how to keep variables that share all node processes in node cluster?

Question

It seems like all the node woker processes are working as if it is executing a new copy of the same application. But would like to keep some variables that are shared by all nod

Answer 1

You can try to communicate between master process and child processes. For example:

script test.master.js:

var cluster = require('cluster');
var childScript = __dirname + '/test.child.js';

cluster.setupMaster({ exec: childScript });

proc = cluster.fork();
proc.on('message', function(message) {
    console.log('message from child: ', message);
    proc.send('Hello from master!');
});

script test.child.js:

console.log('Child initializing..');

process.on('message', function(message) {
    console.log('message from master: ', message);
});

process.send('Hello from Child!');