Jenkinsfile

// The MIT License
// SPDX short identifier: MIT
// Further resources on the MIT License
// Copyright 2018 Amit Thakur - amitthk - <e.amitthakur@gmail.com>
// Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

def getEnvVar(String paramName){
    return sh (script: "grep '${paramName}' env_vars/project.properties|cut -d'=' -f2", returnStdout: true).trim();
}
def getTargetEnv(String branchName){
    def deploy_env = 'none';
    switch(branchName) {
        case 'master':
            deploy_env='uat'
        break
        case 'develop':
            deploy_env = 'dev'
        default:
            if(branchName.startsWith('release')){
                deploy_env='sit'
            }
            if(branchName.startsWith('feature')){
                deploy_env='none'
            }
    }
    return deploy_env
}

def getImageTag(String currentBranch)
{
    def image_tag = 'latest'
    if(currentBranch==null){
        image_tag = getEnvVar('IMAGE_TAG')
    }
    if(currentBranch=='master'){
        image_tag= getEnvVar('IMAGE_TAG')
    }
    if(currentBranch.startsWith('release')){
        image_tag = currentBranch.substring(8);
    }
    return image_tag
}
def getTimeStamp(){
    return sh (script: "date +'%Y%m%d%H%M%S%N' | sed 's/[0-9][0-9][0-9][0-9][0-9][0-9]\$//g'", returnStdout: true);
}
pipeline{

environment {
    GIT_COMMIT_SHORT_HASH = sh (script: "git rev-parse --short HEAD", returnStdout: true)
}

agent any

stages{
    stage('Init'){
        steps{
            //checkout scm;
        script{
        env.BASE_DIR = pwd()
        env.CURRENT_BRANCH = env.BRANCH_NAME
        env.IMAGE_TAG = getImageTag(env.CURRENT_BRANCH)
        env.TIMESTAMP = getTimeStamp();
        env.APP_NAME= getEnvVar('APP_NAME')
        env.IMAGE_NAME = getEnvVar('IMAGE_NAME')
        env.PROJECT_NAME=getEnvVar('PROJECT_NAME')
        env.DOCKER_REGISTRY_URL=getEnvVar('DOCKER_REGISTRY_URL')
        env.RELEASE_TAG = getEnvVar('RELEASE_TAG')
        env.DOCKER_PROJECT_NAMESPACE = getEnvVar('DOCKER_PROJECT_NAMESPACE')
        env.DOCKER_IMAGE_TAG= "${DOCKER_REGISTRY_URL}/${DOCKER_PROJECT_NAMESPACE}/${APP_NAME}:${RELEASE_TAG}"
        env.JENKINS_DOCKER_CREDENTIALS_ID = getEnvVar('JENKINS_DOCKER_CREDENTIALS_ID')        
        env.JENKINS_GCLOUD_CRED_ID = getEnvVar('JENKINS_GCLOUD_CRED_ID')
        env.GCLOUD_PROJECT_ID = getEnvVar('GCLOUD_PROJECT_ID')
        env.GCLOUD_K8S_CLUSTER_NAME = getEnvVar('GCLOUD_K8S_CLUSTER_NAME')
        env.JENKINS_GCLOUD_CRED_LOCATION = getEnvVar('JENKINS_GCLOUD_CRED_LOCATION')

        }

        }
    }

    stage('Cleanup'){
        steps{
            sh '''
            docker rmi $(docker images -f 'dangling=true' -q) || true
            docker rmi $(docker images | sed 1,2d | awk '{print $3}') || true
            '''
        }

    }
    stage('Build'){
        steps{
            withEnv(["APP_NAME=${APP_NAME}", "PROJECT_NAME=${PROJECT_NAME}"]){
                sh '''
                docker build -t ${DOCKER_REGISTRY_URL}/${DOCKER_PROJECT_NAMESPACE}/${IMAGE_NAME}:${RELEASE_TAG} --build-arg APP_NAME=${IMAGE_NAME}  -f app/Dockerfile app/.
                '''
            }   
        }
    }
    stage('Publish'){
        steps{
            withCredentials([[$class: 'UsernamePasswordMultiBinding', credentialsId: "${JENKINS_DOCKER_CREDENTIALS_ID}", usernameVariable: 'DOCKER_USERNAME', passwordVariable: 'DOCKER_PASSWD']])
            {
            sh '''
            echo $DOCKER_PASSWD | docker login --username ${DOCKER_USERNAME} --password-stdin ${DOCKER_REGISTRY_URL} 
            docker push ${DOCKER_REGISTRY_URL}/${DOCKER_PROJECT_NAMESPACE}/${IMAGE_NAME}:${RELEASE_TAG}
            docker logout
            '''
            }
        }
    }
    stage('Deploy'){
        steps{
        withCredentials([file(credentialsId: "${JENKINS_GCLOUD_CRED_ID}", variable: 'JENKINSGCLOUDCREDENTIAL')])
        {
        sh """
            #!/bin/sh -xe
            gcloud auth activate-service-account --key-file=${JENKINSGCLOUDCREDENTIAL}
            gcloud config set compute/zone asia-southeast1-a
            gcloud config set compute/region asia-southeast1
            gcloud config set project ${GCLOUD_PROJECT_ID}
            gcloud container clusters get-credentials ${GCLOUD_K8S_CLUSTER_NAME}
            
            chmod +x $BASE_DIR/k8s/process_files.sh

            cd $BASE_DIR/k8s/
            ./process_files.sh $GCLOUD_PROJECT_ID ${IMAGE_NAME} "${DOCKER_PROJECT_NAMESPACE}/${IMAGE_NAME}:${RELEASE_TAG}" "./${IMAGE_NAME}/" $TIMESTAMP

            cd $BASE_DIR/k8s/$IMAGE_NAME/.
            kubectl apply --force=true --all=true --record=true -f $BASE_DIR/k8s/$IMAGE_NAME/
            kubectl rollout status --watch=true --v=8 -f $BASE_DIR/k8s/$IMAGE_NAME/$IMAGE_NAME-deployment.yml

            gcloud auth revoke --all
            """
        }
        }
    }
}

post {
    always {
        echo "Build# ${env.BUILD_NUMBER} - Job: ${env.JOB_NUMBER} status is: ${currentBuild.currentResult}"
        // emailext(attachLog: true,
        // mimeType: 'text/html',
        // body: '''
        // <h2>Build# ${env.BUILD_NUMBER} - Job: ${env.JOB_NUMBER} status is: ${currentBuild.currentResult}</h2>
        // <p>Check console output at &QUOT;<a href='${env.BUILD_URL'>${env.JOB_NAME} - [${env.BUILD_NUMBER}]</a>&QUOT;</p>
        // ''',
        // recipientProviders: [[$class: "FirstFailingBuildSusspectRecipientProvider"]],
        // subject: "Build# ${env.BUILD_NUMBER} - Job: ${env.JOB_NUMBER} status is: ${currentBuild.currentResult}",
        // to: "e.amitthakur@gmail.com")
    }
}
}