[Xen-devel] Remus disk replication failed

[agya naila <agya.naila@xxxxxxxxx>]

Dear all,

I am configure my machine to run the remus disk replication. I am using xen 4.2.3 installed from sources and Ubuntu 12.04 64 bit both for Dom0 and DomU. 

I have install the blktap and its work properly with configuration string phy or tap2 like this :

disk = ['phy:/dev/vggroup/DomU,xvda,w']

or

disk = ['tap2:tapdisk:aio:/dev/vggroup/DomU,xvda,w']

and remus command 

remus --no-net myvm mybackuphost

However when I change the string as suggested on remus pages to enable the disk replication its still failed :

name = "DomU"

memory = 1024

disk = ['tap2:remus:10.10.10.3:8002|aio:/dev/vggroup/DomU,xvda,w']  

vif = ['ip=192.168.1.55,bridge=xenbr0']

bootloader = "pygrub"

with error messages :

name1@machine1:~$ sudo xm create -c /etc/xen/DomU.cfg

Using config file "/etc/xen/DomU.cfg".

Error: ('create', '-aremus:10.10.10.3:8002|aio:/dev/vggroup/DomU') failed (512  )

and on the log file :

name1@machine1:~$ sudo sudo tail /var/log/xen/xend.log

    mounted_vbd_uuid = dom0.create_vbd(vbd, disk);

  File "/usr/local/lib/python2.7/dist-packages/xen/xend/XendDomainInfo.py", line 3987, in create_vbd

    devid = dev_control.createDevice(config)

  File "/usr/local/lib/python2.7/dist-packages/xen/xend/server/BlktapController.py", line 174, in createDevice

    device = TapdiskController.create(params, file)

  File "/usr/local/lib/python2.7/dist-packages/xen/xend/server/BlktapController.py", line 286, in create

    return TapdiskController.exc('create', '-a%s:%s' % (dtype, image))

  File "/usr/local/lib/python2.7/dist-packages/xen/xend/server/BlktapController.py", line 233, in exc

    (args, rc, out, err))

TapdiskException: ('create', '-aremus:10.10.10.3:8002|aio:/dev/vggroup/DomU') failed (512  )

Any hints and help would very appreciated.

Regards,

Agya

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