Use fixed image tags for prodrigestivill/postgres-backup-local

At some point, we can drop v9.6 support and use a single variable
that holds this value.

Fixes https://github.com/spantaleev/matrix-docker-ansible-deploy/issues/2191

roles/matrix-postgres-backup/defaults/main.yml

@@ -24,18 +24,18 @@ matrix_postgres_backup_postgres_data_path: ""
 
 matrix_postgres_backup_architecture: amd64
 
-# matrix_postgres_docker_image_suffix controls whether we use Alpine-based images (`-alpine`) or the normal Debian-based images.
+# matrix_postgres_backup_docker_image_distro controls whether we use Alpine-based images (`-alpine`) or the normal Debian-based images.
 # Alpine-based Postgres images are smaller and we usually prefer them, but they don't work on ARM32 (tested on a Raspberry Pi 3 running Raspbian 10.7).
 # On ARM32, `-alpine` images fail with the following error:
 # > LOG:  startup process (PID 37) was terminated by signal 11: Segmentation fault
-matrix_postgres_backup_docker_image_suffix: "{{ '-alpine' if matrix_postgres_backup_architecture in ['amd64', 'arm64'] else '' }}"
-
-matrix_postgres_backup_docker_image_v9: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:9.6{{ matrix_postgres_backup_docker_image_suffix }}"
-matrix_postgres_backup_docker_image_v10: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:10{{ matrix_postgres_backup_docker_image_suffix }}"
-matrix_postgres_backup_docker_image_v11: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:11{{ matrix_postgres_backup_docker_image_suffix }}"
-matrix_postgres_backup_docker_image_v12: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:12{{ matrix_postgres_backup_docker_image_suffix }}"
-matrix_postgres_backup_docker_image_v13: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:13{{ matrix_postgres_backup_docker_image_suffix }}"
-matrix_postgres_backup_docker_image_v14: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:14{{ matrix_postgres_backup_docker_image_suffix }}"
+matrix_postgres_backup_docker_image_distro: "{{ 'alpine' if matrix_postgres_backup_architecture in ['amd64', 'arm64'] else 'debian' }}"
+
+matrix_postgres_backup_docker_image_v9: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:9.6-{{ matrix_postgres_backup_docker_image_distro }}-2aa03d1"
+matrix_postgres_backup_docker_image_v10: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:10-{{ matrix_postgres_backup_docker_image_distro }}-2cf00a5"
+matrix_postgres_backup_docker_image_v11: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:11-{{ matrix_postgres_backup_docker_image_distro }}-2cf00a5"
+matrix_postgres_backup_docker_image_v12: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:12-{{ matrix_postgres_backup_docker_image_distro }}-2cf00a5"
+matrix_postgres_backup_docker_image_v13: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:13-{{ matrix_postgres_backup_docker_image_distro }}-2cf00a5"
+matrix_postgres_backup_docker_image_v14: "{{ matrix_container_global_registry_prefix }}prodrigestivill/postgres-backup-local:14-{{ matrix_postgres_backup_docker_image_distro }}-2cf00a5"
 matrix_postgres_backup_docker_image_latest: "{{ matrix_postgres_backup_docker_image_v14 }}"
 
 # This variable is assigned at runtime. Overriding its value has no effect.

roles/matrix-postgres-backup/tasks/validate_config.yml

@@ -16,3 +16,14 @@
     - "matrix_postgres_backup_keep_months"
     - "matrix_postgres_backup_path"
     - "matrix_postgres_backup_databases"
+
+- name: (Deprecation) Catch and report renamed settings
+  ansible.builtin.fail:
+    msg: >-
+      Your configuration contains a variable, which now has a different name.
+      Please change your configuration to rename the variable (`{{ item.old }}` -> `{{ item.new }}`).
+  when: "item.old in vars"
+  with_items:
+    - {'old': 'matrix_postgres_backup_docker_image_suffix', 'new': 'matrix_postgres_backup_docker_image_distro'}
+
+