armbian清理_N1盒子armbian/ubuntu/linux系统修改日志输出到内存

N1盒子的存储设备是emmc，为了延长emmc的使用寿命尽可能的将读写文件在内存中完成。

修改systemd journald日志存放目录为内存，也就是/run/log目录，限制最大使用内存空间64MB：sed -i 's/#Storage=auto/Storage=volatile/' /etc/systemd/journald.conf

sed -i 's/#RuntimeMaxUse=/RuntimeMaxUse=64M/' /etc/systemd/journald.conf

然后重新启动systemd-journald服务：systemctl restart systemd-journald

修改rsyslog日志存放目录为/run/log：sed -i 's/\/var\/log/\/run\/log/g' /etc/rsyslog.d/50-default.conf

修改rsyslog运行用户为root，不然/run/log没写入权限：sed 's/PrivDropToUser syslog/PrivDropToUser root/' /etc/rsyslog.conf

sed 's/PrivDropToUser syslog/PrivDropToGroup root/' /etc/rsyslog.conf

然后重启rsyslog即可：systemctl restart rsyslog

修改nginx日志目录：sed -i 's/\/var\/log/\/run\/log/g' /etc/nginx/nginx.conf

mkdir /run/log/nginx

systemctl restart nginx

修改php-fpm日志目录：sed -i 's/\/var\/log/\/run\/log/g' /etc/php/7.2/fpm/php-fpm.conf

systemctl restart php7.2-fpm

cups修改日志目录：sed -i 's/\/var\/log/\/run\/log/g' /etc/cups/cups-files.conf

mkdir /run/log/cups

systemctl restart cups

samba修改配置文件日志目录：log file = /run/log/samba/log.%m

max log size = 50mkdir /run/log/samba

systemctl restart smbd

添加个开机启动脚本在启动时创建/run/log目录下nginx cups samba目录。cat /lib/systemd/system/mklogdir.service

[Unit]

Description=mklogdir

Before=network.target

[Service]

Type=oneshot

ExecStart=/usr/bin/mklogdir.sh

[Install]

WantedBy=multi-user.target

修改日志轮询logrotate：sed -i 's/\/var\/log/\/run\/log/g' /etc/logrotate.d/cups-daemon

sed -i 's/\/var\/log/\/run\/log/g' /etc/logrotate.d/nginx

sed -i 's/\/var\/log/\/run\/log/g' /etc/logrotate.d/php7.2-fpm

sed -i 's/\/var\/log/\/run\/log/g' /etc/logrotate.d/rsyslog

sed -i 's/\/var\/log/\/run\/log/g' /etc/logrotate.d/samba

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