设置log rotation避免tomcat catalina.out文件增长过大

创建logrotate配置文件

$ vi /etc/logrotate.d/tomcat

添加以下内容：

/opt/entermediadb/tomcat/logs/catalina.out {
  copytruncate
  daily
  rotate 7
  compress
  missingok
  dateext
  size 100m
}

参数说明：

specify the path to the log file.
copytruncate – creates a copy of the log file and then truncates the original to an empty file so that the service can keep on logging uninterrupted.
daily – rotates the catalina.out daily.
rotate – keeps at most 7 log files.
compress – create a gzip compressed file of the rotated files.
missingok – suppresses error messages if the file does not exist.
dateext – add the date to the filename of the archived log file.
size – rotates if the size of catalina.out is bigger than 100m.

在大多数linux系统上都可以找到文件：/etc/cron.daily/logrotate，该文件每天都会被运行。运行时会调用：

/usr/sbin/logrotate /etc/logrotate.conf

这样就会rotate掉tomcat的日志。
如果有多个tomcat实例，就需要配置多个单独的rotation文件。

也可以手动编写定时任务：

2 * * * * /usr/sbin/logrotate /etc/mylogrotate.d/tomcat