Re: [ovirt-users] storage redundancy in Ovirt

What's SBA?

On Sun, Apr 16, 2017 at 4:05 AM Dan Yasny <dyasny(a)redhat.com&gt; wrote: > > > On Apr 16, 2017 7:01 AM, "Nir Soffer" <nsoffer(a)redhat.com&gt; wrote: > > On Sun, Apr 16, 2017 at 4:17 AM Dan Yasny <dyasny(a)gmail.com&gt; wrote: > >> When you set up a storage domain, you need to specify a host to perform >> the initial storage operations, but once the SD is defined, it's details >> are in the engine database, and all the hosts get connected to it directly. >> If the first host you used to define the SD goes down, all other hosts will >> still remain connected and work. SPM is an HA service, and if the current >> SPM host goes down, SPM gets started on another host in the DC. In short, >> unless your actual NFS exporting host goes down, there is no outage. >> > > There is no storage outage, but if you shutdown the spm host, the spm host > will not move to a new host until the spm host is online again, or you > confirm > manually that the spm host was rebooted. > > > In a properly configured setup the SBA should take care of that. That's > the whole point of HA services > > > Nir > > >> >> On Sat, Apr 15, 2017 at 1:53 PM, Konstantin Raskoshnyi < >> konrasko(a)gmail.com&gt; wrote: >> >>> Hi Fernando, >>> I see each host has direct connection nfs mount, but yes, if main host >>> to which I connected nfs storage going down the storage becomes unavailable >>> and all vms are down >>> >>> >>> On Sat, Apr 15, 2017 at 10:37 AM FERNANDO FREDIANI < >>> fernando.frediani(a)upx.com&gt; wrote: >>> >>>> Hello Konstantin. >>>> >>>> That doesn`t make much sense make a whole cluster depend on a single >>>> host. From what I know any host talk directly to NFS Storage Array or >>>> whatever other Shared Storage you have. >>>> Have you tested that host going down if that affects the other with >>>> the NFS mounted directlly in a NFS Storage array ? >>>> >>>> Fernando >>>> >>>> 2017-04-15 12:42 GMT-03:00 Konstantin Raskoshnyi <konrasko(a)gmail.com&gt;: >>>> >>>>> In ovirt you have to attach storage through specific host. >>>>> If host goes down storage is not available. >>>>> >>>>> On Sat, Apr 15, 2017 at 7:31 AM FERNANDO FREDIANI < >>>>> fernando.frediani(a)upx.com&gt; wrote: >>>>> >>>>>> Well, make it not go through host1 and dedicate a storage server for >>>>>> running NFS and make both hosts connect to it. >>>>>> In my view NFS is much easier to manage than any other type of >>>>>> storage, specially FC and iSCSI and performance is pretty much the same, so >>>>>> you won`t get better results other than management going to other type. >>>>>> >>>>>> Fernando >>>>>> >>>>>> 2017-04-15 5:25 GMT-03:00 Konstantin Raskoshnyi <konrasko(a)gmail.com&gt; >>>>>> : >>>>>> >>>>>>> Hi guys, >>>>>>> I have one nfs storage, >>>>>>> it's connected through host1. >>>>>>> host2 also has access to it, I can easily migrate vms between them. >>>>>>> >>>>>>> The question is - if host1 is down - all infrastructure is down, >>>>>>> since all traffic goes through host1, >>>>>>> is there any way in oVirt to use redundant storage? >>>>>>> >>>>>>> Only glusterfs? >>>>>>> >>>>>>> Thanks >>>>>>> >>>>>>> >>>>>>> _______________________________________________ >>>>>>> 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 >>> >>> >> _______________________________________________ >> 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 > > >