Andrija, AFAIK you can't snapshot all the volumes in the exact same moment, but I am not sure if it really needed in your case. VM snapshot it's what you would need, only supported for Xenserver and VMware; we need to push for VM snapshot for KVM as well, I know it's possible as I have done it manually with "virsh".
There are different ways around a problem though, if you are running mysql with innodb for example you could just do a mysqldump (with --single-transaction to avoid locking the tables). HTH Lucian -- Sent from the Delta quadrant using Borg technology! Nux! www.nux.ro ----- Original Message ----- > From: "Andrija Panic" <andrija.pa...@gmail.com> > To: users@cloudstack.apache.org > Sent: Friday, 31 October, 2014 15:10:26 > Subject: Re: XenServer > Nux, > > I understand this - but a question for you - you have i.e. 3 volumes > attached to a VM - how do you snapshot those and make sure they are > snapshoted in the EXACT same moment, to preserve data integrity of the data > inside VM - you have i.e. database files on 1 volume, database logs on > another. > > This is a reall question, not kidding ? What I know, you can turnoff VM, > and then snapshot one by one - but this is not the goal of the > snapshotting... > ? > > Thanks > > > > On 31 October 2014 16:06, Nux! <n...@li.nux.ro> wrote: > >> Andrija, >> >> You can still do volume snapshotting with KVM, works fine. >> >> http://www.nux.ro/archive/2014/01/Taking_KVM_volume_snapshots_with_Cloudstack_4_2_on_CentOS_6_5.html >> >> All we need is a way to quickly restore the volume, some guys at leaseweb >> were working on something like this, hope to see this feature in future >> versions. >> >> -- >> Sent from the Delta quadrant using Borg technology! >> >> Nux! >> www.nux.ro >> >> ----- Original Message ----- >> > From: "Andrija Panic" <andrija.pa...@gmail.com> >> > To: users@cloudstack.apache.org >> > Sent: Friday, 31 October, 2014 09:37:49 >> > Subject: Re: XenServer >> >> > My vote also for KVM snapshooting - having all the nice fetaures, but >> > without basic virtualization stuff like snapshotting - it simply drives >> me >> > and our client nuts... >> > >> > On 31 October 2014 10:03, Andrei Mikhailovsky <and...@arhont.com> wrote: >> > >> >> Is there a feature request for this support or should we open one? I >> would >> >> like to see this implemented for KVM. >> >> >> >> Andrei >> >> ----- Original Message ----- >> >> >> >> > From: "Nux!" <n...@li.nux.ro> >> >> > To: users@cloudstack.apache.org >> >> > Sent: Thursday, 30 October, 2014 11:25:10 PM >> >> > Subject: Re: XenServer >> >> >> >> > Andrei, I am hopeful the next incarnation of XenServer will be much >> >> > better/modern, with support for CEPH, GlusterFS etc. >> >> >> >> > Re KVM snapshotting, KVM can do live snapshots of the volumes+memory >> >> > (you can do it with "virsh"), but ACS doesn't support it; forgot >> >> > why. >> >> >> >> > Lucian >> >> >> >> > -- >> >> > Sent from the Delta quadrant using Borg technology! >> >> >> >> > Nux! >> >> > www.nux.ro >> >> >> >> > ----- Original Message ----- >> >> > > From: "Andrei Mikhailovsky" <and...@arhont.com> >> >> > > To: users@cloudstack.apache.org >> >> > > Sent: Thursday, 30 October, 2014 21:24:06 >> >> > > Subject: Re: XenServer >> >> >> >> > > I would happily switch to XenServer once they will have ceph >> >> > > support. I do >> >> > > prefer XenServer and the feature list of ACS + XenServer is a bit >> >> > > better. >> >> > > >> >> > > It sucks not having proper snapshotting in KVM where one can create >> >> > > the whole vm >> >> > > snapshot (volumes + memory) very quickly without the need to bother >> >> > > snapshotting every volume and wait for ages. >> >> > > >> >> > > Andrei >> >> > > ----- Original Message ----- >> >> > > >> >> > >> From: "motty cruz" <motty.c...@gmail.com> >> >> > >> To: users@cloudstack.apache.org >> >> > >> Sent: Thursday, 30 October, 2014 8:43:32 PM >> >> > >> Subject: Re: XenServer >> >> > > >> >> > >> I am no expert by any means but my personal opinion, I really like >> >> > >> XenServer a lot better. I have a cluster of about 5 machines >> >> > >> running >> >> > >> KVM, >> >> > >> ACS 4.3. I unable to do snapshot, migrating VMs from one host to >> >> > >> another >> >> > >> takes a long time. I had a very bad experience with "Balloon >> >> > >> driver", >> >> > >> I am >> >> > >> traumatize using KVM. >> >> > > >> >> > >> XenServer don't need to install cloudstack agent is already >> >> > >> integrated. I >> >> > >> am very happy with XenServer. I still need to work out a few >> >> > >> lingering >> >> > >> issues but thus far am a happy person. >> >> > > >> >> > >> Thanks, >> >> > >> -Motty >> >> > > >> >> > >> On Thu, Oct 30, 2014 at 1:15 PM, Andrei Mikhailovsky >> >> > >> <and...@arhont.com> >> >> > >> wrote: >> >> > > >> >> > >> > I wold love to see the ability to do proper snapshotting on KVM. >> >> > >> > XenServer >> >> > >> > does it so much better! >> >> > >> > >> >> > >> > ----- Original Message ----- >> >> > >> > >> >> > >> > > From: "Vladimir Melnik" <v.mel...@uplink.ua> >> >> > >> > > To: users@cloudstack.apache.org >> >> > >> > > Sent: Thursday, 30 October, 2014 8:09:17 PM >> >> > >> > > Subject: RE: XenServer >> >> > >> > >> >> > >> > > Oh, thank you so much, folks, for your replies on this topic! >> >> > >> > > Now >> >> > >> > > I >> >> > >> > > understand that I shouldn't migrate to XenServer, as I already >> >> > >> > > have >> >> > >> > > a bunch of hosts running KVM and it really won't be a good >> >> > >> > > idea >> >> > >> > > to >> >> > >> > > bread such a zoo. >> >> > >> > >> >> > >> > > The only thing that makes me feel envy is an ability to change >> >> > >> > > configuration of a virtual machine without restarting it. As I >> >> > >> > > know, >> >> > >> > > KVM doesn't support it yet, am I right? Other XenServer >> >> > >> > > features >> >> > >> > > don't seem to be so exciting to me :) >> >> > >> > >> >> > >> > > One more time - thanks to all who have helped me to decide not >> >> > >> > > to >> >> > >> > > do >> >> > >> > > something that I would regret. >> >> > >> > >> >> > >> > > Best regards, >> >> > >> > > V. >> >> > >> > >> >> > > >> >> > >> -- >> >> > >> Thanks for your support, >> >> > > > Motty >> >> >> > >> > >> > >> > -- >> > >> > Andrija Panić >> > -------------------------------------- >> > http://admintweets.com >> > -------------------------------------- >> > > > > -- > > Andrija Panić > -------------------------------------- > http://admintweets.com > --------------------------------------
