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Practice Test Env Variables

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Solutions to practice test env variables

• Run the command ‘kubectl get pods’ and count the number of pods.

  ``` $ kubectl get pods ```

• Run the command ‘kubectl describe pod’ and look for ENV option

  ``` $ kubectl describe pod ```

• Run the command ‘kubectl describe pod’ and look for ENV option

  ``` $ kubectl describe pod ```

• View the web application UI by clicking on the ‘Webapp Color’ Tab above your terminal.

• Set the environment option to APP_COLOR - green.

  ``` $ kubectl get pods webapp-color -o yaml > green.yaml $ kubectl delete pods webapp-color Update APP_COLOR to green $ kubectl create -f green.yaml ```

• View the changes to the web application UI by clicking on the ‘Webapp Color’ Tab above your terminal.

• Run kubectl get configmaps

  ``` $ kubectl get configmaps ```

• Run the command ‘kubectl describe configmaps’ and look for DB_HOST option

  ``` $ kubectl describe configmaps ```

• Create a new ConfigMap for the ‘webapp-color’ POD. Use the spec given on the right.

  ``` $ kubectl create configmap webapp-config-map --from-literal=APP_COLOR=darkblue ```

• Set the environment option to envFrom and use configMapRef webapp-config-map.

  ``` $ kubectl get pods webapp-color -o yaml > new-webapp.yaml $ kubectl delete pods webapp-color Update pod definition file, under spec.containers section update the below. - envFrom: - configMapRef: name: webapp-config-map ```
  ``` $ kubectl create -f new-webapp.yaml ```

• View the changes to the web application UI by clicking on the ‘Webapp Color’ Tab above your terminal.