Traefik is popular with Docker's Swarm Mode users because it's lightweight, handles HTTP and HTTPS requests, and most importantly, it can dynamically adjust to changes in your running swarm services. You can publish a single port that's your reverse proxy, and it automatically forwards the request to the appropriate container. That's where reverse proxies like Traefik come into play. Publishing the port for your application across all nodes in the swarm makes it easy to connect to your application, but you are left managing which application is published on which port. Docker has solved that with it's ingress network that publishes the port for your application across every node and then automatically routes your request to a container in the swarm providing that service, even if it's on another node. With the application being distributed across the workers, you have a new challenge of how to know which node to contact to reach your application. Docker provides that high availability with a quorum of managers and multiple instances of the application container distributed across the workers. Managing Multiple Microservices with Traefik in Docker Swarmĭocker's Swarm Mode is a great way to run web applications in a highly available distributed environment.
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