Merge branch 'develop' into 'master'

Develop

See merge request !1

.gitlab-ci.yml

+stages:
+- build
+- test
+- release
+
 variables:
-  IMAGE_TAG: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+  CONTAINER_TEST_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME
+  CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest
+  CONTAINER_ID: '$CI_JOB_NAME-$CI_PROJECT_NAME-Pipeline$CI_PIPELINE_ID-Job$CI_JOB_ID'
+
 
 before_script:
   - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY
 
 build:
   tags:
-    - docker
+    - docker-builder
   stage: build
   script:
-    - docker build -t $IMAGE_TAG .
-    - docker push $IMAGE_TAG
\ No newline at end of file
+    - docker build --pull -t $CONTAINER_TEST_IMAGE .
+    - docker push $CONTAINER_TEST_IMAGE
+
+test:
+  tags:
+    - docker-tester
+  stage: test
+  script:
+    - docker pull $CONTAINER_TEST_IMAGE
+    
+    # Test running the container.
+    - docker run --name $CONTAINER_ID -d --privileged -v /sys/fs/cgroup:/sys/fs/cgroup:ro $CONTAINER_TEST_IMAGE /lib/systemd/systemd
+    
+    # Verify Ansible is available in the container.
+    - docker exec --tty $CONTAINER_ID env TERM=xterm ansible --version
+    
+    # Remove test-container
+    - docker rm -f $CONTAINER_ID
+
+release-image:
+  tags:
+    - docker-builder
+  stage: release
+  script:
+    - docker pull $CONTAINER_TEST_IMAGE
+    - docker tag $CONTAINER_TEST_IMAGE $CONTAINER_RELEASE_IMAGE
+    - docker push $CONTAINER_RELEASE_IMAGE
+  only:
+    - master
+