[one-users] Errors, problems when "creating VM using OpenNebula 3.6.0 in Ubuntu 12.04 with iSCSI datastore"

Wed Dec 11 14:10:40 PST 2013

Dear Jaime (and the OpenNebula Community members),

Thanks for your reply.

I will upgrade to OpenNebula 3.8.1/5 to see how it will go.

1) when run "oneimage show 0", it should have below output:

......

SOURCE: iqn.2013-12.iSCSIHost:192.168.1.7.vg-one.lv-one-13
PATH: /var/lib/images/win-xp.qcow2

......

but it have below output:

......

"SOURCE: /var/lib/images/win-xp.qcow2".

......

For the above result, the image template file winxp.img is defined as below:

NAME = "Winxp-iscsi"
SOURCE = /var/lib/images/win-xp.qcow2
TYPE = OS
PUBLIC = YES

Image creation command is "oneimage create winxp.img -d 100". 100 is the ID
of in iSCSI Datastore.

2) In the winxp.img, change the SOURCE to PATH, create the image again,
then when run "oneimage show 0", the result is different, as shown below:

......

SOURCE:
PATH: /var/lib/images/win-xp.qcow2

......

The error message is "Error copying image in the datastore: Error
registering 192.168.1.1:/dev/vg-one/lv-one-3"

This show it is still incorrect.

3) Will upgrade the OpenNebula to see the difference. It is much
appreciated if you can email me the correct information on how to "Create a
winxp VM using OpenNebula 3.x.x in Ubuntu 12.04 with iSCSI datastore".

Thanks kindly,
Q.S.

On Thu, Dec 12, 2013 at 6:43 AM, Jaime Melis <jmelis at c12g.com> wrote:

