Fix cloud init runcmd templating

Signed-off-by: Bogdan Dobrelya <bdobreli@redhat.com>

playbooks/openstack/advanced-configuration.md

@@ -291,15 +291,15 @@ possible, like this `provision_install_custom.yml` example playbook:
 The playbook leverages a two existing provider interfaces: `provision.yml` and
 `install.yml`. For some cases, like SSH keys configuration and coordinated reboots of
 servers, the cloud-init runcmd directive may be a better choice though. User specified
-shell commands for cloud-init need to be lists, for example:
+shell commands for cloud-init need to be either strings or lists, for example:
 ```
 - openshift_openstack_cloud_init_runcmd:
-  - ['echo', 'foo']
-  - ['reboot']
+  - set -vx
+  - systemctl stop sshd # fences off ansible playbooks as we want to reboot later
+  - ['echo', 'foo', '>', '/tmp/foo']
+  - [ ls, /tmp/foo, '||', true ]
+  - reboot # unfences ansible playbooks to continue after reboot
 ```
-The commands should not use JSON escaped characters: `> < & '`. So the command
-`['foo', '>', '"bar"', '<', "'baz'", "&"]` is a bad one, while
-`['echo', '"${HOME}"']` is OK.
 
 **Note** To protect Nova servers from recreating when the user-data changes via
 `openshift_openstack_cloud_init_runcmd`, the

roles/openshift_openstack/templates/user_data.j2

@@ -13,8 +13,17 @@ write_files:
       Defaults:openshift !requiretty
 
 {% if openshift_openstack_cloud_init_runcmd %}
-runcmd:
+  - path: /root/ansible_install.sh
+    permissions: '0544'
+    content: |
 {% for cmd in openshift_openstack_cloud_init_runcmd %}
-  - {{ cmd|map('string')|list|tojson }}
+{% if cmd is string %}
+      {{ cmd }}
+{% elif cmd is iterable %}
+      {{ cmd|join(' ') }}
+{% endif %}
 {% endfor %}
+
+runcmd:
+  - /root/ansible_install.sh
 {% endif %}