Bunyan是一個對于node.js services的簡單和快速JSON日志庫。

var bunyan = require('bunyan');
var log = bunyan.createLogger({name: "myapp"});
log.info("hi");

還有一個 bunyan CLI 工具用來更好地查看這些日志：

特性

• elegant log method API
• extensible streams system for controlling where log records go (to a stream, to a file, log file rotation, etc.)
• bunyan CLI for pretty-printing and filtering of Bunyan logs
• simple include of log call source location (file, line, function) withsrc: true
• lightweight specialization of Logger instances with log.child
• custom rendering of logged objects with "serializers"
• Runtime log snooping via Dtrace support
• Support for browserify. See Browserify section below.

項目主頁：http://www.baiduhome.net/lib/view/home/1417166051065