Add support for Postgres v12

CHANGELOG.md

@@ -1,3 +1,12 @@
+# 2019-10-04
+
+## Postgres 12 support
+
+The playbook now installs [Postgres 12](https://www.postgresql.org/about/news/1976/) by default.
+
+If you have have an existing setup, it's likely running on an older Postgres version (9.x, 10.x or 11.x). You can easily upgrade by following the [upgrading PostgreSQL guide](docs/maintenance-postgres.md#upgrading-postgresql).
+
+
 # 2019-10-03
 
 ## Synapse 1.4.0

docs/maintenance-postgres.md

@@ -42,7 +42,7 @@ docker run \
 --rm \
 --network matrix \
 --env-file=/matrix/postgres/env-postgres-psql \
-postgres:11.1-alpine \
+postgres:12.0-alpine \
 pg_dump -h matrix-postgres \
 | gzip -c \
 > /postgres.sql.gz

roles/matrix-postgres/defaults/main.yml

@@ -11,7 +11,8 @@ matrix_postgres_data_path: "{{ matrix_postgres_base_path }}/data"
 matrix_postgres_docker_image_v9: "postgres:9.6.15-alpine"
 matrix_postgres_docker_image_v10: "postgres:10.10-alpine"
 matrix_postgres_docker_image_v11: "postgres:11.5-alpine"
-matrix_postgres_docker_image_latest: "{{ matrix_postgres_docker_image_v11 }}"
+matrix_postgres_docker_image_v12: "postgres:12.0-alpine"
+matrix_postgres_docker_image_latest: "{{ matrix_postgres_docker_image_v12 }}"
 
 # This variable is assigned at runtime. Overriding its value has no effect.
 matrix_postgres_docker_image_to_use: '{{ matrix_postgres_docker_image_latest }}'

roles/matrix-postgres/tasks/util/detect_existing_postgres_version.yml

@@ -44,3 +44,8 @@
   set_fact:
     matrix_postgres_detected_version_corresponding_docker_image: "{{ matrix_postgres_docker_image_v10 }}"
   when: "matrix_postgres_detected_version == '10' or matrix_postgres_detected_version.startswith('10.')"
+
+- name: Determine corresponding Docker image to detected version (use 11.x, if detected)
+  set_fact:
+    matrix_postgres_detected_version_corresponding_docker_image: "{{ matrix_postgres_docker_image_v11 }}"
+  when: "matrix_postgres_detected_version == '11' or matrix_postgres_detected_version.startswith('11.')"