node.js 温斯顿：如何轮换日志
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Winston: how to rotate logs
提问by Sparky1
How can I rotate logs when using Winston to handle logging for node.js. That is, how can I create a new file for each day the app runs?
使用 Winston 处理 node.js 的日志记录时如何轮换日志。也就是说，如何为应用程序运行的每一天创建一个新文件？
var logger = new (winston.Logger)({
transports: [
new (winston.transports.Console)(),
new (winston.transports.File)({ filename: '2012-07-09.log' })
]
});
logger.log('info', 'Test Log Message', { anything: 'This is metadata' });
采纳答案by indexzero
winston author and maintainer here.
温斯顿作者和维护者在这里。
Logging to a new file everyday is currently an open feature request: https://github.com/flatiron/winston/issues/10. Would love to see someone implement it.
每天登录一个新文件目前是一个开放的功能请求：https: //github.com/flatiron/winston/issues/10。很想看到有人实施它。
That said, there are other options:
也就是说，还有其他选择：
The File transport accepts a maxsize option which will rotate the logfile when it exceeds a certain size in bytes.
There is also an open pull-request with a new transport I haven't had a chance to really dig into "fileRotate", which it seems does this kind of date-based rotation: https://github.com/flatiron/winston/pull/120/files
文件传输接受 maxsize 选项，当日志文件超过特定大小（以字节为单位）时，该选项将旋转日志文件。
还有一个带有新传输的公开拉取请求，我还没有机会真正深入研究“fileRotate”，它似乎是这种基于日期的轮换：https: //github.com/flatiron/winston /拉/120/文件
回答by Muki Buki
The feature is present and we are using it in production, winston.transports.DailyRotateFile:
该功能存在，我们正在生产中使用它，winston.transports.DailyRotateFile：
var timeFormatFn = function() {
'use strict';
return moment().format(cfg.timeFormat);
};
var logger = new(winston.Logger)({
exitOnError: false,
transports: [
new(winston.transports.DailyRotateFile)({
filename: cfg.appLogName,
dirname: __dirname + '/../' + cfg.logsDirectory,
datePattern: cfg.rollingDatePattern,
timestamp: timeFormatFn
}),
new(winston.transports.Console)({
colorize: true,
timestamp: timeFormatFn
})
]
});
回答by izhar ahmad
You can use the following code to rotate the log files daily:
您可以使用以下代码每天轮换日志文件：
var winston = require('winston');
require('winston-daily-rotate-file');
var transport = new (winston.transports.DailyRotateFile)({
filename: './log',
datePattern: 'yyyy-MM-dd.',
prepend: true,
level: info
});
var logger = new (winston.Logger)({
transports: [
transport
]
});
logger.info('Hello World!');
回答by DanArl
According to the author of winston-filerotatedateit is a:
根据winston-filerotatedate的作者，它是一个：
File transport for winston that allows the log files to be rotated depending on size and time.
The File transport accepts a filename via the 'filename' option and uses that file as the primary logging target. Should the file grow past 'maxsize' bytes then the current log file is renamed and a new primary log tile is created. The name of the renamed log file is formated as such 'basenameYYYYMMDD[a-z].bak'.
Available options are:
- level:Level of messages that this transport should log.
- silent:Boolean flag indicating whether to suppress output.
- timestamp:Boolean flag indicating if we should prepend output with timestamps (default true). If function is specified, its return value will be used instead of timestamps.
- filename:The filename of the logfile to write output to.
- dirname:The folder the logfile will be created in.
- maxsize:Max size in bytes of the logfile, if the size is exceeded then a new file is created.
- json:If true, messages will be logged as JSON (default true).
winston 的文件传输，允许根据大小和时间轮换日志文件。
文件传输通过 'filename' 选项接受文件名，并将该文件用作主要的日志记录目标。如果文件增长超过 'maxsize' 字节，则重命名当前日志文件并创建新的主日志磁贴。重命名的日志文件的名称格式为“basenameYYYYMMDD[az].bak”。
可用选项有：
- level：此传输应记录的消息级别。
- 静音：布尔标志，指示是否抑制输出。
- 时间戳：布尔标志，指示我们是否应该在输出前加上时间戳（默认为 true）。如果指定了函数，则将使用其返回值而不是时间戳。
- 文件名：要写入输出的日志文件的文件名。
- dirname：将在其中创建日志文件的文件夹。
- maxsize：日志文件的最大字节数，如果超过大小，则创建一个新文件。
- json：如果为 true，消息将被记录为 JSON（默认为 true）。
回答by Pejvan
As of Dec 18, 2012, this feature is now available in Winston (see https://github.com/flatiron/winston/pull/205)
截至 2012 年 12 月 18 日，此功能现已在 Winston 中可用（请参阅https://github.com/flatiron/winston/pull/205）
