Multi-Stage Docker Worker

This project is a spin on the Taskcluster Docker worker. The key difference is that the Multi-Stage worker supports having multiple steps which are executed in the same 'pod'. Each pod is run in a dedicated Docker instance (using docker-in-docker), where they can share volumes without them having to be transferred over the network.

Usage

The worker can run regular tasks from Taskcluster with its own payload format.

Task Example

provisionerId: shared
workerType: multistage-docker
created: {$fromNow: ''}
deadline: {$fromNow: '3 hours'}
expires: {$fromNow: '10 days'}
payload:
  steps:
    - image: my/ci/bootstrap
    - image: bitnami/git
      args: ["clone", "https://github.com/my/repo", "."]
    - image: docker
      args: ["build", ".", "-t", "my/image/name"]
    - image: docker
      args: ["push", "my/image/name"]
metadata:
  name: example-task
  description: An **example** task
  owner: name@example.com

Deployment

The worker is compatible with worker-runner using the generic-worker implementation. It has a few configuration variables but the most common ones match generic-worker:

worker-runner Config Example

provider:
  providerType: google  
worker:
  implementation: generic-worker
  path: ./local/multistage-docker-worker
  configPath: local/generic-worker-config.yml
workerConfig:
  wstAudience: taskcluster
  wstServerURL: https://my.taskcluster
  shutdownOnIdleSecs: 30

License

This project is licensed under the Apache 2.0 license.