library/roles/couchbase: Modify the ganglia plugin handling to manage the removal.

d4science-ghn-cluster: disable the ganglia couchbase plugin, gmond apparently cannot handle its load.

couchbase/defaults/main.yml

@@ -42,6 +42,7 @@ couchbase_allowed_hosts:
   - '{{ network.nmis }}'
   - '{{ ansible_default_ipv4.address }}/32'
 
+couchbase_ganglia_plugin_enabled: True
 #couchbase_ganglia_url_username:
 #couchbase_ganglia_url_password:
 couchbase_monitored_buckets:

couchbase/tasks/ganglia-plugin.yml

@@ -5,11 +5,27 @@
 - name: Install the ganglia plugin for Couchbase. One instance per bucket
   template: src=couchbase.py.j2 dest=/usr/lib/ganglia/python_modules/couchbase_{{ item }}.py owner=root group=ganglia mode=0440
   with_items: '{{ couchbase_monitored_buckets }}'
+  when: couchbase_ganglia_plugin_enabled
   notify: Restart ganglia monitor
   tags: [ 'ganglia', 'couchbase' ]
 
 - name: Distribute the ganglia (gmond) configuration for the Couchbase plugin
   template: src=couchbase.pyconf.j2 dest=/etc/ganglia/conf.d/couchbase_{{ item }}.pyconf owner=root group=ganglia mode=0440
   with_items: '{{ couchbase_monitored_buckets }}'
+  when: couchbase_ganglia_plugin_enabled
+  notify: Restart ganglia monitor
+  tags: [ 'ganglia', 'couchbase' ]
+
+- name: Remove the ganglia (gmond) configuration for the Couchbase plugin when we want it disabled
+  file: dest=/etc/ganglia/conf.d/couchbase_{{ item }}.pyconf state=absent
+  with_items: '{{ couchbase_monitored_buckets }}'
+  when: not couchbase_ganglia_plugin_enabled
+  notify: Restart ganglia monitor
+  tags: [ 'ganglia', 'couchbase' ]
+
+- name: Remove the ganglia plugin for Couchbase when we want it disabled
+  file: dest=/usr/lib/ganglia/python_modules/couchbase_{{ item }}.py state=absent
+  with_items: '{{ couchbase_monitored_buckets }}'
+  when: not couchbase_ganglia_plugin_enabled
   notify: Restart ganglia monitor
   tags: [ 'ganglia', 'couchbase' ]