DCD-880: Install postgresql as part of slingshot backup

roles/create_backups/defaults/main.yml

@@ -1,5 +1,6 @@
 ---
 atl_slingshot_yum_repo_url: 'https://packages.atlassian.com/atlassian-slingshot-rpm'
+atl_amazon_extras_postgresql_version: '9.6'
 
 atl_slingshot_deb_pubkey_url: 'https://packages.atlassian.com/api/gpg/key/public'
 atl_slingshot_deb_repo_url: 'https://packages.atlassian.com/atlassian-slingshot-deb'

roles/create_backups/molecule/default/tests/test_default.py

@@ -8,3 +8,4 @@ testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(
 
 def test_slingshot_installed(host):
     assert host.file('/usr/bin/atlassian-slingshot').exists
+    assert host.file('/usr/bin/psql').exists

roles/create_backups/tasks/amazon.yml

@@ -11,4 +11,9 @@
 
 - name: Install atlassian-slingshot
   yum:
-    name: atlassian-slingshot
+    name: atlassian-slingshot
+
+- name: Enable Postgresql from 'extras'
+  command: amazon-linux-extras install -y "postgresql{{ atl_amazon_extras_postgresql_version }}"
+  args:
+    creates: /usr/bin/psql

roles/create_backups/tasks/main.yml

@@ -0,0 +1,5 @@
+---
+- name: Install distro-specific backup support packages
+  include_tasks: "../../tasks/{{ ansible_distribution|lower }}.yml"
+
+  

roles/create_backups/tasks/ubuntu.yml

@@ -19,4 +19,9 @@
   apt:
     name: atlassian-slingshot
     update_cache: yes
+    state: present
+
+- name: Install postgresql
+  apt:
+    name: postgresql
     state: present