Gitlab CI/CD docker deployment

Source

(317) GitLab CI CD Tutorial for Beginners [Crash Course] - YouTube

.gitlab-ci.yml · main · Nana Janashia / gitlab-cicd-crash-course · GitLab

Main idea:

1. .gitlab-ci.yml will host the classical 3 stages which are

    a. test

    b. build

    c. deploy

2. build will use a docker image and service to build and push the docker image to docker hub

3. deploy will ssh to the target machine, kill existing docker image, run the specific docker image

variables:
  IMAGE_NAME: nanajanashia/demo-app
  IMAGE_TAG: python-app-1.0

stages:
  - test
  - build
  - deploy

run_tests:
  stage: test
  image: python:3.9-slim-buster
  before_script:
    - apt-get update && apt-get install make
  script:
    - make test


build_image:
  stage: build
  image: docker:20.10.16
  services:
    - docker:20.10.16-dind
  variables:
    DOCKER_TLS_CERTDIR: "/certs"
  before_script:
    - docker login -u $REGISTRY_USER -p $REGISTRY_PASS
  script:
    - docker build -t $IMAGE_NAME:$IMAGE_TAG .
    - docker push $IMAGE_NAME:$IMAGE_TAG


deploy:
  stage: deploy
  before_script:
    - chmod 400 $SSH_KEY
  script:
    - ssh -o StrictHostKeyChecking=no -i $SSH_KEY root@161.35.223.117 "
        docker login -u $REGISTRY_USER -p $REGISTRY_PASS &&
        docker ps -aq | xargs docker stop | xargs docker rm &&
        docker run -d -p 5000:5000 $IMAGE_NAME:$IMAGE_TAG"