E-mail: 1226032602@qq.com

Official documents

https://axkibe.github.io/lsyncd/
https://github.com/axkibe/lsyncd

brief introduction

Lsyncd uses file system event interfaces (inotify or fsevents) to monitor changes to local files and directories. Lsyncd organizes these events for a few seconds and then generates one or more processes to synchronize changes to the remote file system. The default synchronization method is rsync
Lsyncd is a lightweight real-time mirror solution. Lsyncd is relatively easy to install and does not require new file systems or block devices. Lysncd does not interfere with local file system performance

Fine-grained customization can be achieved through configuration files. Custom operation configurations can even be written from scratch, from shell scripts to code written in Lua

Version requirements

Lsyncd 2.2.1 requires Rsync > = 3.1 on all source and target computers

install

lsyncd in epel source

yum install lsyncd

To configure

Configuration file description/etc/lsyncd.conf
lsyncd configuration files are written in lua grammar

settings
settings {
logfile    log file
pidfile    pid file
nodaemon   Indicates that daemon mode is not enabled by default
statusFile   Running status file
statusInterval   take lsyncd The state of the statusFile Interval, default 10 seconds
inotifyMode     Appoint inotify Monitored events, default is CloseWrite，It can also be Modify or CloseWrite or Modify
maxProcesses    Maximum number of processes
maxDelays     How many monitoring events are synchronized once,even if delay Time is synchronized before it arrives
}

Three modes of sync

default.rsync

sync {
 default.rsync,
 source = "/tmp/src",
 target = "172.29.88.223:/tmp/dest",
 maxDelays = 5,
 delay = 30,
-- init = true,
rsync = {
 binary = "/usr/bin/rsync",
 archive = true,
 compress = true,
 bwlimit = 2000
 rsh = "/usr/bin/ssh -p 22 -o StrictHostKeyChecking=no"
}
}

rsync daemon

sync {
 default.rsync,
 source = "/tmp/src",
 target = "rsync_backup@172.16.1.41::backup",
 delete="running",
 exclude = { ".*", ".tmp" },
 delay = 3,
 init = false,
rsync = {
 binary = "/usr/bin/rsync",
 archive = true,
 compress = true,
 verbose = true,
 password_file = "/etc/rsync.pwd",
 _extra = {"--bwlimit=200"}
}
}

default.rsyncssh

sync {
   default.rsyncssh,
   source="/srcdir",
   host="remotehost",
   excludeFrom="/etc/lsyncd.exclude",
   targetdir="/dstdir",
   rsync = {
     archive = true,
     compress = false,
     whole_file = false
   },
   ssh = {
     port = 1234
   }
}

default.direct

sync {
    default.direct,
    source  = "/home/user/src/",
    target  = "/home/user/trg/"
}

/etc/lsyncd.conf

settings {
 logfile = "/var/log/lsyncd/lsyncd.log",
 statusFile = "/var/log/lsyncd/lsyncd.status",
 inotifyMode = "CloseWrite",
 maxProcesses = 8,
}
sync {
 default.rsync,
 source = "/tmp/src",
 target = "rsync_backup@172.16.1.41::backup",
 delete="running",
 exclude = { ".*", ".tmp" },
 delay = 3,
 init = false,
rsync = {
 binary = "/usr/bin/rsync",
 archive = true,
 compress = true,
 verbose = true,
 password_file = "/etc/rsync.pwd",
 _extra = {"--bwlimit=200"}
}
}
sync {
 default.rsync,
 source = "/tmp/src",
 target = "rsync_backup@172.16.1.41::wuxing",
 delete="running",
 exclude = { ".*", ".tmp" },
 delay = 3,
 init = false,
rsync = {
 binary = "/usr/bin/rsync",
 archive = true,
 compress = true,
 verbose = true,
 password_file = "/etc/rsync.pwd",
 _extra = {"--bwlimit=200"}
}
}

delete

delete	=	true       #Delete content that is not in the source on the target. Contents deleted at startup and during normal operation
delete	=	false      #No files on the target will be deleted. Not on startup or normal operation
delete	=	'startup'  # Lsyncd will delete files on the target at startup, but not during normal operation
delete	=	'running'  # Lsyncd does not delete files on the target at startup, but deletes files deleted during normal operation

settings {
 logfile = "/var/log/lsyncd/lsyncd.log",
 statusFile = "/var/log/lsyncd/lsyncd.status",
 inotifyMode = "CloseWrite",
 maxProcesses = 8,
}
sync {
 default.rsync,
 source = "/data",
 target = "rsync_backup@backup::backup",
 delete= true,
 exclude = { ".*" },
 delay = 1,
rsync = {
 binary = "/usr/bin/rsync",
 archive = true,
 compress = true,
 verbose = true,
 password_file = "/etc/rsync.pwd",
 _extra = {"--bwlimit=200"}
}
}