cluster.setupMaster([settings])

• settings <Object> 详见 cluster.settings。

用于修改默认'fork' 行为。一旦调用，将会按照cluster.settings进行设置。

注意:

• 所有的设置只对后来的 .fork()调用有效，对之前的工作进程无影响。
• 唯一无法通过 .setupMaster()设置的属性是传递给.fork()的env属性。
• 上述的默认值只在第一次调用时有效，当后续调用时，将采用cluster.setupMaster()调用时的当前值。

例子:

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

只能由主进程调用。

• settings <Object> See cluster.settings.

setupMaster is used to change the default 'fork' behavior. Once called, the settings will be present in cluster.settings.

Note that:

• Any settings changes only affect future calls to .fork() and have no effect on workers that are already running.
• The only attribute of a worker that cannot be set via .setupMaster() is the env passed to .fork().
• The defaults above apply to the first call only, the defaults for later calls is the current value at the time of cluster.setupMaster() is called.

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

This can only be called from the master process.