404.yaml
index b337f0c..5a16378 100644
--- a/tcp_tests/templates/mk22-lab-advanced/underlay--user-data1404.yaml
+++ b/tcp_tests/templates/mk22-lab-advanced/underlay--user-data1404.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/mk22-lab-advanced/underlay--user-data1604.yaml b/tcp_tests/templates/mk22-lab-advanced/underlay--user-data1604.yaml
index bf1ea31..a023203 100644
--- a/tcp_tests/templates/mk22-lab-advanced/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/mk22-lab-advanced/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/mk22-lab-basic/underlay--user-data-cfg01.yaml b/tcp_tests/templates/mk22-lab-basic/underlay--user-data-cfg01.yaml
index c90e6ad..6634617 100644
--- a/tcp_tests/templates/mk22-lab-basic/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/mk22-lab-basic/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -55,38 +57,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEpAIBAAKCAQEAxsI1JWJ/VLJlpgBkrhANrCAmne1qsYLCUdBynDG28YtLZ/eo
-         eAqtohmJs5SePHoC5uUeacclpxby+G/9s2/pCkzwjMEXPZ7+8RBqLBBTUBKEg3fo
-         GLtgjtHYEtm1/+5tg15s74aj48VkFF17G9DmAEta/RLOuRRPMuKy2noM/Fd+cXx+
-         OW0wgNFvFUioduuF7Rs9doWnKrLbRP1L8oyU2Xvv11fsSct1gFsXvCfzLltVam6j
-         XsE5qUxPyyVPIuqRuJrFOvsB/fVL7BgDikDnbsp1Bylht1WYOWAo6W21f7f6X1v7
-         xwd2944on0JjYbpcohvwjZ0kOQWobVf+6j7GLQIDAQABAoIBAF0tAAMlmLGY7CQU
-         /R3IctBlRhU1DpZmyTfXc1MbzzqO5Wu44yZbQyjBthcUrdWGEUQy1r4Z2OHq1T54
-         KcPry6DDjuU9Q+rkVXmnC07a3GOmOq7zEEA/3zU01ImJvFNdb8NtCb6ELOKDT7Zo
-         WGUi2h/7M41+OqDzD2m4csYO/3Vvr12sMhn9BfwU4OPpL44A4PJiEryEAw9o5/j/
-         73eyPvgf6tkC4l0mMtfHB9tg/F++iH8fiEr1SMvHGIc9gZNmFYMrs2XfLkAejPfH
-         XrOyw6eqd+kluqw51gHhdeQYwBx6mfOkbhPHWU79FzpH5M1ikdfImZmPCxVf3Ykj
-         nxLoK9UCgYEA4c9agPb/OFyN00nnUMBxzQt1pErpOf/7QhnvNZThomzSV7PyefxF
-         H6G/VlS3gCcrWBCh7mqOSxGcNQwgudVqzUm7QXruQeg4nWcCGSxg7lGYSEf0MyWL
-         5wrd+f9MoV/VV8udIPENjp96o5kwQEVRfsTBNwmk54kup2+br5q8re8CgYEA4VT8
-         UeIN+plP6FjZYITI+SO/ou5goKIhfBrqa5gOXXPc2y6sIu9wBWCr+T7FAF/2gGhS
-         rpVx76zcmx05nwkxIlJh58+G3MVyUDFoWnrtL38vdkBSuOGgNfzcBsFpQvFs8WaW
-         otbuTtkPcXbVdYRr32/C620MxXhUO+svo3CLaaMCgYEA1rjlF8NHl+Gy31rkQg5t
-         aIxgFpVBR+zZkNa2d94V3Ozb65fqmALB/D1Dg6VVROB6P+i5AsyCeHHLd0oMCIof
-         YAyfqrlpvHRE+bAM98ESfyxJwVnipYwrh8z2nZYd2UoWxcCRrtRpjtipts2ha0w/
-         HWudS2e5To5NNdxUT9y1VDMCgYEAxkQiE+ZkyGiXv+hVtLCBqX4EA9fdm9msvudr
-         9qn/kcj9vrntanvlxEWQbCoH61GEsu2YOtdyPiKKpc1sQvwyiHGWhgK7NoxhDiC7
-         IknhYxZ064ajgtu8PWS1MRiDhwypACt1Rej6HNSu2vZl0hZnWF2dU8tLHoHHFEXX
-         T+caNCMCgYBZpD6XBiiEXf0ikXYnXKOmbsyVG80V+yqfLo85qb2RW9TaviOSP43g
-         nB22ReMSHq2cOrs6VTTgfhxefBwzdDFbfKMf6ZU82jCNlpetAZOrhdMHUvcsjSQk
-         XKI6Ldfq6TU3xKujRHfGP+oQ6GLwVCL/kjGxOuSRLFGfRiiqYI3nww==
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/mk22-lab-basic/underlay--user-data1404.yaml b/tcp_tests/templates/mk22-lab-basic/underlay--user-data1404.yaml
index faadbb5..60c33c8 100644
--- a/tcp_tests/templates/mk22-lab-basic/underlay--user-data1404.yaml
+++ b/tcp_tests/templates/mk22-lab-basic/underlay--user-data1404.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/mk22-lab-basic/underlay--user-data1604.yaml b/tcp_tests/templates/mk22-lab-basic/underlay--user-data1604.yaml
index ff6539a..b1c2dc0 100644
--- a/tcp_tests/templates/mk22-lab-basic/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/mk22-lab-basic/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/mk22-lab-dvr/underlay--user-data-cfg01.yaml b/tcp_tests/templates/mk22-lab-dvr/underlay--user-data-cfg01.yaml
index 443e50c..6634617 100644
