CentOS7的/tmp目录自动清理规则
CentOS6以下系统(含)使用watchtmp + cron来实现定时清理临时文件的效果,这点在CentOS7发生了变化,在CentOS7下,系统使用systemd管理易变与临时文件,与之相关的系统服务有3个:
systemd-tmpfiles-setup.service :Create Volatile Files and Directories
systemd-tmpfiles-setup-dev.service:Create static device nodes in /dev
systemd-tmpfiles-clean.service :Cleanup of Temporary Directories
相关的配置文件也有3个地方:
/etc/tmpfiles.d/*.conf
/run/tmpfiles.d/*.conf
/usr/lib/tmpfiles.d/*.conf
/tmp目录的清理规则主要取决于/usr/lib/tmpfiles.d/tmp.conf文件的设定,默认的配置内容为:
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation; either version 2.1 of the License, or
# (at your option) any later version.
# See tmpfiles.d(5) for details
# Clear tmp directories separately, to make them easier to override
v /tmp 1777 root root 10d # 清理/tmp下10天前的目录和文件
v /var/tmp 1777 root root 30d # 清理/var/tmp下30天前的目录和文件
# Exclude namespace mountpoints created with PrivateTmp=yes
x /tmp/systemd-private-%b-*
X /tmp/systemd-private-%b-*/tmp
x /var/tmp/systemd-private-%b-*
X /var/tmp/systemd-private-%b-*/tmp
我们可以配置这个文件,比如你不想让系统自动清理/tmp下以tomcat开头的目录,那么增加下面这条内容到配置文件中即可:
x /tmp/tomcat.*
更多配置内容参考:tmpfiles.d 中文手册
http://www.jinbuguo.com/systemd/tmpfiles.d.html
转自:http://blog.51cto.com/kusorz/2051877