Grafana Backend: Establish a database version support policy. (#54374)

As stated in the documentation, Grafana will support the versions of our backend database options that are supported by their projects at the time that a Grafana release is issued.

devenv/docker/blocks/mysql/.env

@@ -1 +1 @@
-mysql_version=5.6
+mysql_version=5.7

devenv/docker/blocks/mysql_tests/.env

@@ -1 +1 @@
-mysql_version=5.6
+mysql_version=5.7

devenv/docker/blocks/mysql_tests/Dockerfile

@@ -1,4 +1,4 @@
-ARG mysql_version=5.6
+ARG mysql_version=5.7
 FROM mysql:${mysql_version}
 ADD setup.sql /docker-entrypoint-initdb.d
 RUN chown -R mysql:mysql /docker-entrypoint-initdb.d/

devenv/docker/blocks/mysql_tests/docker-compose.yaml

@@ -3,6 +3,7 @@
       context: docker/blocks/mysql_tests
       args:
         - mysql_version=${mysql_version}
+    platform: linux/amd64
     environment:
       MYSQL_ROOT_PASSWORD: rootpass
       MYSQL_DATABASE: grafana_tests

devenv/docker/blocks/postgres/.env

@@ -1 +1 @@
-postgres_version=9.3
+postgres_version=10.15

devenv/docker/blocks/postgres_tests/.env

@@ -1 +1 @@
-postgres_version=9.3
+postgres_version=10.15

devenv/docker/blocks/postgres_tests/Dockerfile

@@ -1,4 +1,4 @@
-ARG postgres_version=9.3
+ARG postgres_version=10.15
 FROM postgres:${postgres_version}
 ADD setup.sql /docker-entrypoint-initdb.d
 RUN chown -R postgres:postgres /docker-entrypoint-initdb.d/

devenv/docker/ha_test/docker-compose.yaml

@@ -16,7 +16,7 @@ services:
         tag: nginx
 
   db:
-    image: mysql:5.6
+    image: mysql:5.7
     environment:
       MYSQL_ROOT_PASSWORD: rootpass
       MYSQL_DATABASE: grafana
@@ -41,7 +41,7 @@ services:
         condition: service_healthy
 
   # db:
-  #   image: postgres:9.3
+  #   image: postgres:10.15
   #   environment:
   #     POSTGRES_DATABASE: grafana
   #     POSTGRES_USER: grafana