I''m pretty succesfull in deploying the xen cloud, but i only got 1 big issue at this moment, when i installed the host software, i just installed all the basic stuff, and now i would like to share the storage of node 1 with node 2, and vica versa so i can migrate (live?) vm''s from 1 to 2 and back, i created a storrage pool and this seemed to work.. but while trying to migrate i got an error that there was no shared sr.. is there a way to share the default hd''s of the 2 hosts? Thanks, Peter _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
The standard setups needs a third shared storage box exposing either iscsi or NFS, if you don''t want to do any hacks On Mon, Feb 8, 2010 at 12:52 PM, Peter den Hartog <peterdenhartog@gmail.com>wrote:> I''m pretty succesfull in deploying the xen cloud, but i only got 1 big > issue at this moment, when i installed the host software, i just installed > all the basic stuff, and now i would like to share the storage of node 1 > with node 2, and vica versa so i can migrate (live?) vm''s from 1 to 2 and > back, i created a storrage pool and this seemed to work.. but while trying > to migrate i got an error that there was no shared sr.. > > is there a way to share the default hd''s of the 2 hosts? > > Thanks, > Peter > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Peter den Hartog
2010-Feb-08 11:06 UTC
Re: [Xen-users] xen cloud - shared storage question
Ok that makes sense, so i would have to have an extra server configured with NFS that he uses to migrate, or are the actual VM''s have to be stored on that NFS sr? Because doesn''t that mean that you will have a single point of failure, the NFS server? On Mon, Feb 8, 2010 at 12:02 PM, Ahmed Kamal < email.ahmedkamal@googlemail.com> wrote:> The standard setups needs a third shared storage box exposing either iscsi > or NFS, if you don''t want to do any hacks > > On Mon, Feb 8, 2010 at 12:52 PM, Peter den Hartog < > peterdenhartog@gmail.com> wrote: > >> I''m pretty succesfull in deploying the xen cloud, but i only got 1 big >> issue at this moment, when i installed the host software, i just installed >> all the basic stuff, and now i would like to share the storage of node 1 >> with node 2, and vica versa so i can migrate (live?) vm''s from 1 to 2 and >> back, i created a storrage pool and this seemed to work.. but while trying >> to migrate i got an error that there was no shared sr.. >> >> is there a way to share the default hd''s of the 2 hosts? >> >> Thanks, >> Peter >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> http://lists.xensource.com/xen-users >> > >-- Groet // Kind regards, Peter den Hartog Sent from Amsterdam, NH, Netherlands _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Yes the VMs will be stored on the NFS sr, and yes that''s a SPOF. if you don''t like that, replicate the storage box On Mon, Feb 8, 2010 at 1:06 PM, Peter den Hartog <peterdenhartog@gmail.com>wrote:> Ok that makes sense, so i would have to have an extra server configured > with NFS that he uses to migrate, or are the actual VM''s have to be stored > on that NFS sr? Because doesn''t that mean that you will have a single point > of failure, the NFS server? > > > On Mon, Feb 8, 2010 at 12:02 PM, Ahmed Kamal < > email.ahmedkamal@googlemail.com> wrote: > >> The standard setups needs a third shared storage box exposing either iscsi >> or NFS, if you don''t want to do any hacks >> >> On Mon, Feb 8, 2010 at 12:52 PM, Peter den Hartog < >> peterdenhartog@gmail.com> wrote: >> >>> I''m pretty succesfull in deploying the xen cloud, but i only got 1 big >>> issue at this moment, when i installed the host software, i just installed >>> all the basic stuff, and now i would like to share the storage of node 1 >>> with node 2, and vica versa so i can migrate (live?) vm''s from 1 to 2 and >>> back, i created a storrage pool and this seemed to work.. but while trying >>> to migrate i got an error that there was no shared sr.. >>> >>> is there a way to share the default hd''s of the 2 hosts? >>> >>> Thanks, >>> Peter >>> >>> _______________________________________________ >>> Xen-users mailing list >>> Xen-users@lists.xensource.com >>> http://lists.xensource.com/xen-users >>> >> >> > > > -- > Groet // Kind regards, > Peter den Hartog > > Sent from Amsterdam, NH, Netherlands >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Peter den Hartog
