Re: [ovirt-users] Ovirt/Gluster

On 08/19/2015 09:04 AM, Ravishankar N wrote: > > > On 08/18/2015 04:22 PM, Ramesh Nachimuthu wrote: >> + Ravi from gluster. >> >> Regards, >> Ramesh >> >> ----- Original Message ----- >> From: "Sander Hoentjen" <sander(a)hoentjen.eu&gt; >> To: users(a)ovirt.org >> Sent: Tuesday, August 18, 2015 3:30:35 PM >> Subject: [ovirt-users] Ovirt/Gluster >> >> Hi, >> >> We are looking for some easy to manage self contained VM hosting. Ovirt >> with GlusterFS seems to fit that bill perfectly. I installed it and >> then >> starting kicking the tires. First results looked promising, but now I >> can get a VM to pause indefinitely fairly easy: >> >> My setup is 3 hosts that are in a Virt and Gluster cluster. Gluster is >> setup as replica-3. The gluster export is used as the storage domain >> for >> the VM's. > > Hi, > > What version of gluster and ovirt are you using? glusterfs-3.7.3-1.el7.x86_64 vdsm-4.16.20-0.el7.centos.x86_64 ovirt-engine-3.5.3.1-1.el7.centos.noarch > >> >> Now when I start the VM all is good, performance is good enough so we >> are happy. I then start bonnie++ to generate some load. I have a VM >> running on host 1, host 2 is SPM and all 3 VM's are seeing some network >> traffic courtesy of gluster. >> >> Now, for fun, suddenly the network on host3 goes bad (iptables -I >> OUTPUT >> -m statistic --mode random --probability 0.75 -j REJECT). >> Some time later I see the guest has a small "hickup", I'm guessing that >> is when gluster decides host 3 is not allowed to play anymore. No big >> deal anyway. >> After a while 25% of packages just isn't good enough for Ovirt anymore, >> so the host will be fenced. > > I'm not sure what fencing means w.r.t ovirt and what it actually > fences. As far is gluster is concerned, since only one node is > blocked, the VM image should still be accessible by the VM running on > host1. Fencing means (at least in this case) that the IPMI of the server does a power reset. >> After a reboot *sometimes* the VM will be >> paused, and even after the gluster self-heal is complete it can not be >> unpaused, has to be restarted. > > Could you provide the gluster mount (fuse?) logs and the brick logs > of all 3 nodes when the VM is paused? That should give us some clue. > Logs are attached. Problem was at around 8:15 - 8:20 UTC This time however the vm stopped even without a reboot of hyp03

> Regards, > Ravi >> >> Is there anything I can do to prevent the VM from being paused? >> >> Regards, >> Sander >> >> _______________________________________________ >> Users mailing list >> Users(a)ovirt.org >> http://lists.ovirt.org/mailman/listinfo/users >