javascript node.js http 服务器如何获取连接数

node.js http server how to get connections count

提问by Manuel

I'm using node as a http server with the following code:

我使用 node 作为 http 服务器，代码如下：

http.createServer(function(req, res) {}).listen(8181);

I'm looking for a simple way to monitor a node js http server from within the same process. For me it would be enough to have a own function which just outputs the current resource usage and connection count as json. For now I don't need deep measuring or real time performance monitoring.

我正在寻找一种简单的方法来从同一进程中监视节点 js http 服务器。对我来说，拥有一个自己的函数就足够了，该函数仅将当前资源使用情况和连接计数输出为 json。目前我不需要深度测量或实时性能监控。

What are the key performance indicators for a node http server and is it possible to get them from node? If yes how? What you think of the folling kpi's:

节点 http 服务器的关键性能指标是什么，是否可以从节点获取它们？如果是如何？您对以下 kpi 的看法：

1. Connection Count
2. CPU Usage
3. Ram Usage

1. 连接数
2. CPU使用率
3. 内存使用

Just need to know which variables/functions I need to get the data?

只需要知道我需要哪些变量/函数来获取数据？

Thx I really appreciate your help

Thx 我真的很感谢你的帮助

回答by David Gatti

You can get the amount of connection using a built in function of NodeJS. Check getConnections. Bellow an example how to use it:

您可以使用 NodeJS 的内置函数获取连接量。检查getConnections。下面是一个如何使用它的例子：

var server = http.createServer(app);    

server.getConnections(function(error, count) {

    console.log(count);

});

I hope this is what you were looking for :)

我希望这就是你要找的:)

回答by micnic

You need something like this:

你需要这样的东西：

var count = 0;

http.createServer(function(req, res) {
    count++;
    res.on('finish', function () {
        //setTimeout(function () {
        count--;
        //}, 60000);
    }).on('close', function () {
        count--;
    });
}).listen(8181);

With setTimeout()you can get the active connections in the last 1 minute.

有了setTimeout()你可以在最后1分钟的活动连接。

see http://nodejs.org/api/os.html#os_os_cpusfor CPU usage

有关 CPU 使用情况，请参阅http://nodejs.org/api/os.html#os_os_cpus

see http://nodejs.org/api/process.html#process_process_memoryusagefor memory usage

有关内存使用情况，请参阅http://nodejs.org/api/process.html#process_process_memoryusage

回答by codemeasandwich

scribblesis a logging module I created.

scribbles是我创建的日志记录模块。

You can just drop in you project and get CPU, Mem& Netout of the box + more some other handy flags & metrics.

您可以直接加入您的项目并立即获得CPU、Mem和Net以及其他一些方便的标志和指标。

Checkout the performance-monitoringpart.

查看性能监控部分。

To use:

使用：

const scribbles = require('scribbles');

scribbles.config({
   dataOut:console.log
})

setInterval(function(){
  scribbles.status();
}, 5000);

// This will give you a performance snapshot every 5 seconds.

You get:

你得到：

• network: Networking info

  • port: listening on this Port
  • connections: number of current established connections

• state: the state of the services. e.g. "up", "blocking"

• cpu: CPU info
  • cores: number of available cores
  • model: description of the processor
  • speed: MHz frequency speed
  • percUsed: load on process as percentage
  • percFree: available on process as percentage
• sys: System info
  • startedAt: when it's system was started
  • arch: platform architecture. e.g "x64"
  • platform: the operating system platform
  • totalMem: the total megabytes of memory being used
  • freeMem: the total megabytes of memory free
  • usedMem: the total megabytes of memory being used
• process:
  • percUsedCpu: the percentage of processing power being used by this process
  • percFreeMem: the percentage of memory being used by this process
  • usedMem: the total megabytes of memory being used by this process
  • startedAt: when it's process was started
  • pTitle: the current process title (i.e. returns the current value of ps)
  • pid: the ID of the process
  • ppid: the ID of the current parent process
  • user: node the name of the user who started node
  • vNode: version of node

• 网络：网络信息

  • 端口：监听这个端口
  • 连接数：当前建立的连接数

• 状态：服务的状态。例如“向上”、“阻塞”

• cpu：CPU信息
  • 核心数：可用核心数
  • 型号：处理器说明
  • 速度：MHz频率速度
  • percUsed：进程负载百分比
  • percFree：在进程中可用的百分比
• sys：系统信息
  • startAt：系统启动的时间
  • arch：平台架构。例如“x64”
  • 平台：操作系统平台
  • totalMem：正在使用的总内存兆字节
  • freeMem：可用内存的总兆字节数
  • usedMem：正在使用的总内存兆字节
• 过程：
  • percUsedCpu：此进程使用的处理能力百分比
  • percFreeMem：此进程使用的内存百分比
  • usedMem：此进程使用的总内存兆字节
  • startAt：进程开始的时间
  • pTitle：当前进程标题（即返回ps的当前值）
  • pid：进程ID
  • ppid：当前父进程的ID
  • user: node 启动节点的用户名
  • vNode：节点的版本