Allow to set options for barman connectivity

- Allow to pass arbitrary options
- Build the URL in a dedicated step
- Allow to specify path prefix for barman files
- Add documentation in [README.md](README.md)

5 files changed, 23 insertions, 7 deletions

diff --git a/README.md b/README.md
index 5482bc6..050fb65 100644
--- a/README.md
+++ b/README.md
@@ -78,6 +78,13 @@ postgres_replication_hosts:
 
 # Ansible related Configuration
 postgres_become_method: su  # Optional
+
+# Barman connectivity
+postgres_barman_server: barman.example.com  # Required if at least one server has archive_enabled enabled
+postgres_barman_rsync_enabled: False        # Optional
+postgres_barman_rsync_options: ''           # Optional
+postgres_barman_remote_user: barman         # Optional
+postgres_barman_path_prefix: '~'            # Optional, required if using rsync
 ```
 
 #### Testing
diff --git a/defaults/main.yml b/defaults/main.yml
index 5876e94..587779c 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -7,6 +7,7 @@ postgres_clusters: []
 # postgres_pgbadger_server: ~
 postgres_backup_enabled: false
 postgres_barman_rsync_enabled: false
+postgres_barman_remote_user: barman
 
 postgres_become_method: su
 #------------------------------------------------------------#
@@ -18,4 +19,3 @@ postgres_locale_system: C.UTF-8
 postgres_locale_formats: C.UTF-8
 postgres_text_search_config: pg_catalog.english
 #------------------------------------------------------------#
-
diff --git a/tasks/postgres-standby-barman.yml b/tasks/postgres-standby-barman.yml
index 65e87a6..6a94b75 100644
--- a/tasks/postgres-standby-barman.yml
+++ b/tasks/postgres-standby-barman.yml
@@ -1,4 +1,16 @@
 ---
+- name: Compute barman remote URL
+  set_fact:
+    barman_remote_url: "{{ scheme }}{{ user }}{{ server }}{{ delimiter }}{{ path }}"
+    rsync_options: "{{ postgres_barman_rsync_options | default('') }}{{ rsync_password_file }}"
+  vars:
+    scheme: "{{ postgres_barman_rsync_enabled | ternary('rsync://', '') }}"
+    user: "{{ postgres_barman_remote_user is defined | ternary(postgres_barman_remote_user + '@', '') }}"
+    server: "{{ postgres_barman_server }}"
+    delimiter: "{{ postgres_barman_rsync_enabled | ternary('', ':')}}"
+    path: "{{ postgres_barman_path_prefix | default('~') }}"
+    rsync_password_file: "{{ postgres_barman_rsync_enabled | ternary(' --password-file=/var/lib/postgresql/.rsync_pass ', '') }}"
+
 - name: Copy secondary script
   template: src=standby-clone.sh.j2 dest=/root/standby-clone-{{ postgres_version }}-{{ postgres_cluster_name }}.sh mode=0755
 
diff --git a/templates/postgresql.10.conf.j2 b/templates/postgresql.10.conf.j2
index 588020f..b07b22b 100644
--- a/templates/postgresql.10.conf.j2
+++ b/templates/postgresql.10.conf.j2
@@ -228,7 +228,7 @@ wal_log_hints = on			# also do full page writes of non-critical updates
 
 {% if postgres_archive_enabled %}
 archive_mode = on
-archive_command = 'rsync -a %p barman@{{ postgres_barman_server }}:/var/lib/barman/{{ barman_directory }}/incoming/%f'
+archive_command = 'rsync -a %p {{ postgres_barman_remote_user }}@{{ postgres_barman_server }}:/var/lib/barman/{{ barman_directory }}/incoming/%f'
 {% else %}
 archive_mode = off
 archive_command = ''
diff --git a/templates/standby-clone.sh.j2 b/templates/standby-clone.sh.j2
index 16a6930..2db44b6 100755
--- a/templates/standby-clone.sh.j2
+++ b/templates/standby-clone.sh.j2
@@ -29,11 +29,8 @@ sudo -u postgres mkdir -p /var/lib/postgresql/{{ postgres_version }}/{{ postgres
 
 echo Get previous backup from backups server
 sudo -u postgres \
-  time rsync --progress -pvia --exclude='*.conf' --exclude='server.crt' --exclude='server.key' --delete \
-{% if postgres_barman_rsync_enabled|default(false) -%}
-  --password-file=/var/lib/postgresql/.rsync_pass \
-{%- endif %}
-  {% if postgres_barman_rsync_enabled|default(false) -%}rsync://{%- endif -%}barman@{{ postgres_barman_server }}{%- if postgres_barman_rsync_enabled|default(false) -%}/backups{%- else -%}:~{%- endif -%}/$BARMAN_DATABASE/base/$BARMAN_BACKUP_VERSION/data/ \
+  time rsync --progress -pvia --exclude='*.conf' --exclude='server.crt' --exclude='server.key' --delete {{ rsync_options }} \
+  {{ barman_remote_url }}/$BARMAN_DATABASE/base/$BARMAN_BACKUP_VERSION/data/ \
   /var/lib/postgresql/{{ postgres_version }}/{{ postgres_cluster_name }}/
 
 echo Restoring .conf and server certificate