Can I use a ConfigMap to store my database password or API keys?

Absolutely not. ConfigMaps are stored in plain text. Anyone with access to the cluster or the YAML repository can read them. For passwords and API keys, you must use a Kubernetes `Secret`.

Is there a size limit to a ConfigMap?

Yes. Because ConfigMaps are stored in the cluster's underlying `etcd` database, they are strictly limited to 1MB in size. If you have a configuration file larger than 1MB, you must store it on a Persistent Volume or external object storage (like AWS S3).

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Decoupling with ConfigMaps

Master the Twelve-Factor App configuration methodology in Kubernetes. Explore how to create ConfigMaps, inject them as environment variables, mount them as physical file volumes, and handle config updates.

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