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DRBD - Revision history
2026-04-28T17:15:11Z
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Vvc at 03:45, 19 April 2011
2011-04-19T03:45:13Z
<p></p>
<p><b>New page</b></p><div>[[Category:DRBD]]<br />
* install modules<br />
yum install drbd83 kmod-drbd8-xen<br />
<br />
* adjust ethernet interface settings ''(opional)''<br />
Some ethernet interfaces require this for drbd to work properly<br />
:/sbin/ifup-local <br />
<source lang="bash"><br />
#!/bin/sh<br />
dev=$1<br />
if [ ${dev}x = eth0x ] ; then<br />
/sbin/ethtool -K eth0 tx off<br />
fi<br />
</source><br />
* create /etc/drbd.conf<br />
<pre><br />
global {<br />
usage-count no;<br />
}<br />
common {<br />
protocol C;<br />
startup {<br />
wfc-timeout 15;<br />
}<br />
syncer { <br />
rate 50M;<br />
verify-alg sha1;<br />
}<br />
# Fencing only works with pacemaker<br />
disk {<br />
on-io-error detach;<br />
fencing resource-only;<br />
}<br />
net {<br />
after-sb-0pri discard-zero-changes;<br />
}<br />
handlers {<br />
split-brain "/usr/lib/drbd/notify-split-brain.sh root";<br />
out-of-sync "/usr/lib/drbd/notify-out-of-sync.sh root";<br />
fence-peer "/usr/lib/drbd/crm-fence-peer.sh";<br />
after-resync-target "/usr/lib/drbd/crm-unfence-peer.sh"; <br />
}<br />
}<br />
resource u00 {<br />
on c20.chepkov.lan {<br />
device /dev/drbd0;<br />
disk /dev/xvda2;<br />
address 10.10.10.20:7789;<br />
flexible-meta-disk internal;<br />
}<br />
on c21.chepkov.lan {<br />
device /dev/drbd0;<br />
disk /dev/xvda2;<br />
address 10.10.10.21:7789;<br />
flexible-meta-disk internal;<br />
}<br />
}<br />
</pre><br />
<br />
* zero partition<br />
dd if=/dev/zero of=/dev/xvda2 bs=1M count=1<br />
sync<br />
<br />
* create device<br />
drbdadm create-md u00<br />
<br />
* load driver<br />
modprobe -s drbd `drbdadm sh-mod-parms`<br />
<br />
* create device node<br />
drbdadm up u00<br />
<br />
* create new array<br />
** fast on clean disks<br />
drbdadm -- --clear-bitmap new-current-uuid u00<br />
<br />
:* slow on disks used before<br />
drbdadm -- --overwrite-data-of-peer primary u00<br />
<br />
* make it primary on one node<br />
drbdadm primary u00<br />
<br />
* create filesystem<br />
mkfs -j /dev/drbd0<br />
<br />
* update fs parameters<br />
tune2fs -e continue -i 0 -c 0 /dev/drbd0<br />
<br />
[[Category:Linux]]<br />
[[Category:Cluster]]</div>
Vvc