Add Dockerfile

Add the Dockerfile used to build docker image for pipeline. Will add automatically build process in the pipeline in the future.

.gitlab-ci.yml

@@ -24,10 +24,12 @@ variables:
   GIT_AUTHOR_EMAIL: "gitlab@runner"
   NUM_SERVER_TO_KEEP: 5
   NUM_IMAGE_TO_KEEP: 30
+  PACKER_VER: 1.8.3
   PKR_VAR_root_ssh_key: "ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBAFqqWgmYpEaGtHBeTu27ntVJpYjwq/x5aBefrvfhk8Z9lE3cuZ26vJ9n/9tGE4Zn2Pew1mpZgi6PzfJ3vMt8yA= root@master"
   DEV_KEY: "ssh-rsa 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 louistw@uab.edu"
 
 stages:
+  - pre-build
   - build
   - test
   - deploy
@@ -37,6 +39,34 @@ workflow:
     - if: $CI_PIPELINE_SOURCE == 'merge_request_event'
     - if: $CI_PIPELINE_SOURCE == 'schedule'
 
+build_docker_image:
+  stage: pre-build
+  services:
+    - docker:20.10.16-dind
+  tags:
+    - dind
+  before_script:
+    - export BUILD_DATE=$(TZ=America/Chicago date +%Y%m%d)
+    - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY
+  script:
+    - |
+      wget https://releases.hashicorp.com/packer/$PACKER_VER/packer_${PACKER_VER}_linux_amd64.zip -O packer.zip
+      unzip packer.zip
+      rm packer.zip
+    - docker build -t $CI_REGISTRY_IMAGE:$BUILD_DATE -t $CI_REGISTRY_IMAGE:latest .
+    - >
+      docker run --rm $CI_REGISTRY_IMAGE bash -c
+      'ansible --version &&
+      openstack --version &&
+      packer version &&
+      s3cmd --version'
+    - docker push --all-tags $CI_REGISTRY_IMAGE
+  rules:
+    - if: $CI_PIPELINE_SOURCE == "merge_request_event"
+      changes:
+        - Dockerfile
+      allow_failure: true
+
 build_image:
   image: $CI_REGISTRY_IMAGE:latest
   stage: build