lsyncd安装与使用——实战

lsyncd 使用文件系统事件接口（inotify或fsevents）来监视对本地文件和目录的更改。

参考文章

lsyncd实时同步搭建指南——取代rsync+inotify
rsync安装与使用——实战

环境

• system: centos8
• version: rsync-3.1.3， lsyncd-2.2.2

节点架构

源主机：数据来源的主机
目标主机：备份数据的主机

	源主机	目标主机
节点名	node001	node002
节点地址	192.168.1.2	192.168.1.3
组件安装	lsyncd（服务端）rsync（客户端，服务端）	rsync（客户端，服务端）

自定义脚本参数

	变量名	变量默认值	说明
rsync	backup_user	rsync_backup	虚拟用户名称，备份专用
	backup_passwd	123456	虚拟用户密码，备份专用
	backup_module	backup	备份模块名，包含具体备份路径，见/etc/rsyncd.conf配置
	backup_path	/root/rsyncd_backup	备份路径
lsyncd	local_src		本地需要同步的文件路径
	local_dst		本地备份的目标路径
	local_rsync_passwd_file	/root/rsyncd_backup	rsync密码文件，来自rsync客户端虚拟用户
	remote_host	/root/rsyncd_backup	目标主机地址
	remote_rsyncd_user	/root/rsyncd_backup	虚拟用户名称
	remote_rsyncd_module	backup	备份模块名，同rsync的backup_module

安装

# yum安装
yum install lsyncd
# 安装验证
lsyncd --version

配置

备份配置文件

mv /etc/lsyncd.conf /etc/lsyncd.conf.bkb

修改配置文件 /etc/lsyncd.conf

• 全局配置参数 settings

cat > /etc/lsyncd.conf << EOF
settings {
logfile = "/var/log/lsyncd/lsyncd.log",
pidfile = "/var/run/lsyncd.pid",
statusFile = "/var/log/lsyncd/lsyncd.status",
statusInterval = 5,
inotifyMode = "CloseWrite",
maxProcesses = 7,
maxDelays = 1,
nodaemon =true
}

• direct模式（未测试）

local_src="/root/local_workspace/lsyncd_workspace/test/src"
local_dst="/root/local_workspace/lsyncd_workspace/test/dst"

cat >> /etc/lsyncd.conf << EOF
sync {
default.direct,
source = $local_src,
target = $local_dst,
delay = 1,
maxProcesses = 2
}
EOF

• rsync模式（已测试）

local_src="/root/local_workspace/lsyncd_workspace/test/src"
local_dst="/root/local_workspace/lsyncd_workspace/test/dst"

cat >> /etc/lsyncd.conf << EOF
sync {
default.rsync,
source = $local_src,
target = $local_dst,
excludeFrom = "/etc/rsyncd.d/rsync_exclude.lst",

rsync = {
binary = "/usr/bin/rsync",
archive = true,
compress = true,
bwlimit = 2000
}
}
EOF

• rsync + rsyncd模式（已测试）

local_src="/root/local_workspace/lsyncd_workspace/test/src"
remote_host="192.168.1.3"
remote_rsyncd_user="rsync_backup"
remote_rsyncd_module="backup"
backup_path="/root/rsync_backup"

# 远程备份主机的 rsyncd.conf
cat > /etc/rsyncd.conf <<EOF
[$remote_rsyncd_module]
path = $backup_path
comment = dst test data
EOF

# 本地源主机的 rsyncd.conf
cat >> /etc/lsyncd.conf << EOF
sync {
default.rsync,
source = $local_src,
target = "$backup_user@$remote_host::$remote_rsyncd_module",
delete = "running",
exclude = { ".*", ".tmp" },
delay = 30,
init = false,
rsync = {
binary = "/usr/bin/rsync",
archive = true,
compress = true,
verbose = true,
password_file = "/etc/rsync.$remote_rsyncd_user.passwd",
_extra = {"--bwlimit=200"}
}
}
EOF

• rsync + ssh模式（未测试）

local_src="/root/local_workspace/lsyncd_workspace/test/src"
remote_host="192.168.1.3"
remote_user="root"
remote_dst="/root/test_lsyncd_dst"

cat >> /etc/lsyncd.conf << EOF
sync {
default.rsync,
source = $local_src,
target = "$remote_user@$remote_host:$remote_dst",
delay = 30,
init = false,
rsync = {
binary = "/usr/bin/rsync",
archive = true,
compress = true,
bwlimit = 2000
rsh = "/usr/bin/ssh -p 22 -o StrictHostKeyChecking=no",
}
}
EOF

• rsyncssh模式（未测试）

local_src="/root/local_workspace/lsyncd_workspace/test/src"
remote_host="192.168.1.2"
remote_user="root"
remote_dst="/root/test_lsyncd_dst"

cat >> /etc/lsyncd.conf << EOF
sync {
default.rsyncssh,
source = $local_src,
host = "$remote_host",
targetdir = "$remote_dst",
delay = 30,
init = false,
rsync = {
binary = "/usr/bin/rsync",
archive = true,
compress = true,
_extra = {"--bwlimit = 2000"}
}
ssh = {
port = 22
}
}
EOF