Hands-On Microservices with Kubernetes

Telepresence

Telepresence (https://www.telepresence.io/) is a special tool. It lets you run a service locally as if it's running inside your Kubernetes cluster. Why is that interesting? Consider the smoke test we just implemented. If we detect a failure, we would like to do the following three things:

• Find the root cause.
• Fix it.
• Verify that the fix works.

Since we discovered the failure only when running the smoke test on our Kubernetes cluster, it is probably a failure that is not detected by our local unit tests. The normal way to find the root cause (other than reviewing the code offline) is to add a bunch of logging statements, add experimental debug code, comment out irrelevant sections and deploy the modified code, rerun the smoke ...