Winston transport for Node.js

Winston transport for Node.js clustering.
Uses IPC to send log information from cluster workers to the master process for file based or other single threaded logging.

#!/usr/bin/env node var cluster = require('cluster'); var winston = require('winston'); var winstonCluster = require('./lib/winston-cluster'); var logLevel = 'info'; if (cluster.isMaster) { // Create parent thread logger // Other transports (ie. file writing) should be bound to this var logger = new winston.Logger({ transports: [ new winston.transports.Console({ level: logLevel, }), ] }); // Start child threads var cpuCount = require('os').cpus().length; for (var i = 0; i < cpuCount; i++) { cluster.fork(); } // Bind event listeners to child threads using the local logger instance // has to be called after the child threads are started. winstonCluster.bindListeners(logger); // Logging works as normal in the main thread logger.info("Started server!") // Server thread logic here // ... } else { // Create a new logger instance for the child thread using the cluster transport to // send data back to the parent thread. // Note that log level must also be set here to avoid filtering prior to sending logs back var logger = winston.createLogger({transports: [ new winstonCluster({ level: logLevel, }), ]}) // Logging in this instance now passed via IPC back to the parent // (and tagged with the worker thread ID) logger.info("Test Message!") // Client thread logic here // ... } Binding Multiple Logger Instances

See example-multi-logger.js for an example on binding multiple logger instances.