installation.txt

------------------
👉 Installation 
-----------------
✅ Java
sudo yum update -y
sudo amazon-linux-extras install epel -y
sudo amazon-linux-extras install java-openjdk11 -y

✅ Jenkins
sudo wget -O /etc/yum.repos.d/jenkins.repo \
    https://pkg.jenkins.io/redhat-stable/jenkins.repo

sudo rpm --import https://pkg.jenkins.io/redhat-stable/jenkins.io.key

sudo yum update -y 
sudo yum install jenkins -y

sudo service jenkins start
sudo chkconfig jenkins on
sudo service jenkins status

ps aux | grep -i jenkins

cat /etc/passwd

✅ Git
sudo yum install git -y

✅ Docker
sudo yum update -y
sudo yum install docker -y
sudo systemctl status docker
sudo groupadd docker 
sudo usermod -aG docker $USER
sudo usermod -aG docker jenkins
newgrp docker
sudo systemctl enable --now docker

✅ Kubectl
cat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
EOF
sudo yum install -y kubectl

✅ Minikube
https://aws.plainenglish.io/running-kubernetes-using-minikube-cluster-on-the-aws-cloud-4259df916a07

curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
sudo install minikube-linux-amd64 /usr/bin/minikube

sudo yum install conntrack-tools -y

minikube start --vm-driver=none

kubectl run hello-minikube --image=gcr.io/google_containers/echoserver:1.4 --port=8080
kubectl expose pod hello-minikube --type=NodePort


----------------
👉 Extras
----------------
🔖 Plugins
    Docker plugin
    Build Pipeline View
    Generic Webhook Trigger
    http://65.2.81.255:8080/generic-webhook-trigger/invoke?token=gitopspipeline


🔖 Pipeline Configurations

    action
    $.action

    base
    $.pull_request.base.ref

    head
    $.pull_request.head.ref

    Expression
    ^opened dev master$
    Text
    $action $head $base


stage('Trigger Repo Change Pipeline') {
        steps {
            sh "curl -v -k --user admin:1150c3d54f5d2b1b0bfcc8da3d371a6d9e -X POST -H 'cache-control: no-cache' -H  'content-type: application/x-www-form-urlencoded' --data 'IMAGE_TAG=${IMAGE_TAG}' 'http://65.0.124.243:8080/job/gitops-config-update/buildWithParameters?token=gitops-config-update'"
            }
        }


----------------------------------------------------------------

pipeline {
    agent any
     environment {
        DOCKERHUB_USERNAME = "kunchalavikram"
        APP_NAME = "gitops-demo-app"
        IMAGE_NAME=  "${DOCKERHUB_USERNAME}" + "/" + "${APP_NAME}"
        REGISTRY_CREDS = 'dockerhub'                     
    }
    stages{
        
        stage('print') {
            steps {
                print IMAGE_TAG
            }
        }
        
        stage('Workspace CleanUp'){
            steps{
                script{
                    cleanWs()
                }
            }
        }

        stage('Checkout SCM') {
            steps {
                git credentialsId: 'github_token', 
                url: 'https://github.com/kunchalavikram1427/gitops-demo-config.git',
                branch: 'master'
            }
        }
        
        stage('Update Kubernetes deployment file'){
            steps {
                script {    
                    sh "cat deployment.yml"
                    sh "sed -i 's/${APP_NAME}.*/${APP_NAME}:${IMAGE_TAG}/g' deployment.yml"
                    sh "cat deployment.yml"               
                }
            }
        }
        stage('Push the updated files to Git'){
            steps {
                script {
                    sh """
                    git config --global user.name 'vikram'
                    git config --global user.email 'vikram@gmail.com' 
                    git add deployment.yml
                    git commit -m 'Updated deployment files' """
                    withCredentials([usernamePassword(credentialsId: 'github_token', passwordVariable: 'password', usernameVariable: 'username')]) {
                        sh "git push http://$username:$password@github.com/kunchalavikram1427/gitops-demo-config.git master" 
                    }
                }
            }
        }

    }
}


post {
    always {
            mail to: 'vikram@gmail.com',
            subject: "Status of CI Pipeline: ${currentBuild.fullDisplayName}",
            body: "${env.BUILD_URL} has result ${currentBuild.result}"
            }
    }