Deploy Nginx Web Server on Kubernetes Cluster

Task:
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 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 tag i.e nginx:latest and name it as nginx-deployment. App labels should be app: nginx-app and type: front-end. The container should be named as nginx-container; also make sure replica counts are 3.
Also create a service named nginx-service and type NodePort. The targetPort should be 80 and nodePort should be 30011.
Note: The kubectl utility on jump_host has been configured to work with the kubernetes cluster.

Step 1) Create deploy.yaml file using --dry-run command and modify later as per your requirements.

thor@jump_host ~$ kubectl create deploy nginx-deployment --image=nginx:latest --dry-run=client -o yaml > deploy.yaml

thor@jump_host ~$ cat deploy.yaml 

apiVersion: apps/v1

kind: Deployment

metadata:

  creationTimestamp: null

  labels:

    app: nginx-deployment

  name: nginx-deployment

spec:

  replicas: 1

  selector:

    matchLabels:

      app: nginx-deployment

  strategy: {}

  template:

    metadata:

      creationTimestamp: null

      labels:

        app: nginx-deployment

    spec:

      containers:

      - image: nginx:latest

        name: nginx

        resources: {}

status: {}

thor@jump_host ~$ vi deploy.yaml 

thor@jump_host ~$ cat deploy.yaml 

apiVersion: apps/v1

kind: Deployment

metadata:

  labels:

    app: nginx-app

    type: front-end

  name: nginx-deployment

spec:

  replicas: 3

  selector:

    matchLabels:

      app: nginx-deployment

  template:

    metadata:

      labels:

        app: nginx-deployment

    spec:

      containers:

      - image: nginx:latest

        name: nginx-container

Step 2) Apply the deployment changes

thor@jump_host ~$ kubectl apply -f deploy.yaml 

deployment.apps/nginx-deployment created

Step 3) Create service.yaml file using --dry-run command and modify later as per your requirements.

 thor@jump_host ~$ kubectl expose deploy nginx-deployment --name=nginx-service --type=NodePort --port=30011 --target-port=80 --dry-run=client -o yaml > service.yaml

thor@jump_host ~$ cat service.yaml 

apiVersion: v1

kind: Service

metadata:

  creationTimestamp: null

  labels:

    app: nginx-app

    type: front-end

  name: nginx-service

spec:

  ports:

  - port: 30011

    protocol: TCP

    targetPort: 80

  selector:

    app: nginx-deployment

  type: NodePort

status:

  loadBalancer: {}

thor@jump_host ~$ vi service.yaml

thor@jump_host ~$ cat service.yaml 

apiVersion: v1

kind: Service

metadata:

  labels:

    app: nginx-app

    type: front-end

  name: nginx-service

spec:

  ports:

  - nodePort: 30011

    protocol: TCP

    port: 80

    targetPort: 80

  selector:

    app: nginx-deployment

  type: NodePort

Step 4) Apply the Service changes

thor@jump_host ~$ kubectl apply -f service.yaml 

service/nginx-service created

Step 5) Validate the deployment and Service

thor@jump_host ~$ kubectl get deployment -o wide

NAME               READY   UP-TO-DATE   AVAILABLE   AGE   CONTAINERS   IMAGES         SELECTOR

nginx-deployment   3/3     3            3           97s   nginx        nginx:latest   app=nginx-deployment

thor@jump_host ~$ kubectl get service -o wide

NAME            TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)           AGE     SELECTOR

kubernetes      ClusterIP   10.96.0.1       <none>        443/TCP           3h52m   <none>

nginx-service   NodePort    10.103.135.28   <none>        80:30011/TCP   33s     app=nginx-deployment