2010-Feb-08 11:12 UTC
Re: [Xen-users] xen cloud - shared storage question
hehe it''s not that i don''t like it, the hole setup makes sense but i''m just thinking about how to implement this in my situation :-), so basicly let''s say i have 4 servers (physicial) i could take 2 for running the vm''s, and 2 for actualy holding the vm''s and replicate those last 2 servers with drbd or something like that.. On Mon, Feb 8, 2010 at 12:09 PM, Ahmed Kamal < email.ahmedkamal@googlemail.com> wrote:> Yes the VMs will be stored on the NFS sr, and yes that''s a SPOF. if you > don''t like that, replicate the storage box > > On Mon, Feb 8, 2010 at 1:06 PM, Peter den Hartog <peterdenhartog@gmail.com > > wrote: > >> Ok that makes sense, so i would have to have an extra server configured >> with NFS that he uses to migrate, or are the actual VM''s have to be stored >> on that NFS sr? Because doesn''t that mean that you will have a single point >> of failure, the NFS server? >> >> >> On Mon, Feb 8, 2010 at 12:02 PM, Ahmed Kamal < >> email.ahmedkamal@googlemail.com> wrote: >> >>> The standard setups needs a third shared storage box exposing either >>> iscsi or NFS, if you don''t want to do any hacks >>> >>> On Mon, Feb 8, 2010 at 12:52 PM, Peter den Hartog < >>> peterdenhartog@gmail.com> wrote: >>> >>>> I''m pretty succesfull in deploying the xen cloud, but i only got 1 big >>>> issue at this moment, when i installed the host software, i just installed >>>> all the basic stuff, and now i would like to share the storage of node 1 >>>> with node 2, and vica versa so i can migrate (live?) vm''s from 1 to 2 and >>>> back, i created a storrage pool and this seemed to work.. but while trying >>>> to migrate i got an error that there was no shared sr.. >>>> >>>> is there a way to share the default hd''s of the 2 hosts? >>>> >>>> Thanks, >>>> Peter >>>> >>>> _______________________________________________ >>>> Xen-users mailing list >>>> Xen-users@lists.xensource.com >>>> http://lists.xensource.com/xen-users >>>> >>> >>> >> >> >> -- >> Groet // Kind regards, >> Peter den Hartog >> >> Sent from Amsterdam, NH, Netherlands >> > >-- Groet // Kind regards, Peter den Hartog Sent from Amsterdam, NH, Netherlands _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
to me sounds like a plan. Except that assuming the storage box fails, nothing is gonna automate the failover to the second box .. you need to handle that (Mount disk, NFS share, take over IP .. etc) yourself I believe. But I''m no expert Another potential approach, is to try distributed fault tolerant filesystems a la glusterfs. If you go that route, I''d be interested in your conclusions though. Regards On Mon, Feb 8, 2010 at 1:12 PM, Peter den Hartog <peterdenhartog@gmail.com>wrote:> hehe it''s not that i don''t like it, the hole setup makes sense but i''m just > thinking about how to implement this in my situation :-), so basicly let''s > say i have 4 servers (physicial) i could take 2 for running the vm''s, and 2 > for actualy holding the vm''s and replicate those last 2 servers with drbd or > something like that.. > > > On Mon, Feb 8, 2010 at 12:09 PM, Ahmed Kamal < > email.ahmedkamal@googlemail.com> wrote: > >> Yes the VMs will be stored on the NFS sr, and yes that''s a SPOF. if you >> don''t like that, replicate the storage box >> >> On Mon, Feb 8, 2010 at 1:06 PM, Peter den Hartog < >> peterdenhartog@gmail.com> wrote: >> >>> Ok that makes sense, so i would have to have an extra server configured >>> with NFS that he uses to migrate, or are the actual VM''s have to be stored >>> on that NFS sr? Because doesn''t that mean that you will have a single point >>> of failure, the NFS server? >>> >>> >>> On Mon, Feb 8, 2010 at 12:02 PM, Ahmed Kamal < >>> email.ahmedkamal@googlemail.com> wrote: >>> >>>> The standard setups needs a third shared storage box exposing either >>>> iscsi or NFS, if you don''t want to do any hacks >>>> >>>> On Mon, Feb 8, 2010 at 12:52 PM, Peter den Hartog < >>>> peterdenhartog@gmail.com> wrote: >>>> >>>>> I''m pretty succesfull in deploying the xen cloud, but i only got 1 big >>>>> issue at this moment, when i installed the host software, i just installed >>>>> all the basic stuff, and now i would like to share the storage of node 1 >>>>> with node 2, and