Linux Foundation CKA Quiz 15 Topic 4 Questions 71-75

Question: 1

Create a deployment called webapp with image nginx having 5 replicas in it, put the file in /tmp directory with named webapp.yaml

A//Create a file using dry run command
kubectl create deploy --image=nginx --dry-run -o yaml >
/tmp/webapp.yaml
// Now, edit file webapp.yaml and update replicas=5
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: webapp
name: webapp
spec:
replicas: 5
selector:
matchLabels:
app: webapp
template:
metadata:
labels:
app: webapp
spec:
containers:
- image: nginx
name: nginx
Note: Search 'deployment' in kubernetes.io site , you will get
the page
https://kubernetes.io/docs/concepts/workloads/controllers/deplo
yment/
// Verify the Deployment
kubectl get deploy webapp --show-labels
// Output the YAML file of the deployment webapp
kubectl get deploy webapp -o yaml

B//Create a file using dry run command
kubectl create deploy --image=nginx --dry-run -o yaml >
/tmp/webapp.yaml
// Now, edit file webapp.yaml and update replicas=5
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: webapp
name: webapp
spec:
replicas: 5
selector:
matchLabels:
app: webapp
template:
metadata:
labels:
Note: Search 'deployment' in kubernetes.io site , you will get
the page
https://kubernetes.io/docs/concepts/workloads/controllers/deplo
yment/
// Verify the Deployment
kubectl get deploy webapp --show-labels
// Output the YAML file of the deployment webapp
kubectl get deploy webapp -o yaml

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Question: 2

Get the list of pods of webapp deployment

A// Get the label of the deployment
kubectl get deploy --show-labels
kubectl get pods -l app=webapp

B// Get the label of the deployment
kubectl get deploy --show-labels
// Get the pods with that label
kubectl get pods -l app=webapp

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Question: 3

Deployment

a. Create a deployment of webapp with image nginx:1.17.1 with

container port 80 and verify the image version

A// Create initial YAML file with --dry-run option
kubectl create deploy webapp --image=nginx:1.17.1 --dryrun=client -o yaml > webapp.yaml
vim webapp.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: webapp
name: webapp
spec:
replicas: 1
selector:
matchLabels:
app: webapp
template:
metadata:
labels:
app: webapp
spec:
containers:
- image: nginx:1.17.1
name: nginx
kubectl create -f webapp.yaml --record=true
//Verify Image Version
kubectl describe deploy webapp | grep -i 'Image'
Using JsonPath
kubectl get deploy -o=jsonpath='{range.items [*]}{.[*]}
{.metadata.name}{'\t'}{.spec.template.spec.containers[*].i
mage}{'\n'}'

B// Create initial YAML file with --dry-run option
kubectl create deploy webapp --image=nginx:1.17.1 --dryrun=client -o yaml > webapp.yaml
vim webapp.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: webapp
name: webapp
spec:
replicas: 1
containers:
- image: nginx:1.17.1
name: nginx
kubectl create -f webapp.yaml --record=true
//Verify Image Version
kubectl describe deploy webapp | grep -i 'Image'
Using JsonPath
kubectl get deploy -o=jsonpath='{range.items [*]}{.[*]}
{.metadata.name}{'\t'}{.spec.template.spec.containers[*].i
mage}{'\n'}'

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Question: 4

Update the deployment with the image version 1.17.4 and verify

Akubectl set image deploy/webapp nginx=nginx:1.17.4
//Verify
kubectl describe deploy webapp | grep Image
kubectl get deploy -o=jsonpath='{range.items [*]}{.[*]}
{.metadata.name}{'\t'}{.spec.template.spec.containers[*].i
mage}{'\n'}'

Bkubectl set image deploy/webapp nginx=nginx:1.17.4
//Verify
kubectl describe deploy webapp | grep Image
kubectl get deploy -
{.metadata.name}{'\t'}{.spec.template.spec.containers[*].i
mage}{'\n'}'

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Question: 5

Check the rollout history and make sure everything is ok after the update

Akubectl rollout history deploy webapp
kubectl get deploy webapp --show-labels
kubectl get rs -l app=webapp
kubectl get po -l app=webapp

Bkubectl rollout history deploy webapp
kubectl get deploy webapp --show-labels
kubectl get rs -
kubectl get po -l app=webapp

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Linux Foundation CKA Quiz:15 Topic:4 Questions:71-75