In this recipe, you learned how to access logs and debug service problems locally.

In the Debugging services locally using Telepresence recipe, in Step 7, we ran the telepresence --swap-deployment command to replace the service with a local web service.

Telepresence functions by building a two-way network proxy. The --swap-deployment flag is used to define the pod that will be replaced with a proxy pod on the cluster. Telepresence starts a vpn-tcp process to send all requests to the locally exposed port, that is, 8000. The --run python3 -m http.server 8000 & flag tells Telepresence to run an http.server using Python 3 in the background via port 8000.

In the same recipe, in Step 9, the fg command is used to move the background service to the foreground. When you exit the service, the old pod will be restored. You can learn about how Telepresence functions by looking at the How Telepresence works link in the See also section.