vica versa so i can migrate (live?) vm''s from 1 to 2 and >>>>> back, i created a storrage pool and this seemed to work.. but while trying >>>>> to migrate i got an error that there was no shared sr.. >>>>> >>>>> is there a way to share the default hd''s of the 2 hosts? >>>>> >>>>> Thanks, >>>>> Peter >>>>> >>>>> _______________________________________________ >>>>> Xen-users mailing list >>>>> Xen-users@lists.xensource.com >>>>> http://lists.xensource.com/xen-users >>>>> >>>> >>>> >>> >>> >>> -- >>> Groet // Kind regards, >>> Peter den Hartog >>> >>> Sent from Amsterdam, NH, Netherlands >>> >> >> > > > -- > Groet // Kind regards, > Peter den Hartog > > Sent from Amsterdam, NH, Netherlands >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Id think you could use a multiple target iSCSI configurations also with 2 servers running On Mon, Feb 8, 2010 at 6:25 AM, Ahmed Kamal <email.ahmedkamal@googlemail.com> wrote:> to me sounds like a plan. Except that assuming the storage box fails, > nothing is gonna automate the failover to the second box .. you need to > handle that (Mount disk, NFS share, take over IP .. etc) yourself I believe. > But I''m no expert > > Another potential approach, is to try distributed fault tolerant > filesystems a la glusterfs. If you go that route, I''d be interested in your > conclusions though. > > Regards > > > On Mon, Feb 8, 2010 at 1:12 PM, Peter den Hartog <peterdenhartog@gmail.com > > wrote: > >> hehe it''s not that i don''t like it, the hole setup makes sense but i''m >> just thinking about how to implement this in my situation :-), so basicly >> let''s say i have 4 servers (physicial) i could take 2 for running the vm''s, >> and 2 for actualy holding the vm''s and replicate those last 2 servers with >> drbd or something like that.. >> >> >> On Mon, Feb 8, 2010 at 12:09 PM, Ahmed Kamal < >> email.ahmedkamal@googlemail.com> wrote: >> >>> Yes the VMs will be stored on the NFS sr, and yes that''s a SPOF. if you >>> don''t like that, replicate the storage box >>> >>> On Mon, Feb 8, 2010 at 1:06 PM, Peter den Hartog < >>> peterdenhartog@gmail.com> wrote: >>> >>>> Ok that makes sense, so i would have to have an extra server configured >>>> with NFS that he uses to migrate, or are the actual VM''s have to be stored >>>> on that NFS sr? Because doesn''t that mean that you will have a single point >>>> of failure, the NFS server? >>>> >>>> >>>> On Mon, Feb 8, 2010 at 12:02 PM, Ahmed Kamal < >>>> email.ahmedkamal@googlemail.com> wrote: >>>> >>>>> The standard setups needs a third shared storage box exposing either >>>>> iscsi or NFS, if you don''t want to do any hacks >>>>> >>>>> On Mon, Feb 8, 2010 at 12:52 PM, Peter den Hartog < >>>>> peterdenhartog@gmail.com> wrote: >>>>> >>>>>> I''m pretty succesfull in deploying the xen cloud, but i only got 1 big >>>>>> issue at this moment, when i installed the host software, i just installed >>>>>> all the basic stuff, and now i would like to share the storage of node 1 >>>>>> with node 2, and vica versa so i can migrate (live?) vm''s from 1 to 2 and >>>>>> back, i created a storrage pool and this seemed to work.. but while trying >>>>>> to migrate i got an error that there was no shared sr.. >>>>>> >>>>>> is there a way to share the default hd''s of the 2 hosts? >>>>>> >>>>>> Thanks, >>>>>> Peter >>>>>> >>>>>> _______________________________________________ >>>>>> Xen-users mailing list >>>>>> Xen-users@lists.xensource.com >>>>>> http://lists.xensource.com/xen-users >>>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> Groet // Kind regards, >>>> Peter den Hartog >>>> >>>> Sent from Amsterdam, NH, Netherlands >>>> >>> >>> >> >> >> -- >> Groet // Kind regards, >> Peter den Hartog >> >> Sent from Amsterdam, NH, Netherlands >> > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Peter den Hartog
2010-Feb-08 12:21 UTC
Re: [Xen-users] xen cloud - shared storage question
