k8s之根据tag发布spring boot项目

2024-01-14 16:48:16

#（1）根据dockerfile构建基础镜像
1）dockerfile

#mkdir /temp/basic
#cd /temp/basic 
#cat dockerfile 
FROM java:8
MAINTAINER wangfang
RUN /bin/cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
        && echo 'Asia/Shanghai' >/etc/timezone

2）构建

docker build registry.cn-hangzhou.aliyuncs.com/wangfang-k8s/java:v1 . 
docker push registry.cn-hangzhou.aliyuncs.com/wangfang-k8s/java:v1

#（2）根据打包生成的jar包生成新的dockerfile文件

1）dockerfile

#mkdir /temp/release; cd /temp/release
#cat dockerfile 
FROM registry.cn-hangzhou.aliyuncs.com/wangfang-k8s/java:v1
ADD demo-0.0.1-SNAPSHOT.jar /
WORKDIR /
EXPOSE 8080
ENTRYPOINT ["java","-jar","demo-0.0.1-SNAPSHOT.jar"]

#（3）准备项目的资源配置清单

1）deployment对象资源配置清单文件

#cd /temp/release 
# cat springboot-test.yaml 
apiVersion: apps/v1beta2
kind: Deployment
metadata:
    name: springboot-test-deployment
spec:
    strategy:
        rollingUpdate:
            maxSurge: 25%
            maxUnavailable: 25%
        type: RollingUpdate
    replicas: 2
    selector:
        matchLabels:
            app: springboot-test
    template:
        metadata:
            labels:
                app: springboot-test
        spec:
            containers:
            - name: springboot-test
                image: registry.cn-hangzhou.aliyuncs.com/wangfang-k8s/springboot-test:tag
                ports:
                - containerPort: 8080
                resources:
                    requests:
                        memory: "256Mi"
                        cpu: "256m"
                    limits:
                        memory: "512Mi"
                        cpu: "512m"
                livenessProbe:
                    httpGet:
                        path: /
                        port: 8080
                    initialDelaySeconds: 20
                    periodSeconds: 3
                    successThreshold: 1
                    failureThreshold: 3
                readinessProbe:
                    httpGet:
                        path: /
                        port: 8080
                    initialDelaySeconds: 20
                    periodSeconds: 3
                    successThreshold: 1
                    failureThreshold: 3

2）service对象资源配置清单文件

# cat springboot-test-service.yaml 
apiVersion: v1 
kind: Service 
metadata: 
    name: springboot-test-service
spec: 
    selector:      
        app: springboot-test
    type: NodePort
    ports: 
    - name: http 
        protocol: TCP
        port: 8080
        targetPort: 8080
        nodePort: 33333
    type: NodePort

#（3）配置jenkins
1）丢弃旧的构建

2）参数化构建过程

3）配置tag

4）配置git仓库地址

5）配置打包命令

6）ssh到jenkins服务器, 这台机器我配置的也是kubectl客户端;
命令说明:
把打包生成的jar包拷贝到工作目录, 根据tag构建新的镜像,
实验演示我是推送到阿里云的容器镜像仓库, 生产环境建议部署habor开源镜像仓库, 速度更快
然后根据tag把资源配置的tag里面替换成真实的tag;
最后根据资源配置清单文件发布项目

cd /temp/release
\cp /var/lib/jenkins/workspace/test/target/demo-0.0.1-SNAPSHOT.jar .
docker build -t registry.cn-hangzhou.aliyuncs.com/wangfang-k8s/springboot-test:${tag} .
docker login --username=your_name registry.cn-hangzhou.aliyuncs.com --password=your_password
docker push registry.cn-hangzhou.aliyuncs.com/wangfang-k8s/springboot-test:${tag} 
sed -ri "s/tag/${tag}/g" springboot-test.yaml
kubectl apply -f .