Blog on Kubernetes Project

Hello everyone in this blog we gonna do a project on Kubernetes that brings the reddit clone image from the docker hub and deploy through Kubeadm cluster with the help of deployment.yml and service.yml file let's do it step-by-step.

Prerequisite

Make two instance naming Kubernetes-master and Kubernetes-worker with instance type both set to t2.medium as shown in the below image
Make a Kubernetes cluster in this if you don't know how to do it please check this blog.

To confirm that your are connected run these commands in the master server
```
 kebectl get nodes
```
You should see like this in the image shown below

Step 1: Create a namespace called reddit-clone-ns by running these commands

kubectl create namespace reddit-clone-ns

In the below image you can see we have created "reddit-clone-ns" namespace

Step 2: Make a directory called deployment_k8s in master server and change directory to it

Step 3: Create a deployment.yml file in that directory

Step 4: In deployment.yml run these commands

apiVersion: apps/v1
kind: Deployment
metadata:
  name: reddit-clone-deployment
  namespace: reddit-clone-ns
  labels:
    app: reddit-clone
spec:
  replicas: 2
  selector:
    matchLabels:
      app: reddit-clone
  template:
    metadata:
      labels:
        app: reddit-clone
    spec:
      containers:
      - name: reddit-clone
        image: gurucharan22/reddit-clone-app:latest
        ports:
        - containerPort: 3000

here containerPort is 3000 because our reddit clone image we have expose port number 3000 and "gurucharan22/reddit-clone-app:latest" is our docker hub image id from that we are pulling that image

Step 5: Run these commands on master node

kubectl apply -f deployment.yml

Step 6: Run these commands on master node to confirm that what are the pods running in reddit-clone-ns namespace.

kubectl get pods -n=reddit-clone-ns

Step 7: Create a service.yml file in that directory

Step 8: In service.yml run these commands

apiVersion: v1
kind: Service
metadata:
  name: reddit-clone-service
  namespace: reddit-clone-ns
spec:
  type: NodePort
  selector:
    app: reddit-clone
  ports:
      # By default and for convenience, the `targetPort` is set to the same value as the `port` field.
    - port: 80
      targetPort: 3000
      # Optional field
      # By default and for convenience, the Kubernetes control plane will allocate a port from a range (default: 30000-32767)
      nodePort: 30007

Step 9: Run these commands on master node

kubectl apply -f service.yml

Step 10: Run these commands on master node to confirm that what are the services running in reddit-clone-ns namespace.

kubectl get service -n reddit-clone-ns

Step 11: Run these commands in worker node

sudo docker ps

here you can see two replicas are running

Step 12: In the worker node open port 30007 in the security group and copy its Public IP address and paste it to google chrome

Now you see we have successfully deployed our application reedit clone through Kubernetes

Thank you for reading this blog and if any queries or if any corrections to be done in this blog please let me know.

Kubernetes Project

Table of contents

Prerequisite