SpringBoot 3 生产 K8s 部署手册

1. Jenkins 全局工具配置

工具 版本 安装方式 备注
JDK 17 自动安装 命名 jdk17
Maven 3.9.5 自动安装 命名 maven3.9.5

路径：
Manage Jenkins → Global Tool Configuration → 分别新增 JDK & Maven，Name 必须与 pipeline 中 tools 块保持一致。

2. 基础镜像准备（openjdk:17-slim）

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# 1. 拉取官方镜像
docker pull openjdk:17-slim

# 2. 重打 tag（指向私有 Harbor）
docker tag openjdk:17-slim 172.31.10.118/library/openjdk:17-slim

# 3. 登录并推送
docker login 172.31.10.118 -u admin -p Harbor12345
docker push 172.31.10.118/library/openjdk:17-slim

3. Jenkins 流水线（完整 Jenkinsfile）

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pipeline {
    agent any

    tools {
        jdk 'jdk17'
        maven 'maven3.9.5'
    }

    environment {
        docker_directory = 'docker'
        serverport       = ''
    }

    stages {
        stage('SCM') {
            steps {
                checkout([$class: 'GitSCM',
                          branches: [[name: '${branch}']],
                          doGenerateSubmoduleConfigurations: false,
                          extensions: [],
                          submoduleCfg: [],
                          userRemoteConfigs: [[credentialsId: 'xjcares_git',
                                               url: 'http://172.31.70.132:33788/xjcares/xjkygpt.git']]])
                sh 'echo "nodefinished:<$(date +\'%Y-%m-%d %H:%M:%S\')>"'
            }
        }

        stage('Build core') {
            steps {
                sh '''
                cd core-paas-component
                mvn clean deploy -Dmaven.test.skip=true -U
                '''
                sh 'echo "nodefinished:<$(date +\'%Y-%m-%d %H:%M:%S\')>"'
            }
        }

        stage('Build') {
            steps {
                sh '''
                cd ${module}
                mvn clean package -Dmaven.test.skip=true -U
                '''
                sh 'echo "nodefinished:<$(date +\'%Y-%m-%d %H:%M:%S\')>"'
            }
        }

        stage('Build & Push Image') {
            steps {
                sh '''
                docker login -u admin -p Harbor12345 172.31.10.118
                cd ${module}/target

                BUILD_TAG=$(date +%Y%m%d-%H%M%S)-${BUILD_NUMBER}
                REPOSITORY=172.31.10.118/xjcares/${module}:${BUILD_TAG}
                JAR_FILE=$(ls *.jar | head -n 1)

                cat > Dockerfile <<EOF
FROM 172.31.10.118/library/openjdk:17-slim
ENV TZ=PRC
RUN ln -snf /usr/share/zoneinfo/\$TZ /etc/localtime && echo \$TZ > /etc/timezone
ADD ${JAR_FILE} /${module}.jar
ENTRYPOINT ["java","-jar","-Xms${memory}","-Xmx${memory}","-Denv=pro","/${module}.jar","--spring.profiles.active=prod"]
EOF

                docker build -t $REPOSITORY .
                docker push $REPOSITORY
                echo "$REPOSITORY" > ../../IMAGE_TAG.txt
                docker logout 172.31.10.118
                docker rmi $REPOSITORY
                '''
            }
        }

        stage('Deploy to K8s') {
            steps {
                kubeconfig(caCertificate: '',
                           credentialsId: 'snowlotus-kubeconfig',
                           serverUrl: '') {
                    sh '''
                    cd ${module}/target/classes
                    prop_value=$(grep -w ^server.port application.properties | cut -d= -f2)
                    cd ../../..

                    NEW_IMAGE_TAG=$(cat IMAGE_TAG.txt)

                    sed -i "s|IMAGE_PLACEHOLDER|${NEW_IMAGE_TAG}|g" podTemplate.yaml
                    sed -i "s|PODNAME|${module}|g"           podTemplate.yaml
                    sed -i "s|PORT|${prop_value}|g"          podTemplate.yaml
                    sed -i "s|INSTANCENUM|${instanceNum}|g"  podTemplate.yaml

                    kubectl delete -f podTemplate.yaml --ignore-not-found=true
                    kubectl apply  -f podTemplate.yaml
                    '''
                }
            }
        }
    }

    post {
        always {
            cleanWs()
        }
    }
}

4. SpringBoot 2 → 3