Question

A developer wants to store the entire contents of a 3 MB application configuration file inside a single ConfigMap and mount it into their Pods. When they try to create the ConfigMap, the API server rejects it. What is the most likely reason for the rejection?

Accepted Answer

A ConfigMap's total data cannot exceed roughly 1 MiB because of the underlying etcd object size limit.

Answer

ConfigMaps can only store key-value pairs, not the contents of files.

Answer

ConfigMaps must be created in the kube-system namespace to hold large files.

Answer

The file must be base64-encoded before it can be stored in any ConfigMap.