Only configure postgres snapshots with rsnapshot

postgres/tasks/main.yml

@@ -36,7 +36,10 @@
     state: started
     enabled: true
 
-- name: ensure we have our postgres backup script
+- name: configure snapshots
+  when: '"servers_rsnapshot" in group_names'
+  block:
+    - name: ensure we have our postgres backup script
       copy:
         src: "pgbackup{{ '-bullseye' if ansible_distribution_major_version|int(default=99) > 10 else '' }}.sh"
         dest: /usr/local/bin/pgbackup.sh
@@ -44,7 +47,7 @@
         group: root
         mode: '0755'
 
-- name: ensure we have our rsnapshot config
+    - name: ensure we have our rsnapshot config
       copy:
         src: rsnapshot.conf
         dest: /etc/rsnapshot.d/postgres.conf
@@ -52,7 +55,7 @@
         group: root
         mode: '0644'
 
-- name: remove obsolete crontab
+    - name: remove obsolete crontab
       file:
         path: /etc/cron.d/postgres-snapshot
         state: absent