Description of problem:

During the upgrade from 3.2 to 3.3 by running check in environment:

#ansible-playbook /usr/share/ansible/openshift-ansible/playbooks/byo/openshift-cluster/upgrades/v3_3/upgrade.yml --check

customer is facing error in /usr/share/ansible/openshift-ansible/playbooks/common/openshift-cluster/upgrades/pre.yml in section:

- name: Evaluate additional groups for upgrade 
...
  - name: Evaluate etcd_hosts_to_backup
    add_host:
      name: "{{ item }}"
      groups: etcd_hosts_to_backup
    with_items: groups.oo_etcd_to_config if groups.oo_etcd_to_config is defined and groups.oo_etcd_to_config | length > 0 else groups.oo_first_master

The error is below:

The error was: 'item' is undefined\n\nThe error appears to have been in '/usr/share/ansible/openshift-ansible/playbooks/common/openshift-cluster/upgrades/pre.yml': line 30, column 5, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n  tasks:\n  - name: Evaluate etcd_hosts_to_backup\n    ^ here\n"}

He is running the latest version of ansible 2.2 and openshift-ansible 3.3.28.1.
Check is performed on containerized version of environment.
etcd group is defined in ansible-hosts.


I've tested to run the pre.yml with check and it fails also. The message is showing it is:

[DEPRECATION WARNING]: Using bare variables is deprecated. Update your playbooks so that the environment value uses the full variable syntax ('{{groups.oo_etcd_to_config if 
groups.oo_etcd_to_config is defined and groups.oo_etcd_to_config | length > 0 else groups.oo_first_master}}').
[DEPRECATION WARNING]: Skipping task due to undefined Error, in the future this will be a fatal error.: 'dict object' has no attribute 'oo_first_master'.

The task for oo_first_master will end as:

TASK [Evaluate oo_first_master] ************************************************
skipping: [localhost]

According the docs [1] the check could be disabled for specific task by adding "check_mode: no". Also based on the docs it should not fail.
Can it be disabled? Is the task "Evaluate etcd_hosts_to_backup" needed in the upgrade?

[1] http://docs.ansible.com/ansible/playbooks_checkmode.html

Version-Release number of selected component (if applicable):

ansible-2.2.0-0.50.prerelease.el7.noarch
openshift-ansible-3.3.28-1.git.0.762256b.el7.noarch

from rhel-7-server-ose-3.3-rpms


How reproducible:

executed on my lab, results are same as above

Steps to Reproduce:
1.
2.
3.

Actual results:

Same result as customer

Expected results:

Additional info: