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How can I set a default kubectl namespace for a given cluster?

By default, kubectl will search the default namespace for any newly added clusters to your context, which can be quite annoying.

You can of course tack on -n <namespace> manually or make your own little wrapper around kubectl as I have.

A simpler version though is to just do the following:

kubectl config set-context --current --namespace=baseball
Context "sports" modified

Where baseball is the name of your namespace of course.

Going forward, any commands will default to use the baseball namespace but you can override them as always with -n.