diff --git a/jenkins/client/job/salt-models/tests.yml b/jenkins/client/job/salt-models/tests.yml
index 4b6c006..7849adc 100644
--- a/jenkins/client/job/salt-models/tests.yml
+++ b/jenkins/client/job/salt-models/tests.yml
@@ -73,6 +73,16 @@
               url: "${_param:jenkins_gerrit_url}/mk/mk-pipelines"
               credentials: "gerrit"
               script: test-system-reclass-pipeline.groovy
+            trigger:
+              gerrit:
+                project:
+                  salt-models/{{name}}:
+                    branches:
+                      - master
+                event:
+                  comment:
+                    - addedContains:
+                        commentAddedCommentContains: '(recheck|reverify)'
             concurrent: true
             param:
               TEST_MODELS:
@@ -85,6 +95,9 @@
               DEFAULT_GIT_REF:
                 type: string
                 default: master
+              PARALLEL_NODE_GROUP_SIZE:
+                type: string
+                default: "5"
         test_salt_model_cookiecutter:
           name: test-salt-model-cookiecutter-{{cookiecutter_template}}
           jobs:
diff --git a/reclass/storage/system/openstack_dns_cluster.yml b/reclass/storage/system/openstack_dns_cluster.yml
index d134c88..d671e78 100644
--- a/reclass/storage/system/openstack_dns_cluster.yml
+++ b/reclass/storage/system/openstack_dns_cluster.yml
@@ -12,7 +12,7 @@
           - cluster.${_param:cluster_name}.openstack.dns
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: trusty
+            linux_system_codename: xenial
             single_address: ${_param:openstack_dns_node01_address}
             keepalived_vip_priority: 110
         openstack_dns_node02:
@@ -22,6 +22,6 @@
           - cluster.${_param:cluster_name}.openstack.dns
           params:
             salt_master_host: ${_param:reclass_config_master}
-            linux_system_codename: trusty
+            linux_system_codename: xenial
             single_address: ${_param:openstack_dns_node02_address}
             keepalived_vip_priority: 111