Node Cluster - replace worker.js file with code-CodePudding

The below example is from Node Documentation :

import cluster from 'cluster';

cluster.setupPrimary({
  exec: 'worker.js',
  args: ['--use', 'https'],
  silent: true
});
cluster.fork(); // https worker
cluster.setupPrimary({
  exec: 'worker.js',
  args: ['--use', 'http']
});
cluster.fork(); // http worker

When packaging the application into a redistributable binary, exec: 'worker.js' is problematic the worker.js has to be packaged along with the exe. Is there a way to tell cluster to look at a piece of code instead?

CodePudding user response：

Yes, of course. That's the usual behavior of cluster when not using the new .setupPrimary method. You can use the env argument of .fork() to pass arguments:

import cluster from 'cluster';

if (cluster.isPrimary) {
  cluster.fork({use: 'https'});
  cluster.fork({use: 'http'});
} else {
  if (process.env.use && process.env.use == 'https') {
    // code for https worker
  } else if (process.env.use && process.env.use == 'http') {
    // code for http worker
  } else {
    console.log("missing 'use' environment variable in worker");
  }
}