WIP: pipeline with several mysql-backend-versions

adds a parameter such that the docker image for the mysql-backend can be configured

.gitlab-ci.yml

@@ -121,12 +121,14 @@ test:
       - docker pull $CI_REGISTRY/caosdb/src/caosdb-deploy:$CAOSDB_TAG || CAOSDB_TAG=dev-latest ;
       - echo $CAOSDB_TAG
 
+      - MYSQL_IMAGE_NAME=mysql
+      - MYSQL_IMAGE_VERSION=8.0
       - time docker load < /image-cache/caosdb-pyint-testenv-${CI_COMMIT_REF_NAME}.tar || true
-      - time docker load < /image-cache/mariadb.tar || true
+      - time docker load < /image-cache/$MYSQL_IMAGE_NAME.tar || true
       - docker pull $CI_REGISTRY_IMAGE
       - cd .docker
         # here the server and the mysql backend docker are being started
-      - CAOSDB_TAG=$CAOSDB_TAG MYSQL_IMAGE="mysql:8.0" docker-compose  up -d
+      - CAOSDB_TAG=$CAOSDB_TAG MYSQL_IMAGE="$MYSQL_IMAGE_NAME:$MYSQL_IMAGE_VERSION" docker-compose  up -d
         # store versions of CaosDB parts
       - docker exec -u 0 -t docker_caosdb-server_1 cat /opt/caosdb/git/caosdb_pylib_commit > hash_pylib
       - docker exec -u 0 -t docker_caosdb-server_1 cat /opt/caosdb/git/caosdb_webui_commit > hash_webui
@@ -136,12 +138,12 @@ test:
         # file result
       - /bin/sh ./run.sh
       - docker logs docker_caosdb-server_1 &> ../caosdb_log.txt
-      - docker logs docker_sqldb_1 &> ../mariadb_log.txt
+      - docker logs docker_sqldb_1 &> ../${MYSQL_IMAGE_NAME}_log.txt
       - cd ..
       - MYSQL_IMAGE="mysql:8.0" docker-compose -f .docker/docker-compose.yml down
       - rc=`cat .docker/result`
-      - echo mariadb:$(docker image ls mariadb | grep mariadb | awk '{print $2}')
-      - docker save mariadb:$(docker image ls mariadb | grep mariadb | awk '{print $2}') > /image-cache/mariadb.tar || true
+      - echo ${MYSQL_IMAGE_NAME}:$(docker image ls ${MYSQL_IMAGE_NAME} | grep ${MYSQL_IMAGE_NAME} | awk '{print $2}')
+      - docker save ${MYSQL_IMAGE_NAME}:$(docker image ls ${MYSQL_IMAGE_NAME} | grep ${MYSQL_IMAGE_NAME} | awk '{print $2}') > /image-cache/${MYSQL_IMAGE_NAME}.tar || true
       - exit $rc
   dependencies: [cert]
   timeout: 3h