База знаний » GNU/Linux

h1. 1. nbd (debian)

h2. На сервере

*apt-get install qemu-utils* не ниже 2.1

*qemu-nbd -p 2000 -b 192.168.122.101 -f raw /dev/ssd6/hermes-storage &*

h2. На клиенте

*nbd-client 192.168.122.101 2000 /dev/nbd0*

<pre>

Negotiation: ..size = 716800MB

bs=1024, sz=751619276800 bytes

</pre>

*vi /etc/lvm/lvm.conf*

<pre>

filter = [ "a|^/dev/[hs]d[a-f][0-9]$|", "a|^/dev/nbd[0-9]+$|", "r/.*/" ]

</pre>

*pvcreate /dev/nbd0*

h1. nbd (gentoo)

h2. На сервере

<pre>

lvcreate -L 210g -n temp-space vg-name

qemu-nbd -p 51621 -b 172.31.53.254 -f raw /dev/vg-name/temp-space &

</pre>

h2. На клиенте

<pre>

modprobe nbd

modprobe raid1

echo 1 > /sys/module/raid1/parameters/max_queued_requests

echo 30000 > /proc/sys/dev/raid/speed_limit_max

busybox nbd-client 172.31.53.254 51621 /dev/nbd0

# sed -i '/filter = /s:"r|/dev/nbd.*|", ::' /etc/lvm/lvm.conf

pvcreate /dev/nbd0

vgextend data /dev/nbd0

lvconvert -m1 --type raid1 data/static /dev/nbd0

lvs

</pre>

<pre>

  LV     VG      Attr       LSize   Pool Origin Data%  Move Log Cpy%Sync Convert

  static data    rwi-aor--- 200.00g                                 0.15     

</pre>

h2. После завершения синхронизации

<pre>

umount /dev/mapper/data-static

NAME=static; lvconvert --splitmirrors 1 --name $NAME.copy data/$NAME /dev/nbd0 && lvchange -an data/$NAME.copy

vgsplit data data.copy /dev/nbd0

sync

ps axuwwf | grep busybox

kill -9 2085

</pre>