microkonf

This tool takes in the kubeconfig YAML output by microk8s config of your current cndi cluster, transforms it so to be used by kubectl and writes it to ~/.kube/config.

usage

After adding the microkonf.sh file to your path and making it executable (eg. chmod +x microkonf.sh), you can run the following command to update your ~/.kube/config file:

export MICROK8S_HOST='ec2-44-199-250-39.compute-1.amazonaws.com'; 
k=$(ssh -i 'cndi_rsa' "ubuntu@$MICROK8S_HOST" -t 'sudo microk8s config') && echo "$k" | microkonf

dependencies

• kubectl used to query, update, and delete ~/.kube/config data

transformations

• updates the server field to the public address passed in the MICROK8S_HOST environment variable
• removes the certificate-authority-data field
• adds the insecure-skip-tls-verify: true field
• adds an 'admin' user with corresponding client-certificate-data and client-key-data

notes

All microk8s clusters are simply named microk8s-cluster in the ~/.kube/config file, so if you have an existing microk8s cluster present, you will be asked if it should be overwritten. The same applied to users, where they are also exported from micork8s config.

why the weird $k variable?

We only want to pass the result of the ssh execution if it is successful.

See https://stackoverflow.com/a/31424574