library/roles/ganglia/tasks/main.yml: Remove the ganglia packages when ganglia_enabled is False

ganglia/tasks/main.yml

@@ -1,9 +1,9 @@
 ---
+- block:
     - name: Install the ganglia client
       apt: pkg={{ item }} state=installed update_cache=yes cache_valid_time=3600
       with_items:
         - ganglia-monitor
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Install the ganglia linux specific plugins. We need at least ubuntu trusty. Or debian 7. Or debian 8
       apt: pkg={{ item }} state=installed force=yes
@@ -12,7 +12,6 @@
         - ganglia-monitor-python
       notify: Restart ganglia monitor
       when: is_trusty
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Install the ganglia linux specific plugins. We need at least ubuntu trusty. Or debian 7. Or debian 8
       apt: pkg={{ item }} state=installed force=yes
@@ -21,7 +20,6 @@
         - ganglia-monitor-python
       notify: Restart ganglia monitor
       when: is_debian7
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Install the ganglia linux specific plugins. We need at least ubuntu trusty. Or debian 7. Or debian 8
       apt: pkg={{ item }} state=installed force=yes
@@ -30,58 +28,57 @@
         - ganglia-monitor-python
       notify: Restart ganglia monitor
       when: is_debian8
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Distribute the ganglia configuration file for Ubuntu >= 12.04
       template: src=gmond.j2 dest=/etc/ganglia/gmond.conf owner=root group=root mode=444
       when: ( is_not_ubuntu_less_than_precise ) or ( is_debian8 )
       notify: Restart ganglia monitor
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Distribute the ganglia configuration file for Debian 7
       template: src=gmond.j2 dest=/etc/ganglia/gmond.conf owner=root group=root mode=444
       when: is_debian7
       notify: Restart ganglia monitor
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Distribute the ganglia configuration file for Ubuntu < 12.04 and >= 10.04 and Debian 6
       template: src=gmond.j2 dest=/etc/ganglia/gmond.conf owner=root group=root mode=444
       when: is_ubuntu_between_10_04_and_11_04_and_is_debian_6
       notify: Restart ganglia monitor
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Distribute the ganglia configuration file for Ubuntu < 10.04 and Debian 4
       template: src=gmond-2.5.j2 dest=/etc/gmond.conf owner=root group=root mode=444
-  when:
-    - is_ubuntu_between_8_and_9_and_is_debian_4
+      when: is_ubuntu_between_8_and_9_and_is_debian_4
       notify: Restart ganglia monitor
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Distribute the ganglia configuration on broken hardy 8.04.4
       template: src=gmond-2.5.j2 dest=/etc/gmond.conf owner=root group=root mode=444
-  when:
-    - is_broken_hardy_lts
+      when: is_broken_hardy_lts
       notify: Restart ganglia monitor
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Setup the ganglia directory for python modules
       file: dest=/usr/lib/ganglia/python_modules state=directory
       when: is_precise
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Ensure that the ganglia include conf dir exists
       file: path=/etc/ganglia/conf.d state=directory
       when: is_precise
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Setup the ganglia configuration for python modules
       copy: src=modpython.conf dest=/etc/ganglia/conf.d/modpython.conf owner=root group=root mode=0644
       notify: Restart ganglia monitor
       when: is_precise
-  tags: [ 'monitoring', 'ganglia' ]
 
     - name: Set the kernel UDP buffer limits (net.core.rmem_max) to a value that is double of the ganglia udp buffer
       sysctl: name=net.core.rmem_max value={{ ganglia_udp_recv_buffer *2 }} reload=yes state=present
       when: ganglia_set_rmem
+
+  when: ganglia_enabled
   tags: [ 'monitoring', 'ganglia' ]
 
+- block:
+    - name: Install the ganglia client
+      apt: pkg={{ item }} state=absent purge=yes
+      with_items:
+        - ganglia-monitor
+
+  when: not ganglia_enabled
+  tags: [ 'monitoring', 'ganglia' ]