Re: [ovirt-users] hyperconverged question

Typo..."Set it up and then failed that **HOST**" And upon that host going down, the storage domain went down. I only have hosted storage domain and this new one - is this why the DC went down and no SPM could be elected? I dont recall this working this way in early 4.0 or 3.6 On Thu, Aug 31, 2017 at 3:30 PM, Charles Kozler <ckozleriii(a)gmail.com&gt; wrote: > So I've tested this today and I failed a node. Specifically, I setup a > glusterfs domain and selected "host to use: node1". Set it up and then > failed that VM > > However, this did not work and the datacenter went down. My engine stayed > up, however, it seems configuring a domain to pin to a host to use will > obviously cause it to fail > > This seems counter-intuitive to the point of glusterfs or any redundant > storage. If a single host has to be tied to its function, this introduces a > single point of failure > > Am I missing something obvious? > > On Thu, Aug 31, 2017 at 9:43 AM, Kasturi Narra <knarra(a)redhat.com&gt; wrote: > >> yes, right. What you can do is edit the hosted-engine.conf file and >> there is a parameter as shown below [1] and replace h2 and h3 with your >> second and third storage servers. Then you will need to restart >> ovirt-ha-agent and ovirt-ha-broker services in all the nodes . >> >> [1] 'mnt_options=backup-volfile-servers=<h2>:<h3>' >> >> On Thu, Aug 31, 2017 at 5:54 PM, Charles Kozler <ckozleriii(a)gmail.com&gt; >> wrote: >> >>> Hi Kasturi - >>> >>> Thanks for feedback >>> >>> > If cockpit+gdeploy plugin would be have been used then that would >>> have automatically detected glusterfs replica 3 volume created during >>> Hosted Engine deployment and this question would not have been asked >>> >>> Actually, doing hosted-engine --deploy it too also auto detects >>> glusterfs. I know glusterfs fuse client has the ability to failover >>> between all nodes in cluster, but I am still curious given the fact that I >>> see in ovirt config node1:/engine (being node1 I set it to in hosted-engine >>> --deploy). So my concern was to ensure and find out exactly how engine >>> works when one node goes away and the fuse client moves over to the other >>> node in the gluster cluster >>> >>> But you did somewhat answer my question, the answer seems to be no (as >>> default) and I will have to use hosted-engine.conf and change the parameter >>> as you list >>> >>> So I need to do something manual to create HA for engine on gluster? >>> Yes? >>> >>> Thanks so much! >>> >>> On Thu, Aug 31, 2017 at 3:03 AM, Kasturi Narra <knarra(a)redhat.com&gt; >>> wrote: >>> >>>> Hi, >>>> >>>> During Hosted Engine setup question about glusterfs volume is being >>>> asked because you have setup the volumes yourself. If cockpit+gdeploy >>>> plugin would be have been used then that would have automatically detected >>>> glusterfs replica 3 volume created during Hosted Engine deployment and this >>>> question would not have been asked. >>>> >>>> During new storage domain creation when glusterfs is selected there >>>> is a feature called 'use managed gluster volumes' and upon checking this >>>> all glusterfs volumes managed will be listed and you could choose the >>>> volume of your choice from the dropdown list. >>>> >>>> There is a conf file called /etc/hosted-engine/hosted-engine.conf >>>> where there is a parameter called backup-volfile-servers="h1:h2" and if one >>>> of the gluster node goes down engine uses this parameter to provide ha / >>>> failover. >>>> >>>> Hope this helps !! >>>> >>>> Thanks >>>> kasturi >>>> >>>> >>>> >>>> On Wed, Aug 30, 2017 at 8:09 PM, Charles Kozler <ckozleriii(a)gmail.com&gt; >>>> wrote: >>>> >>>>> Hello - >>>>> >>>>> I have successfully created a hyperconverged hosted engine setup >>>>> consisting of 3 nodes - 2 for VM's and the third purely for storage. I >>>>> manually configured it all, did not use ovirt node or anything. Built the >>>>> gluster volumes myself >>>>> >>>>> However, I noticed that when setting up the hosted engine and even >>>>> when adding a new storage domain with glusterfs type, it still asks for >>>>> hostname:/volumename >>>>> >>>>> This leads me to believe that if that one node goes down (ex: >>>>> node1:/data), then ovirt engine wont be able to communicate with that >>>>> volume because its trying to reach it on node 1 and thus, go down >>>>> >>>>> I know glusterfs fuse client can connect to all nodes to provide >>>>> failover/ha but how does the engine handle this? >>>>> >>>>> _______________________________________________ >>>>> Users mailing list >>>>> Users(a)ovirt.org >>>>> http://lists.ovirt.org/mailman/listinfo/users >>>>> >>>>> >>>> >>> >> > _______________________________________________ Users mailing list Users(a)ovirt.org http://lists.ovirt.org/mailman/listinfo/users