[Users] (potential bug) After I create a virtual disk I am unable to start a VM - Permissions issue ? The node seems to have no write access to the directory on the NFS server...

[Morgan Cox]

Hi.

My setup is 3 servers

1. Frontend (engine).
2 Ovirt node
3. Nfs server (debian)

>From the Frontend (engine) :-

-bash-4.2$ ls -la
/tmp/test/2f7ee7bc-09b3-42ba-af91-40d79293e360/images/d1fcc1ae-dcf5-426e-a99f-3a48e84c5ae3/
total 2097168
drwxr-xr-x. 2 vdsm kvm       4096 Mar 28  2012 .
drwxr-xr-x. 3 vdsm kvm       4096 Mar 28  2012 ..
-rw-rw----. 1 vdsm kvm 2147483648 Mar 28  2012
9fe193c9-7139-4a6c-933a-c6f31d5e96bd
-rw-r--r--. 1 vdsm kvm        317 Mar 28  2012
9fe193c9-7139-4a6c-933a-c6f31d5e96bd.meta


I have (now) write access with vdsm user from here

>From the node (look at ownership....) :-


-bash-4.2$ ls -la
/rhev/data-center/b2b2e054-66b2-11e1-bda3-1728f784de9e/2f7ee7bc-09b3-42ba-af91-40d79293e360/images/d1fcc1ae-dcf5-426e-a99f-3a48e84c5ae3/
total 2097168
drwxr-xr-x. 2 4294967294 4294967294       4096 Mar 28 13:21 .
drwxr-xr-x. 3 4294967294 4294967294       4096 Mar 28 13:05 ..
-rw-rw----. 1 4294967294 4294967294 2147483648 Mar 28 13:05
9fe193c9-7139-4a6c-933a-c6f31d5e96bd
-rw-r--r--. 1 4294967294 4294967294        317 Mar 28 13:05
9fe193c9-7139-4a6c-933a-c6f31d5e96bd.meta

Also

>From the engine - mount command:-

10.0.0.190:/storage1/ on /tmp/test type nfs
(rw,relatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.0.0.190,mountvers=3,mountport=35065,mountproto=udp,local_lock=none,addr=10.0.0.190)

- note that the NFS share wasn't mounted until I mounted it...

>From the node - mount command

10.0.0.190:/storage1/ on /rhev/data-center/mnt/10.0.0.190:_storage1
type nfs4 (rw,relatime,vers=4,rsize=1048576,wsize=1048576,namlen=255,soft,nosharecache,proto=tcp,port=0,timeo=600,retrans=6,sec=sys,clientaddr=10.0.0.101,minorversion=0,local_lock=none,addr=10.0.0.190)

- looks like nfs4 on the node........

Any ideas anyone ?

Cheers






On 28 March 2012 06:45, Deepak C Shetty <deepakcs at linux.vnet.ibm.com> wrote:
> On 03/27/2012 04:08 PM, Morgan Cox wrote:
>
> Hi
>
> http://www.ovirt.org/wiki/Troubleshooting_NFS_Storage_Issues
>
> - This seems to refer to setup on a redhat based system
>
> The fies it refers to do not exist on Debian - i.e
>
> /etc/sysconfig/nfs and/etc/nfsmount.conf - they do not exist...
>
> Do you know the equivalent on Debian ?
>
>
> Sorry, i use fedora, and I dont know the equivalent of Debain.
> Maybe asking the big brain(google) might help. There should be an
> equivalent way of doing the same on debian.
>
> Also in my case v4 was not a issue, as much as the perms and uid:gid
> were, so look further to see perms and selinux booleans are
> set correctly in your setup.
>
>
> Regards
>
>
> On 27 March 2012 07:07, Deepak C Shetty <deepakcs at linux.vnet.ibm.com> wrote:
>>
>> On 03/26/2012 05:28 PM, Morgan Cox wrote:
>>
>> Hi.
>>
>> Still not actually managed to test a vm... I can start a VM (and use
>> spice) without a virtual disk.
>>
>> However as soon as I add a virtual disk the VM no longer starts
>>
>>
>> Go thru this and see if it helps...
>> http://www.ovirt.org/wiki/Troubleshooting_NFS_Storage_Issues
>>
>>
>> example error message
>>
>>
>> -------------------------------------------------------------------------------------------------------------------
>> VM ddf is down. Exit message internal error process exited while
>> connecting to monitor: qemu-kvm: -drive
>> file=/rhev/data-center/b2b2e054-66b2-11e1-bda3-1728f784de9e/2f7ee7bc-09b3-42ba-af91-40d79293e360/images/c507a2bc-38c5-498e-88c0-7cce8169cf67/6c36c8e4-6618-42f3-9cc4-06d2bccdc9cf,if=none,id=drive-virtio-disk0,format=raw,serial=c507a2bc-38c5-498e-88c0-7cce8169cf67,cache=none,werror=stop,rerror=stop,aio=threads:
>> could not open disk image
>> /rhev/data-center/b2b2e054-66b2-11e1-bda3-1728f784de9e/2f7ee7bc-09b3-42ba-af91-40d79293e360/images/c507a2bc-38c5-498e-88c0-7cce8169cf67/6c36c8e4-6618-42f3-9cc4-06d2bccdc9cf:
>> Permission denied .
>>
>> -------------------------------------------------------------------------------------------------------------------
>>
>> I have noticed that the
>> directory /rhev/data-center/b2b2e054-66b2-11e1-bda3-1728f784de9e/ is not
>> writable via the ovirt node server.
>>
>> I am using a separate NFS server for storage.
>>
>> Is this a bug ?
>>
>> Does anyone know how to fix this ?
>>
>> shall I report it ?
>>
>> Many regards !
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at ovirt.org
>> http://lists.ovirt.org/mailman/listinfo/users
>>
>>
>
>