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From Rakesh v <>
Subject Re: Upgrading OS on hypervisors
Date Fri, 14 Dec 2018 06:45:06 GMT
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 <> 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
> Bitworks LLC
> Cell RU: +7-923-414-1515
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