QUESTION: 37

Create a pod with init container which waits for a service called "myservice" to be created. Once init container completes, the myapp-container should start and print a message "The app is running" and sleep for 3600 seconds.

Solution:

vim multi-container-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: myapp-pod
labels:
app: myapp
spec:
containers:
- name: myapp-container
image: busybox:1.28
command: ['sh', '-c', 'echo The app is running! && sleep 3600']
initContainers:
- name: init-myservice
image: busybox:1.28
command: ['sh', '-c', "until nslookup myservice.$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace).s vc.cluster.local; do echo waiting for myservice; sleep 2; done"]
// Check whether service called "myservice" exists
kubectl get svc
Note: Pod will not start if service called "myservice" doesn't exist.
// Now, Create the pod
kubectl apply -f multi-container-pod.yaml

Answer(s): A

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QUESTION: 38

Create 5 nginx pods in which two of them is labeled env=prod and three of them is labeled env=dev

Solution:

kubectl run nginx-dev1 --image=nginx --restart=Never -- labels=env=dev
kubectl run nginx-dev2 --image=nginx --restart=Never -- labels=env=dev
kubectl run nginx-dev3 --image=nginx --restart=Never -- labels=env=dev
kubectl run nginx-prod1 --image=nginx --restart=Never -- labels=env=prod
kubectl run nginx-prod2 --image=nginx --restart=Never -- labels=env=prod

Answer(s): A

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