A Practical Guide to Kubernetes/

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Communicating between Namespaces

Communicating between Namespaces

Learn to establish communication between namespaces.

We'll cover the following...

Creating a Pod

We’ll create an alpine-based Pod that we can use to demonstrate communication between namespaces.

Run the following commands in the widget:

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kubectl config use-context k3d-mycluster
kubectl run test \
    --image=alpine \
    sleep 10000

We switch to the mycluster context (default namespace) and create a Pod with a container based on the alpine image. We let it sleep for a long time. Otherwise, the container would be without a process and stop almost immediately.

Before we proceed, we should confirm if the Pod is running:

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kubectl get pod test

The output is as follows:

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NAME READY STATUS  RESTARTS AGE
test 1/1   Running 0        10m

Please wait a few moments if the Pod is not yet ready. ...