How to switch Kubernetes Contexts
What is Kubernetes context ?
A Kubernetes context is a group of access parameters that define which cluster you’re interacting with, which user you’re using, and which namespace you’re working in. It’s helpful if you need to access different clusters for different purposes or if you want to limit your access to certain parts of a cluster.
Data config of Kubernetes context is at default location path file: $HOME/.kube/config.
How To Use Kubernetes Contexts
How to list current local Kubernetes contexts ?
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$ kubectl config get-contexts
CURRENT NAME CLUSTER AUTHINFO NAMESPACE
* amagez-gitlab amagez-ant_asia-northeast3_inspectorio-gitlab amagez-ant_asia-northeast3_inspectorio-gitlab
amagez-preprod amagez-preprod_us-west1_inspectorio-preprod amagez-preprod_us-west1_inspectorio-preprod
amagez-prod amagez-production_asia-northeast1_inspectorio-production amagez-production_asia-northeast1_inspectorio-production
amagez-stg amagez-saas-west1_inspectorio-staging amagez-saas-west1_inspectorio-staging
You can list without header column and show only name part.
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$ kubectl config get-contexts --no-headers -o=name
amagez-gitlab
amagez-preprod
amagez-prod
amagez-stg
How about list current kubectl context ?
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$ kubectl config current-context
amagez-prod
Or you can view directly content of file $HOME/.kube/config.
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$ grep "current-context" ${HOME}/.kube/config | awk -F':' '{print $2}' | tr -d ' '
amagez-prod
Final, i want to switch to a new Kubernetes context.
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$ kubectl config use-context amagez-stg
Switched to context "amagez-stg".
$ kubectl config current-context
amagez-stg
Open source tools
- https://github.com/ahmetb/kubectx
- https://github.com/Amagez/kube-profiles
Practice Video
Conclusion
Above is just some writeup relate to scope content How to switch Kubernetes contexts. We still have many actions like add and delete kubernetes context. But you can see in another articles.