backup: backup each database separately

Signed-off-by: Jakub Sokołowski <jakub@status.im>

tasks/backup.yml

@@ -9,11 +9,4 @@
     systemd_timer_timeout_sec: '{{ postgres_ha_backup_timeout }}'
     systemd_timer_after_extra: 'docker.service'
     systemd_timer_start_on_creation: false
-    systemd_timer_script_content: |
-      #!/usr/bin/env bash
-      BKP_DIR="{{ postgres_ha_cont_backup_vol }}"
-      rm -vfr "${BKP_DIR}"
-      /usr/bin/docker exec -i {{ postgres_ha_cont_name }} \
-        pg_dump -F directory -f "/backup/{{ postgres_ha_db_name }}" \
-        -U {{ postgres_ha_admin_user }} {{ postgres_ha_db_name }}
-      chmod 750 -R "${BKP_DIR}"
+    systemd_timer_script_content: '{{ lookup("template", "backup.sh.j2") }}'

templates/backup.sh.j2

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+# vim: ft=sh
+set -e
+BKP_DIR="{{ postgres_ha_cont_backup_vol }}"
+DATABASES=(
+  "{{ postgres_ha_db_name }}"
+{% for db in postgres_ha_databases %}
+  "{{ db.get("name", db.user) }}"
+{% endfor %}
+)
+for DB in "${DATABASES[@]}"; do
+  DB_DUMP_DIR="${BKP_DIR}/${DB}"
+  echo "pg_dump: ${DB} > ${DB_DUMP_DIR}"
+  [[ -d "${DB_DUMP_DIR}" ]] && rm -r "${DB_DUMP_DIR}"
+  docker exec -i {{ postgres_ha_cont_name }} \
+    pg_dump \
+      -F directory \
+      -f "/backup/${DB}" \
+      -U {{ postgres_ha_admin_user }} \
+      "${DB}"
+done
+chmod 750 -R "${BKP_DIR}"