[ovirt-users] storage issue's with oVirt 3.5.1 + Nexenta NFS

[InterNetX - Juergen Gotteswinter]

Hi,

how about Load, Latency, strange dmesg messages on the Nexenta ? You are
using bonded Gbit Networking? If yes, which mode?

Cheers,

Juergen

Am 20.04.2015 um 14:25 schrieb Maikel vd Mosselaar:
> Hi,
> 
> We are running ovirt 3.5.1 with 3 nodes and seperate engine.
> 
> All on CentOS 6.6:
> 3 x nodes
> 1 x engine
> 
> 1 x storage nexenta with NFS
> 
> For multiple weeks we are experiencing issues of our nodes that cannot
> access the storage at random moments (atleast thats what the nodes think).
> 
> When the nodes are complaining about a unavailable storage then the load
> rises up to +200 on all three nodes, this causes that all running VMs
> are unaccessible. During this process oVirt event viewer shows some i/o
> storage error messages, when this happens random VMs get paused and will
> not be resumed anymore (this almost happens every time but not all the
> VMs get paused).
> 
> During the event we tested the accessibility from the nodes to the
> storage and it looks like it is working normal, at least we can do a normal
> "ls" on the storage without any delay of showing the contents.
> 
> We tried multiple things that we thought it causes this issue but
> nothing worked so far.
> * rebooting storage / nodes / engine.
> * disabling offsite rsync backups.
> * moved the biggest VMs with highest load to different platform outside
> of oVirt.
> * checked the wsize and rsize on the nfs mounts, storage and nodes are
> correct according to the "NFS troubleshooting page" on ovirt.org.
> 
> The environment is running in production so we are not free to test
> everything.
> 
> I can provide log files if needed.
> 
> Kind Regards,
> 
> Maikel
> 
> 
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