Build mysql test image for CI

Dockerfile.mysql

@@ -0,0 +1,23 @@
+ARG MYSQL_VERSION
+
+FROM mysql:${MYSQL_VERSION}-debian
+# Make all apt-get commands non-interactive. Setting this as an ARG will apply to the entire
+# build phase, but not leak into the final image and run phase.
+ARG DEBIAN_FRONTEND=noninteractive
+
+# MySQL 5.7 has been EOL'd and is no longer being built by the official mysql docker maintainers:
+# https://github.com/docker-library/mysql/pull/1019
+# Copy the gpg key from the latest MySQL image.
+COPY --from=mysql:8.0-debian /etc/apt/keyrings/mysql.gpg /etc/apt/keyrings/mysql.gpg
+
+# Install the MySQL test package so that we can get test plugins.
+# https://github.com/docker-library/mysql/issues/1040
+RUN set -eux \
+    # Install MySQL test package.
+    && apt-get update \
+    && apt-get install --yes mysql-community-test
+
+# This is the final stage inwhich we copy the plugins from the test stage. Doing it this way allows
+# us to not have to install the test package in the final image since we only need the plugins.
+FROM mysql:${MYSQL_VERSION}-debian
+COPY --from=0 /usr/lib/mysql/plugin/ /usr/lib/mysql/plugin/

docker-compose.yml

@@ -1,21 +1,27 @@
 services:
   db:
     platform: linux/x86_64
-    image: "mysql:${MYSQL_VERSION}-debian"
+    image: "ghcr.io/trilogy-libraries/trilogy/ci-mysql:${MYSQL_VERSION}-debian"
     command:
-    - --sql_mode=NO_ENGINE_SUBSTITUTION
-    - --server-id=1
-    - --gtid-mode=ON
-    - --enforce-gtid-consistency=ON
-    - --log-bin=mysql-bin.log
+      - --sql_mode=NO_ENGINE_SUBSTITUTION
+      - --server-id=1
+      - --gtid-mode=ON
+      - --enforce-gtid-consistency=ON
+      - --log-bin=mysql-bin.log
+    build:
+      context: .
+      dockerfile: Dockerfile.mysql
+      args:
+        - MYSQL_VERSION=${MYSQL_VERSION}
+      cache_from:
+        - ghcr.io/trilogy-libraries/trilogy/ci-mysql:${MYSQL_VERSION}-debian
     environment:
       MYSQL_ALLOW_EMPTY_PASSWORD: 1
       MYSQL_DATABASE: test
       MYSQL_HOST: db.local
     volumes:
       - "./tmp/mysql-certs:/mysql-certs"
       - ./docker-entrypoint-initdb.d:/docker-entrypoint-initdb.d
-      - ./test/auth_plugins/${MYSQL_VERSION}/auth_test_plugin.so:/usr/lib/mysql/plugin/auth_test_plugin.so
   app:
     image: ghcr.io/trilogy-libraries/trilogy/ci-app:distro-${DISTRIBUTION_SLUG}-ruby-${RUBY_VERSION}-mysql-${MYSQL_VERSION}
     privileged: true

script/cibuild

@@ -58,7 +58,7 @@ mkdir tmp/mysql-certs
 chmod 777 tmp/mysql-certs
 
 docker compose rm --stop --force --volumes
-output_fold "Pull cache image..." docker compose pull app || true
+output_fold "Pull cache image..." docker compose pull app db || true
 output_fold "Bootstrapping container..." docker compose build
 output_fold "Running tests..." docker compose run --rm app
-output_fold "Pushing cache image..." docker compose push app || true # Don't fail if push fails
+output_fold "Pushing cache image..." docker compose push app db || true # Don't fail if push fails