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koa-hot

v0.0.3

Published

一个koa服务的平滑启动小工具

Downloads

10

Readme

介绍

一个koa服务的平滑启动小工具

实现原理

【start】在主进程中fork出n(n取决你机器的cpu核数)个子进程,在子进程中启动你的koa服务。

【gracefulReload】会给主进程发一个SIGHUP信号,告诉主进程要平滑重启了。然后主进程会告诉子进程,子进程收到通知后,先disconnect, 然后子进程退出,再在主进程中 fork出一个子进程。递归上述,直到把所有的子进程重启结束。

关于验证存量请求是否能够正常响应

用example中的app.js即可验证,该koa服务中get请求: http://127.0.0.1:5000 延时5s返回结果。你可以先一个终端请求:curl http://127.0.0.1:5000。 然后进行gracefulReload操作,你会发现该请求会在5s后返回结果。

另外,可以查看example/test.js文件,里面有操作步骤。

使用步骤

  1. 全局安装 npm install koa-hot -g

  2. 启动koa应用【后面跟koa应用的入口文件的绝对路径】 koa-hot start --path /xxx/app.js

  3. 平滑重启koa应用【后面跟 主进程的pid】 koa-hot gracefulReload --pid 11111

开发者

  1. clone代码到本地 git clone [email protected]:SKHon/koa-graceful-reload.git

  2. 进入项目中bin目录下 cd koa-graceful-reload/bin

  3. 启动exapmle应用 node koa-hot start --path ../example/app.js

  4. 平滑启动app.js node koa-hot gracefulReload --pid 54734 ../example/app.js