--- a/tcp_tests/templates/mk22-lab-dvr/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/mk22-lab-dvr/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -55,38 +57,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/mk22-lab-dvr/underlay--user-data1404.yaml b/tcp_tests/templates/mk22-lab-dvr/underlay--user-data1404.yaml
index e88634a..e3a67d8 100644
--- a/tcp_tests/templates/mk22-lab-dvr/underlay--user-data1404.yaml
+++ b/tcp_tests/templates/mk22-lab-dvr/underlay--user-data1404.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/mk22-lab-dvr/underlay--user-data1604.yaml b/tcp_tests/templates/mk22-lab-dvr/underlay--user-data1604.yaml
index 62e6372..09dc3df 100644
--- a/tcp_tests/templates/mk22-lab-dvr/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/mk22-lab-dvr/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/mk22-lab-ovs/underlay--user-data-cfg01.yaml b/tcp_tests/templates/mk22-lab-ovs/underlay--user-data-cfg01.yaml
index 443e50c..6634617 100644
--- a/tcp_tests/templates/mk22-lab-ovs/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/mk22-lab-ovs/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -55,38 +57,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/mk22-lab-ovs/underlay--user-data1404.yaml b/tcp_tests/templates/mk22-lab-ovs/underlay--user-data1404.yaml
index e88634a..e3a67d8 100644
--- a/tcp_tests/templates/mk22-lab-ovs/underlay--user-data1404.yaml
+++ b/tcp_tests/templates/mk22-lab-ovs/underlay--user-data1404.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/mk22-lab-ovs/underlay--user-data1604.yaml b/tcp_tests/templates/mk22-lab-ovs/underlay--user-data1604.yaml
index 62e6372..09dc3df 100644
--- a/tcp_tests/templates/mk22-lab-ovs/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/mk22-lab-ovs/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/mk22-qa-lab01/underlay--user-data-cfg01.yaml b/tcp_tests/templates/mk22-qa-lab01/underlay--user-data-cfg01.yaml
index c90e6ad..6634617 100644
--- a/tcp_tests/templates/mk22-qa-lab01/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/mk22-qa-lab01/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -55,38 +57,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEpAIBAAKCAQEAxsI1JWJ/VLJlpgBkrhANrCAmne1qsYLCUdBynDG28YtLZ/eo
-         eAqtohmJs5SePHoC5uUeacclpxby+G/9s2/pCkzwjMEXPZ7+8RBqLBBTUBKEg3fo
-         GLtgjtHYEtm1/+5tg15s74aj48VkFF17G9DmAEta/RLOuRRPMuKy2noM/Fd+cXx+
-         OW0wgNFvFUioduuF7Rs9doWnKrLbRP1L8oyU2Xvv11fsSct1gFsXvCfzLltVam6j
-         XsE5qUxPyyVPIuqRuJrFOvsB/fVL7BgDikDnbsp1Bylht1WYOWAo6W21f7f6X1v7
-         xwd2944on0JjYbpcohvwjZ0kOQWobVf+6j7GLQIDAQABAoIBAF0tAAMlmLGY7CQU
-         /R3IctBlRhU1DpZmyTfXc1MbzzqO5Wu44yZbQyjBthcUrdWGEUQy1r4Z2OHq1T54
-         KcPry6DDjuU9Q+rkVXmnC07a3GOmOq7zEEA/3zU01ImJvFNdb8NtCb6ELOKDT7Zo
-         WGUi2h/7M41+OqDzD2m4csYO/3Vvr12sMhn9BfwU4OPpL44A4PJiEryEAw9o5/j/
-         73eyPvgf6tkC4l0mMtfHB9tg/F++iH8fiEr1SMvHGIc9gZNmFYMrs2XfLkAejPfH
-         XrOyw6eqd+kluqw51gHhdeQYwBx6mfOkbhPHWU79FzpH5M1ikdfImZmPCxVf3Ykj
-         nxLoK9UCgYEA4c9agPb/OFyN00nnUMBxzQt1pErpOf/7QhnvNZThomzSV7PyefxF
-         H6G/VlS3gCcrWBCh7mqOSxGcNQwgudVqzUm7QXruQeg4nWcCGSxg7lGYSEf0MyWL
-         5wrd+f9MoV/VV8udIPENjp96o5kwQEVRfsTBNwmk54kup2+br5q8re8CgYEA4VT8
-         UeIN+plP6FjZYITI+SO/ou5goKIhfBrqa5gOXXPc2y6sIu9wBWCr+T7FAF/2gGhS
-         rpVx76zcmx05nwkxIlJh58+G3MVyUDFoWnrtL38vdkBSuOGgNfzcBsFpQvFs8WaW
-         otbuTtkPcXbVdYRr32/C620MxXhUO+svo3CLaaMCgYEA1rjlF8NHl+Gy31rkQg5t
-         aIxgFpVBR+zZkNa2d94V3Ozb65fqmALB/D1Dg6VVROB6P+i5AsyCeHHLd0oMCIof
-         YAyfqrlpvHRE+bAM98ESfyxJwVnipYwrh8z2nZYd2UoWxcCRrtRpjtipts2ha0w/
-         HWudS2e5To5NNdxUT9y1VDMCgYEAxkQiE+ZkyGiXv+hVtLCBqX4EA9fdm9msvudr
