Using ConfigMaps as environment variables in Kubernetes - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a ConfigMap named app-config with a key APP_MODE set to production.

Kubernetes

kubectl create configmap app-config --from-literal=[1]

Drag options to blanks, or click blank then click option'

AAPP_MODE=production

BAPP_MODE production

CAPP_MODE: production

DAPP_MODE=>production

Attempts:

3 left

💡 Hint

Common Mistakes

Using spaces instead of '=' between key and value.

Using ':' or '=>' which are invalid here.

The correct syntax to create a ConfigMap from a literal key-value pair is --from-literal=KEY=VALUE.

2fill in blank

medium

Complete the Pod YAML snippet to use the ConfigMap app-config as environment variables.

Kubernetes

envFrom:
  - configMapRef:
      name: [1]

Drag options to blanks, or click blank then click option'

Aapp-config

Bappconfig

Cconfig-app

Dapp_config

Attempts:

3 left

💡 Hint

Common Mistakes

Using underscores instead of hyphens.

Changing the order of words in the name.

The ConfigMap name must exactly match the created ConfigMap, which is app-config.

3fill in blank

hard

Fix the error in this environment variable definition to correctly reference the ConfigMap key APP_MODE.

Kubernetes

- name: APP_MODE
  valueFrom:
    configMapKeyRef:
      name: app-config
      key: [1]

Drag options to blanks, or click blank then click option'

AappMode

Bapp_mode

CAppMode

DAPP_MODE

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or camelCase instead of uppercase with underscores.

Misspelling the key name.

The key name is case-sensitive and must match exactly as defined in the ConfigMap, which is APP_MODE.

4fill in blank

hard

Fill both blanks to complete the Pod spec that uses the ConfigMap app-config and sets the environment variable APP_MODE from the key APP_MODE.

Kubernetes

env:
  - name: [1]
    valueFrom:
      configMapKeyRef:
        name: [2]
        key: APP_MODE

Drag options to blanks, or click blank then click option'

AAPP_MODE

Bapp-config

Capp_mode

Dconfigmap

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect env var names that don't match the key.

Using wrong ConfigMap names.

The environment variable name should be APP_MODE and the ConfigMap name is app-config.

5fill in blank

hard

Fill all three blanks to complete the Pod spec that uses envFrom to load all keys from the ConfigMap app-config as environment variables.

Kubernetes

spec:
  containers:
  - name: myapp
    image: myapp:latest
    envFrom:
    - [1]:
        name: [2]
        optional: [3]

Drag options to blanks, or click blank then click option'

AconfigMapRef

Bapp-config

Cfalse

DsecretRef

Attempts:

3 left

💡 Hint

Common Mistakes

Using secretRef instead of configMapRef.

Setting optional to true when the ConfigMap is required.

Use configMapRef to reference the ConfigMap named app-config. The optional field is usually set to false to require the ConfigMap.