Log-cutting operation in operational dimension (Logrotate/python/shell script implementation)

The Logrotate program is a log file management tool. Used to split log files, delete old log files, and create new log files that play a "dump" role. can save disk space. The following is a logrotate log rotation operation to do a comb record:

1 Configuration file Introduction
The Linux system defaults to installing the Logrotate tool, which defaults to the configuration file in:
/etc/logrotate.conf
/etc/logrotate.d/

Logrotate.conf is the main configuration file, LOGROTATE.D is a directory, all the files in the directory will be actively read into the/etc/logrotate.conf execution.
In addition, if the/etc/logrotate.d/inside the file does not set some details, it will be/etc/logrotate.conf this file as the default value of the setting.

Logrotate is run based on Cron, whose script is/etc/cron.daily/logrotate, and the log rotation is automated by the system.
When you actually run, Logrotate invokes the configuration file/etc/logrotate.conf.
You can place a custom profile in the/ETC/LOGROTATE.D directory to override the Logrotate defaults.

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[Root@huanqiu_web1 ~] # cat/etc/cron.daily/logrotate #!/bin/sh/usr/sbin/logrotate/etc/logrotate. conf >/dev/null 2>&1 exitvalue=$?  If [$EXITVALUE!= 0]; Then/usr/bin/logger-t logrotate "ALERT exited abnormally with [$EXITVALUE]" fi exit 0

If you can't wait for cron to automate the log rotation, you want to manually force the cut log, you need to add the-f parameter, but it's best to verify it with the Debug option before you do it (-D parameter), which is also important for debugging
#/usr/sbin/logrotate-f/etc/logrotate.d/nginx
#/usr/sbin/logrotate-d-f/etc/logrotate.d/nginx

Logrotate command format:
Logrotate [OPTION ...] <configfile>
-D,--debug:debug mode, test the configuration file for errors.
-F,--force: Force dump file.
-M,--mail=command: After compressing the log, send the log to the specified mailbox.
-S,--state=statefile: Using the specified state file.
-V,--verbose: Shows the dump process.

Action based on log cutting settings and display details
[Root@huanqiu_web1 ~]#/usr/sbin/logrotate-v/etc/logrotate.conf
[Root@huanqiu_web1 ~]#/usr/sbin/logrotate-v/etc/logrotate.d/php

Executes according to the log cutting settings and displays details, but does not do any specific work, debug mode
[Root@huanqiu_web1 ~]#/usr/sbin/logrotate-d/etc/logrotate.conf
[Root@huanqiu_web1 ~]#/usr/sbin/logrotate-d/etc/logrotate.d/nginx

View the individual log file implementation
[Root@fangfull_web1 ~]# Cat/var/lib/logrotate.status

2) Cutting Introduction
For example, the system log/var/log/message to do the cutting to simply explain: