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Docker

Formulas for working with Docker

Available states

docker

Install and run Docker daemon

Note

On Ubuntu 12.04 state will also update kernel if needeed (as mentioned in docker installation docs). You should manually reboot minions for kernel update to take affect.

You can override the default docker daemon options by setting each line in the "docker-pkg:lookup:config" pillar. This effectively writes the config in /etc/default/docker. See pillar.example

docker.containers

Pulls and runs a number of docker containers with arbitrary run options all configurable via pillars. Salt includes dockerio and dockerng states, but both depend on docker-py library, which not always implements the latest docker run options. This gives the user more control over the docker run options, but it doesn't try to implement all the other docker commands, such as build, ps, inspect, etc. It just pulls an image and runs it.

To use it, just include docker.containers in your top.sls, and configure it using pillars:

docker-containers:
  lookup:
    mycontainer:
      image: "my_image"
      cmd:
      runoptions:
        - "-e MY_ENV=warn"
        - "--log-driver=syslog"
        - "-p 2345:2345"
        - "--rm"
    myapp:
      image: "myregistry.com:5000/training/app:3.0"
      cmd:  python app.py
      runoptions:
        - "--log-driver=syslog"
        - "-v /mnt/myapp:/myapp"
        - "-p 80:80"
        - "--rm"

In the example pillar above:

  • mycontainer and myapp are the container names (ie --name option).
  • Upstart files are created for each container, so service <container_name> stop|start|status should just work
  • service <container_name> stop will wipeout the container completely (ie docker stop <container_name> + docker rm <container_name>)

docker.compose

Add support for using Docker Compose (previously fig) to define groups of containers and their relationships with one another.

docker.registry (DEPRECATED)

NEW:

Since the more generic docker-container above has been implemented, the docker-registry state can now be deprecated. The registry is just another docker image, we can use docker-container with a pillar similar to this:

docker-containers:
  lookup:
    registry:
      image: "registry:2"
      cmd:
      runoptions:
        - "-e REGISTRY_STORAGE=s3"
        - "-e REGISTRY_STORAGE_S3_REGION=us-west-1"
        - "-e REGISTRY_STORAGE_S3_BUCKET=my-bucket"
        - "-e REGISTRY_STORAGE_S3_ROOTDIRECTORY=my_registry/folder"
        - "--log-driver=syslog"
        - "-p 5000:5000"
        - "--rm"

OLD:

IMPORTANT: docker.registry will eventually be removed.

Run a Docker container to start the registry service.

If "registry:lookup:version" pillar is either the string "latest" or not specified at all, it defaults to the "latest" image tag, which at the time of this writing is still pointing to 0.9.1, even though 2.x is out for a while. It still uses the old registry pillar configuration for backwards compatibility. See the commented out block in pillar.example

If "registry:lookup:version" is set to any other version, e.g. 2, an image with that tag will be downloaded and the new pillar configuation should be used. See pillar.example.

In this case, extra docker run options can be provided in your "registry:lookup:runoptions" pillar to provide environment variables, volumes, or log configuration to the container.

By default, the storage backend used by the registry is "filesystem". Use environment variables to override that, for example to use S3 as backend storage.