> Hi,
>
> OpenNebula 4.4 which has been just released has deprectated iSCSI. The
> main reason is that the tgt iSCSI daemon is not very flexible and we
> recommend using other storage mechanisms instead.
>
> OpenNebula 3.6.0 should be definitetly upgraded to newer versions.
>
> Regarding your specific problem, can you please detail what command and
> image file did you use to create the image?
>
> cheers,
> Jaime
>
>
> On Wed, Dec 4, 2013 at 7:25 AM, Qiubo Su (David Su) <qiubosu at gmail.com>wrote:
>
>> Dear OpenNebula Community,
>>
>> 1) To create VM using OpenNebula 3.6.0 in Ubuntu 12.04 with iSCSI
>> datastore, I create Front-end, NodeServer and iSCSIHost (an iSCSI target VM
>> created within the NodeServer. The IP of iSCSIHost is 192.168.1.7).
>>
>> The required setup, configuration for Front-end, NodeServer and iSCSIHost
>> looks fine.
>>
>> The host, image, vnet and datastore creation under NodeServer are ok
>> (except of the VM creation in below 2) ), but when "oneimage show 0", can't
>> see output of
>>
>> "SOURCE: iqn.2013-12.iSCSIHost:192.168.1.7.vg-one.lv-one-13
>> PATH: /var/lib/images/win-xp.qcow2"
>>
>> while only can see "SOURCE: /var/lib/images/win-xp.qcow2".
>>
>> the opennebula 3.6.0 used was downloaded in more than one year ago. is it
>> the correct version of opennebula to use?
>>
>> 2) the VM creation is failed and got "error executing image transfer
>> script: error cloning NodeServer:/dev//var/lib/image/win-xp-2/qcow2-0".
>> Below is the vm.log for this VM creation:
>>
>> Wed Dec  4 17:38:56 2013 [DiM][I]: New VM state is ACTIVE.
>> Wed Dec  4 17:38:56 2013 [LCM][I]: New VM state is PROLOG.
>> Wed Dec  4 17:38:56 2013 [TM][I]: Command execution fail:
>> /var/lib/one/var/remotes/tm/iscsi/clone
>> Front-end:/var/lib/image/win-xp-2.qcow2
>> NodeServer:/var/lib/one/var//datastores/0/0/disk.0 0 101
>> Wed Dec  4 17:38:56 2013 [TM][E]: clone: Command "    set -e
>> Wed Dec  4 17:38:56 2013 [TM][I]:
>> Wed Dec  4 17:38:56 2013 [TM][I]: # get size
>> Wed Dec  4 17:38:56 2013 [TM][I]: SIZE=$(sudo lvs --noheadings -o lv_size
>> "/dev//var/lib/image/win-xp-2/qcow2")
>> Wed Dec  4 17:38:56 2013 [TM][I]:
>> Wed Dec  4 17:38:56 2013 [TM][I]: # create lv
>> Wed Dec  4 17:38:56 2013 [TM][I]: sudo lvcreate -L${SIZE}
>> /var/lib/image/win-xp-2 -n qcow2-0
>> Wed Dec  4 17:38:56 2013 [TM][I]:
>> Wed Dec  4 17:38:56 2013 [TM][I]: # clone lv with dd
>> Wed Dec  4 17:38:56 2013 [TM][I]: sudo dd
>> if=/dev//var/lib/image/win-xp-2/qcow2
>> of=/dev//var/lib/image/win-xp-2/qcow2-0 bs=64k
>> Wed Dec  4 17:38:56 2013 [TM][I]:
>> Wed Dec  4 17:38:56 2013 [TM][I]: # new iscsi target
>> Wed Dec  4 17:38:56 2013 [TM][I]: TID=$(sudo tgtadm --lld iscsi --op show
>> --mode target |             grep "Target" | tail -n 1 |             awk
>> '{split($2,tmp,":"); print tmp[1]+1;}')
>> Wed Dec  4 17:38:56 2013 [TM][I]:
>> Wed Dec  4 17:38:56 2013 [TM][I]: sudo tgtadm --lld iscsi --op new --mode
>> target --tid $TID  --targetname Front-end:/var/lib/image/win-xp-2.qcow2-0
>> Wed Dec  4 17:38:56 2013 [TM][I]: sudo tgtadm --lld iscsi --op bind
>> --mode target --tid $TID -I ALL
>> Wed Dec  4 17:38:56 2013 [TM][I]: sudo tgtadm --lld iscsi --op new --mode
>> logicalunit --tid $TID  --lun 1 --backing-store
>> /dev//var/lib/image/win-xp-2/qcow2-0
>> Wed Dec  4 17:38:56 2013 [TM][I]: sudo tgt-admin --dump |sudo tee
>> /etc/tgt/targets.conf >& /dev/null" failed: ssh: Could not resolve hostname
>> /var/lib/image/win-xp-2.qcow2: Name or service not known
>> Wed Dec  4 17:38:56 2013 [TM][E]: Error cloning
>> NodeServer:/dev//var/lib/image/win-xp-2/qcow2-0
>> Wed Dec  4 17:38:56 2013 [TM][I]: ExitCode: 255
>> Wed Dec  4 17:38:56 2013 [TM][E]: Error executing image transfer script:
>> Error cloning NodeServer:/dev//var/lib/image/win-xp-2/qcow2-0
>> Wed Dec  4 17:38:56 2013 [DiM][I]: New VM state is FAILED
>>
>> 3) the iSCSI INITIATOR is only installed in the NodeServer. the tgt (for
>> tgt admin) is only installed in the iSCSIHost, so the /etc/tgt/targets.conf
>> is only in the iSCSIHost.
>>
>> From the result, it doesn't look like the Front-end and NodeServer can
>> well communicate with the iSCSIHost, can access the iSCSI storage partition
>> created under the iSCSIHost target.
>>
>> It is much appreciated if anyone can help with the above.
>>
>> Thanks kindly,
>> Q.S.
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.opennebula.org
>> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>>
>>
>
>
> --
> Jaime Melis
> C12G Labs - Flexible Enterprise Cloud Made Simple
> http://www.c12g.com | jmelis at c12g.com
>
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