This tool allows you to easily deploy Docker Image(s) to Marathon.

Features:

• Has a single dependency - Go
• Validates your Marathon YAML file and converts to JSON
• Checks that your Docker images are published before deploying to Marathon
• Automatically interpolates image tags via customizable template
  • e.g. {{ .GitRevCount }}-{{ .GitRevShort }} = 93-5814f5e
• Supports multiple deployment targets/environments

Assuming:

1. you have a correctly configured $GOPATH
2. you have $GOPATH/bin in your $PATH

go get -u github.com/cloudflare/cfdeploy
cfdeploy # shows help message

Create a deploy.yaml file alongside your Marathon staging.yaml and prod.yaml files such as this:

marathon:
  host: marathon.example.com
image:
  repository: index.docker.io
  tagTemplate: "{{ .GitRevCount }}-{{ .GitRevShort }}"

environments:
  prod:
    marathon:
      file: prod.yaml
    images:
      svc:
        name: library/hello-world
  staging:
    marathon:
      file: staging.yaml
    images:
      svc:
        name: library/hello-world

Then, modify your Marathon files to have the Docker image replaced into them, e.g:

...
    container:
      type: DOCKER
      docker:
        image: {{ index .Images "svc" }}
...

Note: the key "svc" must match the key under environments.ENV.images.KEY in your deploy.yaml file.

If you have direct (unauthenticated) access to your Marathon instance:

cfdeploy -e staging

or

cfdeploy -e staging -y to skip the confirmation prompt.

If you need to specify a custom Marathon hostname or headers:

cfdeploy -e staging
    -marathon.host my-marathon.example.com \
    -marathon.curlopts '-H "OauthEmail: ..." -H "OauthAccessToken: ..." -H "OauthExpires: ..."'