kubernetes+springboot+CronJob 定时任务配置如下代码：

1. cronjob.yaml k8s 文件  

   apiVersion: batch/v1
   kind: CronJob
   metadata:name: k8s-springboot-demonamespace: rz-dt
   spec:failedJobsHistoryLimit: 3 #执行失败job任务保留数量successfulJobsHistoryLimit: 5 #执行成功job任务保留数量startingDeadlineSeconds: 180concurrencyPolicy: Forbidschedule: "*/1 * * * *" #每分钟执行一次jobTemplate:spec:template:spec:containers:- name: k8s-springboot-demoimage: rz-dt-image-server-registry-vpc.cn-shanghai.cr.aliyuncs.com/rz-dt/k8s-springboot-demo:$IMG_TAGimagePullPolicy: Always#command: ["java","-jar","/usr/local/cenobitor/k8s-springboot-demo.jar"]#dockerfile已有此处不需要配置args: ["sendEmail","sendEmail2"] # 配置任务类的名称volumeMounts:- name: time-configmountPath: /etc/localtimereadOnly: true#envFrom:# - configMapRef:#      name: smcp-config# - secretRef:#     name: smcp-service-secretresources:requests:cpu: "250m"memory: 216Milimits:cpu: "500m"memory: 512MirestartPolicy: Never#从私有仓库拉取镜像凭证imagePullSecrets:- name: rz-dt-miyue-vpcvolumes:- name: time-confighostPath:path: /usr/share/zoneinfo/Asia/Shanghai
   

2. Dockerfile 文件

   #基础镜像，如果本地仓库没有，会从远程仓库拉取 openjdk:8
   FROM openjdk:8
   #暴露端口
   EXPOSE 8089
   #容器中创建目录
   RUN mkdir -p /usr/local/cenobitor
   #编译后的jar包copy到容器中创建到目录内
   COPY target/k8s-springboot-demo.jar /usr/local/cenobitor/k8s-springboot-demo.jar
   #指定容器启动时要执行的命令
   ENTRYPOINT ["java","-jar","/usr/local/cenobitor/k8s-springboot-demo.jar"]
   

3. test.sh 文件

   echo "开始制作镜像..."
   image_tag=`date +%Y-%m-%d-%H-%M-%S` #_%H%M
   echo "当前时间：$image_tag"
   docker build -t k8s-springboot-demo:${image_tag} .
   echo "制作镜像成功!"echo "登录"
   sudo docker login --username=aliyun0398513152 rz-dt-image-server-registry-vpc.cn-shanghai.cr.aliyuncs.com --password=1234echo "镜像最新版本提交"
   docker tag k8s-springboot-demo:${image_tag} rz-dt-image-server-registry-vpc.cn-shanghai.cr.aliyuncs.com/rz-dt/k8s-springboot-demo:${image_tag}
   docker push rz-dt-image-server-registry-vpc.cn-shanghai.cr.aliyuncs.com/rz-dt/k8s-springboot-demo:${image_tag}echo "k8s一键部署"
   export IMG_TAG=${image_tag}
   envsubst < cronjob.yaml | kubectl --kubeconfig ~/.kube-rz/config apply -f -

   4个代码实现类：

4. package com.example.demo.job;public interface Command {/*** 遵循Unix约定，如果命令执行正常，则返回0；否则为非0。*/int execute(String... args);
   }package com.example.demo.job;import lombok.extern.slf4j.Slf4j;
   import org.springframework.stereotype.Component;@Component
   @Slf4j
   public class SendEmailCommand implements Command {@Overridepublic int execute(String... args) {try {// 省略业务逻辑代码for (String arg:args) {log.info("send email  success args：" +arg);}log.info("send email success");return 0;} catch (Exception e) {log.error("send email error", e);return -1;}}
   }package com.example.demo.job;import lombok.extern.slf4j.Slf4j;
   import org.springframework.stereotype.Component;@Component
   @Slf4j
   public class SendEmail2Command implements Command {@Overridepublic int execute(String... args) {try {// 省略业务逻辑代码for (String arg:args) {log.info("send email 2  success args：" +arg);}log.info("send email 2 success");return 0;} catch (Exception e) {log.error("send email error", e);return -1;}}
   }package com.example.demo.job;import lombok.extern.slf4j.Slf4j;
   import org.springframework.beans.factory.annotation.Autowired;
   import org.springframework.boot.CommandLineRunner;
   import org.springframework.stereotype.Component;import javax.annotation.PostConstruct;
   import java.util.Arrays;
   import java.util.HashMap;
   import java.util.Map;@Component
   @Slf4j
   public class ProjectCommandLineRunner implements CommandLineRunner {Map<String, Command> commandMap = new HashMap<>();@Autowiredprivate SendEmailCommand sendEmailCommand;@Autowiredprivate SendEmail2Command sendEmail2Command;@PostConstructprivate void init() {commandMap.put("sendEmail", sendEmailCommand);commandMap.put("sendEmail2", sendEmail2Command);}@Overridepublic void run(String... args) throws Exception {if (args.length == 0) {return;}if (!commandMap.containsKey(args[0])) {log.error("'{}' command not found", args[0]);System.exit(-1);}for (String arg:args) {log.info("command args：" +arg);}for (int i = 0; i < args.length; i++) {Command command =  commandMap.get(args[i]);String[] arguments = Arrays.copyOfRange(args, 0, args.length);command.execute(arguments);}//执行成功则，正常退出0, 异常退出非0System.exit(0);}
   }

kubectl 客户端执行，sh test.sh :