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Introduction to ConfigMap

A ConfigMap is kubernetes is used to store non-confidential data in key-value pairs.

Pods can consume ConfigMaps as environment variables, command-line arguments, or as configuration files in a volume.

A ConfigMap allows for decoupling of configuration data from container images and provides flexibility in managing application configurations.

A ConfigMap is not designed to hold large chunks of data. The data stored in a ConfigMap cannot exceed 1 MiB. If you need to store settings that are larger than this limit, you may want to consider mounting a volume or use a separate database or file service.

Use Cases of ConfigMap

  1. Environment Variables: ConfigMaps can be used to set environment variables for containers running in a pod.

  2. Application Configuration: ConfigMaps are frequently used to store application configuration data, such as database connection strings and API endpoints.

  3. File Mounts: ConfigMaps can be used to mount configuration files as volumes in Kubernetes pods. This allows applications to read configuration files without having to include them in the container image.