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16 ConfigMap Reload

Dieses Lab vergleicht ConfigMap als Umgebungsvariable und als gemountete Datei.

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16 ConfigMap Reload

Dieses Lab vergleicht ConfigMap als Umgebungsvariable und als gemountete Datei.

Prüfen

bash
kubectl apply --dry-run=client -f manifests/
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Ausführung

bash
kubectl apply -f manifests/
kubectl rollout status deployment/configmap-reload -n config-reload-lab
kubectl exec -n config-reload-lab deploy/configmap-reload -- env | grep APP_MODE
kubectl exec -n config-reload-lab deploy/configmap-reload -- cat /config/message
kubectl patch configmap app-config -n config-reload-lab \
  --type=merge \
  -p '{"data":{"APP_MODE":"patched","message":"Datei wurde aktualisiert"}}'

Nach kurzer Zeit ändert sich die gemountete Datei. Die Env-Var bleibt bis zum Pod-Neustart unverändert.

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Lernpunkte

  • ConfigMap-Keys als Env-Var werden beim Containerstart gelesen.
  • Gemountete ConfigMap-Dateien werden später aktualisiert.
  • Viele Apps brauchen trotzdem einen Reload-Mechanismus.
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Cleanup

bash
kubectl delete namespace config-reload-lab
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K8S · Orthevs Academy

31 modules as one continuous learning path.

The sequence remains unchanged: from the lab skeleton through technical foundations and operating models to final troubleshooting. The technical directory names are deliberately preserved.

Practice modules

Orthevs as an app

Install Orthevs

The Orthevs web app can be installed on supported mobile devices and desktop browsers.

iPhone and iPad

Open Orthevs in Safari. Tap Share, then Add to Home Screen. Enable Open as Web App if offered, then tap Add.

Android

For the web app, open the browser menu and choose Install app or Add to Home screen. Confirm the installation.

Desktop browser

Open the browser menu or the install icon in the address bar, then choose Install app or Add to Dock.

Web app installation depends on your browser. If no install prompt appears, follow the browser steps shown above.