PM2 管理 PHP 脚本 - 集群模式

Question

Currently i'm successfully managing some PHP deamons (single instance) with PM2, and, so far so good!

With PM2 and while managing Node.js/IO.js apps, i can launch them in cluster mode on PM2 with no stress! The same does not happen with the mentioned php deamons!

So, first of all, is it even possible to manage/launch clustered instances of a PHP script using PM2 (or is that PM2 feature only usable on Node.js/IO.js scripts)?

If so (possible to do), what special "tuneups" are required to cluster the PHP scripts with PM2!?

While trying to launch some pm2 start xxx.php -i 2 --name XXX , i get the following error @ the error log path:

SyntaxError: Unexpected token <
    at Module._compile (module.js:439:25)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function._load (/usr/local/lib/node_modules/pm2/node_modules/pmx/lib/transaction.js:62:21)
    at /usr/local/lib/node_modules/pm2/lib/ProcessContainer.js:200:23
    at /usr/local/lib/node_modules/pm2/node_modules/async/lib/async.js:52:16
    at /usr/local/lib/node_modules/pm2/node_modules/async/lib/async.js:1209:30
    at WriteStream.<anonymous> (/usr/local/lib/node_modules/pm2/lib/Utility.js:126:13)
    at WriteStream.EventEmitter.emit (events.js:95:17)

... that makes me believe that it can't even parse the given PHP file!

Thanks in advance for any help on this!

Answer 1

Short answer: you can't use cluster mode with php.

The pm2 cluster mode only works with javascript. Internally it's using the nodejs cluster module and requiring your script ( code line ). This also explains your error, pm2 tries to execute the php code with javascript (hence the SyntaxError ).

When using fork mode, it's using your interpreter (here php) to launch the script. This is why you can also run python or ruby on top of nodejs!