Initial AlmaLinux support (#7538)

* AlmaLinux: ansible>2.9.19 is needed to know about AlmaLinux

* AlmaLinux: identify as a centos derrivative

* AlmaLinux: add AlmaLinux to checks for CentOS

* Use ansible_os_family to compare family and not distribution

roles/kubernetes/preinstall/tasks/0020-verify-settings.yml

@@ -24,8 +24,8 @@
 
 - name: Stop if unknown OS
   assert:
-    that: ansible_os_family in ['RedHat', 'CentOS', 'Fedora', 'Ubuntu', 'Debian', 'Flatcar Container Linux by Kinvolk', 'Suse', 'ClearLinux', 'OracleLinux']
-    msg: "{{ ansible_os_family }} is not a known OS"
+    that: ansible_distribution in ['RedHat', 'CentOS', 'Fedora', 'Ubuntu', 'Debian', 'Flatcar Container Linux by Kinvolk', 'Suse', 'ClearLinux', 'OracleLinux', 'AlmaLinux']
+    msg: "{{ ansible_distribution }} is not a known OS"
   when: not ignore_assert_errors
 
 - name: Stop if unknown network plugin

roles/kubernetes/preinstall/tasks/0070-system-packages.yml

@@ -22,7 +22,7 @@
     path: "{{ yum_repo_dir }}/docker.repo"
     state: absent
   when:
-    - ansible_distribution in ["CentOS","RedHat","OracleLinux"]
+    - ansible_os_family == "RedHat"
     - not is_fedora_coreos
 
 - name: Install python3-dnf for latest RedHat versions
@@ -39,12 +39,12 @@
   tags:
     - bootstrap-os
 
-- name: Install epel-release on RedHat/CentOS
+- name: Install epel-release on RHEL derivatives
   package:
     name: epel-release
     state: present
   when:
-    - ansible_distribution in ["CentOS","RedHat"]
+    - ansible_os_family == "RedHat"
     - not is_fedora_coreos
     - epel_enabled|bool
   tags:

roles/kubernetes/preinstall/tasks/main.yml

@@ -109,6 +109,6 @@
   when:
     - not dns_late
     - azure_check.stat.exists
-    - ansible_distribution in ["CentOS","RedHat","OracleLinux"]
+    - ansible_os_family == "RedHat"
   tags:
     - bootstrap-os