Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On April 3, 2008, Florian Haas wrote:
> Dmitry,
>
> since you haven't told us us the error message with with Xen "refuses to
> start up",
sorry - was in a rush to get things done. Your hint did help, but for
archival, here's the message (note: domU name is "drbd"):
# xm create drbd
Using config file "/etc/xen/drbd".
No handlers could be found for logger "xend"
Error: Disk isn't accessible
Usage: xm create <ConfigFile> [options] [vars]
....
config files:
# cat /etc/xen/drbd
name = "drbd"
uuid = "b8c9d96d-bb98-95a1-2b68-04e6e973cd5f"
maxmem = 512
memory = 512
vcpus = 1
bootloader = "/usr/bin/pygrub"
on_poweroff = "destroy"
on_reboot = "restart"
on_crash = "restart"
# vfb = [ "type=vnc,vncunused=1" ]
# disk = [ "phy:/dev/drbd1,xvda,w" ]
disk = [ "drbd:test,xvda,w" ]
vif = [ "mac=00:16:3e:00:ee:af,bridge=xenbr0" ]
# cat /etc/drbd.conf
...
resource test {
net {
allow-two-primaries;
}
syncer {
rate 110M;
}
on foobar.com {
device /dev/drbd1;
disk /dev/xen/drbd.test;
address 10.10.10.11:7789;
meta-disk internal;
}
on barfoo.com {
device /dev/drbd1;
disk /dev/xen/drbd.test;
address 10.10.10.12:7789;
meta-disk internal;
}
}
As you see from above initially I've used /dev/drbd1 for install and tried to
switch to drbd:test after.
I'm using stock RedHat EL5 with the only custom thing - DRBD (packages built
by linbit).
# rpm -q drbd
drbd-8.2.5-3
# uname -a
Linux foobar.com 2.6.18-53.1.13.el5xen #1 SMP Mon Feb 11 13:56:26 EST 2008
i686 i686 i386 GNU/Linux
> I can only guess here -- but you might want to check out
> http://lists.linbit.com/pipermail/drbd-user/2007-November/007794.html for a
> thread that probably applies to your situation.
your guess was pretty good: as soon as I got rid of pygrub things started to
work as expected. Thank you.
so in the end I've got setup like:
## # Default
## bootloader = "/usr/bin/pygrub"
## disk = [ "phy:/dev/drbd1,xvda,w" ]
## # DRBD
disk = [ "drbd:test,xvda,w" ]
kernel = '/var/lib/xen/kernels/vmlinuz-2.6.18-53.el5xen'
ramdisk = '/var/lib/xen/kernels/initrd-2.6.18-53.el5xen.img'
root = '/dev/vmsystem/rootfs ro'
Maybe it's worth mentioning in user-guide that pygrub at this point
is "incompatible" with DRBD (as in: device definition "drbd:foo" is not
recognized).
--
Dmitry Makovey
Web Systems Administrator
Athabasca University
(780) 675-6245
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