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From Ivan Kudryavtsev <kudryavtsev...@bw-sw.com>
Subject Re: Need to ask for help again (Migration in cloudstack)
Date Mon, 02 Oct 2017 10:50:17 GMT
AFAIK ACS has VM suspend parameter in KVM agent which acts when ACS is
unable to migrate successfully. Also, I almost have no problem with
8core/16GB migration over 10G, but you are right. Sometimes it doesn't work
as expected without autoconvergence and new Qemu/KVM does the work.

2017-10-02 17:44 GMT+07:00 Andrija Panic <andrija.panic@gmail.com>:

> A bit late, and not directly related with original question - if you are
> doing any kind of KVM live migration (ACS or not), make sure you are using
> qemu 2.5 and libvirt 1.3+, to support
> dynamic auto-convergence (regular auto-convergence, almost useless,
> available from qemu 1.6+) - becase live migration works well, until you hit
> busy production VM, where there is hi RAM change rate, then nothing helps
> except mentioned qemu 2.5+ dynamic autoconvergence (and even this takes
> ages to completely allow some very busy VMs to finish migration...).
>
> On 5 September 2017 at 22:52, ilya <ilya.mailing.lists@gmail.com> wrote:
>
> > Personal experience with KVM (not cloudstack related) and non-shared
> > storage migration - works most of the time - but can be very slow - even
> > with 10G backplane.
> >
> > On 9/5/17 6:27 AM, Marc-Aurèle Brothier wrote:
> > > Hi Dimitriy,
> > >
> > > I wrote the PR for the live migration in cloudstack (PR 1709). We're
> > using
> > > an older version than upstream so it's hard for me to fix the
> integration
> > > tests errors. All I can tell you, is that you should first configure
> > > libvirt correctly for migration. You can play with it by manually
> running
> > > virsh commands to initiate the migration. The networking part will not
> > work
> > > after the VM being on the other machine if down manually.
> > >
> > > Marc-Aurèle
> > >
> > > On Tue, Sep 5, 2017 at 2:07 PM, Dmitriy Kaluzhniy <
> > > dmitriy.kaluzhniy@gmail.com> wrote:
> > >
> > >> Hello,
> > >> That's what I want, thank you!
> > >> I want to have Live migration on KVM with non-shared storages.
> > >> As I understood, migration is performed by LibVirt.
> > >>
> > >> 2017-09-01 17:04 GMT+03:00 Simon Weller <sweller@ena.com.invalid>:
> > >>
> > >>> Dmitriy,
> > >>>
> > >>> Can you give us a bit more information about what you're trying to
> do?
> > >>> If you're looking for live migration on non shared storage with KVM,
> > >> there
> > >>> is an outstanding PR  in the works to support that:
> > >>>
> > >>> https://github.com/apache/cloudstack/pull/1709
> > >>>
> > >>> - Si
> > >>>
> > >>>
> > >>> ________________________________
> > >>> From: Rajani Karuturi <rajani@apache.org>
> > >>> Sent: Friday, September 1, 2017 4:07 AM
> > >>> To: dev@cloudstack.apache.org
> > >>> Subject: Re: Need to ask for help again (Migration in cloudstack)
> > >>>
> > >>> You might start with this commit
> > >>> https://github.com/apache/cloudstack/commit/
> > >> 21ce3befc8ea9e1a6de449a21499a5
> > >>> 0ff141a183
> > >>>
> > >>>
> > >>> and storage_motion_supported column in hypervisor_capabilities
> > >>> table.
> > >>>
> > >>> Thanks,
> > >>>
> > >>> ~ Rajani
> > >>>
> > >>> http://cloudplatform.accelerite.com/
> > >>>
> > >>> On August 31, 2017 at 6:29 PM, Dmitriy Kaluzhniy
> > >>> (dmitriy.kaluzhniy@gmail.com) wrote:
> > >>>
> > >>> Hello!
> > >>> I contacted this mail before, but I wasn't subscribed to mailing
> > >>> list.
> > >>> The reason I'm contacting you - I need advise.
> > >>> During last week I was learning cloudstack code to find where is
> > >>> implemented logic of this statements I found in cloudstack
> > >>> documentation:
> > >>> "(KVM) The VM must not be using local disk storage. (On
> > >>> XenServer and
> > >>> VMware, VM live migration with local disk is enabled by
> > >>> CloudStack support
> > >>> for XenMotion and vMotion.)
> > >>>
> > >>> (KVM) The destination host must be in the same cluster as the
> > >>> original
> > >>> host. (On XenServer and VMware, VM live migration from one
> > >>> cluster to
> > >>> another is enabled by CloudStack support for XenMotion and
> > >>> vMotion.)"
> > >>>
> > >>> I made up a long road through source code but still can't see
> > >>> it. If you
> > >>> can give me any advise - it will be amazing.
> > >>> Anyway, thank you.
> > >>>
> > >>> --
> > >>>
> > >>> *Best regards,Dmitriy Kaluzhniy+38 (073) 101 14 73*
> > >>>
> > >>
> > >>
> > >>
> > >> --
> > >>
> > >>
> > >>
> > >> *--С уважением,Дмитрий Калюжный+38 (073) 101 14
73*
> > >>
> > >
> >
>
>
>
> --
>
> Andrija Panić
>



-- 
With best regards, Ivan Kudryavtsev
Bitworks Software, Ltd.
Cell: +7-923-414-1515
WWW: http://bitworks.software/ <http://bw-sw.com/>

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