diff --git a/tcp_tests/templates/virtual-mcp-sl-os/openstack.yaml b/tcp_tests/templates/virtual-mcp-sl-os/openstack.yaml
index fe35460..362804f 100644
--- a/tcp_tests/templates/virtual-mcp-sl-os/openstack.yaml
+++ b/tcp_tests/templates/virtual-mcp-sl-os/openstack.yaml
@@ -23,13 +23,13 @@
   skip_fail: false
 
 - description: Restart apache due to PROD-10477
-  cmd: salt --hard-crash --state-output=mixed --state-verbose=False 'ctl*' cmd.run "systemctl restart apache2"
+  cmd: salt --hard-crash --state-output=mixed --state-verbose=False 'ctl*' cmd.run "service apache2 restart"
   node_name: {{ HOSTNAME_CFG01 }}
   retry: {count: 1, delay: 15}
   skip_fail: false
 
 - description: Check apache status to PROD-10477
-  cmd: salt --hard-crash --state-output=mixed --state-verbose=False 'ctl*' cmd.run "systemctl status apache2"
+  cmd: salt --hard-crash --state-output=mixed --state-verbose=False 'ctl*' cmd.run "service apache2 status"
   node_name: {{ HOSTNAME_CFG01 }}
   retry: {count: 1, delay: 15}
   skip_fail: false
diff --git a/tcp_tests/templates/virtual-mcp-sl-os/salt.yaml b/tcp_tests/templates/virtual-mcp-sl-os/salt.yaml
index 19e74bd..9084d80 100644
--- a/tcp_tests/templates/virtual-mcp-sl-os/salt.yaml
+++ b/tcp_tests/templates/virtual-mcp-sl-os/salt.yaml
@@ -4,6 +4,7 @@
 
 {% set SALT_MODELS_REPOSITORY = os_env('SALT_MODELS_REPOSITORY','https://gerrit.mcp.mirantis.net/salt-models/mcp-virtual-lab') %}
 # Other salt model repository parameters see in shared-salt.yaml
+{% set OVERRIDES = os_env('OVERRIDES', 'override_example: true') %}
 
 {% import 'shared-salt.yaml' as SHARED with context %}
 
@@ -17,6 +18,19 @@
 
 {{ SHARED.MACRO_RUN_SALT_MASTER_UNDERLAY_STATES() }}
 
+{%- if OVERRIDES != '' %}
+{%- for param in OVERRIDES.splitlines() %}
+{%- set key, value = param.replace(' ','').split(':') %}
+- description: Override cluster parameters
+  cmd: |
+    salt-call reclass.cluster_meta_set name='{{ key }}' value='{{ value }}' file_name=/srv/salt/reclass/classes/cluster/overrides.yml
+    salt '*' saltutil.refresh_pillar
+  node_name: {{ HOSTNAME_CFG01 }}
+  retry: {count: 1, delay: 1}
+  skip_fail: false
+{%- endfor %}
+{%- endif %}
+
 {{ SHARED.MACRO_GENERATE_INVENTORY() }}
 
 {{ SHARED.MACRO_BOOTSTRAP_ALL_MINIONS() }}
diff --git a/tcp_tests/templates/virtual-mcp-sl-os/underlay.yaml b/tcp_tests/templates/virtual-mcp-sl-os/underlay.yaml
index 4b4ce8e..d4e064f 100644
--- a/tcp_tests/templates/virtual-mcp-sl-os/underlay.yaml
+++ b/tcp_tests/templates/virtual-mcp-sl-os/underlay.yaml
@@ -301,84 +301,6 @@
               interfaces: *interfaces
               network_config: *network_config
 
