fix(redis-server.yml): standardize variable names and improve configuration clarity

roles/common/tasks/redis-server.yml

@@ -1,24 +1,35 @@
-
 ---
-- name: (redis-server.yml) Set var '_redis_conf'
+- name: (redis-server.yml) Set var 'common_redis_conf'
   ansible.builtin.set_fact:
-    _redis_conf: "{{ '/etc/redis.conf' if ansible_facts['distribution'] == 'CentOS' else '/etc/redis/redis.conf' }}"
+    common_redis_conf: >-
+      {{
+        '/etc/redis.conf'
+        if ansible_facts['distribution'] == 'CentOS'
+        else '/etc/redis/redis.conf'
+      }}
 
 - name: (redis-server.yml) update
   ansible.builtin.apt:
     update_cache: true
-    cache_valid_time: "{{ 0 if apt_config_updated is defined and apt_config_updated.changed else apt_update_cache_valid_time }}"
+    cache_valid_time: >-
+      {{
+        0
+        if apt_config_updated is defined and apt_config_updated.changed
+        else apt_update_cache_valid_time
+      }}
   when:
     - ansible_facts['distribution'] == "Debian"
     - apt_update|bool
   tags:
     - redis-server
 
-- name: (redis-server.yml) Configure any half-installed packages 'dpkg --configure -a'
+- name: >-
+    (redis-server.yml) Configure any half-installed packages
+    'dpkg --configure -a'
   ansible.builtin.command: dpkg --configure -a
-  register: _dpkg_configure
+  register: common_dpkg_configure
-  changed_when: (_dpkg_configure.stdout | default('')) | length > 0
+  changed_when: (common_dpkg_configure.stdout | default('')) | length > 0
-  failed_when: _dpkg_configure.rc != 0
+  failed_when: common_dpkg_configure.rc != 0
   when:
     - ansible_facts['distribution'] == "Debian"
     - apt_dpkg_configure|bool
@@ -48,7 +59,7 @@
 - name: (redis-server.yml) Install redis packages (centos / fedora system)
   ansible.builtin.dnf:
     name: redis
-    state: latest
+    state: present
     update_cache: true
   when:
     - ansible_facts["os_family"] == "RedHat"
@@ -98,31 +109,50 @@
 
 - name: (redis-server.yml)  Check if redis configuration file exists
   ansible.builtin.stat:
-    path: "{{ _redis_conf }}.ORIG"
+    path: "{{ common_redis_conf }}.ORIG"
-  register: redis_conf_exists
+  register: common_redis_conf_exists
   tags:
     - redis-server
 
 - name: (redis-server.yml) Backup existing redis configuration file.
-  ansible.builtin.command: cp -a  "{{ _redis_conf }}" "{{ _redis_conf }}".ORIG
+  ansible.builtin.copy:
+    src: "{{ common_redis_conf }}"
+    dest: "{{ common_redis_conf }}.ORIG"
+    remote_src: true
+    mode: preserve
   when:
-    - redis_conf_exists.stat.exists == False
+    - not common_redis_conf_exists.stat.exists
   tags:
     - redis-server
 
 - name: (redis-server.yml) adjust redis configuration
   ansible.builtin.lineinfile:
-    dest: "{{ _redis_conf }}"
+    dest: "{{ common_redis_conf }}"
     regexp: "{{ item.regexp }}"
     insertafter: "{{ item.insertafter }}"
     line: "{{ item.key }} {{ item.val }}"
     state: present
   loop:
-    - { regexp: "^bind\\s+", key: "bind", val: "127.0.0.1 ::1", insertafter: "^#\\s*bind\\s+" }
+    - regexp: "^bind\\s+"
-    - { regexp: "^port\\s+", key: "port", val: "6379", insertafter: "^#\\s*port\\s+" }
+      key: "bind"
-    - { regexp: "^unixsocket\\s+", key: "unixsocket", val: "/run/redis/redis-server.sock", insertafter: "^#\\s*unixsocketperm" }
+      val: "127.0.0.1 ::1"
-    - { regexp: "^unixsocketperm", key: "unixsocketperm", val: "770", insertafter: "^unixsocket\\s+" }
+      insertafter: "^#\\s*bind\\s+"
-    - { regexp: "^logfile", key: "logfile", val: "/var/log/redis/redis-server.log", insertafter: "^#\\s+logfile\\s+" }
+    - regexp: "^port\\s+"
+      key: "port"
+      val: "6379"
+      insertafter: "^#\\s*port\\s+"
+    - regexp: "^unixsocket\\s+"
+      key: "unixsocket"
+      val: "/run/redis/redis-server.sock"
+      insertafter: "^#\\s*unixsocketperm"
+    - regexp: "^unixsocketperm"
+      key: "unixsocketperm"
+      val: "770"
+      insertafter: "^unixsocket\\s+"
+    - regexp: "^logfile"
+      key: "logfile"
+      val: "/var/log/redis/redis-server.log"
+      insertafter: "^#\\s+logfile\\s+"
   notify: "Restart redis-server"
   tags:
     - redis-server