You can actualy use keepalived for that, it''s an IP failover program, that''s capaible of realising it become master and adding an VIF to the server, then you can start some services (it can execute stuff on becoming master/slave) So then you can do the mount disking, the nfs sharing with that, the IP failover is allready in keepalived, so then your done i think, i have a bit of experiance with failover and xen so i should be able to work something out :-) On Mon, Feb 8, 2010 at 12:25 PM, Ahmed Kamal < email.ahmedkamal@googlemail.com> wrote:> to me sounds like a plan. Except that assuming the storage box fails, > nothing is gonna automate the failover to the second box .. you need to > handle that (Mount disk, NFS share, take over IP .. etc) yourself I believe. > But I''m no expert > > Another potential approach, is to try distributed fault tolerant > filesystems a la glusterfs. If you go that route, I''d be interested in your > conclusions though. > > Regards > > > On Mon, Feb 8, 2010 at 1:12 PM, Peter den Hartog <peterdenhartog@gmail.com > > wrote: > >> hehe it''s not that i don''t like it, the hole setup makes sense but i''m >> just thinking about how to implement this in my situation :-), so basicly >> let''s say i have 4 servers (physicial) i could take 2 for running the vm''s, >> and 2 for actualy holding the vm''s and replicate those last 2 servers with >> drbd or something like that.. >> >> >> On Mon, Feb 8, 2010 at 12:09 PM, Ahmed Kamal < >> email.ahmedkamal@googlemail.com> wrote: >> >>> Yes the VMs will be stored on the NFS sr, and yes that''s a SPOF. if you >>> don''t like that, replicate the storage box >>> >>> On Mon, Feb 8, 2010 at 1:06 PM, Peter den Hartog < >>> peterdenhartog@gmail.com> wrote: >>> >>>> Ok that makes sense, so i would have to have an extra server configured >>>> with NFS that he uses to migrate, or are the actual VM''s have to be stored >>>> on that NFS sr? Because doesn''t that mean that you will have a single point >>>> of failure, the NFS server? >>>> >>>> >>>> On Mon, Feb 8, 2010 at 12:02 PM, Ahmed Kamal < >>>> email.ahmedkamal@googlemail.com> wrote: >>>> >>>>> The standard setups needs a third shared storage box exposing either >>>>> iscsi or NFS, if you don''t want to do any hacks >>>>> >>>>> On Mon, Feb 8, 2010 at 12:52 PM, Peter den Hartog < >>>>> peterdenhartog@gmail.com> wrote: >>>>> >>>>>> I''m pretty succesfull in deploying the xen cloud, but i only got 1 big >>>>>> issue at this moment, when i installed the host software, i just installed >>>>>> all the basic stuff, and now i would like to share the storage of node 1 >>>>>> with node 2, and vica versa so i can migrate (live?) vm''s from 1 to 2 and >>>>>> back, i created a storrage pool and this seemed to work.. but while trying >>>>>> to migrate i got an error that there was no shared sr.. >>>>>> >>>>>> is there a way to share the default hd''s of the 2 hosts? >>>>>> >>>>>> Thanks, >>>>>> Peter >>>>>> >>>>>> _______________________________________________ >>>>>> Xen-users mailing list >>>>>> Xen-users@lists.xensource.com >>>>>> http://lists.xensource.com/xen-users >>>>>> >>>>> >>>>> >>>> >>>> >>>> -- >>>> Groet // Kind regards, >>>> Peter den Hartog >>>> >>>> Sent from Amsterdam, NH, Netherlands >>>> >>> >>> >> >> >> -- >> Groet // Kind regards, >> Peter den Hartog >> >> Sent from Amsterdam, NH, Netherlands >> > >-- Groet // Kind regards, Peter den Hartog _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Peter den Hartog
2010-Feb-08 12:22 UTC
Re: [Xen-users] xen cloud - shared storage question
thank you for that input, i''lll look in to that. :> On Mon, Feb 8, 2010 at 12:53 PM, Outback Dingo <outbackdingo@gmail.com>wrote:> Id think you could use a multiple target iSCSI configurations also with 2 > servers running > > > On Mon, Feb 8, 2010 at 6:25 AM, Ahmed Kamal < > email.ahmedkamal@googlemail.com> wrote: > >> to me sounds like a plan. Except that assuming the storage box fails, >> nothing is gonna automate the failover to the second box .. you need to >> handle that (Mount disk, NFS share, take over IP .. etc) yourself I believe. >> But I''m no expert >> >> Another potential approach, is to try distributed fault tolerant >> filesystems a la glusterfs. If you go that route, I''d be interested in your >> conclusions though. >> >> Regards >> >> >> On Mon, Feb 8, 2010 at 1:12 PM, Peter den Hartog < >> peterdenhartog@gmail.com> wrote: >> >>> hehe it''s not that i don''t like it, the hole setup makes sense but i''m >>> just thinking about how to implement this in my situation :-), so basicly >>> let''s say i have 4 servers (physicial) i could take 2 for running the vm''s, >>> and 2 for actualy holding the vm''s and replicate those last 2 servers with >>> drbd or something like