-         9qn/kcj9vrntanvlxEWQbCoH61GEsu2YOtdyPiKKpc1sQvwyiHGWhgK7NoxhDiC7
-         IknhYxZ064ajgtu8PWS1MRiDhwypACt1Rej6HNSu2vZl0hZnWF2dU8tLHoHHFEXX
-         T+caNCMCgYBZpD6XBiiEXf0ikXYnXKOmbsyVG80V+yqfLo85qb2RW9TaviOSP43g
-         nB22ReMSHq2cOrs6VTTgfhxefBwzdDFbfKMf6ZU82jCNlpetAZOrhdMHUvcsjSQk
-         XKI6Ldfq6TU3xKujRHfGP+oQ6GLwVCL/kjGxOuSRLFGfRiiqYI3nww==
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/mk22-qa-lab01/underlay--user-data1404.yaml b/tcp_tests/templates/mk22-qa-lab01/underlay--user-data1404.yaml
index e88634a..e3a67d8 100644
--- a/tcp_tests/templates/mk22-qa-lab01/underlay--user-data1404.yaml
+++ b/tcp_tests/templates/mk22-qa-lab01/underlay--user-data1404.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/mk22-qa-lab01/underlay--user-data1604.yaml b/tcp_tests/templates/mk22-qa-lab01/underlay--user-data1604.yaml
index 62e6372..09dc3df 100644
--- a/tcp_tests/templates/mk22-qa-lab01/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/mk22-qa-lab01/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/mk24_lab_ovs_dvr_vlan_bm/underlay--user-data-cfg01.yaml b/tcp_tests/templates/mk24_lab_ovs_dvr_vlan_bm/underlay--user-data-cfg01.yaml
index f2cf8ca..4970e34 100644
--- a/tcp_tests/templates/mk24_lab_ovs_dvr_vlan_bm/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/mk24_lab_ovs_dvr_vlan_bm/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -76,38 +78,6 @@
           auto enp8s0f1
           iface enp8s0f1 inet manual
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/mk24_lab_ovs_dvr_vlan_bm/underlay--user-data1604.yaml b/tcp_tests/templates/mk24_lab_ovs_dvr_vlan_bm/underlay--user-data1604.yaml
index dd6c909..ced5902 100644
--- a/tcp_tests/templates/mk24_lab_ovs_dvr_vlan_bm/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/mk24_lab_ovs_dvr_vlan_bm/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/physical_mcp11_dvr/underlay--user-data-cfg01.yaml b/tcp_tests/templates/physical_mcp11_dvr/underlay--user-data-cfg01.yaml
index 09d56f0..c68be66 100644
--- a/tcp_tests/templates/physical_mcp11_dvr/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/physical_mcp11_dvr/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -72,38 +74,6 @@
           auto eth0
           iface eth0 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/physical_mcp11_dvr/underlay--user-data1604.yaml b/tcp_tests/templates/physical_mcp11_dvr/underlay--user-data1604.yaml
index 4ad2d8d..1072d30 100644
--- a/tcp_tests/templates/physical_mcp11_dvr/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/physical_mcp11_dvr/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data-cfg01.yaml b/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data-cfg01.yaml
index 8056dce..d679f7b 100644
--- a/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -75,38 +77,6 @@
           auto eth0
           iface eth0 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data.yaml b/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data.yaml
index 70fc76d..e6f8351 100644
--- a/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data.yaml
+++ b/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay--user-data-cfg01.yaml
index 479fd38..2d0a8b6 100644
--- a/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -76,38 +78,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay--user-data1604.yaml
index 22b9d19..4d0ae3e 100644
--- a/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp-ocata-dvr/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp-ocata-ovs/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp-ocata-ovs/underlay--user-data-cfg01.yaml
