On Tue, Jun 11, 2019 at 11:44 PM Strahil Nikolov <hunter86_bg@yahoo.com> wrote:

Hello All,

I have seen a lot of cases where the HostedEngine gets corrupted/broken and beyond repair.

I think that BOOM is a good option for our HostedEngine appliances due to the fact that it supports booting from LVM snapshots and thus being able to easily recover after upgrades or other outstanding situations.

Sadly, BOOM has 1 drawback - that everything should be under a single snapshot - thus no separation of /var /log or /audit.

Do you think that changing the appliance layout is worth it ?

That idea is going to work at LVM level inside the VM, but at the end the hosted-engine VM is a VM so potentially taking a snapshot at VM level is a better option.

Currently this is not working because the hosted-engine VM disk is protected for split brains by a volume lease (VM leases weren't available when we started hosted-engine) and this inhibits snapshots and so live storage migration and so on.

We already have an open RFE to implement it for 4.4: https://bugzilla.redhat.com/1670788

Note: I might have an unsupported layout that could cause my confusion.Is your layout a single root LV ?

Best Regards,
Strahil Nikolov
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