Generic Docker Gitlab Runner

.gitlab-ci.yml

image: docker:latest

services:
- docker:dind

stages:
- build
- deploy

before_script:
  - echo $DOCKER_HOST
  - echo $DOCKER_DRIVER
  - echo $DOCKER_TLS_VERIFY
  - find $DOCKER_CERT_PATH -type f
  - docker info
  - docker login -u gitlab-ci-token -p $CI_JOB_TOKEN $CI_REGISTRY

build_image:
  stage: build
  script:
    - docker build --pull -t ${CI_REGISTRY_IMAGE}:${CI_COMMIT_REF_NAME} -f Dockerfile.build  .
    - docker push ${CI_REGISTRY_IMAGE}:${CI_COMMIT_REF_NAME}
  only:
    - staging
    - master

deploy_staging:
  stage: deploy
  script:
    - docker rm -f ${CI_PROJECT_PATH_SLUG}_${CI_ENVIRONMENT_SLUG} || true
    - docker run --cidfile /tmp/${CI_PROJECT_PATH_SLUG}_${CI_ENVIRONMENT_SLUG}.cid -d -p $SERVICE_PORT:80 --name ${CI_PROJECT_PATH_SLUG}_${CI_ENVIRONMENT_SLUG} ${CI_REGISTRY_IMAGE}:${CI_COMMIT_REF_NAME}
    - export CONTAINER_ID=$(cat /tmp/${CI_PROJECT_PATH_SLUG}_${CI_ENVIRONMENT_SLUG}.cid)
    - export CONTAINER_STATUS=$(docker inspect -f {{.State.Running}} $CONTAINER_ID)
    - if [ $CONTAINER_STATUS = "false" ]; then (docker logs $CONTAINER_ID; false); else true; fi
  environment:
    name: staging1
  only:
    - staging

README.md

Required environment variables in my-gitlab.tld/group/project/settings/ci_cd

• DOCKER_HOST
• DOCKER_DRIVER
• DOCKER_TLS_VERIFY
• DOCKER_CERT_PATH
• SERVICE_PORT

gitlab-runner-config.toml

[[runners]]  
  [runners.docker]
    image = "docker:latest"
    disable_cache = false
    volumes = ["/cache", "/etc/docker/certs.d:/etc/docker/certs.d", "/etc/docker/client-certs.d:/etc/docker/client-certs.d"]