Add support Rocky Linux

Author: vitabaks

.github/workflows/molecule.yml

@@ -24,6 +24,7 @@ jobs:
           - ubuntu1804
           - centos8
           - centos7
+          - rockylinux8
 
     steps:
       - name: checkout

.github/workflows/schedule_pg_rockylinux8.yml

@@ -0,0 +1,33 @@
+---
+# yamllint disable rule:truthy
+
+name: scheduled PostgreSQL (RockyLinux 8)
+
+on:
+  schedule:
+    - cron: '15 1 * * *'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@v2
+
+      - name: Set up Python 3
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.x'
+
+      - name: Install dependencies
+        run: pip3 install molecule[docker] ansible
+
+      - name: Run Molecule tests
+        run: molecule test
+        env:
+          PY_COLORS: '1'
+          ANSIBLE_FORCE_COLOR: '1'
+          MOLECULE_DISTRO: rockylinux8
+
+...

README.md

@@ -72,8 +72,9 @@ RedHat and Debian based distros (x86_64)
 - Ubuntu: 18.04
 - CentOS: 7
 - OracleLinux 7
+- RockyLinux 8.4
 
-:white_check_mark: tested, works fine: `Debian 9/10, Ubuntu 18.04/20.04, CentOS 7/8, OracleLinux 7/8`
+:white_check_mark: tested, works fine: `Debian 9/10, Ubuntu 18.04/20.04, CentOS 7/8, OracleLinux 7/8, RockyLinux 8.4`
 
 ###### PostgreSQL versions: 
 all supported PostgreSQL versions
@@ -91,6 +92,7 @@ _Table of results of daily automated testing of cluster deployment:_
 | CentOS 8     | [![GitHub Workflow Status](https://img.shields.io/github/workflow/status/vitabaks/postgresql_cluster/scheduled%20PostgreSQL%20(CentOS%208))](https://github.com/vitabaks/postgresql_cluster/actions?query=workflow%3A%22scheduled+PostgreSQL+%28CentOS+8%29%22) |
 | Oracle Linux 7 | [![GitHub Workflow Status](https://img.shields.io/github/workflow/status/vitabaks/postgresql_cluster/scheduled%20PostgreSQL%20(OracleLinux%207))](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_oracle_linux7.yml) |
 | Oracle Linux 8 | [![GitHub Workflow Status](https://img.shields.io/github/workflow/status/vitabaks/postgresql_cluster/scheduled%20PostgreSQL%20(OracleLinux%208))](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_oracle_linux8.yml) |
+| Rocky Linux 8 | [![GitHub Workflow Status](https://img.shields.io/github/workflow/status/vitabaks/postgresql_cluster/scheduled%20PostgreSQL%20(RockyLinux%208))](https://github.com/vitabaks/postgresql_cluster/actions/workflows/schedule_pg_rockylinux8.yml) |
 
 
 ###### Ansible version 

group_vars/all

@@ -4,13 +4,15 @@
 os_valid_distributions:
   - RedHat
   - CentOS
+  - Rocky
   - OracleLinux
   - Ubuntu
   - Debian
 
 os_minimum_versions:
   RedHat: 7
   CentOS: 7
+  Rocky: 8.4
   OracleLinux: 7
   Ubuntu: 18.04
   Debian: 9