.gitlab-ci.yml

stages:
  - build_and_push
  - deploy

variables:
  IMAGE_NAME: devops-journey
  CONTAINER_NAME: devops-journey
  PORT: "3000:3000"
  REPO_NAME: $CI_PROJECT_PATH
  REGISTRY: "registry.gitlab.com"
  SSH_HOST: $SERVER_IP
  SSH_USER: $SERVER_USERNAME
  SSH_KEY: $SSH_PRIVATE_KEY

build_and_push:
  stage: build_and_push
  image: docker:stable

  services:
    - docker:dind

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

  script:
    - docker build -t $REGISTRY/$REPO_NAME/$IMAGE_NAME:$CI_COMMIT_SHA .
    - docker push $REGISTRY/$REPO_NAME/$IMAGE_NAME:$CI_COMMIT_SHA
    
deploy:
  stage: deploy
  image: alpine:latest

  before_script:
    - apk add --update --no-cache openssh-client

  script:
    - mkdir -p ~/.ssh
    - echo "$SSH_PRIVATE_KEY" > ~/.ssh/id_rsa
    - chmod 600 ~/.ssh/id_rsa
    - ssh-keyscan -H $SSH_HOST >> ~/.ssh/known_hosts 
    - ssh -i ~/.ssh/id_rsa -o StrictHostKeyChecking=no $SSH_USER@$SSH_HOST "echo "$CI_JOB_TOKEN" | docker login -u gitlab-ci-token --password-stdin $CI_REGISTRY"
    - ssh -i ~/.ssh/id_rsa -o StrictHostKeyChecking=no $SSH_USER@$SSH_HOST "docker pull $REGISTRY/$REPO_NAME/$IMAGE_NAME:$CI_COMMIT_SHA"
    - ssh -i ~/.ssh/id_rsa -o StrictHostKeyChecking=no $SSH_USER@$SSH_HOST "docker stop $CONTAINER_NAME || true"
    - ssh -i ~/.ssh/id_rsa -o StrictHostKeyChecking=no $SSH_USER@$SSH_HOST "docker rm $CONTAINER_NAME || true"
    - ssh -i ~/.ssh/id_rsa -o StrictHostKeyChecking=no $SSH_USER@$SSH_HOST "docker run -d --name $CONTAINER_NAME -p $PORT $REGISTRY/$REPO_NAME/$IMAGE_NAME:$CI_COMMIT_SHA"