OCPBUGS-18703: Correct upgrade for conflict packages.

** The yum module was originally having issues with upgrades (conflicts). Yum had a swap but the issues persisted.
A custom workaround was used by downloading RPMs. The process worked except for upgrades. It appeared that the evs-vswitchd daemon
was not correctly restarting causing lost connections during the upgrade process. The DNF module will use the --allowerasing option to
remove and install the package at the same time, avoiding the issue.

** Also noting that there were sometimes issues when the upgrade for openvswitch would upgrade to a package of the same version. This problem
has also been tested and works better with the DNF module.

roles/openshift_node/defaults/main.yml

@@ -86,9 +86,6 @@ openshift_node_support_packages_by_os_major_version:
     - openvswitch2.17
     - policycoreutils-python-utils
 
-openshift_conflict_packages:
-  - openvswitch
-
 openshift_node_support_packages_by_arch:
   ppc64le:
     - irqbalance

roles/openshift_node/tasks/install.yml

@@ -89,9 +89,11 @@
 
 - block:
   - name: Install openshift packages
-    package:
+    dnf:
       name: "{{ openshift_packages }}"
       state: latest
+      allowerasing: true
+      disable_gpg_check: true
     async: 3600
     poll: 30
     register: result

roles/openshift_node/tasks/package_conflicts.yml

@@ -1,50 +0,0 @@
----
-- name: Install manager to download packages
-  yum:
-    name: "yum-utils"
-    state: latest
-
-- name: Create a temporary directory for packages
-  file:
-    path: "{{ openshift_package_directory }}"
-    state: directory
-
-# not all packages can be safely or easily upgraded due to conflicts
-# Download the rpms and then remove conflicting packages and install the new ones.
-# A particular issue is openvswitch which conflicts with itself, but removing
-# older versions of the package causes network issues.
-- name: Download rpms for conflicting packages
-  command: "yumdownloader --destdir {{ openshift_package_directory }} {{ item }}"
-  with_items: "{{ openshift_node_support_packages_by_os_major_version[ansible_distribution_major_version] }}"
-
-- name: Find all downloaded rpms
-  find:
-    paths: "{{ openshift_package_directory }}"
-    patterns: "*.rpm"
-  register: rpms
-
-- name: Setting list of rpms
-  set_fact:
-    rpm_list: "{{ rpms.files | map(attribute='path') | list}}"
-
-- name: Remove known conflicts
-  yum:
-    name: "{{ item }}*"
-    state: absent
-  with_items: "{{ openshift_conflict_packages }}"
-
-- name: Install downloaded packages
-  yum:
-    name: "{{ rpm_list }}"
-    state: present
-    disable_gpg_check: true
-
-- name: Remove temporary directory
-  file:
-    path: "{{ openshift_package_directory }}"
-    state: absent
-
-- name: Remove temporary manager for downloaded packages
-  yum:
-    name: "yum-utils"
-    state: absent

roles/openshift_node/tasks/upgrade.yml

@@ -25,9 +25,6 @@
   - include_tasks: "{{ openshift_node_pre_upgrade_hook }}"
   when: openshift_node_pre_upgrade_hook is defined
 
-# Manually upgrade challenging packages that may have conflicts during normal upgrade
-- import_tasks: package_conflicts.yml
-
 # Upgrade Node Packages
 - import_tasks: install.yml