How to create a backup in event of hardware failure of a single hosted engine?
Hello everyone, Currently we have a single bare metal that hosts oVirt and glusterFS which later on to be converted to a 3 nodes for HCI, currently another bare metal is coming this week and was planning to initially create it as a backup. is it possible to deploy a new hosted engine then create a gluster volume for 1st one as a backup domain then attach it to the new one if hardware failure occurred, or there is another kind of setup that can be done?
On Tue, Nov 17, 2020, 11:08 <ernestclydeachua@gmail.com> wrote:
Hello everyone, Currently we have a single bare metal that hosts oVirt and glusterFS which later on to be converted to a 3 nodes for HCI, currently another bare metal is coming this week and was planning to initially create it as a backup.
is it possible to deploy a new hosted engine then create a gluster volume for 1st one as a backup domain then attach it to the new one if hardware failure occurred, or there is another kind of setup that can be done?
I would add the new server as an additional host, first preparing the gluster volumes under the hood. In this way you achieve HA for engine and guest VMs. When third server arrives, repeat and have a proper 3 node replica self hosted engine setup.
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Hello Alex, How do i prepare the gluster volume as the gluster volume is also hosted on the 1st baremetal, can you elaborate this setup? just reading the docs of gluster must consists of 3 node either 3 gluster nodes or 2 gluster nodes + 1 arbiter on a replica set
What are you trying to achive ? Best Regards, Strahil Nikolov В сряда, 18 ноември 2020 г., 13:40:18 Гринуич+2, ernestclydeachua@gmail.com <ernestclydeachua@gmail.com> написа: Hello Alex, How do i prepare the gluster volume as the gluster volume is also hosted on the 1st baremetal, can you elaborate this setup? just reading the docs of gluster must consists of 3 node either 3 gluster nodes or 2 gluster nodes + 1 arbiter on a replica set _______________________________________________ Users mailing list -- users@ovirt.org To unsubscribe send an email to users-leave@ovirt.org Privacy Statement: https://www.ovirt.org/privacy-policy.html oVirt Code of Conduct: https://www.ovirt.org/community/about/community-guidelines/ List Archives: https://lists.ovirt.org/archives/list/users@ovirt.org/message/MV2H6DNLD5JAKI...
On Wed, Nov 18, 2020 at 1:40 PM <ernestclydeachua@gmail.com> wrote:
Hello Alex, How do i prepare the gluster volume as the gluster volume is also hosted on the 1st baremetal, can you elaborate this setup? just reading the docs of gluster must consists of 3 node either 3 gluster nodes or 2 gluster nodes + 1 arbiter on a replica set
Indeed, for production use, you need replica 3 gluster setup (either replica 3 or 2 + 1 arbiter). In your case, you may go temporarily with a replica 2 (two hosts) setup. In this case, it is best practise to dedicate a separate network for the gluster traffic. Lets assume gluster0 and gluster1 are the hostnames of each host at the gluster storage network and the bricks are at /gluster/engine/brick. Then you need to run from gluster0 host: gluster peer probe gluster1 gluster volume add-brick engine replica 2 gluster1:/gluster/engine/brick In that case though you need to adjust quorum: gluster volume set engine cluster.server-quorum-type none gluster volume set engine cluster.quorum-type fixed gluster volume set engine cluster.quorum-count 1 Repeat for each volume and wait for heal (sync to complete). Check heal status of each volume: gluster volume heal <volume name> info I do not include all details here. I assume the existing gluster volumes are already configured with the appropriate settings. As soon as you have the replica 2 setup in place, you then can proceed with a replica 3 setup with the same approach. Remember to enable quorum at each volume. Hope that helps.
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participants (3)
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Alex K -
ernestclydeachua＠gmail.com -
Strahil Nikolov