jenkinfilekub

 def dockerfile = 'dockerfile'
 def registry = 'localhost:5000'
 def imageName = 'myimage'
 def imageTag = 'latest'
 def manifestFile = 'kubernetes-manifest.yaml'
 def namespace = 'default'
 def IMAGE_BRANCH_TAG = "${registry}/${imageName}:${imageTag}"
pipeline {
    agent any
    
    // Define variables at the top level
//    def dockerfile = 'dockerfile'
  //  def registry = 'localhost:5000'
    // def imageName = 'myimage'
    // def imageTag = 'latest'
    // def manifestFile = 'k8s-deployment.yaml'
    // def namespace = 'default'
    
    stages {
        stage('Checkout the Git repository') {
            steps {
                git branch: 'master', url: 'https://github.com/amitopenwriteup/cicd.git'
            }
        }
        stage('Build Docker image') {
            steps {
                script {
                    def dockerImage = docker.build("${registry}/${imageName}:${imageTag}", "-f ${dockerfile} .")
                    dockerImage.push()
                }
            }
        }
        stage('Apply Kubernetes manifest') {
         steps {
          withCredentials([file(credentialsId: '9445dd9b-e604-40cd-a802-79f747011ecb', variable: 'KUBECONFIG')])
         {
            script {
                sh """
                sed \
                    -e "s|{{NAMESPACE}}|${namespace}|g" \
                    -e "s|{{PULL_IMAGE}}|${IMAGE_BRANCH_TAG}|g" \
                    ${manifestFile} \
                | kubectl apply -f -
                """
            }
        }
    }
}

 }
}