Update to 2020-11-09 21:00

roles/postgresql_server/meta/main.yml

@@ -0,0 +1,4 @@
+---
+
+dependencies:
+  - role: repo_postgresql

roles/postgresql_server/tasks/main.yml

@@ -1,31 +1,16 @@
 ---
 
-- name: Configure PostgreSQL repository
-  yum_repository:
-    name: postgresql
-    description: PostgreSQL
-    baseurl: https://download.postgresql.org/pub/repos/yum/{{ pg_version }}/redhat/rhel-$releasever-$basearch
-    gpgcheck: True
-    gpgkey: https://download.postgresql.org/pub/repos/yum/RPM-GPG-KEY-PGDG-{{ pg_version }}
-    state: "{{ (pg_version != 'default') | ternary('present','absent') }}"
-  register: pg_repo
-  tags: pg,repo
-
-- name: Clear PostgreSQL repo cache
-  file: path=/var/cache/yum/{{ ansible_architecture }}/{{ ansible_distribution_major_version }}/postgresql/{{ item }} state=absent
-  loop:
-    - cachecookie
-    - repomd.xml
-  when: pg_repo.changed
-  tags: pg
-
-- name: Install dependencies
+- include_vars: "{{ item }}"
+  with_first_found:
+    - vars/{{ ansible_distribution }}-{{ ansible_distribution_major_version }}.yml
+    - vars/{{ ansible_distribution }}.yml
+    - vars/{{ ansible_os_family }}.yml
+    - vars/defaults.yml
+  tags: pg
+
+- name: Install Postgresql packages
   yum:
-    name:
-      - postgresql{{ (pg_version != 'default') | ternary(pg_version | string,'') }}
-      - postgresql{{ (pg_version != 'default') | ternary(pg_version | string,'') }}-server
-      - postgresql{{ (pg_version != 'default') | ternary(pg_version | string,'') }}-contrib
-      - python-psycopg2
+    name: "{{ pg_packages }}"
   tags: pg
 
 - name: Check if PG_VERSION exists

roles/postgresql_server/vars/CentOS-7.yml

@@ -0,0 +1,7 @@
+---
+
+pg_packages:
+  - postgresql{{ (pg_version != 'default') | ternary(pg_version | string,'') }}
+  - postgresql{{ (pg_version != 'default') | ternary(pg_version | string,'') }}-server
+  - postgresql{{ (pg_version != 'default') | ternary(pg_version | string,'') }}-contrib
+  - python-psycopg2

roles/postgresql_server/vars/CentOS-8.yml

@@ -0,0 +1,7 @@
+---
+
+pg_packages:
+  - postgresql{{ (pg_version != 'default') | ternary(pg_version | string,'') }}
+  - postgresql{{ (pg_version != 'default') | ternary(pg_version | string,'') }}-server
+  - postgresql{{ (pg_version != 'default') | ternary(pg_version | string,'') }}-contrib
+  - python3-psycopg2

roles/repo_postgresql/defaults/main.yml

@@ -0,0 +1,5 @@
+---
+
+# Version of postgres to install. 'default' means takes the one from the standard repo
+# If a version is specified (like 10, 11, 12, 13 etc.), upstream repository will be configured
+pg_version: default

roles/repo_postgresql/tasks/main.yml

@@ -0,0 +1,8 @@
+---
+
+  # Here we use a template instead of yum_repository because
+  # we might need to set module_hotfixes = true for el8. And yum_repository
+  # doesn't support this setting
+- name: Configure Postgres repo
+  template: src=postgresql.repo.j2 dest=/etc/yum.repos.d/postgresql.repo
+  tags: pg,repo

roles/repo_postgresql/templates/postgresql.repo.j2

@@ -0,0 +1,11 @@
+{% if pg_version != 'default' %}
+[postgresql]
+baseurl = https://download.postgresql.org/pub/repos/yum/{{ pg_version }}/redhat/rhel-$releasever-$basearch
+gpgcheck = 1
+gpgkey = https://download.postgresql.org/pub/repos/yum/RPM-GPG-KEY-PGDG-{{ pg_version }}
+name = PostgreSQL
+{% if ansible_os_family == 'RedHat' and ansible_distribution_major_version is version('8', '>=') %}
+# Workaround a bug in dnf which would make the default module mask packages from postgres repo
+module_hotfixes = true
+{% endif %}
+{% endif %}