install tar and gzip if needed

defaults/main.yml

@@ -6,6 +6,9 @@ postgresql_backup:
   required_packages:
     - postgresql-client
     - cron
+  optional_packages:
+    - tar
+    - gzip
   backup_dir: /var/backup/postgresql
   date_format: '%Y-%m-%d_%H-%M'
   user: root

tasks/packages.yml

@@ -4,3 +4,10 @@
   package:
     name: "{{ postgresql_backup.required_packages }}"
     state: present
+
+- name: "Install tar and gzip"
+  become: true
+  package:
+    name: "{{ postgresql_backup.optional_packages }}"
+    state: present
+  when: postgresql_backup.create_tar_gz | bool

templates/postgresql-backup-script.sh.j2

@@ -20,7 +20,9 @@ backup_databases() {
   {% endif %}
   if (umask 077 && pg_dump -F {{ postgresql_backup.export_option | string }} -h "{{ db.host | default( 'localhost' ) }}" -U "{{ db.user | default( 'postgres' ) }}" -p "{{ db.port | default( '5432' ) }}" "{{ db.name }}" -f "{{ db.name }}.in_progress.psql"); then
 	  {% if postgresql_backup.create_tar_gz %}
+    mv "{{ db.name }}.in_progress.psql" "{{ db.name }}.psql"
     tar -czvf "{{ db.name }}.psql.tar.gz" "{{ db.name }}.in_progress.psql"
+    rm "{{ db.name }}.psql"
     {% else %}
     mv "{{ db.name }}.in_progress.psql" "{{ db.name }}.psql"
     {% endif %}

vars/main.yml

@@ -3,6 +3,9 @@ _postgresql_backup:
   required_packages:
     - postgresql-client
     - cron
+  optional_packages:
+    - tar
+    - gzip
   backup_dir: /var/backup/postgresql
   date_format: '%Y-%m-%d_%H-%M'
   user: root
@@ -14,5 +17,5 @@ _postgresql_backup:
   databases: []
 
 # versionscheck
-playbook_version_number: 22 # should be int
+playbook_version_number: 23 # should be int
 playbook_version_path: 'role-postgresql-backup_roles-ansible_github.com.version' # unique string