[ovirt-users] Re: RFE: HostedEngine to use boom by default

2019-06-12 Thread Strahil Nikolov 
Hi Simone,
yes - it will work inside the VM , but I can assure you that this will require 
no or little effort from dev side and will allow easier fixing of the VM in 
most cases.
Of course system snapshot is also nice, but this requires a lot of 
development.For hyperconverged systems - we got another nice feature - gluster 
snapshots which I also use.
If the approach in https://bugzilla.redhat.com/1670788

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1670788 – [RFE] Enable Storage Live Migration for Hosted Engine from wit...


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 is easy to implement - then BOOM won't be needed.

Best Regards,Strahil Nikolov


On Tue, Jun 11, 2019 at 11:44 PM Strahil Nikolov  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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-- 

Simone Tiraboschi

He / Him / His

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Red Hat

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[ovirt-users] Re: RFE: HostedEngine to use boom by default

2019-06-12 Thread Simone Tiraboschi 
On Tue, Jun 11, 2019 at 11:44 PM Strahil Nikolov 
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
> ___
> 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/5OTOIAI4BXMVRFN5MCDGXNZHYB46XWLF/
>


-- 

Simone Tiraboschi

He / Him / His

Principal Software Engineer

Red Hat 

stira...@redhat.com
@redhatjobs    redhatjobs
 @redhatjobs



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