Don't initialize the mongo replicaset.

playbooks/roles/mongo_3_2/tasks/main.yml

@@ -280,6 +280,7 @@
     rs_config: "{{ MONGO_RS_CONFIG }}"
   run_once: true
   register: replset_status
+  when: initialize_replica_set
   tags:
     - "manage"
     - "manage:db"
@@ -297,6 +298,7 @@
       password: "{{ MONGO_ADMIN_PASSWORD }}"
   register: status
   until: status.status is defined and 'PRIMARY' in status.status.members|map(attribute='stateStr')|list
+  when: initialize_replica_set
   retries: 5
   delay: 2
   run_once: true
@@ -318,6 +320,7 @@
     replica_set: "{{ MONGO_REPL_SET }}"
   with_items: "{{ MONGO_USERS }}"
   run_once: true
+  when: initialize_replica_set
   tags:
     - "manage"
     - "manage:db"

util/packer/jenkins_worker.json

@@ -52,7 +52,7 @@
     "command": ". {{user `venv_dir`}}/bin/activate && ansible-playbook",
     "inventory_groups": "jenkins_worker",
     "extra_arguments": [
-      "-e \"jenkins_edx_platform_version={{user `test_platform_version`}} NEWRELIC_LICENSE_KEY={{user `new_relic_key`}}\"",
+      "-e \"jenkins_edx_platform_version={{user `test_platform_version`}} NEWRELIC_LICENSE_KEY={{user `new_relic_key`}} initialize_replica_set=false\"",
       "-vvv"
       ]
   }, {