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Hi Kemal,<br>
<br>
I had some bad experience with the stock Ubuntu 12.04 drbd8
packages. For example in the past they delivered an old drbd8-utils
version (8.3.11) with a more recent kernel module (8.4.2). Today
(with all repos active) you get drbd8-utils 8.4.3 with module 8.4.2
which is ok, but I don't want to rely on a cluster where an
dist-upgrade could break my drbd.<br>
In my opinion Dirk did right to compile the module on his own. The
docs at drbd.org are straight forward and I didn't have to change
anything in the code. Be sure to compile with "--with-km" as
building the module isn't default.<br>
<br>
Another point with your setup: You wrote that you want the VM(s) to
failover.<br>
For this setup you do not need necessarily an active/active config.
If the cluster node running your VM fails, the other node cannot
live migrate any more. <br>
But it is possible to configure cluster and drbd temporarily into
maintenance and active/active respectively for live migration during
planned downtime.<br>
My favorite setup for a VM cluster uses KVM and DRBD as backing
devices, so I don't have to mount anything between the "promote" of
drbd-device and the "start" of KVM. This setup should work in nearly
the same way with Xen, because you can use the same resource agent
in your cluster config. I didn't use Xen for a couple of years, so I
cannot privide detailed information here, sorry.<br>
<br>
Regards,<br>
Mathias<br>
<br>
<br>
<div class="moz-cite-prefix">Am 17.05.2014 04:23, schrieb kamal
kishi:<br>
</div>
<blockquote
cite="mid:CAGghF8od2Z6b+2fHxCA_tuAM_KmYfPjBrZhXo3RxhwoBaDVAhg@mail.gmail.com"
type="cite">
<div dir="ltr">
<div>Thank you Dirk, may i know if you changed any settings in
source code while compiling DRBD or just compiled the default
one.<br>
<br>
</div>
Anyone know why the folders are not created?</div>
<div class="gmail_extra">
<br>
<br>
<div class="gmail_quote">On Fri, May 16, 2014 at 5:37 PM, Dirk
Bonenkamp - ProActive <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:dirk@proactive.nl"
target="_blank">dirk@proactive.nl</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF"> Hi,<br>
<br>
I'm running production with 12.04. I use DRDB version
8.4.4, which I've compiled myself.<br>
<br>
Pacemaker / corosync is stock ubuntu.<br>
<br>
I'm using a master slave setup. I've done quite some test
with master/ master and OCFS2 and never was satisfied.
Performance was 'sub optimal'.<br>
<br>
My current setup works excellent!<br>
<br>
Kind regards,<br>
<br>
Dirk<br>
<br>
<br>
<br>
<br>
<br>
<div>kamal kishi schreef op 16-5-2014 6:52:<br>
</div>
<blockquote type="cite">
<div>
<div class="h5">
<div dir="ltr">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>Hi all,<br>
<br>
</div>
I'm trying to configure
DRBD+Pacemaker+XEN+OCFS2 for
ACTIVE/ACTIVE VM failover.<br>
<br>
</div>
I'm stuck at the first step itself,
installing and configuring Pacemaker
to handle DRBD.<br>
<br>
</div>
There are 2 issues I'm facing :<br>
</div>
1. After installing DRBD using "apt-get
install drbd8-utils", the
/dev/drbd/by-res/r0 or
/dev/drbd/by-disk/disk_name folders are
not created by itself (Few months back I
had followed same procedure to install
DRBD, it created the folders mentioned
above)<br>
</div>
As this /dev/drbd/by-res/r0 used for
configuring Pacemaker, putting this query<br>
<br>
</div>
2. Although the above mentioned folders are
not created, running DRBD manually works
fine.<br>
</div>
When integrated with pacemaker to handle DRBD,
DRBD doesn't start at all.<br>
</div>
Find the attached logs for DRBD and Pacemaker
configuration used and the logs from 2 servers<br>
<br>
</div>
<div>Request :<br>
</div>
<div>Can anyone please suggest best UBUNTU( or any
other OS suggestion also fine), DRBD and
Pacemaker versions which works fine to be used
in production level<br>
<br>
</div>
Looking for a solution as same is to be deployed
in Production Servers :(<br>
<br>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>-- <br>
Regards,<br>
Kamal Kishore B V<br>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
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