redis: Configure munin when working in instance mode

CHANGELOG.md

@@ -12,6 +12,7 @@ The **patch** part changes incrementally at each release.
 
 ### Added
 * evomaintenance: database variables must be set or the task fails
+* redis: Configure munin when working in instance mode
 
 ### Changed
 

redis/tasks/main.yml

@@ -55,7 +55,19 @@
     - munin
 
 - include: munin.yml
-  when: _munin_installed.stat.exists and _munin_installed.stat.isdir
+  when:
+    - _munin_installed.stat.exists
+    - _munin_installed.stat.isdir
+    - redis_instance_name is not defined
+  tags:
+    - redis
+    - munin
+
+- include: munin-instances.yml
+  when:
+    - _munin_installed.stat.exists
+    - _munin_installed.stat.isdir
+    - redis_instance_name is defined
   tags:
     - redis
     - munin

redis/tasks/munin-instances.yml

@@ -0,0 +1,61 @@
+---
+- name: Install munin check dependencies
+  apt:
+    name: libswitch-perl
+    state: present
+  tags:
+    - redis
+
+- include_role:
+    name: remount-usr
+  tags:
+    - redis
+
+- name: Create plugin directory
+  file:
+    name: /usr/local/share/munin/
+    state: directory
+    mode: "0755"
+  tags:
+    - redis
+
+- name: Create plugin directory
+  file:
+    name: /usr/local/share/munin/plugins/
+    state: directory
+    mode: "0755"
+  tags:
+    - redis
+
+- name: Copy redis munin plugin
+  copy:
+    src: munin_redis
+    dest: /usr/local/share/munin/plugins/redis_
+    mode: "0755"
+  notify: restart munin-node
+  tags:
+    - redis
+
+- name: Enable redis munin plugin
+  file:
+    src: /usr/local/share/munin/plugins/redis_
+    dest: "/etc/munin/plugins/{{ redis_instance_name }}_redis_{{item}}"
+    state: link
+  with_items:
+    - connected_clients
+    - key_ratio
+    - keys_per_sec
+    - per_sec
+    - used_keys
+    - used_memory
+  notify: restart munin-node
+  tags:
+    - redis
+
+- name: Configure redis plugin for munin
+  template:
+    src: templates/munin-plugin-instances.conf.j2
+    dest: '/etc/munin/plugin-conf.d/evolinux.redis_{{ redis_instance_name }}'
+    mode: 0740
+  notify: restart munin-node
+  tags: redis

redis/templates/munin-plugin-instances.conf.j2

@@ -0,0 +1,8 @@
+# Ansible managed
+
+[{{ redis_instance_name }}_redis_*]
+env.title_prefix Instance {{ redis_instance_name }}
+env.port {{ redis_port }}
+{% if redis_password %}
+env.password {{ redis_password }}
+{% endif %}