问题描述
如果我错了,请纠正我,但是不可能在同一端口上启动多个http服务器。
Correct me if I am wrong, but it isn't possible to start multiple http-servers on the same port.
基于此,NodeJS很有趣群集可能会分叉。因为我知道有主人将请求传递给其中一个派生的工人。哪些工作程序由操作系统或 = rr进行管理
Based on this it is interesting the NodeJS cluster may fork. Of cause I know there is the master what is passing the request to one of the forked workers. What worker is managed by operating system or cluster.schedulingPolicy= "rr" for "round robin".
要点是:每个工作人员都需要自己的内存,所以您需要的内存是x的多倍,其中x是工作人员的数量
但是如果我想从节点应用程序中运行不同的(子)域,我也希望保留in_memory数据库的不同部分(例如,简单的JSON文件) )绑定到(子)域。或基于 subdomain.example.tdl / resource1 / whatever
之类的资源。
But if I like to run different (sub)domains out of my node app, I also like to hold different parts of an in_memory database (e.g. a simple JSON file) bound to a (sub)domain. OR based on resources like subdomain.example.tdl/resource1/whatever
.
可能。
在我看来这应该是可行的,因为我可以基于请求对象(res.url)和资源(params)进行路由不同的现有中间件。
In my opinion it should be possible, because I can route based on request-objects (res.url) and resources (params) by different existing middleware.
这样,应该有可能告诉主服务器将请求传递给特定的分支实例。
So that way it should be possible to tell the master to pass the request to a specific forked instance.
推荐答案
这是可能的:您需要在主服务器上创建网络服务器,然后通过规则将连接传递给工人http服务器:
It's possible: you need create net server at master, and pass connection by you rules to workers http server:
var cluster = require('cluster');
if (cluster.isMaster) {
var workers = [];
// Create workers
for (var i=0; i<require('os').cpus().length; i++) {
workers[i] = cluster.fork({WORKER_INDEX:i, JSON_INDEX:i});
}
// Create net server at master
var server = require('net').createServer({pauseOnConnect:true}, function(c) {
var b = Math.floor( Math.random()*workers.length );
workers[b].send("doit",c);
}).listen(3000);
} else {
// Load specific data for worker (pass parametr JSON_INDEX)
var json = "{default:default}";
try {
json = require("fs").readFileSync('./data_'+process.env.JSON_INDEX+'.json');
} catch (e) {}
// Create http server and pass specific json to client
var server = require('http').createServer( function(req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end(json);
}).listen(0,'127.0.0.1');
// Get message from master and check if need pass to http server
process.on('message', function(m,c) {
if ( "doit" === m ) {
server.emit('connection', c);
c.resume();
}
});
}
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