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Re: Upgrading OS on hypervisors

Hello Ivan

We upgrade only when critical security patch is released like meltdown and L1TF else we don't do upgrades for every single kernel release

Sent from my iPhone

> On 13-Dec-2018, at 11:05 PM, Ivan Kudryavtsev <kudryavtsev_ia@xxxxxxxxx> wrote:
> Rakesh,
> No magic exists. Migrate forth, reboot, and migrate back. What I'm really
> wondering about is why you upgrade every time, Ubuntu releases a new
> kernel... There are a pretty small amount of fixes related to KVM and hosts
> are located in the private networks, they are single-tenant. Maybe you just
> have to change to policy for that?
> чт, 13 дек. 2018 г. в 16:54, Rakesh v <>:
>> Hello Folks
>> I have a question regarding upgrading OS on hypervisor. We have few
>> platforms with around 200 hypervisors in each platforms. Every time a new
>> Ubuntu kernel comes in with new security patch like L1TF fix or other , we
>> need to upgrade kernel on all hypervisors. Before rebooting hypervisor we
>> enable maintenance on it so that all vm's are migrated away. During this
>> maintenance we always see some Network interruptions because of live
>> migrations.
>> How are you guys handling such situations and how are doing the OS
>> upgrades? If you have some suggestions or using some automation tools then
>> please let know
>> I want to reduce time taken to upgrade all hypervisors without any impact
>> to Networks or VM's
>> Sent from my iPhone
> -- 
> With best regards, Ivan Kudryavtsev
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