On Wed, Feb 17, 2016 at 7:57 AM, Sahina Bose <sab...@redhat.com> wrote: > > > On 02/17/2016 05:08 AM, Bill James wrote: >> >> I have a ovirt cluster with and system running ovirt-engine 3.6.2.6-1 on >> centos7.2 >> and 3 hardware nodes running glusterfs 3.7.6-1 and centos7.2. >> I created a gluster volume using gluster cli and then went to add a >> storage domain. >> >> I created it with Path ovirt1-ks.test:/gv1 and all works fine, until >> ovirt1 goes down. >> Then ALL VMs pause till ovirt1 comes back up. >> Do I have to list all nodes in the path for this to work? >> >> Path: ovirt1-ks.test:/gv1 ovirt2-ks.test:/gv1 ovirt3-ks.test:/gv1 >> >> Or how do I prevent ovirt1 from being single point of failure? > > > Which type of storage domain have you created - NFS or GlusterFS? > With NFS, this could be a problem, as the nfs server running on ovirt1 can > become single point of failure. To work around this, you will need to set up > HA with CTDB or pacemaker/corosync depending on version of NFS you're using. > > If you're using glusterfs, did the hypervisor node go down as well when > ovirt1 went down? Only during mounting of the storage domain (either on > activate of hypervisor host/ reboot of host) is the server provided in path > required to access volume (ovirt1). You can provide > backup-volfile-servers=ovirt2-ks:ovirt3-ks in Mount options while creating > the storage domain.
oVirt is automatically detecting the available bricks and generating the backup-volfile-servers option when connecting to a gluster storage domain. You can see if this worked in vdsm.log, the backup-volfile-servers option should appear in the mount command. Please attach vdsm.log showing the time you connected to the gluster storage domain, and the time of the failure. Attach also /var/log/sanlock.log - this is the best place to detect issues accessing storage as it reads and writes to all storage domains frequently. > Please also provide output of gluster volume info. (I'm assuming the bricks > on the remaining servers were online) Nir _______________________________________________ Users mailing list Users@ovirt.org http://lists.ovirt.org/mailman/listinfo/users
