From 4d626d5a5c05f4676c0a403929de775404f9e63c Mon Sep 17 00:00:00 2001
From: Paul B <paul@bonaud.fr>
Date: Fri, 25 Jan 2019 11:55:41 +0100
Subject: feat(extensions): adds creation of extension on databases if needed

---
 tasks/main.yml                         |  1 +
 tasks/postgres-common-postinstall.yml  | 14 +++++++++++++-
 tasks/postgres-database-extensions.yml | 23 +++++++++++++++++++++++
 tasks/postgres-database.yml            |  7 +++++++
 4 files changed, 44 insertions(+), 1 deletion(-)
 create mode 100644 tasks/postgres-database-extensions.yml

diff --git a/tasks/main.yml b/tasks/main.yml
index 2fa7883..3d1892c 100644
--- a/tasks/main.yml
+++ b/tasks/main.yml
@@ -46,6 +46,7 @@
 - include: postgres-database.yml
     postgres_dbname={{ item.1.dbname }}
     postgres_owner={{ item.1.owner }}
+    postgres_extensions={{ item.1.extensions|default([]) }}
     postgres_port={{ item.0.port }}
   with_subelements:
     - "{{ postgres_clusters }}"
diff --git a/tasks/postgres-common-postinstall.yml b/tasks/postgres-common-postinstall.yml
index 277fafd..715782c 100644
--- a/tasks/postgres-common-postinstall.yml
+++ b/tasks/postgres-common-postinstall.yml
@@ -15,13 +15,25 @@
     src: /var/lib/postgresql/.ssh/id_rsa.pub
   register: db_server_pub_key
 
+- name: Check if barman is installed on barman server
+  getent:
+    database: passwd
+    key: "barman"
+  delegate_to: "{{ postgres_barman_server_public|default(postgres_barman_server) }}"
+  when: postgres_barman_server is defined
+  register: barman_user_exists
+  ignore_errors: true
+  changed_when: false
+
 - name: Allow SSH access on barman server
   authorized_key:
     user: "barman"
     key: "{{ db_server_pub_key['content']|b64decode }}"
     state: present
   delegate_to: "{{ postgres_barman_server_public|default(postgres_barman_server) }}"
-  when: postgres_barman_server is defined
+  when:
+    - postgres_barman_server is defined
+    - barman_user_exists is succeeded
 
 - name: Copy logrotate configuration for postgresql
   template: src=logrotate-postgresql-common.j2 dest=/etc/logrotate.d/postgresql-common owner=root group=root mode=0644
diff --git a/tasks/postgres-database-extensions.yml b/tasks/postgres-database-extensions.yml
new file mode 100644
index 0000000..edc4e8d
--- /dev/null
+++ b/tasks/postgres-database-extensions.yml
@@ -0,0 +1,23 @@
+---
+- name: "Install required packages for 'postgres_ext' ansible module"
+  apt:
+    name:
+      - libpq-dev
+      - python-psycopg2
+
+- name: Install system dependencies of extensions
+  apt:
+    name: "{{ postgres_extension.apt_deps | default([]) }}"
+    cache_valid_time: 86400
+
+- name: "CREATE EXTENSION on database {{ postgres_dbname }}"
+  become: true
+  become_user: postgres
+  become_method: su
+  postgresql_ext:
+    name: "{{ postgres_extension_name }}"
+    db: "{{ postgres_dbname }}"
+    port: "{{ postgres_port }}"
+  loop: "{{ postgres_extension.names | default([]) }}"
+  loop_control:
+    loop_var: postgres_extension_name
diff --git a/tasks/postgres-database.yml b/tasks/postgres-database.yml
index c7b09a8..c3537ea 100644
--- a/tasks/postgres-database.yml
+++ b/tasks/postgres-database.yml
@@ -18,3 +18,10 @@
     owner:            "{{ postgres_owner }}"
   when:
     - postgres_up.rc == 0
+
+- name: Create database extensions
+  include_tasks: postgres-database-extensions.yml
+  loop: "{{ postgres_extensions| default([]) }}"
+  loop_control:
+    loop_var: postgres_extension
+  when: postgres_up.rc == 0
-- 
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