#networking

"Connection refused", "could not translate host name" or timeouts when one container calls another. Almost always a network, hostname or port mix-up.

Fix "Bind for 0.0.0.0:8080 failed: port is already allocated" and "address already in use" when starting a container.

How traffic reaches pods: ClusterIP, NodePort, LoadBalancer and headless Services, plus Ingress for host and path based HTTP(S) routing.

Makes HTTP (and other protocol) requests from the command line — for testing an API, downloading a file, or debugging a service.

Create and manage the virtual networks containers use to talk to each other by name, and understand the built-in network drivers.

ssh opens a remote shell; scp copies files over the same connection.