java - How do you use cron jobs using Elastic Beanstalk and Java?

Question

I want to run cron jobs and use the same code base. I found a few solutions, but they don't appear ideal. For example, with Heroku, you can add a Scheduler element and fill in the commands to run in a web page.

• http://blog.rotaready.com/scheduled-tasks-elastic-beanstalk-cron/
  • It seems overly complicated for load-balanced instances.
  • It makes use of require('async') in Node, but what would be a Java Spring Boot equivalent?
• https://docs.aws.amazon.com/elasticbeanstalk/latest/dg/using-features-managing-env-tiers.html
  • There doesn't appear to be any security. Any one the net could access the /path to POST and execute the job, causing a denial-of-service attack.
  • it mentions cron.yaml which doesn't make sense as the app is deployed via a WAR/ZIP file to a Tomcat instance (Spring Boot).
  • It mentions Amazon DynamoDB, which we don't use. We use MySQL.
  • It doesn't specify whether the load balancer connection draining timeout is in effect for these jobs (10s).
  • It mentions "Worker Configuration card on the Configuration page in the environment management console" but there is no Worker Configuration card under Configuration page.
• Running a cron job in Elastic Beanstalk
  • For Python/Django - uses cron.yaml.
• I thought of just having a dedicated EC2 instance, but how can I deploy the latest code changes there?

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标签： javaamazon-web-servicesspring-bootcronamazon-elastic-beanstalk

Answer 1

使用其他 AWS 系统有一种简单的方法可以做到这一点。

您可以使用 CloudWatch 设置计划事件 ( https://docs.aws.amazon.com/AmazonCloudWatch/latest/events/WhatIsCloudWatchEvents.html )。您可以设置规则以按既定时间表设置事件。

然后，您至少有两个选择：

• 将事件设置为发布 SNS 消息并使用该 SNS 在您的服务器上调用 Web 挂钩。关于如何执行此操作的许多示例，但您必须确保检查签名以确保从签名的 SNS 调用 Web API。但这将使用公共 API，可能不是您喜欢的。

• 设置事件以发布 SQS 消息。然后设置一个弹性 beanstalk worker 来处理 SQS 消息，或者只是在你的主服务器上运行一个后台脚本，这基本上是一个无限循环轮询 SQS 的工作。

不确定您对这些系统的熟悉程度，因此不确定是否清楚我在说什么，但没有办法给出详细的解决方案，所以希望这足以给您提供想法。