内容:inotify-tools服务和sersync服务
介绍:1.inotify-tools是一种可监听系统指定文件发生的一系列增删改查动作事件并且可以实时的可视化的呈现出来工具,它可以提供两种工具;其一为inotifywait——实时监控文件或者目录发生的事件变化;其二为inotifywatch——可以统计文件访问的次数。
2.sersync是一款具有可以在不同服务器之间进行实时数据同步的工具
一、实时同步功能实现的实践(脚本和rsync)
NFS客户端
[root@nfs01 ~]# echo 'export RSYNC_PASSWORD=oldboy' >>/etc/bashrc
[root@nfs01 ~]# source /etc/bashrc
[root@nfs01 ~]# echo $RSYNC_PASSWORD
oldboy
1)测试推送
[root@nfs01 ~]# rsync -avz /data [email protected]::backup/
sending incremental file list
sent 164 bytes received 25 bytes 126.00 bytes/sec
total size is 0 speedup is 0.00
2)查看inotify支持情况
[root@nfs01 ~]# uname -r
3.10.0-957.5.1.el7.x86_64
[root@nfs01 ~]# ls -l /proc/sys/fs/inotify/
总用量 0
-rw-r--r-- 1 root root 0 4月 19 09:45 max_queued_events
-rw-r--r-- 1 root root 0 4月 19 09:45 max_user_instances
-rw-r--r-- 1 root root 0 4月 19 09:45 max_user_watches
3)安装inotify-tools
yum install epel-release -y
yum install inotify-tools -y
[root@nfs01 ~]# rpm -ql inotify-tools|head -2
/usr/bin/inotifywait
/usr/bin/inotifywatch
[root@nfs01 ~]# rpm -qa inotify-tools
inotify-tools-3.14-8.el7.x86_64
4)命令参数和事件知识
略
5)测试实践
inotifywait -mrq --timefmt '%d/%m/%y %H:%M' --format '%T %w%f' -e create /data
6)思考:实现数据复制
监控哪些事件?
增 改 删 需要监控
[root@nfs01 ~]# inotifywait -mrq --format '%w%f' -e close_write,delete /data
/data/a.txt
/data/a.txt
/data/a.txt
7)编写脚本
mkdir /server/scripts -p
rsync -az --delete /data/ [email protected]::backup
[root@nfs01 /server/scripts]# /bin/sh /server/scripts/monitor1.sh &
[2] 9199
[root@nfs01 /server/scripts]# tail -2 /etc/rc.local
########################
/bin/sh /server/scripts/monitor1.sh &
二、sersync实践
1)客户端推送成功
rsync -az /data [email protected]::backup
2)部署sersync服务(NFS)
wget https://github.com/wsgzao/sersync/blob/master/sersync2.5.4_64bit_binary_stable_final.tar.gz
sersync_oldboy_64bit_20160928.tar.gz
[root@nfs01 /server/tools]# mkdir /application -p
[root@nfs01 /server/tools]# mv application/sersync /application/
[root@nfs01 /server/tools]# tree /application/
/application/
└── sersync
├── bin
│ └── sersync
├── conf
│ ├── confxml.xml
│ └── confxml.xml.ori
├── logs
│ └── rsync_fail_log.sh
└── readme.txt
4 directories, 5 files
[root@nfs01 /server/tools]# cd /application/sersync/
[root@nfs01 /application/sersync]# ls
bin conf logs readme.txt
[root@nfs01 /application/sersync]# cd conf/
[root@nfs01 /application/sersync/conf]# ls
confxml.xml confxml.xml.ori
3)sersync配置文件:干两件事:
1)完成监控配置:
inotifywait -mrq --format '%w%f' -e createFolder,close_write,delete,moveFrom,moveTo /data
2)完整命令拼接:
rsync -az /data --timeout=100 [email protected]::backup
4)启动服务
[root@nfs01 /application/sersync/conf]# ../bin/sersync -h
set the system param
execute:echo 50000000 > /proc/sys/fs/inotify/max_user_watches
execute:echo 327679 > /proc/sys/fs/inotify/max_queued_events
parse the command param
_______________________________________________________
参数-d:启用守护进程模式
参数-r:在监控前,将监控目录与远程主机用rsync命令推送一遍
c参数-n: 指定开启守护线程的数量,默认为10个
参数-o:指定配置文件,默认使用confxml.xml文件
参数-m:单独启用其他模块,使用 -m refreshCDN 开启刷新CDN模块
参数-m:单独启用其他模块,使用 -m socket 开启socket模块
参数-m:单独启用其他模块,使用 -m http 开启http模块
不加-m参数,则默认执行同步程序
________________________________________________________________
[root@nfs01 /application/sersync/conf]# /application/sersync/bin/sersync -d -n 10 -o /application/sersync/conf/confxml.xml
最终
/application/sersync/bin/sersync -d
pkill sersync
二进制程序,不是yum安装的,所以不能systemctl start sersync
配置:systemctl start sersync启动方案
https://blog.51cto.com/oldboy/2155931
[root@nfs01 /data]# tail -1 /etc/rc.local
/application/sersync/bin/sersync -d
配置:systemctl start sersync启动方案
https://blog.51cto.com/oldboy/2155931
[root@nfs01 /data]# cat /etc/rc.d/init.d/sersync
#!/bin/bash
# chkconfig: 2345 21 81
# description: rsync service start and stop scripts
# Author: oldboy
# Organization: www.oldboyedu.com
start(){
/application/sersync/bin/sersync -d -o /application/sersync/conf/confxml.xml &>/dev/null
}
stop(){
killall sersync 2>/dev/null
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
sleep 2
start
;;
*)
echo $"Usage:$0 {start|stop|restart}"
exit 1
esac
chmod +x /etc/rc.d/init.d/sersync
[root@nfs01 /data]# cat /usr/lib/systemd/system/sersync.service
[Unit]
Description=sersyncd service
After=network.target
[Service]
Type=forking
ExecStart=/etc/rc.d/init.d/sersync start
ExecReload=/etc/rc.d/init.d/sersync restart
ExecStop=/etc/rc.d/init.d/sersync stop
PrivateTmp=true
[Install]
WantedBy=multi-user.target
chmod +x /usr/lib/systemd/system/sersync.service
[root@nfs01 /data]# systemctl enable sersync.service
Created symlink from /etc/systemd/system/multi-user.target.wants/sersync.service to /usr/lib/systemd/system/sersync.service.
[root@nfs01 /data]# systemctl status sersync.service
● sersync.service - sersyncd service
Loaded: loaded (/usr/lib/systemd/system/sersync.service; enabled; vendor preset: disabled)
Active: inactive (dead)
[root@nfs01 /data]# systemctl stop sersync
[root@nfs01 /data]# ps -ef|grep sersync|grep -v grep
[root@nfs01 /data]# systemctl start sersync