[libvirt-users] [libvirt] Libvirtd running as root tries to access oneadmin (OpenNebula) NFS mount but throws: error: can’t canonicalize path

[TomK]

Hey All,

Wondering if anyone had any suggestions on this topic?

Cheers,
Tom K.
------------------------------------------------------------------------------------- 

Living on earth is expensive, but it includes a free trip around the sun.

On 4/9/2016 11:08 AM, TomK wrote:
> Adding in libvir-list.
>
> Cheers,
> Tom K.
> ------------------------------------------------------------------------------------- 
>
> Living on earth is expensive, but it includes a free trip around the sun.
>
> On 4/7/2016 7:32 PM, TomK wrote:
>> Hey All,
>>
>> I've an issue where libvirtd tries to access an NFS mount but errors 
>> out with: can't canonicalize path '/var/lib/one//datastores/0 .  The 
>> unprevilidged user is able to read/write fine to the share. 
>> root_squash is used and for security reasons no_root_squash cannot be 
>> used.
>>
>> On the controller and node SELinux is disabled.
>>
>> [oneadmin at mdskvm-p01 ~]$ virsh -d 1 --connect qemu:///system create 
>> /var/lib/one//datastores/0/38/deployment.0
>> create: file(optdata): /var/lib/one//datastores/0/38/deployment.0
>> error: Failed to create domain from 
>> /var/lib/one//datastores/0/38/deployment.0
>> error: can't canonicalize path 
>> '/var/lib/one//datastores/0/38/disk.1': Permission denied
>>
>> I added some debug flags to get more info and added -x to the deploy 
>> script. Closest I get to more details is this:
>>
>> 2016-04-06 04:15:35.945+0000: 14072: debug : 
>> virStorageFileBackendFileInit:1441 : initializing FS storage file 
>> 0x7f6aa4009000 (file:/var/lib/one//datastores/0/38/disk.1)[9869:9869]
>> 2016-04-06 04:15:35.954+0000: 14072: error : 
>> virStorageFileBackendFileGetUniqueIdentifier:1523 : can't 
>> canonicalize path '/var/lib/one//datastores/0/38/disk.1':
>>
>> https://www.redhat.com/archives/libvir-list/2014-May/msg00194.html
>>
>> Comment is: "The current implementation works for local
>> storage only and returns the canonical path of the volume."
>>
>> But it seems the logic is applied to NFS mounts. Perhaps it shouldn't 
>> be?  Anyway to get around this problem?  This is CentOS 7 .
>>
>> Cheers,
>> Tom K.
>> ------------------------------------------------------------------------------------- 
>>
>> Living on earth is expensive, but it includes a free trip around the 
>> sun.
>>
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>
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