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.