-          - name: {{ HOSTNAME_MON01 }}
-            role: salt_minion
-            params:
-              vcpu: !os_env SLAVE_NODE_CPU, 3
-              memory: !os_env SLAVE_NODE_MEMORY, 2048
-              boot:
-                - hd
-              cloud_init_volume_name: iso
-              cloud_init_iface_up: ens3
-              volumes:
-                - name: system
-                  capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
-                  format: qcow2
-                - name: iso  # Volume with name 'iso' will be used
-                             # for store image with cloud-init metadata.
-                  capacity: 1
-                  format: raw
-                  device: cdrom
-                  bus: ide
-                  cloudinit_meta_data: *cloudinit_meta_data
-                  cloudinit_user_data: *cloudinit_user_data_1604
-
-              interfaces: *interfaces
-              network_config: *network_config
-
-          - name: {{ HOSTNAME_MON02 }}
-            role: salt_minion
-            params:
-              vcpu: !os_env SLAVE_NODE_CPU, 3
-              memory: !os_env SLAVE_NODE_MEMORY, 2048
-              boot:
-                - hd
-              cloud_init_volume_name: iso
-              cloud_init_iface_up: ens3
-              volumes:
-                - name: system
-                  capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
-                  format: qcow2
-                - name: iso  # Volume with name 'iso' will be used
-                             # for store image with cloud-init metadata.
-                  capacity: 1
-                  format: raw
-                  device: cdrom
-                  bus: ide
-                  cloudinit_meta_data: *cloudinit_meta_data
-                  cloudinit_user_data: *cloudinit_user_data_1604
-
-              interfaces: *interfaces
-              network_config: *network_config
-
-          - name: {{ HOSTNAME_MON03 }}
-            role: salt_minion
-            params:
-              vcpu: !os_env SLAVE_NODE_CPU, 3
-              memory: !os_env SLAVE_NODE_MEMORY, 2048
-              boot:
-                - hd
-              cloud_init_volume_name: iso
-              cloud_init_iface_up: ens3
-              volumes:
-                - name: system
-                  capacity: !os_env NODE_VOLUME_SIZE, 150
-                  backing_store: cloudimage1604
-                  format: qcow2
-                - name: iso  # Volume with name 'iso' will be used
-                             # for store image with cloud-init metadata.
-                  capacity: 1
-                  format: raw
-                  device: cdrom
-                  bus: ide
-                  cloudinit_meta_data: *cloudinit_meta_data
-                  cloudinit_user_data: *cloudinit_user_data_1604
-
-              interfaces: *interfaces
-              network_config: *network_config
-
           - name: {{ HOSTNAME_PRX01 }}
             role: salt_minion
             params:
@@ -510,3 +432,81 @@
 
               interfaces: *all_interfaces
               network_config: *all_network_config
+
+          - name: {{ HOSTNAME_MON01 }}
+            role: salt_minion
+            params:
+              vcpu: !os_env SLAVE_NODE_CPU, 3
+              memory: !os_env SLAVE_NODE_MEMORY, 2048
+              boot:
+                - hd
+              cloud_init_volume_name: iso
+              cloud_init_iface_up: ens3
+              volumes:
+                - name: system
+                  capacity: !os_env NODE_VOLUME_SIZE, 150
+                  backing_store: cloudimage1604
+                  format: qcow2
+                - name: iso  # Volume with name 'iso' will be used
+                             # for store image with cloud-init metadata.
+                  capacity: 1
+                  format: raw
+                  device: cdrom
+                  bus: ide
+                  cloudinit_meta_data: *cloudinit_meta_data
+                  cloudinit_user_data: *cloudinit_user_data_1604
+
+              interfaces: *interfaces
+              network_config: *network_config
+
+          - name: {{ HOSTNAME_MON02 }}
+            role: salt_minion
+            params:
+              vcpu: !os_env SLAVE_NODE_CPU, 3
+              memory: !os_env SLAVE_NODE_MEMORY, 2048
+              boot:
+                - hd
+              cloud_init_volume_name: iso
+              cloud_init_iface_up: ens3
+              volumes:
+                - name: system
+                  capacity: !os_env NODE_VOLUME_SIZE, 150
+                  backing_store: cloudimage1604
+                  format: qcow2
+                - name: iso  # Volume with name 'iso' will be used
+                             # for store image with cloud-init metadata.
+                  capacity: 1
+                  format: raw
+                  device: cdrom
+                  bus: ide
+                  cloudinit_meta_data: *cloudinit_meta_data
+                  cloudinit_user_data: *cloudinit_user_data_1604
+
+              interfaces: *interfaces
+              network_config: *network_config
+
+          - name: {{ HOSTNAME_MON03 }}
+            role: salt_minion
+            params:
+              vcpu: !os_env SLAVE_NODE_CPU, 3
+              memory: !os_env SLAVE_NODE_MEMORY, 2048
+              boot:
+                - hd
+              cloud_init_volume_name: iso
+              cloud_init_iface_up: ens3
+              volumes:
+                - name: system
+                  capacity: !os_env NODE_VOLUME_SIZE, 150
+                  backing_store: cloudimage1604
+                  format: qcow2
+                - name: iso  # Volume with name 'iso' will be used
+                             # for store image with cloud-init metadata.
+                  capacity: 1
+                  format: raw
+                  device: cdrom
+                  bus: ide
+                  cloudinit_meta_data: *cloudinit_meta_data
+                  cloudinit_user_data: *cloudinit_user_data_1604
+
+              interfaces: *interfaces
+              network_config: *network_config