index 479fd38..2d0a8b6 100644
--- a/tcp_tests/templates/virtual-mcp-ocata-ovs/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp-ocata-ovs/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -76,38 +78,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp-ocata-ovs/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp-ocata-ovs/underlay--user-data1604.yaml
index 22b9d19..4d0ae3e 100644
--- a/tcp_tests/templates/virtual-mcp-ocata-ovs/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp-ocata-ovs/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data-cfg01.yaml
index 437381b..f801421 100644
--- a/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -75,38 +77,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data1404.yaml b/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data1404.yaml
index aab8699..f93644d 100644
--- a/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data1404.yaml
+++ b/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data1404.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data1604.yaml
index f521d96..3eceaf4 100644
--- a/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp10-contrail/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data-cfg01.yaml
index 443e50c..6634617 100644
--- a/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -55,38 +57,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data1404.yaml b/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data1404.yaml
index d139bb1..b0b0daf 100644
--- a/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data1404.yaml
+++ b/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data1404.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data1604.yaml
index 1013571..ad2c39b 100644
--- a/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp10-dvr/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data-cfg01.yaml
index 443e50c..6634617 100644
--- a/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -55,38 +57,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data1404.yaml b/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data1404.yaml
index d139bb1..b0b0daf 100644
--- a/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data1404.yaml
+++ b/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data1404.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data1604.yaml
index 1013571..ad2c39b 100644
--- a/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp10-ovs.new/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data-cfg01.yaml
index 443e50c..6634617 100644
--- a/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -55,38 +57,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data1404.yaml b/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data1404.yaml
index d139bb1..b0b0daf 100644
--- a/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data1404.yaml
+++ b/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data1404.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data1604.yaml
index 1013571..ad2c39b 100644
--- a/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp10-ovs/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp11-dvr/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp11-dvr/underlay--user-data-cfg01.yaml
index 479fd38..2d0a8b6 100644
--- a/tcp_tests/templates/virtual-mcp11-dvr/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp11-dvr/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -76,38 +78,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp11-dvr/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp11-dvr/underlay--user-data1604.yaml
index 22b9d19..4d0ae3e 100644
