V2V

一共有 4 個步驟

1. 設定目標主機的 rsyncd
2. First time sync data
3. Config VPS & Test
4. Final sync

Install rsyncd

dnf install rsync-daemon       # R8

設定目標主機的 rsyncd

/etc/rsyncd.conf

use chroot = yes
max connections = 4
timeout = 300
log file = /var/log/rsyncd.log
strict modes = yes
uid = root
gid = root
list = no
port = 1873
strict modes = yes
secrets file = /etc/rsyncd.secrets

[mailserver]
    path = /lxc/mail/rootfs
    read only = no
    auth users = mailserver

PW File

touch /etc/rsyncd.secrets

chmod 600 /etc/rsyncd.secrets

Enable Service

systemctl restart rsyncd

Firewall

firewall-cmd --permanent \
--add-rich-rule='rule family="ipv4" source address="x.x.x.x" port protocol="tcp" port="1873" accept'
firewall-cmd --reload

First time sync data

On Source

mkdir /root/v2v/

touch /root/v2v/pw.txt; chmod 600 /root/v2v/pw.txt

# 只 sync "/", 不 sync data

mkdir /mnt/rootfs

mount -o noatime /dev/sda3 /mnt/rootfs

/root/v2v/v2v-first.sh

#!/bin/bash
#
# use rsyncd with password sync Local to Remote host
#

Dst=R.R.R.R
Port=1873                 # 不用 default port
Module=mailserver
bwlimit=8192              # 80 MB/s
LogPath=/root/v2v
Src=/mnt/rootfs

echo -n "Are you want to run v2v script?(y/n) "
read input
if [ "$input" == "y" ]
then
    rm -f $LogPath/file1.log $LogPath/err1.log 2> /dev/null
    echo "Start: `date +%H:%M:%S`"
    rsync -avzAHX --numeric-ids ${Src}/ \
        --exclude-from=/root/v2v/exclude1.txt \
        --bwlimit=$bwlimit \
        --password-file=/root/v2v/pw.txt \
        rsync://$Module@$Dst:$Port/$Module > $LogPath/file1.log 2> $LogPath/err1.log
    echo "End: `date +%H:%M:%S`"
fi
echo "Done"

/root/v2v/exclude1.txt

# Folders
lost+found
/sys/*
/proc/*
/dev/*
/boot/*
/tmp/*
/selinux/*
/cgroup/*
# Files
aquota.group
aquota.user
# Cust
/root/v2v
/backup/*
/mnt/backup/*
_X

Remark

 * 不使用 sshd 而用 rsyncd 原因是因為它不用加密, CPU 佔用率較低

Config VPS & Test

A) Config VPS

...

B) Test

測試閞機 (在 lxc hypervisor)

# 用 "-F" for debug

lxc-start -n ispconfig -F

Final sync

exclude2.txt

# Folders
lost+found
/sys/*
/proc/*
/dev/*
/boot/*
/tmp/*
/selinux/*
/cgroup/*
# Files
aquota.group
aquota.user
# Cust
/root/v2v
/backup/*
/mnt/backup/*
_X
# 第二次不用 rsync 以下 folder, 因為它們已有 lxc 的 setting
/etc
/root

v2v-final.sh

#!/bin/bash
# Final sync

Dst=R.R.R.R
Port=1873                 # 不用 default port
Module=mailserver
bwlimit=8192              # 80 MB/s
LogPath=/root/v2v
Src=/mnt/rootfs

echo -n "Are you want to run v2v script?(y/n) "
read input
if [ "$input" == "y" ]
then
    rm -f $LogPath/file2.log $LogPath/err2.log 2> /dev/null
    echo "Start: `date +%H:%M:%S`"
    rsync -avzAHX --numeric-ids --delete ${Src}/ \
        --exclude-from=/root/v2v/exclude2.txt \
        --bwlimit=$bwlimit \
        --password-file=/root/v2v/pw.txt \
        rsync://$Module@$Dst:$Port/$Module > $LogPath/file2.log 2> $LogPath/err2.log
    echo "End: `date +%H:%M:%S`"
fi
echo "Done"