Hosting our own registry

• Deploying the registry

• We need to run a registry container

• It will store images and layers to the local filesystem
  (but you can add a config file to use S3, Swift, etc.)

• Docker requires TLS when communicating with the registry

  • unless for registries on 127.0.0.0/8 (i.e. localhost)

  • or with the Engine flag --insecure-registry

• Our strategy: publish the registry container on port 5000,
  so that it's available through 127.0.0.1:5000 on each node

Deploying the registry

• We will create a single-instance service, publishing its port on the whole cluster

• Create the registry service:

  docker service create --name registry --publish 5000:5000 registry
  

• Now try the following command; it should return {"repositories":[]}:

  curl 127.0.0.1:5000/v2/_catalog