2025-01-13

ConfigMap - non confidential information Secrets - confidential information

ConfigMap

Creation through Imperative way

Create configMap Command

kubectl create cm nginx-cm --from-file=index.html

generate configmap definition file

kubectl create cm nginx-cm --from-file=index.html --dry-run=client -o yaml > configmap.yaml

Enter into pod shell

kubectl exec -it mypod --bash

Port forward

kubectl port-forward service/myservice 80:80

Secrets

Three types of secret

• docker-registry : Create a secret for use with a Docker registry
• generic : Create a secret from a local file, directory, or literal value
• tls : Create a TLS secret

Generate Secret.yaml file

kubectl create secret generic --from-literal=idli=chutney --dry-run=client -o yaml > secret.yaml

Decode secret

echo "Y2hhdG55" | base64 --decode

Expose pod external port

kubectl expose pod nginx-secret --port=80 -o yaml --dry-run=client > svc.yaml

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Tommorrow:

• k8s Namespace
• k8s Volume