SocketCluster - A Highly parallelized WebSocket server cluster to make the most of multi-core machines/instances.
Complete documentation available at: http://socketcluster.io/
21 June 2015 (v2.2.30)
Added a 'handshake' event on SCServer - This event gets triggered as soon as the SCSocket object is created (before the 'connection' event is triggered). It's a good place to add error-handling logic on the socket or to decorate your SCSocket object with custom properties/plugins. You generally shouldn't start interacting with the SCSocket at this stage - You should do that in the 'connection' event; after handshake has been completed.
14 June 2015 (v2.2.26)
Note that there has been an important fix in iocluster (a submodule of SC). The iocluster module is the one which provides the scServer.global object. There was a major bug which prevented it from storing data properly. This has been fixed in iocluster v2.4.6. To update iocluster on an existing app, you should:
rm -R -f ./node_modules/iocluster
npm cache clean
npm install iocluster
This is only relevant if you want to use the global object to store volatile data, otherwise it shouldn't affect SC in any way.
6 June 2015 (v2.2.25)
4 May 2015 (v2.2.9)
SC2 is now the default version of SocketCluster so to install SC2, it's now:
npm install -g socketcluster
socketcluster create myProject
You can still install SC1, but the package name has changed:
npm install -g sc1
sc1 create myProject
SocketCluster is a fast, highly scalable HTTP + realtime server engine which lets you build multi-process realtime servers that make use of all CPU cores on a machine/instance. It removes the limitations of having to run your Node.js server as a single thread and makes your backend resilient by automatically recovering from worker crashes and aggregating errors into a central log.
Follow the project on Twitter: https://twitter.com/SocketCluster Subscribe for updates: http://socketcluster.launchrock.com/
SocketCluster has been tested for memory leaks. The last full memory profiling was done on SocketCluster v0.9.17 (Node.js v0.10.28) and included checks on load balancer, worker and store processes.
No memory leaks were detected when using the latest Node.js version. Note that leaks were found when using Node.js versions below v0.10.22 - This is probably the Node.js 'Walmart' memory leak - Not a SocketCluster issue.
There are two ways to install SocketCluster.
Setup the socketcluster command:
npm install -g socketcluster
sudo npm install -g socketcluster
socketcluster create myapp
Once it's installed, go to your new myapp/ directory and launch with:
Access at URL http://localhost:8000/
npm install socketcluster
You will also need to install the client separately which you can get using the following command:
npm install socketcluster-client
The socketcluster-client script is called socketcluster.js (located in the main socketcluster-client directory)
It is recommended that you use Node.js version >=0.10.22 due to memory leaks present in older versions.
In order to run SocketCluster over HTTPS, all you need to do is set the protocol to 'https' and provide your private key and certificate as a start option when you instantiate SocketCluster - Example:
var socketCluster =balancers: 1workers: 3stores: 3port: 8000appName: 'myapp'workerController: 'worker.js'protocol: 'https'protocolOptions:key: fsreadFileSync__dirname + '/keys/enc_key.pem' 'utf8'cert: fsreadFileSync__dirname + '/keys/cert.pem' 'utf8'passphrase: 'passphase4privkey';
The protocolOptions option is exactly the same as the one you pass to a standard Node HTTPS server: http://nodejs.org/api/https.html#https_https_createserver_options_requestlistener
Note that encryption/decryption in SocketCluster happens at the LoadBalancer level (SocketCluster launches one or more lightweight load balancers to distribute traffic evenly between your SocketCluster workers). LoadBalancers are responsible for encrypting/decrypting all network traffic. What this means is that your code (which is in the worker layer) will only ever deal with raw HTTP traffic.
To contribute; clone this repo, then cd inside it and then run npm install to install all dependencies.
(The MIT License)
Copyright (c) 2013-2015 TopCloud
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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