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CKADApplication Environment, Configuration and SecuritySingle nodeEasy

ConfigMap and Secret as env vars and a volume

Scenario ckad-env-001 · about 7 minutes · 9 points · 9 grader checks

Create a ConfigMap and a Secret and consume them in a Pod as single env vars, envFrom and a mounted volume.

  • configmap
  • secret
  • env
  • envfrom
  • volumes

What you will practise

  • Create ConfigMaps and Secrets imperatively
  • Use valueFrom.configMapKeyRef and envFrom.secretRef
  • Mount a ConfigMap as files

Start this lab

With the CLI installed and signed in, this command provisions a single node cluster on your Mac, applies the scenario setup and prints the task below.

goldenkube start ckad-env-001

Task

The task text exactly as the CLI shows it. Solve it on the cluster, then run goldenkube submit.

In namespace "config" (create it if it does not exist): 1. Create a ConfigMap "app-config" with the keys APP_MODE=production and APP_PORT=8080. 2. Create a generic Secret "app-secret" with the key DB_PASSWORD whose value is s3cr3t-pass. 3. Create a Pod "config-pod", image busybox:1.36, command "sleep 3600", that - has an environment variable MODE taken from key APP_MODE of ConfigMap "app-config", - loads every key of Secret "app-secret" as environment variables, - mounts ConfigMap "app-config" as a volume at /etc/app-config. The Pod must be Running.

Requirements and details

Certification
CKAD · Certified Kubernetes Application Developer
Domain
Application Environment, Configuration and Security
Difficulty
Easy
Cluster topology
Single node
Cluster features
None beyond the base cluster
Recommended time
7 minutes
Points
9
Grader checks
9
Kubernetes version
1.37
Minimum CLI version
0.1.0
Scenario version
1
Published

Grading runs locally: 9 state checks read your cluster when you submit; the scenario passes when every check passes. Hints, the reference solution and the check definitions are available only inside the CLI, not on this page.

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