The Kubernetes command-line tool, kubectl, allows you to run commands against Kubernetes clusters. You can use kubectl
to deploy applications, inspect and manage cluster resources, and view logs. For more information including a complete list of kubectl operations, see the kubectl documentation.
In this tutorial, I want to share with you how to connect to multi Kubernetes Cluster by using kubectl
on a computer.
For configuration, kubectl
looks for a file named config
in the $HOME/.kube
directory. To show current configuration, you run command:
kubectl config view
Result:
apiVersion: v1
clusters:
- cluster:
certificate-authority-data: DATA+OMITTED
server: https://192.168.1.50:6443
name: cluster-one.me
contexts:
- context:
cluster: cluster-one.me
user: khoidn
name: cluster-one.me
current-context: cluster-one.me
kind: Config
preferences: {}
users:
- name: osbkca
user:
client-certificate-data: REDACTED
client-key-data: REDACTED
In above configuration, we have one cluster cluster-one.me. If you have another cluster cluster-second.me with file config at ~/.kube/cluster-second.config . Use the following commands to merge configuration files.
export KUBECONFIG=~/.kube/config:~/.kube/cluster-second.config
kubectl config view --flatten > ~/.kube/config_temp
mv ~/.kube/config_temp ~/.kube/config
Now you run kubectl config get-contexts
to see the differences.
CURRENT NAME CLUSTER AUTHINFO NAMESPACE
* cluster-one.me cluster-one.me osbkca
cluster-second.me cluster-sencond.me osbkca
You can switch context of kubectl with the command kubeclt config use-context cluster-sencond.me
Wooow! Enjoy it. More info
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