pm2 log 压缩

本文介绍了如何使用PM2的logrotate模块自动管理和压缩由PM2管理的进程的日志。详细阐述了安装方法,配置参数如文件大小限制、保留日志数量、启用gzip压缩、检查间隔等,并提供了设置这些值的示例。

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Description

PM2 module to automatically rotate logs of processes managed by PM2.

Install

pm2 install pm2-logrotate

To install a specific version use the @<version> suffix

pm2 install pm2-logrotate@2.2.0

Configure

  • max_size (Defaults to 10M): When a file size becomes higher than this value it will rotate it (its possible that the worker check the file after it actually pass the limit) . You can specify the unit at then end: 10G10M10K
  • retain (Defaults to 30 file logs): This number is the number of rotated logs that are keep at any one time, it means that if you have retain = 7 you will have at most 7 rotated logs and your current one.
  • compress (Defaults to false): Enable compression via gzip for all rotated logs
  • dateFormat (Defaults to YYYY-MM-DD_HH-mm-ss) : Format of the data used the name the file of log
  • rotateModule (Defaults to true) : Rotate the log of pm2's module like other apps
  • workerInterval (Defaults to 30 in secs) : You can control at which interval the worker is checking the log's size (minimum is 1)
  • rotateInterval (Defaults to 0 0 * * * everyday at midnight): This cron is used to a force rotate when executed. We are using node-schedule to schedule cron, so all valid cron for node-schedule is valid cron for this option. Cron style :
  • TZ (Defaults to system time): This is the standard tz database timezone used to offset the log file saved. For instance, a value of Etc/GMT-1, with an hourly log, will save a file at hour 14 GMT with hour 13GMT-1 in the log name.
*    *    *    *    *    *
┬    ┬    ┬    ┬    ┬    ┬
│    │    │    │    │    |
│    │    │    │    │    └ day of week (0 - 7) (0 or 7 is Sun)
│    │    │    │    └───── month (1 - 12)
│    │    │    └────────── day of month (1 - 31)
│    │    └─────────────── hour (0 - 23)
│    └──────────────────── minute (0 - 59)
└───────────────────────── second (0 - 59, OPTIONAL)

How to set these values ?

After having installed the module you have to type : pm2 set pm2-logrotate:<param> <value>

e.g:

  • pm2 set pm2-logrotate:max_size 1K (1KB)
  • pm2 set pm2-logrotate:compress true (compress logs when rotated)
  • pm2 set pm2-logrotate:rotateInterval '*/1 * * * *' (force rotate every minute)

https://www.npmjs.com/package/pm2-logrotate

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