k8s之根據tag發佈spring boot項目

原創

wfwf1990

2019-03-09 13:37

#（1）根據dockerfile構建基礎鏡像
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）構建

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

#（2）根據打包生成的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）準備項目的資源配置清單

1）deployment對象資源配置清單文件

#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對象資源配置清單文件

# 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）丟棄舊的構建

2）參數化構建過程

3）配置tag

4）配置git倉庫地址

5）配置打包命令

6）ssh到jenkins服務器, 這臺機器我配置的也是kubectl客戶端;
命令說明:
把打包生成的jar包拷貝到工作目錄, 根據tag構建新的鏡像,
實驗演示我是推送到阿里雲的容器鏡像倉庫, 生產環境建議部署habor開源鏡像倉庫, 速度更快
然後根據tag把資源配置的tag裏面替換成真實的tag;
最後根據資源配置清單文件發佈項目

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 .