[ovirt-users] Re: Upgrade scenario to 4.4 for HCI Gluster

On Tue, Apr 28, 2020 at 6:48 PM Sandro Bonazzola <sbonazzo(a)redhat.com&gt; wrote: > Adding +Lev Veyde <lveyde(a)redhat.com&gt; , +Steve Goodman > <sgoodman(a)redhat.com&gt; , +Evgeny Slutsky <eslutsky(a)redhat.com&gt; and +Gobinda > Das <godas(a)redhat.com&gt; for awareness > > Il giorno sab 18 apr 2020 alle ore 13:03 Gianluca Cecchi < > gianluca.cecchi(a)gmail.com&gt; ha scritto: > >> Hello, >> I saw from some mails in the list that the approach for upgrading from >> 4.3 to 4.4 will be similar to the 3.6 => 4.0 one. >> Reading the RHV 4.0 Self Hosted Engine Guide it seems it was necessary >> to have a second host, going through this: >> 5.4. Upgrading a RHEV-H-Based Self-Hosted Engine Environment >> >> https://access.redhat.com/documentation/en-us/red_hat_virtualization/4.0/... >> and also >> >> https://www.ovirt.org/develop/release-management/features/sla/hosted-engi... >> >> upgrade process involved: >> >> - set global ha maintenance >> - install a new host (and set it as on hosted engine one) >> - migrate engine VM to this host and set the host as the SPM >> - create a backup with engine-backup, verify its contents and copy to >> the host in some directory >> - run the upgrade utility on the host to update the engine VM >> hosted-engine --upgrade-appliance >> this will create a backup floating disk of the engine vm disk for >> rollback purposes and override the existing engine disk with a new one >> where to deploy the new engine version applying also the restore from the >> engine-backup >> --> what are requirements for 4.4 engine VM and so free storage to have >> on engine storage domain? >> The engine-setup will be automatically executed on the new version >> engine VM >> - exit from global maintenance >> - update remaining hosts >> >> Is the above procedure the correct one that I can test on a 4.3.9 lab? >> >> The 3.6 -> 4.0 flow implied that a 4.0 host could run a 3.6 engine VM >> Because the backup disk operation is done by the current running engine >> itself. >> So it should be true also for 4.3 -> 4.4 and a 4.4. host should be able >> to run a 4.3 engine, correct? >> >> In case of single 4.3.9 ovirt-node-ng host HCI with Gluster, can I apply >> the upgrade in a similar way? >> Something like: >> - create engine-backup and copy over to the host >> - put host into global maintenace >> - shutdown all VMS, engine included >> - enable 4.4. repo >> - install new image-base 4.4 >> is this correct and I can use 4.3 and 4.4 image base versions or do I >> have to sort-of-scratch necessarily? because 4.3 host is based on el7 while >> 4.4 on el8... but perhaps on mage based system I have flexibility..? >> what version of gluster will it be applied? Incompatibilities with the >> current 4.3.9 one (version 6.8-1.el7) >> - reboot host >> - exit global maintenance and wait for engine vm to come up correctly >> - enter global maintenance again >> - run the upgrade utility on the host >> >> Or do I need at least temporarily a new server to use as the 4.4. host, >> or what will be the expected path? >> >> Thanks, >> Gianluca >> >> > No, even if rough, indications? I see that the also the downstream beta docs set for RHV 4.4 doesn't contain an upgrade guide yet... Gianluca