Jenkins-Docker-K8S.md

Project Setup using below tools

1. Maven
2. Git Hub
3. Jenkins
4. Docker
5. Kubernetes

Step - 1 : Jenkins Server Setup

1. Create Ubuntu VM using AWS EC2 (t2.medium)
   
2. Enable SSH & 8080 Ports in Ec2 Security Group
   
3. Install Java & Jenkins using below commands
   $ sudo apt-get update
   $ sudo apt-get install default-jdk
   $ curl -fsSL https://pkg.jenkins.io/debian-stable/jenkins.io-2023.key | sudo tee
   /usr/share/keyrings/jenkins-keyring.asc > /dev/null
   $ echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc]
   https://pkg.jenkins.io/debian-stable binary/ | sudo tee
   /etc/apt/sources.list.d/jenkins.list > /dev/null
   $ sudo apt-get update
   $ sudo apt-get install jenkins
   $ sudo systemctl status jenkins
   
4. Copy jenkins admin pwd
   $ sudo cat /var/lib/jenkins/secrets/initialAdminPassword
5. Open jenkins server in browser using VM public ip
   URL : http://public-ip:8080/
6. Create Admin Account & Install Required Plugins in Jenkins

Step - 2 : Install Maven & Git in Jenkins

1. install maven with below command
   $ sudo apt install maven -y
   
   
2. install git with below command
   $ sudo apt install git -y
   
   

Step - 3 : Setup Docker in Jenkins

1. install docker
   $ curl -fsSL get.docker.com | /bin/bash
   

2. Add Jenkins user to docker group
   $ sudo usermod -aG docker jenkins
   

3. Restart Jenkins
   $ sudo systemctl restart jenkins
   

4. Verify docker installation
   $ sudo docker version

Step - 4 : Create EKS Management Host in AWS

1. Launch new Ubuntu VM using AWS Ec2 ( t2.micro )

2. Connect to machine and install kubectl using below commands
   $ curl -o kubectl https://amazon-eks.s3.us-west-2.amazonaws.com/1.19.6/2021-01-05/bin/linux/amd64/kubectl
   $ chmod +x ./kubectl
   $ sudo mv ./kubectl /usr/local/bin
   $ kubectl version --short --client
   

3. Install AWS CLI latest version using below commands

   $ sudo apt install unzip
   $ cd
   $ curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
   $ unzip awscliv2.zip
   $ sudo ./aws/install
   $ aws --version
   

4. Install eksctl using below commands
   $ curl --silent --location "https://github.com/weaveworks/eksctl/releases/latest/download/eksctl_$(uname -s)_amd64.tar.gz" | tar xz -C /tmp
   $ sudo mv /tmp/eksctl /usr/local/bin
   $ eksctl version
   

Step - 5 : Create IAM role & attach to EKS Management Host & Jenkins Server

1. Create New Role using IAM service ( Select Usecase - ec2 )

2. Add below permissions for the role
   

   • IAM - fullaccess
     
   • VPC - fullaccess
     
   • EC2 - fullaccess
     
   • CloudFomration - fullaccess
     
   • Administrator - acces
     

3. Enter Role Name (eksroleec2)

4. Attach created role to EKS Management Host (Select EC2 => Click on Security => Modify IAM Role => attach IAM role we have created)

5. Attach created role to Jenkins Machine (Select EC2 => Click on Security => Modify IAM Role => attach IAM role we have created)

Step - 6 : Create EKS Cluster using eksctl

Syntax:

eksctl create cluster --name cluster-name
--region region-name
--node-type instance-type
--nodes-min 2
--nodes-max 2 \ --zones ,

Example: $ eksctl create cluster --name ashokit-cluster4 --region us-east-1 --node-type t2.medium --zones us-east-1a,us-east-1b

Note: Cluster creation will take 5 to 10 mins of time (we have to wait). After cluster created we can check nodes using below command.

$ kubectl get nodes

Step - 7 :: Install AWS CLI in JENKINS Server

URL : https://docs.aws.amazon.com/cli/latest/userguide/getting-started-install.html

Execute below commands to install AWS CLI

$ curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
$ unzip awscliv2.zip
$ sudo ./aws/install
$ aws --version

Step - 8 : Install Kubectl in JENKINS Server

Execute below commands in Jenkins server to install kubectl

$ curl -o kubectl https://amazon-eks.s3.us-west-2.amazonaws.com/1.19.6/2021-01-05/bin/linux/amd64/kubectl
$ chmod +x ./kubectl
$ sudo mv ./kubectl /usr/local/bin
$ kubectl version --short --client

Step - 9 : Update EKS Cluster Config File in Jenkins Server

1. Execute below command in Eks Management host & copy kube config file data
   $ cat .kube/config

2. Execute below commands in Jenkins Server and paste kube config file
   $ cd /var/lib/jenkins
   $ sudo mkdir .kube
   $ sudo vi .kube/config
   

3. check eks nodes
   $ kubectl get nodes

Note: We should be able to see EKS cluster nodes here.

Step - 10 : Create Jenkins CI Job

• Stage-1 : Clone Git Repo
  
• Stage-2 : Build
  
• Stage-3 : Create Docker Image
  
• Stage-4 : Push Docker Image to Registry
  
• Stage-5 : Trigger CD Job
  

Step - 11 : Create Jenkins CD Job

• Stage-1 : Clone k8s manifestfiles
  
• Stage-2 : Deploy app in k8s eks cluster
  
• Stage-3 : Send confirmatin email
  

Step - 12 : Trigger Jenkins CI Job

• CI Job will execute all the stages and it will trigger CD Job
  
• CD Job will fetch docker image and it will deploy on cluster
  

Step - 13 : Access Application in Browser

• We should be able to access our application
  URL : http://Node-public-ip:NodePort/context-path

We are done with our Setup

Step - 14 : After your practise, delete Cluster and other resources we have used in AWS Cloud to avoid billing