library/roles/apache: Change the playbook to install and enable the mpm_worker as default. Manage enabling/disabling the service.

apache/defaults/main.yml

@@ -1,15 +1,26 @@
 ---
+apache_service_enabled: True
 apache_user: www-data
 apache_group: '{{ apache_user }}'
 
+# Possible choices: event, prefork (the old ones), worker (the threaded version), itm
+apache_mpm_mode: worker
+
 apache_packages:
   - apache2
-  - apache2-mpm-prefork
+  - 'apache2-mpm-{{ apache_mpm_mode }}'
   - apache2-utils
   - libapache2-mod-xsendfile
   - unzip
   - zip
 
+# Only one can be present at the same time. It needs to be listed as the last one
+apache_worker_modules:
+#  - { name: 'mpm_itm', state: 'absent' }
+  - { name: 'mpm_event', state: 'absent' }
+  - { name: 'mpm_prefork', state: 'absent' }
+  - { name: 'mpm_{{ apache_mpm_mode }}', state: 'present' }
+
 apache_default_modules:
   - headers
   - rewrite

apache/handlers/main.yml

@@ -2,3 +2,6 @@
 - name: apache2 reload
   service: name=apache2 state=reloaded
 
+- name: apache2 restart
+  service: name=apache2 state=restarted
+

apache/tasks/apache.yml

@@ -2,13 +2,19 @@
 - name: Install the apache packages
   apt: pkg={{ item }} state=installed force=yes
   with_items: apache_packages
-  tags: apache
+  tags: [ 'apache', 'apache_main_packages' ]
+
+- name: Load the required worker module
+  apache2_module: name={{ item.name }} state={{ item.state }}
+  with_items: apache_worker_modules
+  notify: apache2 restart
+  tags: [ 'apache', 'apache_modules', 'apache_workers_modules' ]
 
 - name: Load the required modules
   apache2_module: name={{ item }} state=present
   with_items: apache_default_modules
   notify: apache2 reload
-  tags: apache
+  tags: [ 'apache', 'apache_modules' ]
 
 - name: Remove the default virtualhost file
   file: dest=/etc/apache2/sites-enabled/{{ item }} state=absent
@@ -17,3 +23,13 @@
     - 000-default.conf
   notify: apache2 reload
   tags: apache
+
+- name: Ensure that the apache service is enabled and started
+  service: name=apache2 state=started enabled=yes
+  when: apache_service_enabled
+  tags: apache
+
+- name: Ensure that the apache service is disabled and stopped if we do not want it running
+  service: name=apache2 state=stopped enabled=no
+  when: not apache_service_enabled
+  tags: apache