Streamlining Kubernetes Configuration

Mastering ConfigMaps: The Key to Kubernetes Configuration Efficiency

Unleashing the Power of ConfigMaps for Flexible, Decoupled Kubernetes Application Configurations

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Table of Contents

1. Portable Data with ConfigMaps
2. Using ConfigMaps

1. Portable Data with ConfigMaps

In keeping with the concept of decoupling in Kubernetes, using a ConfigMap decouples a container image from configuration artifacts.

ConfigMaps store data as sets of key-value pairs or plain configuration files in any format. The data can come from a collection of files or all files in a directory. It can also be populated from a literal value.

A ConfigMap can be used in several different ways. A Pod can use the data as environmental variables from one or more sources. The values contained inside can be passed to commands inside the pod. A Volume or a file in a Volume can be created, including different names and particular access modes. In addition, cluster components like controllers can use the data.

Let’s say we have a file on your local filesystem called config.js. We can create a…