Kubernetes

ConfigMaps Commands

Manage non-sensitive configuration separately from code. Learn to create, update, and consume ConfigMaps in your applications for environment-specific settings.

5 commands

Pro Tips

Use 'kubectl create configmap --from-file' to load entire config files into a ConfigMap.

Mount ConfigMaps as volumes to get automatic updates when the ConfigMap changes (with some delay).

Use 'kubectl create configmap --from-env-file' to create from .env format files.

Common Mistakes

ConfigMaps have a 1MB size limit. For larger configs, consider mounting from external storage.

Environment variables from ConfigMaps don't auto-update. The pod must restart to see changes.

Commands

List configmaps

$ kubectl get configmaps

List all configmaps in namespace.

Create configmap from literal

$ kubectl create configmap <name> --from-literal=key=value

Create configmap with key-value pair.

Create configmap from file

$ kubectl create configmap <name> --from-file=config.yaml

Create configmap from a file.

Create configmap from directory

$ kubectl create configmap <name> --from-file=./config/

Create configmap from directory of files.

Get configmap data

$ kubectl get configmap <name> -o yaml

View configmap contents as YAML.