Gitlab CI/CD, Bitbucket, Docker Swarm

.gitlab-ci.yml

image: docker:19.03.5

services:
  - docker:19.03.5-dind

before_script:
  - docker info
  - docker login -u $CI_REGISTRY_USER -p $CI_REGISTRY_PASSWORD $CI_REGISTRY

stages:
  - build
  - test
  - release
  - deploy

variables:
  # DOCKER_HOST: tcp://docker:2375
  DOCKER_TLS_CERTDIR: "/certs"
  DOCKER_DRIVER: overlay2
  CONTAINER_TEST_IMAGE: $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA
  CONTAINER_RELEASE_IMAGE: $CI_REGISTRY_IMAGE:latest
  CONTAINER_DEV_IMAGE: $CI_REGISTRY_IMAGE:dev

build:
  stage: build
  script:
    - echo "$SSH_PRIVATE_KEY"
    - docker pull $CI_REGISTRY_IMAGE:latest || true
    - docker build --cache-from $CI_REGISTRY_IMAGE:latest --tag $CONTAINER_TEST_IMAGE .
    - docker push $CONTAINER_TEST_IMAGE
  only:
    - develop

unit_tests:
  stage: test
  script:
    - docker pull $CONTAINER_TEST_IMAGE
    - docker run $CONTAINER_TEST_IMAGE echo "test done"
  only:
    - develop

release-image-dev:
  stage: release
  script:
    - docker pull $CONTAINER_TEST_IMAGE
    - docker tag $CONTAINER_TEST_IMAGE $CONTAINER_DEV_IMAGE
    - docker push $CONTAINER_DEV_IMAGE
  only:
    - develop

deploy_staging:
  stage: deploy
  before_script:
    - 'which ssh-agent || ( apt-get update -y && apt-get install openssh-client -y )'
    - eval $(ssh-agent -s)
    - echo "$SSH_PRIVATE_KEY" | tr -d '\r' | ssh-add -
    - mkdir -p ~/.ssh
    - echo "$SSH_KNOWN_HOSTS" > ~/.ssh/known_hosts
    - chmod 700 ~/.ssh
  script:
    - |
      ssh $SSH_DEPLOY_USER@$SSH_DEPLOY_HOST /bin/bash -s << EOT
      echo "Deploy from Gitlab "Deploy from Gitlab CI"
      cd $CI_CONFIG_DIR
      docker stack deploy $STACK_NAME -c ./stack.yml --with-registry-auth
      EOT
  only:
    - develop  

deploy_prod:
  stage: deploy
  script:
    - echo "Deploy to production server"
  environment:
    name: production
  only:
    - master
  when: manual

README.md

Gitlab CI/CD deploy to docker swarm

Steps

• Clone Bitbucket repository to Gitlab
• Setup repository mirroring on Gitlab point ot Bitbucket
• Add webhook in Bitbucket: https://gitlab.com/api/v4/projects/{{namespaces}}%2F{{project_name}}mirror/pull?private_token={{gitlab_token}}

Can you show stack.yml please?