[Xen-devel] Failed to create VM using configuration specified by Remus

[Minjia Zhang <zhangninja@xxxxxxxxx>]

I fail to use remus with xen-unstable (4.1)+ Linux-2.6.18.8:

[root@server1 img]# xm create rhel5.hvm 

Using config file "./rhel5.hvm".

Error: Device 768 (tap) could not be connected. server1:9000|aio:/dev/vgxen/hvmsnap does not exist

Am I missing something? Any hints will be appreciated.

According to Brendan's instruction on http://dsg.cs.ubc.ca/remus/doc.html

the config should like following:

disk = [ 'tap:remus:bkup:9000|aio:/dev/vmdisk/myguest,xvda1,w' ] 

According to my understanding，remus doesn't need the support of DRBD, cause it can continuously send memory state to backup server as well as write operation and network 

packages. So, what I do is to only ensure that /dev/vgxen/hvmsnap existing on both the primary and the backup and contain identical data.

My config file:

  1 import os, re

  2 arch = os.uname()[4]

  3 if re.search('64', arch):

  4     arch_libdir = 'lib64'

  5 else:

  6     arch_libdir = 'lib'

  7 kernel = '/usr/lib/xen/boot/hvmloader'

  8 builder = 'hvm'

  9 memory = '512'

 14 disk = [ 'tap:remus:server1:9000|aio:/dev/vgxen/hvmsnap,hda,w']

 16 vif = ['type=ioemu, mac=00:1c:3e:17:22:13']

 17 #boot = 'dc'

 18 boot = 'c'

 19 name = 'Rhel5-hvm1'

 20 acpi = 1

 21 apic = 1

 22 device_model = '/usr/' + arch_libdir + '/xen/bin/qemu-dm'

 23 vnc=1

 24 vncdisplay=2

 25 sdl=0

 26 opengl=1

 27 vnclisten="0.0.0.0"

 28 vncpasswd=''

 29 serial='pty'

"hvm.hvm" 29L, 975C                                                                                                                                            

Thanks for any help.

Best

--Minjia

-- 
-- 
Best Regards

Minjia Zhang

Huazhong University of Science and Technology

Room 328,Dong 8 Building 8, No.1037 Luoyu Road, Wuhan 430074, P.R.C.

Tel: +86-159-2625-3437

Email:zhangninja@xxxxxxxxx
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