On Tue, May 21, 2019 at 3:21 PM Miha Verlic <m...@krneki.org> wrote: > Hello, > > I have a few questions regarding migration of HostedEngine. Currently I > have a cluster of 3 oVirt 4.3.3 nodes, all three of them are capable of > running HE and I can freely migrate HostedEngine and regular VMs between > them. However I deployed HostedEngine storage on rather edgy NFS server > and I would like to migrate it to iSCSI based storage with multipathing. > Quite a few VMs are already running on cluster and are using iSCSI data > storage. > > Documentation is rather chaotic and fragmented, but from what I gathered > the path of migration is someting like: > > - place one host (#1), the "failover" host, into maintenance mode prior > to backup > - export configuration with engine-backup > - set global maintenance mode on all hosts >
Hi, fine till here, then - copy the backup file on the host you are going to use for the restore - run something like hosted-engine --deploy --restore-from-file=/root/engine-backup.tar.gz - when the tool will ask about HE storage domain, provide the details to create a new empty one - once done, connect to the engine, set host 2 into maintenance mode and reinstall it from the engine choosing to redeploy hosted-engine - do the same for host 3 - at the end the previous hosted-engine storage domain will be still visible (but renamed) in the engine; eventually migrate out other VM disks created there; once ready you can delete it > - install ovirt engine on that host (#1) (already installed, since this > is HE capable host) > - restore engine configuration using engine-backup > - run engine-setup with new parameters regarding storage > - after engine-setup, log into admin portal and remove old host (#1) > - redeploy hosts #2 and #3 > > Last two steps are a bit confusing as I'm not sure how removing old > failover host on which new HE is running would work. Also not > understanding the part where hosts 2 and 3 are described as > unrecoverable (but with running VMs, which I'd have to live migrate to > other hosts - how, if they're not operational?). > > Few other things: > > - Should I first remove & re-add host #1 without HE already deployed on > host? > > - Should I set global maintenance mode on all hosts before migration? > I'm guessing this is required if I want to prevent HE being started on > random host during transition... > > - Which host should be selected as SPM during the transition phase? > > - How can I configure iSCSI multipathing? Self-hosted engine > documentation mentions Multipath Helper tool, however I cannot find any > info about it. Is this tool freely available or only a part od RHEL > subscription? > > - Can I configure existing iSCSI Domain which already hosts some VMs as > HE storage? Or do I have to assign extra LUN/target exclusively for HE? > > Cheers > -- > Miha > _______________________________________________ > Users mailing list -- users@ovirt.org > To unsubscribe send an email to users-le...@ovirt.org > Privacy Statement: https://www.ovirt.org/site/privacy-policy/ > oVirt Code of Conduct: > https://www.ovirt.org/community/about/community-guidelines/ > List Archives: > https://lists.ovirt.org/archives/list/users@ovirt.org/message/R2HRFJE5UDRIA5RPEA3NO6UL6B2LAUZF/ > -- Simone Tiraboschi He / Him / His Principal Software Engineer Red Hat <https://www.redhat.com/> stira...@redhat.com @redhatjobs <https://twitter.com/redhatjobs> redhatjobs <https://www.facebook.com/redhatjobs> @redhatjobs <https://instagram.com/redhatjobs> <https://red.ht/sig> <https://redhat.com/summit>
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