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pipe pipe

Docker Deploy

Pipeline

name: docker-deploy
description: "Build, tag, and push a Docker image then deploy to remote server"
steps:
  - id: get-version
    run: "git describe --tags --always"


  - id: lint
    run:
      - "hadolint Dockerfile"
      - "docker compose config --quiet"


  - id: build
    run: "docker build -t myapp:$PIPE_GET_VERSION ."
    depends_on: "lint"


  - id: push
    run: |
      docker tag myapp:$PIPE_GET_VERSION registry.example.com/myapp:$PIPE_GET_VERSION
      docker push registry.example.com/myapp:$PIPE_GET_VERSION
    depends_on: "build"


  - id: deploy
    run: "ssh deploy@prod 'docker pull registry.example.com/myapp:$PIPE_GET_VERSION && docker service update --image registry.example.com/myapp:$PIPE_GET_VERSION myapp'"
    depends_on: "push"
    retry: 2

Concepts demonstrated

  • Output passing — get-version output feeds into build, push, and deploy via $PIPE_GET_VERSION
  • Parallel commands — lint runs hadolint and docker compose config concurrently
  • Dependencies — build → push → deploy chain via depends_on
  • Implicit edges — build depends on get-version through $PIPE_GET_VERSION reference
  • Retry — deploy retries up to 2 times on failure