Private Docker Registry with Swarm

• Works the same way as localhost
• Because of Routing Mesh, all nodes can see 127.0.0.1:5000
• Remember to decide how to store images (volume driver)
• NOTE: All nodes must be able to access the images
• ProTip: Use a hosted SaaS registry if possible

How to do it

~> docker service create --name registry -p 5000:5000 registry
ocs4bnqw1crnbivjh74gy9lv8

~> docker service ps registry
ID                  NAME                IMAGE               NODE      DESIRED STATE       CURRENT STATE            ERROR               PORTS
3bk9yp618nnb        registry.1          registry:latest     manager1      Running             Running 10 seconds ago

• Re-tag an existing image and push it to your new registry

docker tag hello-world 127.0.0.1:5000/hello-world
docker tag nginx 127.0.0.1:5000/nginx

docker push 127.0.0.1:5000/hello-world
docker push 127.0.0.1:5000/nginx

• Remove that image from local cache and pull it from new registry

docker image rm hello-world
docker image rm nginx

docker image rm 127.0.0.1:5000/hello-world
docker image rm 127.0.0.1:5000/nginx

docker pull 127.0.0.1:5000/hello-world
docker pull 127.0.0.1:5000/nginx

• We can visit catalog on hostname:5000/v2/_catalog

{
    "repositories": [
        "hello-world",
        "nginx"
    ]
}