Feat: Ansible backwards compatibility (#485)

Author: fidanf

CHANGELOG.md

@@ -6,6 +6,10 @@ BREAKING CHANGES:
 
 CentOS 8 has reached EoL and has thus been removed from the list of supported platforms.
 
+FEATURES:
+
+Support for ansible-base (ansible-core `<2.12`).
+
 BUG FIXES:
 
 The Molecule `upgrade` scenario verification test no longer has to be updated on each new NGINX OSS release.

tasks/opensource/install-debian.yml

@@ -27,6 +27,6 @@
     name: "nginx{{ nginx_version | default('') }}"
     state: "{{ nginx_state }}"
     update_cache: true
-    allow_downgrade: true
+    allow_downgrade: "{{ omit if ansible_version.full is version('2.12', '<') else true }}"
   ignore_errors: "{{ ansible_check_mode }}"
   notify: (Handler) Run NGINX

tasks/opensource/install-redhat.yml

@@ -8,7 +8,7 @@
     enabled: true
     gpgcheck: true
     mode: 0644
-    module_hotfixes: true
+    module_hotfixes: "{{ omit if ansible_version.full is version('2.11', '<') else true }}"
     state: "{{ (nginx_state == 'uninstall') | ternary('absent', 'present') }}"
   when: nginx_manage_repo | bool
 
@@ -17,6 +17,6 @@
     name: "nginx{{ nginx_version | default('') }}"
     state: "{{ nginx_state }}"
     update_cache: true
-    allow_downgrade: true
+    allow_downgrade: "{{ omit if ansible_version.full is version('2.12', '<') else true }}"
   ignore_errors: "{{ ansible_check_mode }}"
   notify: (Handler) Run NGINX

tasks/plus/install-debian.yml

@@ -25,7 +25,7 @@
     name: "nginx-plus{{ nginx_version | default('') }}"
     state: "{{ nginx_state }}"
     update_cache: true
-    allow_downgrade: true
+    allow_downgrade: "{{ omit if ansible_version.full is version('2.12', '<') else true }}"
   ignore_errors: "{{ ansible_check_mode }}"
   when: nginx_license_status is not defined
   notify: (Handler) Run NGINX

tasks/plus/install-redhat.yml

@@ -18,7 +18,7 @@
     name: "nginx-plus{{ nginx_version | default('') }}"
     state: "{{ nginx_state }}"
     update_cache: true
-    allow_downgrade: true
+    allow_downgrade: "{{ omit if ansible_version.full is version('2.12', '<') else true }}"
   ignore_errors: "{{ ansible_check_mode }}"
   when: nginx_license_status is not defined
   notify: (Handler) Run NGINX