QUESTION: 33

Create a Pod with main container busybox and which executes this "while true; do echo `Hi I am from Main container' >> /var/log/index.html; sleep 5; done" and with sidecar container with nginx image which exposes on port 80. Use emptyDir Volume and mount this volume on path /var/log for busybox and on path /usr/share/nginx/html for nginx container. Verify both containers are running.

Solution:

// create an initial yaml file with this
kubectl run multi-cont-pod --image=busbox --restart=Never -- dry-run -o yaml > multi-container.yaml
// edit the yml as below and create it
kubectl create -f multi-container.yaml
vim multi-container.yaml
apiVersion: v1
kind: Pod
metadata:
labels:
run: multi-cont-pod
name: multi-cont-pod
spec:
volumes:
- name: var-logs
emptyDir: {}
containers:
- image: busybox
command: ["/bin/sh"]
args: ["-c", "while true; do echo 'Hi I am from Main container' >> /var/log/index.html; sleep 5;done"]
name: main-container
volumeMounts:
- name: var-logs
mountPath: /var/log
- image: nginx
name: sidecar-container
ports:
- containerPort: 80
volumeMounts:
- name: var-logs

mountPath: /usr/share/nginx/html
restartPolicy: Never
// Create Pod
kubectl apply -f multi-container.yaml
//Verify
kubectl get pods

Answer(s): A

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QUESTION: 34

Exec into both containers and verify that main.txt exist and

Solution:
NEED TO WRITE ANSWER FOR THIS

Answer(s): A

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QUESTION: 35

Create an nginx pod and set an env value as 'var1=val1'. Check the env value existence within the pod

Solution:

kubectl run nginx --image=nginx --restart=Never --env=var1=val1 # then
kubectl exec -it nginx -- env
# or
kubectl exec -it nginx -- sh -c 'echo $var1'
# or
kubectl describe po nginx | grep val1
# or
kubectl run nginx --restart=Never --image=nginx --env=var1=val1 -it --rm env

Answer(s): A

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QUESTION: 36

Create a pod with init container which create a file "test.txt" in "workdir" directory. Main container should check a file "test.txt" exists and execute sleep 9999 if the file exists.

Solution:

// create an initial yaml file with this
kubectl run init-cont-pod --image=alpine --restart=Never --dry-run -o

yaml > init-cont-pod.yaml
// edit the yml as below and create it
vim init-cont-pod.yaml
apiVersion: v1
kind: Pod
metadata:
name: init-cont-pod
labels:
app: myapp
spec:
volumes:
- name: test-volume
emptyDir: {}
containers:
- name: main-container
image: busybox:1.28
command: ['sh', '-c', 'if [ -f /workdir/test.txt ]; then sleep 9999; fi']
volumeMounts:
- name: test-volume
mountPath: /workdir
initContainers:
- name: init-myservice
image: busybox:1.28
command: ['sh', '-c', "mkdir /workdir; echo >
/workdir/test.txt"]
volumeMounts:
- name: test-volume
mountPath: /workdir
// Create the pod
kubectl apply -f init-cont-pod.yaml
kubectl get pods
// Check Events by doing
kubectl describe po init-cont-pod
Init Containers:
init-myservice:
Container ID:
docker://ebdbf5fad1c95111d9b0e0e2e743c2e347c81b8d4eb5abcccdfe1dd74524 0d4f
Image: busybox:1.28
Image ID: dockerpullable://busybox@sha256:141c253bc4c3fd0a201d32dc1f493bcf3fff003b6df 416dea4f41046e0f37d47
Port: <none>
Host Port: <none>
Command:
sh
-c
mkdir /workdir; echo > /workdir/test.txt

State: Terminated
Reason: Completed

Answer(s): A

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QUESTION: 33

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QUESTION: 35

QUESTION: 36