Add postgresql role

postgresql/defaults/main.yml

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+---
+# Used to create specific Munin graphs.
+databases: ['titi', 'toto']
+
+# Tuning
+shared_buffers: 4GB
+work_mem: 8MB
+random_page_cost: 1.5
+effective_cache_size: 14GB

postgresql/handlers/main.yml

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+---
+- name: restart munin-node
+  service:
+    name: munin-node
+    state: restarted
+
+- name: restart nagios-nrpe-server
+  service:
+    name: nagios-nrpe-server
+    state: restarted
+
+- name: restart postgresql
+  service:
+    name: postgresql
+    state: restarted

postgresql/tasks/config.yml

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+---
+- name: Allow conf.d/*.conf files to be included in PostgreSQL configuration
+  lineinfile:
+    name: /etc/postgresql/9.4/main/postgresql.conf
+    line: include_dir = 'conf.d'
+  notify: restart postgresql
+
+- name: Create conf.d directory
+  file:
+    name: /etc/postgresql/9.4/main/conf.d/
+    state: directory
+    owner: postgres
+    group: postgres
+    mode: 0755
+
+- name: Copy PostgreSQL config file
+  template:
+    src: postgresql.conf
+    dest: /etc/postgresql/9.4/main/conf.d/evolinux.conf
+    owner: postgres
+    group: postgres
+    mode: 0644
+  notify: restart postgresql

postgresql/tasks/main.yml

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+---
+
+- include: package.yml
+- include: config.yml
+- include: nrpe.yml
+- include: munin.yml

postgresql/tasks/munin.yml

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+---
+- name: Add Munin plugins for PostgreSQL
+  file:
+    state: link
+    src: '/usr/share/munin/plugins/{{item}}'
+    dest: '/etc/munin/plugins/{{item}}'
+  with_items:
+  - postgres_bgwriter
+  - postgres_checkpoints
+  - postgres_connections_db
+  - postgres_users
+  - postgres_xlog
+  notify: restart munin-node
+
+- name: Add Munin plugins for PostgreSQL (for specific databases)
+  file:
+    state: link
+    src: '/usr/share/munin/plugins/{{item[0]}}'
+    dest: '/etc/munin/plugins/{{item[0]}}{{item[1]}}'
+  with_nested:
+  - ['postgres_cache_', 'postgres_connections_', 'postgres_locks_', 'postgres_querylength_', 'postgres_scans_', 'postgres_size_', 'postgres_transactions_', 'postgres_tuples_']
+  - '{{databases}}'
+  notify: restart munin-node

postgresql/tasks/nrpe.yml

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+---
+- name: Generate random password for nrpe user
+  shell: apg -n1 -m 12 -M SCNL
+  register: nrpe_password
+  changed_when: False
+
+- name: Create nrpe user
+  become_user: postgres
+  postgresql_user:
+    name: nrpe
+    password: '{{ nrpe_password.stdout }}'
+    no_password_changes: yes
+  register: create_nrpe_user
+
+- name: Add NRPE check
+  lineinfile:
+    name: /etc/nagios/nrpe.d/evolix.cfg
+    line: 'command[check_pgsql]=/usr/lib/nagios/plugins/check_pgsql -H localhost -l nrpe -p "{{nrpe_password.stdout}}"'
+  when: create_nrpe_user.changed
+  notify: restart nagios-nrpe-server

postgresql/tasks/package.yml

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+---
+
+- name: Install postgresql package
+  apt:
+    name: '{{item}}'
+  with_items: ['postgresql', 'ptop']

postgresql/templates/postgresql.conf

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+# Tuning
+shared_buffers = {{shared_buffers}}
+work_mem = {{work_mem}}
+#shared_preload_libraries = 'pg_stat_statements'
+#synchronous_commit = off
+checkpoint_segments = 30                
+checkpoint_completion_target = 0.9
+random_page_cost = {{random_page_cost}}
+effective_cache_size = {{effective_cache_size}}
+
+# Loging
+log_min_duration_statement = 1s
+log_checkpoints = on
+log_lock_waits = on                     
+log_temp_files = 5MB
+log_autovacuum_min_duration = 1s
+
+# Locales
+lc_monetary = 'fr_FR.UTF-8'
+lc_numeric = 'fr_FR.UTF-8'
+lc_time = 'fr_FR.UTF-8'
+default_text_search_config = 'pg_catalog.french'
+
+#escape_string_warning = off
+#standard_conforming_strings = off