--- a/tcp_tests/templates/virtual-mcp11-dvr/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp11-dvr/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp11-k8s-calico-minimal/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp11-k8s-calico-minimal/underlay--user-data-cfg01.yaml
index bcd93e7..4353465 100644
--- a/tcp_tests/templates/virtual-mcp11-k8s-calico-minimal/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp11-k8s-calico-minimal/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -75,38 +77,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp11-k8s-calico-minimal/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp11-k8s-calico-minimal/underlay--user-data1604.yaml
index 757fb84..1968a14 100644
--- a/tcp_tests/templates/virtual-mcp11-k8s-calico-minimal/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp11-k8s-calico-minimal/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay--user-data-cfg01.yaml
index bcd93e7..4353465 100644
--- a/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -75,38 +77,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay--user-data1604.yaml
index 757fb84..1968a14 100644
--- a/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp11-k8s-calico/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data-cfg01.yaml
index ee94ee0..a12b4a7 100644
--- a/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -79,38 +81,6 @@
           auto ens5
           iface ens5 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data1404.yaml b/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data1404.yaml
index 6445e9c..4d58d10 100644
--- a/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data1404.yaml
+++ b/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data1404.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data1604.yaml
index df6944a..09b0b85 100644
--- a/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp11-k8s-contrail/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp11-ovs-dpdk/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp11-ovs-dpdk/underlay--user-data-cfg01.yaml
index 479fd38..2d0a8b6 100644
--- a/tcp_tests/templates/virtual-mcp11-ovs-dpdk/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp11-ovs-dpdk/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -76,38 +78,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp11-ovs-dpdk/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp11-ovs-dpdk/underlay--user-data1604.yaml
index 5fd85c0..427a5fe 100644
--- a/tcp_tests/templates/virtual-mcp11-ovs-dpdk/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp11-ovs-dpdk/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp11-ovs.new/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp11-ovs.new/underlay--user-data-cfg01.yaml
index 479fd38..2d0a8b6 100644
--- a/tcp_tests/templates/virtual-mcp11-ovs.new/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp11-ovs.new/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -76,38 +78,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp11-ovs.new/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp11-ovs.new/underlay--user-data1604.yaml
index 05ebd66..34c379f 100644
--- a/tcp_tests/templates/virtual-mcp11-ovs.new/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp11-ovs.new/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
diff --git a/tcp_tests/templates/virtual-mcp11-ovs/underlay--user-data-cfg01.yaml b/tcp_tests/templates/virtual-mcp11-ovs/underlay--user-data-cfg01.yaml
index 479fd38..2d0a8b6 100644
