ConfigMap Reload With Sidecar

Scenario

Your application needs to react to configuration changes without requiring a pod restart.

Task

Create a ConfigMap and a pod with a sidecar that watches for configuration file changes. Mount the ConfigMap to both containers.

Property	Value
Namespace	default
ConfigMap	app-config
ConfigMap key	settings.conf
ConfigMap value	debug=false
Pod	app-pod
Main container	app
Main image	nginx:1.24
Sidecar container	config-watcher
Sidecar image	busybox
Mount path	/etc/config

Sidecar container snippet is at /home/interview/watcher.yaml.

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📹 Video Solution