Bug 1773634

Description of problem:

When setting up a Rhel worker node by running the openshift_node role within openshift-ansible, the role attempts to install packages that aren't available for all architectures, as such it fails on non-x86_64 architectures.

Version-Release number of selected component (if applicable):
openshift-ansible release-4.2


How reproducible:
Consistent


Steps to Reproduce:
1. Against a ppc64le or s390x cluster run the scaleup.yml playbook (following https://access.redhat.com/documentation/en-us/openshift_container_platform/4.1/html/machine_management/adding-rhel-compute) to add an additional Rhel worker node.

Actual results:
The Install openshift support packages task fails:
TASK [openshift_node : Install openshift support packages] ************************************************************
Monday 04 November 2019  10:45:20 -0600 (0:00:00.141)       0:00:40.708 ******* 
FAILED - RETRYING: Install openshift support packages (3 retries left).
FAILED - RETRYING: Install openshift support packages (2 retries left).
FAILED - RETRYING: Install openshift support packages (1 retries left).
fatal: [192.168.79.50]: FAILED! => {"ansible_job_id": "972667483958.18155", "attempts": 3, "changed": false, "finished": 1, "msg": "No package matching 'microcode_ctl' found available, installed or updated", "rc": 126, "results": ["No package matching 'microcode_ctl' found available, installed or updated"]}

PLAY RECAP ************************************************************************************************************
192.168.79.50              : ok=2    changed=0    unreachable=0    failed=1    skipped=0    rescued=0    ignored=0   


Expected results:
The task succeeds and required packages are installed.


Additional info:
A fix has gone into release-4.3 so would only be required for release-4.2.