node.js - 如何为 koajs 服务器做优雅的停止？

Question

expressjs优雅停止的例子很多，koajs如何实现？

我也想断开数据库连接

我有一个 mongoose 数据库连接和 2 个 oracle 数据库连接 ( https://github.com/oracle/node-oracledb )

Answer 1

前段时间我创建了一个 npm 包 http-graceful-shutdown ( https://github.com/sebhildebrandt/http-graceful-shutdown )。这与 http、express 和 koa 完美配合。由于您还想添加自己的清理功能，因此我修改了包，这样您现在就可以添加自己的清理功能，该功能将在关机时调用。所以基本上这个包处理所有 http 关闭事情加上调用你的清理函数(如果在选项中提供):

const koa = require('koa');
const gracefulShutdown = require('http-graceful-shutdown');
const app = new koa();

...
server = app.listen(...); // app can be an express OR koa app
...

// your personal cleanup function - this one takes one second to complete
function cleanup() {
  return new Promise((resolve) => {
    console.log('... in cleanup')
    setTimeout(function() {
        console.log('... cleanup finished');
        resolve();
    }, 1000)       
  });
}

// this enables the graceful shutdown with advanced options
gracefulShutdown(server,
    {
        signals: 'SIGINT SIGTERM',
        timeout: 30000,
        development: false,
        onShutdown: cleanup,
        finally: function() {
            console.log('Server gracefulls shutted down.....')
        }
    }
);