[ovirt-users] Multiple Data Storage Domains

[Gary Pedretty]

I am having an issue in a Hosted Engine GlusterFS setup.   I have 4 hosts in a cluster, with the Engined being hosted on the Cluster.  This follows the pattern shown in the docs for a glusterized setup, except that I have 4 hosts.   I have engine, data, iso and export storage domains all as glusterfs on a replica 3 glusterfs on the first 3 hosts.  These gluster volumes are running on an SSD Hardware Raid 6, which is identical on all the hosts.  All the hosts have a second Raid 6 Array with Physical Hard Drives and I have created a second data storage domain as a glusterfs across all 4 hosts as a stripe 2 replica 2 and have added it to the Data Center.  However if I use this second Storage Domain as the boot disk for a VM, or as second disk for a VM that is already running, the VM will become non-responsive as soon as the VM starts using this disk.   Happens during the OS install if the VM is using this storage domain for its boot disk, or if I try copying anything large to it when it is a second disk for a VM that has its boot drive on the Master Data Storage Domain.  

If I mount the gluster volume that is this second storage domain on one of the hosts directly or any other machine on my local network, the gluster volume works fine.  It is only when it is used as a storage domain (second data domain) on VMs in the cluster.

Once the vm becomes non-responsive it cannot be stopped, removed or destroyed without restarting the host machine that the VM is currently running on.   The 4 hosts are connected via 10gig ethernet, so should not be a network issue.


Any ideas?

Gary

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Gary Pedretty                                        gary at ravnalaska.net <mailto:gary at eraalaska.net>
Systems Manager                                          www.flyravn.com <http://www.flyravn.com/>
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