multi-architecture docker pipeline in Drone CI

.drone.yml

---

kind: pipeline
type: docker
name: linux-amd64

trigger:
  branch:
    - myapp
  event:
    - push
    - custom

platform:
  arch: amd64
  os: linux

clone:
  skip_verify: yes

steps:
  - name: build
    image: docker:20-dind
    volumes:
      - name: dockersock
        path: /var/run
    commands:
      - sleep 5 # give docker enough time to start
      - docker build --network host -t registry.local:5000/myapp:${DRONE_COMMIT_SHA:0:8}-linux-amd64 .

  - name: push
    image: docker:20-dind
    volumes:
      - name: dockersock
        path: /var/run
    commands:
      - docker push registry.local:5000/myapp:${DRONE_COMMIT_SHA:0:8}-linux-amd64

services:
  - name: docker
    image: docker:20-dind
    privileged: true
    entrypoint: 
      - "dockerd"
    volumes:
      - name: dockersock
        path: /var/run
    command: 
      - "--host=unix:///var/run/docker.sock"
      - "--insecure-registry=registry.local:5000"

volumes:
  - name: dockersock
    temp: {}

---

kind: pipeline
type: docker
name: linux-arm64

trigger:
  branch:
    - myapp
  event:
    - push
    - custom

platform:
  arch: arm64
  os: linux

clone:
  skip_verify: yes

steps:
  - name: build
    image: docker:20-dind
    volumes:
      - name: dockersock
        path: /var/run
    commands:
      - sleep 5 # give docker enough time to start
      - docker build --network host -t registry.local:5000/${DRONE_COMMIT_BRANCH}:${DRONE_COMMIT_SHA:0:8}-linux-arm64 .

  - name: push
    image: docker:20-dind
    volumes:
      - name: dockersock
        path: /var/run
    commands:
      - docker push registry.local:5000/${DRONE_COMMIT_BRANCH}:${DRONE_COMMIT_SHA:0:8}-linux-arm64

services:
  - name: docker
    image: docker:20-dind
    privileged: true
    entrypoint: 
      - "dockerd"
    volumes:
      - name: dockersock
        path: /var/run
    command: 
      - "--host=unix:///var/run/docker.sock"
      - "--insecure-registry=registry.local:5000"

volumes:
  - name: dockersock
    temp: {}

---

kind: pipeline
type: docker
name: manifest

trigger:
  branch:
    - myapp
  event:
    - push
    - custom

clone:
  skip_verify: yes

steps:
  - name: create && push
    image: docker:20-dind
    volumes:
      - name: dockersock
        path: /var/run
    commands:
      - sleep 5 # give docker enough time to start
      - docker manifest create --insecure registry.local:5000/${DRONE_COMMIT_BRANCH}:${DRONE_COMMIT_SHA:0:8} --amend registry.local:5000/${DRONE_COMMIT_BRANCH}:${DRONE_COMMIT_SHA:0:8}-linux-amd64 --amend registry.local:5000/${DRONE_COMMIT_BRANCH}:${DRONE_COMMIT_SHA:0:8}-linux-arm64
      - docker manifest push --insecure registry.local:5000/${DRONE_COMMIT_BRANCH}:${DRONE_COMMIT_SHA:0:8}

services:
  - name: docker
    image: docker:20-dind
    privileged: true
    entrypoint: 
      - "dockerd"
    volumes:
      - name: dockersock
        path: /var/run
    command: 
      - "--experimental"
      - "--host=unix:///var/run/docker.sock"
      - "--insecure-registry=registry.local:5000"

volumes:
  - name: dockersock
    temp: {}

depends_on:
  - linux-amd64
  - linux-arm64