Lab Information
Some of the Nautilus team developers are developing a static website and they want to deploy it on Kubernetes cluster. They want it to be highly available and scalable. Therefore, based on the requirements, the DevOps team has decided to create a deployment for it with multiple replicas. Below you can find more details about it:
Create a deployment using nginx image with latest tag only and remember to mention the tag i.e nginx:latest. Name it as nginx-deployment. The container should be named as nginx-container, also make sure replica counts are 3.
Create a NodePort type service named nginx-service. The nodePort should be 30011.
Note: The kubectl utility on jump_host has been configured to work with the kubernetes cluster.
Lab Solutions
Step 1: Create the Deployment YAML configuration
Create a file named nginx-deployment.yaml:
cat > nginx-deployment.yaml << EOF
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx-deployment
spec:
replicas: 3
selector:
matchLabels:
app: nginx
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx-container
image: nginx:latest
ports:
- containerPort: 80
EOF
Step 2: Create the Deployment
Apply the deployment configuration:
kubectl apply -f nginx-deployment.yaml
Step 3: Verify the Deployment
Check if the deployment is created and all replicas are running:
kubectl get deployment nginx-deployment
Step 4: Verify the Pods
Check the pods created by the deployment:
kubectl get pods -l app=nginx
Step 5: Create the Service YAML configuration
Create a file named nginx-service.yaml:
cat > nginx-service.yaml << EOF
apiVersion: v1
kind: Service
metadata:
name: nginx-service
spec:
type: NodePort
selector:
app: nginx
ports:
- protocol: TCP
port: 80
targetPort: 80
nodePort: 30011
EOF
Step 6: Create the Service
Apply the service configuration:
kubectl apply -f nginx-service.yaml
Step 7: Verify the Service
Check if the service is created correctly:
kubectl get service nginx-service
Step 8: Detailed Service Verification
Get more details about the service:
kubectl describe service nginx-service
Step 9: Test the Setup
Test if the service is working by accessing it. Since this is a Kubernetes cluster, you can test using:
Using curl from inside the cluster
Get the Cluster IP of the service
CLUSTER_IP=$(kubectl get service nginx-service -o jsonpath='{.spec.clusterIP}')
Test access using Cluster IP
kubectl run test-pod --image=nginx:latest --rm -it --restart=Never -- bash -c "curl http://$CLUSTER_IP"
Step 10: Verify Endpoints
Check that the service is correctly targeting all 3 pods:
kubectl get endpoints nginx-service
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