Open Stack

On Wed, Oct 31, 2012 at 1:29 PM, Bontala, Vibhuvardhan <
vibhuvardhan.bontala at emc.com> wrote:

> Hi,****
>
> ** **
>
> I am running GA bits of Folsom. I am running a two node setup where the
> first node is the controller+compute node that has Cinder running as well.
> The second node is merely a compute node. I am seeing an issue while
> booting an instance from Cinder volume on both the nodes. The “nova boot”
> operation fails while spawning the instance with the following error.****
>
> ** **
>
> [00mProcessExecutionError: Unexpected error while running command.****
>
> [00mCommand: sudo nova-rootwrap /etc/nova/rootwrap.conf iscsiadm -m node
> -T iqn.2010-10.org.openstack:volume-3ac4b027-905e-4318-a74e-2bdf94f5d887 -p
> 192.168.150.96:3260 --rescan****
>
> [00mExit code: 255****
>
> [00mStdout: ''****
>
> [00mStderr: 'iscsiadm: No portal found.\n'****
>
> [00m****
>
> ** **
>
> I had successfully created a Cinder volume with a valid image on it.****
>
> ** **
>
>
> +--------------------------------------+-----------+--------------+------+-------------+-------------+
> ****
>
> |                  ID                  |   Status  | Display Name | Size |
> Volume Type | Attached to |****
>
>
> +--------------------------------------+-----------+--------------+------+-------------+-------------+
> ****
>
> | 3ac4b027-905e-4318-a74e-2bdf94f5d887 | available |   Volume1    |  2
> |     None    |             |****
>
>
> +--------------------------------------+-----------+--------------+------+-------------+-------------+
> ****
>
> ** **
>
> I even tried to discover the iSCSI targets. But it returns with “no
> records found”.****
>
> ** **
>
> I then looked into to MySQL database for Cinder and looked at the entries,
> specifically “provider_location” and it looked just fine. 192.168.150.96
> is the node where I have controller and cinder running.****
>
> ** **
>
>
> +-----------------------------------------------------------------------------------------------+
> ****
>
> |
> provider_location
> |****
>
>
> +-----------------------------------------------------------------------------------------------+
> ****
>
> |
> NULL
> |****
>
> | 192.168.150.96:3260,1
> iqn.2010-10.org.openstack:volume-3ac4b027-905e-4318-a74e-2bdf94f5d887 1 |*
> ***
>
> ** **
>
> I manually tried to discover the iSCSI targets and it couldn’t find any.**
> **
>
> ** **
>
> stack at esg-dell-c4-s08:/etc/cinder$ sudo iscsiadm -m discovery -t
> sendtargets -p 192.168.150.96:3260 192.168.150.96:3260,1
> iqn.2010-10.org.openstack:volume-3ac4b027-905e-4318-a74e-2bdf94f5d887****
>
> iscsiadm: Connection to Discovery Address 192.168.150.96 closed****
>
> iscsiadm: Login I/O error, failed to receive a PDU****
>
> iscsiadm: retrying discovery login to 192.168.150.96****
>
> stack at esg-dell-c4-s08:/etc/cinder$ sudo iscsiadm -m node -T
> iqn.2010-10.org.openstack:volume-3ac4b027-905e-4318-a74e-2bdf94f5d887 -p
> 192.168.150.96:3260iscsiadm: no records found!****
>
> stack at esg-dell-c4-s08:/etc/cinder$ sudo iscsiadm -m node -T
> iqn.2010-10.org.openstack:volume-3ac4b027-905e-4318-a74e-2bdf94f5d887 -p
> 192.168.150.96:3260 --rescan****
>
> iscsiadm: No portal found.****
>
> stack at esg-dell-c4-s08:/etc/cinder$****
>
> ** **
>
> I am not sure what’s wrong with my setup. Any help is greatly appreciated.
> ****
>
> ** **
>
> Thanks****
>
> Vibhu****
>
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>
> Hi Vibnu,

Strange, you're unable to see the target on either of the nodes?  I'm
assuming your using the default LVM storage back-end.

Something to look at:

"sudo tgtadm --lld iscsi --op show --mode target" - Make sure your target
is present (on the cinder node)


You shouldn't *need* to do this, but to trouble-shoot you could also try:

"sudo iscsiadm -m discovery -p 192.168.150.96:3260 -t st"

followed by trying to login.

"sudo iscsiadm -m node
-T iqn.2010-10.org.openstack:volume-3ac4b027-905e-4318-a74e-2bdf94f5d887 -l"

John
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