Update dump_databases role to match new setup (#490)

Author: Antiz96

Ansible/roles/dump_databases/README.md

@@ -1,3 +1,9 @@
 # Dump Databases
 
 Perform a dump of my databases and delete all dumps older than a week.
+
+## Variables
+
+The following variable is defined in `vars/main.yml`:
+
+- podman_user: `service` (name of the user running the podman database(s) container(s)).

Ansible/roles/dump_databases/tasks/main.yml

@@ -3,13 +3,13 @@
 
 - name: "Dump the Zabbix database"
   ansible.builtin.shell:
-    cmd: set -o pipefail && docker exec -t postgres-zabbix pg_dumpall -c -U $(cat /opt/postgres/zabbix/env/user) -l $(cat /opt/postgres/zabbix/env/database) | tee /opt/postgres/zabbix/backup/$(date +%d-%m-%Y).dump
+    cmd: machinectl shell "{{ podman_user }}"@ /bin/bash -lc "set -o pipefail && podman exec -t postgres-zabbix pg_dumpall -c -U $(cat /data/podman/volumes/postgres/zabbix/env/user) -l $(cat /data/podman/volumes/postgres/zabbix/env/database) | tee /data/podman/volumes/postgres/zabbix/backup/$(date +%d-%m-%Y).dump"
   register: dump_zabbix_database
   changed_when: true
 
 - name: "List old dumps of the Zabbix database"
   ansible.builtin.find:
-    paths: /opt/postgres/zabbix/backup
+    paths: /data/podman/volumes/postgres/zabbix/backup
     patterns: '*.dump'
     age: 1w
   register: list_old_dumps_zabbix

Ansible/roles/dump_databases/vars/main.yml

@@ -1,2 +1,4 @@
 ---
 # vars file for dump_databases
+
+podman_user: "service"