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CI/CD with Jenkins and Docker - DevOps Meetup Day Thailand

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CI/CD with Jenkins and Docker - DevOps Meetup Day Thailand

  1. 1. CI/CD with Jenkins and Docker
  2. 2. Hello! Teerapat Khunpech @engineerball 2
  3. 3. DevOps keys
  4. 4. What is Continuous integration ▷ A development methodology ▷ Verified by builds ○ Unit test ○ Functional test ○ Integration test ▷ Every commit trigger a build
  5. 5. What is Continuous delivery ▷ Continuous delivery/deployment ▷ Every commit that passed a build could be deploy to production ▷ Automation deploy
  6. 6. What is Jenkins? ▷ CI/CD application ▷ Easy installation ▷ Rich plugin ▷ Distributed build
  7. 7. Jenkins Workflow
  8. 8. What is Docker? Open Source engine for containers Build, ship, run your application within containers Docker enables separation of concerns
  9. 9. How can you use Jenkins & Docker together? Run Jenkins Master & Slave in Docker Build, Test & Deploy Docker Image from Jenkins
  10. 10. Example CI/CD with Docker
  11. 11. CI/CD Workflow
  12. 12. Tools ▷ SCM: Github ▷ CI/CD: Jenkins 2.0 ▷ Platform: docker ▷ Container Orchestration: docker swarm ▷ Service Discovery Tool: Consul
  13. 13. Setup
  14. 14. Node0 set up ▷ Start the Consul container $ docker run -d -p 8500:8500 -h consul --name consul progrium/consul -server -bootstrap Unable to find image 'progrium/consul:latest' locally latest: Pulling from progrium/consul 3b4d28ce80e4: Pull complete e5ab901dcf2d: Pull complete <snip>
  15. 15. Node1-3 set up ▷ Edit DOCKER_OPTS daemon (/etc/default/docker) DOCKER_OPTS="-H tcp:// -H unix:///var/run/docker.sock --cluster-store=consul:// --cluster-advertise=ens4:2375"
  16. 16. Install Docker Swarm Cluster ▷ Node0: Create Swarm Master # Create Swarm Master $ export TOKEN=$(docker run --rm swarm create) $ docker run -d -p 3375:2375 swarm manage token://$TOKEN # Join Swarm Node $ docker run -d swarm join --addr= token://$TOKEN $ docker run -d swarm join --addr= token://$TOKEN $ docker run -d swarm join --addr= token://$TOKEN
  17. 17. Jenkins Setup ▷ Build Docker image inside a docker container ▷ SSH Node with access to docker engine
  18. 18. Jenkins Setup ▷ Node0: Install Jenkins Master $ docker -H unix:///var/run/docker.sock run -d -p 8080:8080 jenkins
  19. 19. Jenkins Setup ▷ Node0: Configure Jenkins Master ○ Configure Global Security ○ Install plugins ■ Github plugin ■ CloudBees Docker Build and Publish ○ Create Jenkins Slave node (node1)
  20. 20. Example Voting App ▷ A Python webapp which lets you vote between two options ▷ A Redis queue which collects new votes ▷ A Java worker which consumes votes and stores them in… ▷ A Postgres database backed by a Docker volume ▷ A Node.js webapp which shows the results of the voting in real time
  21. 21. Voting App Dockerfile # Using official python runtime base image FROM python:2.7 # Set the application directory WORKDIR /app # Install our requirements.txt ADD requirements.txt /app/requirements.txt RUN pip install -r requirements.txt # Copy our code from the current folder to /app inside the container ADD . /app # Make port 5000 available for links and/or publish EXPOSE 80 # Define our command to be run when launching the container CMD ["python", ""]
  22. 22. Result App Dockerfile FROM node:0.10 RUN mkdir /app WORKDIR /app ADD package.json /app/package.json RUN npm install && npm ls RUN mv /app/node_modules /node_modules ADD . /app ENV PORT 80 EXPOSE 80 CMD ["node", "server.js"]
  23. 23. Worker Dockerfile FROM java:7 RUN apt-get update -qq && apt-get install -y maven && apt-get clean WORKDIR /code ADD pom.xml /code/pom.xml RUN ["mvn", "dependency:resolve"] RUN ["mvn", "verify"] # Adding source, compile and package into a fat jar ADD src /code/src RUN ["mvn", "package"] CMD ["/usr/lib/jvm/java-7-openjdk-amd64/bin/java", "-jar", "target/worker-jar-with-dependencies.jar"]
  24. 24. Github Webhook Setup ▷ Automatically build job when pushes are made to Github
  25. 25. The Build Jobs ▷ Create 3 Jenkins jobs ○ build-voting-app ○ build-worker ○ build-result-app
  26. 26. The Build Jobs
  27. 27. The Build Jobs
  28. 28. The Build Jobs
  29. 29. The Deploy Job ▷ Create a Jenkins jobs ○ Build section, Execute shell export DOCKER_HOST= export DTR="" docker-compose -f vote-apps/docker-compose.yml stop voting-app result-app worker docker-compose -f vote-apps/docker-compose.yml rm -f docker-compose -f vote-apps/docker-compose.yml pull voting-app result-app worker docker-compose -f vote-apps/docker-compose.yml up -d
  30. 30. The Deploy Job docker-compose.yml version: "2" services: voting-app: build: ./voting-app/. networks: - front-tier - back-tier result-app: build: ./result-app/. networks: - front-tier - back-tier worker: image: manomarks/worker networks: - back-tier redis: image: redis:alpine container_name: redis networks: - back-tier db: image: postgres:9.4 container_name: db volumes: - "db-data:/var/lib/postgresql/data" networks: - back-tier volumes: db-data: networks: front-tier: back-tier:
  31. 31. Deploying The App ▷ Clone SCM, edit and push to SCM
  32. 32. Deploying The App root@node2:~# docker ps -a CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 0100cf6b0c14 engineerball/result-app:47d362f35a115f2098c80a11e161eef626e1dbcb "node server.js" 2 hours ago Up 2 hours>80/tcp voteapps_result-app_1 296eee196e4e engineerball/voting-app:47d362f35a115f2098c80a11e161eef626e1dbcb "python" 2 hours ago Up 2 hours>80/tcp voteapps_voting-app_1 40f8d8aec4ca engineerball/worker:47d362f35a115f2098c80a11e161eef626e1dbcb "/usr/lib/jvm/java-7-" 2 hours ago Up 2 hours voteapps_worker_1 44da08df3d5c postgres:9.4 "/docker-entrypoint.s" 2 hours ago Up 2 hours 5432/tcp voteapps_db_1 fa10362631cb redis "" 2 hours ago Up 2 hours 6379/tcp voteapps_redis_1
  33. 33. The Voting App
  34. 34. The Voting Result
  35. 35. DEMO
  36. 36. In Conclusion
  37. 37. In Conclusion ▷ Automate is the key ▷ Docker simplifies environment problems ▷ Jenkins is ready for Docker and CD