linux日志轮询logrotate不执行的排故方法【原创】

故障现象

有个系统服务器重新搭建部署应用后发现nginx日志不轮询。手动执行logrotate命令能成功，但是自动执行不成功。

排查问题思路如下：

1、先看下配置文件是否正确，可以先手动执行

logrotate /etc/logrotate.conf

2、看下logrotate执行的结果

# cat /var/lib/logrotate.status
logrotate state -- version 2
"/var/log/ConsoleKit/history" 2020-8-1
"/var/log/yum.log" 2020-7-28
"/var/log/salt/key" 2020-8-8
"/app/logs/http_error.log" 2020-9-18
"/var/log/dracut.log" 2020-7-28
"/var/log/salt/master" 2020-8-8
"/var/log/wtmp" 2020-7-28
"/app/logs/https_error.log" 2020-9-18
"/var/log/spooler" 2020-9-13
"/var/log/btmp" 2020-9-1
"/var/log/puppet/*log" 2020-9-17
"/var/log/xferlog" 2020-9-5
"/app/logs/http_access_combined.log" 2020-9-18
"/var/log/maillog" 2020-9-13
"/var/log/secure" 2020-9-13
"/var/log/salt/minion" 2020-9-13
"/app/logs/http_access.log" 2020-9-18
"/app/logs/https_access.log" 2020-9-18
"/var/log/messages" 2020-9-13
"/var/account/pacct" 2020-7-28
"/var/log/cron" 2020-9-13
"/var/log/vsftpd.log" 2020-9-5

3、logrotate是crontab执行的，涉及到以下俩个文件

# cat /etc/cron.daily/logrotate
#!/bin/sh

/usr/sbin/logrotate /etc/logrotate.conf
EXITVALUE=$?
if [ $EXITVALUE != 0 ]; then
    /usr/bin/logger -t logrotate "ALERT exited abnormally with [$EXITVALUE]"
fi
exit 0

有的服务还会在crontab设置定时执行，我的没有这个文件。

cat /etc/cron.d/nginx 
55 23 * * * root sleep `perl -e "print int(rand(120))"` && /usr/sbin/logrotate -v -f /usr/local/nginx/conf/logrotate.conf

4、由于并没有发现问题，我的日志轮询不生效，为了先解决问题，只能自己写个crontab了

# 日志轮询
0 0 * * * /usr/sbin/logrotate /etc/logrotate.conf

参考

Nginx日志归档logrotate配置失效不执行的问题排查记录 - 服务端开发 http://tabalt.net/blog/nginx-logrotate-execution-failure/