--- a/tcp_tests/templates/virtual-mcp11-ovs/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/virtual-mcp11-ovs/underlay--user-data-cfg01.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCp0evjOaK8c8SKYK4r2+0BN7g+8YSvQ2n8nFgOURCyvkJqOHi1qPGZmuN0CclYVdVuZiXbWw3VxRbSW3EH736VzgY1U0JmoTiSamzLHaWsXvEIW8VCi7boli539QJP0ikJiBaNAgZILyCrVPN+A6mfqtacs1KXdZ0zlMq1BPtFciR1JTCRcVs5vP2Wwz5QtY2jMIh3aiwkePjMTQPcfmh1TkOlxYu5IbQyZ3G1ahA0mNKI9a0dtF282av/F6pwB/N1R1nEZ/9VtcN2I1mf1NW/tTHEEcTzXYo1R/8K9vlqAN8QvvGLZtZduGviNVNoNWvoxaXxDt8CPv2B2NCdQFZp
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd:
@@ -76,38 +78,6 @@
           auto ens4
           iface ens4 inet dhcp
 
-   - path: /root/.ssh/id_rsa
-     owner: root:root
-     permissions: '0600'
-     content: |
-         -----BEGIN RSA PRIVATE KEY-----
-         MIIEogIBAAKCAQEAqdHr4zmivHPEimCuK9vtATe4PvGEr0Np/JxYDlEQsr5Cajh4
-         tajxmZrjdAnJWFXVbmYl21sN1cUW0ltxB+9+lc4GNVNCZqE4kmpsyx2lrF7xCFvF
-         Qou26JYud/UCT9IpCYgWjQIGSC8gq1TzfgOpn6rWnLNSl3WdM5TKtQT7RXIkdSUw
-         kXFbObz9lsM+ULWNozCId2osJHj4zE0D3H5odU5DpcWLuSG0MmdxtWoQNJjSiPWt
-         HbRdvNmr/xeqcAfzdUdZxGf/VbXDdiNZn9TVv7UxxBHE812KNUf/Cvb5agDfEL7x
-         i2bWXbhr4jVTaDVr6MWl8Q7fAj79gdjQnUBWaQIDAQABAoIBAFU3kU6yIna9BViH
-         UX+S2ijtRBjZ68JjavEnp4xvo5h+nydcdT57q9lv/0nAi3g3gmXm/oJH+/ZU87HV
-         zy+zP+t+umDSChUkPBZFL5jxpKyN7BhMrP1KzRuEGYd6vJE/nfY5g095P5vDgnpX
-         o+SNg/YqrY1u8zgr/hnfRaV2/XyIDEEcQXTHseWTnnMQnULFU88xL8yq8ACT5GhK
-         7A9m5ukfcU6d/fs/psz5Yqw5IQsWbv1yJ3/FKufPHlo2Nzh3/3eDAZUXvaBgf1so
-         FWFpHtkry3OXOGaZ98HgF9hL0twS0pzMvuypdGUQAt6nyB1N5re4LK/MAOddqwEc
-         1+NQzfECgYEA2ryEf0GLJdtiYs3F4HbwTwJVIXdyWv7kjYGeMkutzzAjXl6wx8aq
-         kfqLJ7x7UkR5unZ1ajEbKBciAlSuFA+Gikn6a4Lv8h87aSnHpPd/2VSitRlI/gW7
-         w4U4CL3Br1JyonU5WA7VYfTow7KnHBhdwm27RMA9uosyIpveQRpqSG0CgYEAxsAS
-         wCQKrhuPq2YtGtFR7K4BL+N+0E1Vq6h49u1ukcgUe0GHVD3VzBypNCv7rWEVHzAg
-         biCVi7PCjzZYW4fYZmzVD4JbFLVGOUu7aJwLaE4wDe72DNr6YZhcS+Ta98BP+x0q
-         Wt34JNPDabRPfhXfhiCqnWjjod+4Zqx4VJVNgG0CgYB5EXL8xJhyAbW5Hk/x56Mm
-         +BGKjoR7HS3/rMiU6hJv5SMObrbGPI3YcqZm/gn8BO6jaEGg30E6tWMbiyc270j2
-         be/vZe/NQcAuevOHuX3IGvJb7nzaLO46UBgtrmnv0mCkzuFIfh1ZNKdI+i9Ie6wZ
-         m4bVjNod0EGVqlQgELDXGQKBgB+NNmzSS++/6FrpaZesSzkrlnynvOYMoOETacCp
-         iLgT70xx5q308w/oLORfZyDrHJNK7JsPCS6YZvadRgGh2zTHajuAEj2DWZaW8zV0
-         MEtqvi44FU+NI9qCeYSC3FAgc5IF20d5nX8bLxaEzWnSxx1f6jX7BMgZ4AhMsP2c
-         hiUxAoGAFaxn+t9blIjqUiuh0smSYFhLBVPZveYHQDmQYERjktptBd3X95fGnSKh
-         iDe2iPGyud2+Yu4X/VjHLh/MRru+ZXvPXw1XwEqX93q8a1n283ul0Rl9+KKKOVHR
-         eecTjI/BfXBf33mPRKny3xuHw6uwta2T3OXky9IhqYS1kkHiZWA=
-         -----END RSA PRIVATE KEY-----
-
    - path: /root/.ssh/config
      owner: root:root
      permissions: '0600'
diff --git a/tcp_tests/templates/virtual-mcp11-ovs/underlay--user-data1604.yaml b/tcp_tests/templates/virtual-mcp11-ovs/underlay--user-data1604.yaml
index 05ebd66..34c379f 100644
--- a/tcp_tests/templates/virtual-mcp11-ovs/underlay--user-data1604.yaml
+++ b/tcp_tests/templates/virtual-mcp11-ovs/underlay--user-data1604.yaml
@@ -7,7 +7,9 @@
      sudo: ALL=(ALL) NOPASSWD:ALL
      shell: /bin/bash
      ssh_authorized_keys:
-      - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDGwjUlYn9UsmWmAGSuEA2sICad7WqxgsJR0HKcMbbxi0tn96h4Cq2iGYmzlJ48egLm5R5pxyWnFvL4b/2zb+kKTPCMwRc9nv7xEGosEFNQEoSDd+gYu2CO0dgS2bX/7m2DXmzvhqPjxWQUXXsb0OYAS1r9Es65FE8y4rLaegz8V35xfH45bTCA0W8VSKh264XtGz12hacqsttE/UvyjJTZe+/XV+xJy3WAWxe8J/MuW1VqbqNewTmpTE/LJU8i6pG4msU6+wH99UvsGAOKQOduynUHKWG3VZg5YCjpbbV/t/pfW/vHB3b3jiifQmNhulyiG/CNnSQ5BahtV/7qPsYt vagrant@cfg01
+     {% for key in config.underlay.ssh_keys %}
+      - ssh-rsa {{ key['public'] }}
+     {% endfor %}
 
   disable_root: false
   chpasswd: