Expose services on a Docker Swarm cluster using Traefik and Redis

Swarm-expose allows you to expose your services running on a docker swarm cluster without needing to give Treafik access to the docker socket. You can have a single Traefik instance load balancing requests between swarm nodes and the ingress network routes the requests to the services.

Usage:

Deploy the stack from stack.yml.

IMPORTANT: Change the value of the environment variable DEFAULT_DOMAIN

Start Traefik using the deployed Redis:

traefik --providers.redis.endpoints=<docker_node>:6379

Create a service, publish its port and add the label expose=1:

docker service create --name nginx --publish 80 --label expose=1 nginx

The service will be exposed as http://${service.name}.${DEFAULT_DOMAIN}/

To change the host for the service, add the label expose.host=my-host

docker service update nginx --label-add expose.host=my-host

The service will now be exposed as http://my-host

If your service publishes more than one port, swarm-expose will get the first, unless you tell which one to expose using the label expose.port

docker service update nginx --publish-add 443 --label-add expose.port=443