1

Set Configuration Context

kubectl config use-context nk8s

You are tasked to create a secret and consume the secret in pod using environment variables as follow:

TasK

• Create a secret named my-secret with a key/value pair; key2/value10

• Start an nginx pod named nginx-secret using container image nginx, and add an environment variable exposing the value of the secret key key 2, using TEST_VARIABLE as the name for the environment variable inside the pod

Solution - Click to expand!

# Create secret
kubectl create secret generic my-secret --from-literal=key2=value10

# Create nginx pod
kubectl run nginx-secret --image=nginx --restart=Never --dry-run=client -o yaml > nginx-secret.yaml

# Update the nginx-secret.yaml like below
apiVersion: v1
kind: Pod
metadata:
  creationTimestamp: null
  labels:
    run: nginx-secret
  name: nginx-secret
spec:
  containers:
  - image: nginx
    name: nginx-secret
    resources: {}
    env: 
    - name: TEST_VARIABLE  #Env Variable Name
      valueFrom:
          secretKeyRef:
            name: my-secret  #Secret Name
            key: key2        #Key in the secret
  dnsPolicy: ClusterFirst
  restartPolicy: Never
status: {}

# Apply the updated file
kubectl apply -f nginx-secret.yaml

# Verify the with below command - This should display TEST_VARIABLE with correct value belong to the key

kubectl exec nginx-secret -- env

# OUTPUT - similar to below
HOSTNAME=nginx-secret
TEST_VARIABLE=value10