How to set the retention period for Golang logs on Debian

This article describes how to control the log file retention time of Golang applications on a Debian system. This usually requires the following steps:

1. Identify log library: First, determine which log library your Golang application uses, such as standard library log , logrus or zap . Different libraries have different configuration methods.

2. Log Rotation: Most log libraries need to be accompanied by log rotation tools to achieve automatic management of log files. logrotate is a commonly used tool.

Use the standard library log

The standard library log itself does not provide log rotation function, and requires logrotate .

1. Install logrotate :

    sudo apt-get install logrotate

2. Create a logrotate configuration file: Create a configuration file in the /etc/logrotate.d/ directory, such as myapp :

    sudo nano /etc/logrotate.d/myapp

3. Configure log rotation: Write the following content in the configuration file and replace /path/to/your/logfile.log as your log file path:

    <code>/path/to/your/logfile.log { daily rotate 7 compress delaycompress missingok notifempty create 640 root adm }</code>

   Configuration item description:

   • daily : Rotate once a day.
   • rotate 7 : Keep 7 log files.
   • compress : Compress old log files.
   • delaycompress : Delay compression until the next rotation.
   • missingok : No error is reported when the log file is lost.
   • notifempty : The log file does not rotate when it is empty.
   • create 640 root adm : Create a new log file with permissions of 640, the owner is root, and the group is adm.

Using the logrus library

logrus is a popular log library that does not directly support log rotation, and also needs to be used with logrotate . After configuring logrus output to the file, use the above logrotate configuration.

Using zap library

zap is a high-performance log library. Although it does not directly provide logrotate -like functionality, its flexible configuration allows you to output logs to files and then use logrotate to manage the retention period of log files.

Through the above steps, combined with the log library you use, you can effectively manage the log files of your Golang application on the Debian system and control its retention period. Remember to adjust the parameters in the logrotate configuration file according to the actual situation.

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