that.. >>> >>> >>> On Mon, Feb 8, 2010 at 12:09 PM, Ahmed Kamal < >>> email.ahmedkamal@googlemail.com> wrote: >>> >>>> Yes the VMs will be stored on the NFS sr, and yes that''s a SPOF. if you >>>> don''t like that, replicate the storage box >>>> >>>> On Mon, Feb 8, 2010 at 1:06 PM, Peter den Hartog < >>>> peterdenhartog@gmail.com> wrote: >>>> >>>>> Ok that makes sense, so i would have to have an extra server configured >>>>> with NFS that he uses to migrate, or are the actual VM''s have to be stored >>>>> on that NFS sr? Because doesn''t that mean that you will have a single point >>>>> of failure, the NFS server? >>>>> >>>>> >>>>> On Mon, Feb 8, 2010 at 12:02 PM, Ahmed Kamal < >>>>> email.ahmedkamal@googlemail.com> wrote: >>>>> >>>>>> The standard setups needs a third shared storage box exposing either >>>>>> iscsi or NFS, if you don''t want to do any hacks >>>>>> >>>>>> On Mon, Feb 8, 2010 at 12:52 PM, Peter den Hartog < >>>>>> peterdenhartog@gmail.com> wrote: >>>>>> >>>>>>> I''m pretty succesfull in deploying the xen cloud, but i only got 1 >>>>>>> big issue at this moment, when i installed the host software, i just >>>>>>> installed all the basic stuff, and now i would like to share the storage of >>>>>>> node 1 with node 2, and vica versa so i can migrate (live?) vm''s from 1 to 2 >>>>>>> and back, i created a storrage pool and this seemed to work.. but while >>>>>>> trying to migrate i got an error that there was no shared sr.. >>>>>>> >>>>>>> is there a way to share the default hd''s of the 2 hosts? >>>>>>> >>>>>>> Thanks, >>>>>>> Peter >>>>>>> >>>>>>> _______________________________________________ >>>>>>> Xen-users mailing list >>>>>>> Xen-users@lists.xensource.com >>>>>>> http://lists.xensource.com/xen-users >>>>>>> >>>>>> >>>>>> >>>>> >>>>> >>>>> -- >>>>> Groet // Kind regards, >>>>> Peter den Hartog >>>>> >>>>> Sent from Amsterdam, NH, Netherlands >>>>> >>>> >>>> >>> >>> >>> -- >>> Groet // Kind regards, >>> Peter den Hartog >>> >>> Sent from Amsterdam, NH, Netherlands >>> >> >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> http://lists.xensource.com/xen-users >> > >-- Groet // Kind regards, Peter den Hartog Sent from Amsterdam, NH, Netherlands _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Mon, Feb 8, 2010 at 1:02 PM, Ahmed Kamal <email.ahmedkamal@googlemail.com> wrote:> The standard setups needs a third shared storage box exposing either iscsi > or NFS, if you don''t want to do any hacks > >As matter of interest, with today''s more powerful servers, is it possible to setup a "shared storage box" on the cloud servers themselves? i.e. you have 2x dual Core i7 + 12GB RAM + 4x400GB SAS HDD''s, then you setup glusterFS on both boxes and create an active-active sync "NAS" - and the VM''s run straight from there. This, to me, sounds like a theory, and a very good one at that. But, how does / would it work in practice? the VM''s have a direct connection to the shared storage, and the shared storage sync between the servers on a separate GB link. Has anyone done this? Is it possible? Why would I want to go this router? Simple, to save space, energy, costs (which can be used elsewhere: marketing , sales, software, etc) & carbon footprint. The processing power we have in one single 1U server today is far better than what we used to get in much larger servers 3 years ago. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Only if you use a VM to do the storage. The XCP hosts are not equipped to act as a storage server. What is the huge attraction to doing this? Vern Sent from my BlackBerry® wireless device from U.S. Cellular -----Original Message----- From: Rudi Ahlers <rudiahlers@gmail.com> Date: Tue, 9 Feb 2010 14:36:27 To: Ahmed Kamal<email.ahmedkamal@googlemail.com> Cc: Peter den Hartog<peterdenhartog@gmail.com>; <xen-users@lists.xensource.com> Subject: Re: [Xen-users] xen cloud - shared storage question _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Nathan Eisenberg
2010-Feb-10 17:03 UTC
RE: [Xen-users] xen cloud - shared storage question
I would avoid this. Most of this kind of storage technology is reliant on local CPU power. By putting it on boxes that are also doing other work, you''re going to end up increasing the latency of the storage. Plus, I don''t believe this scales past two boxes - centralized, dedicated SAN stuff is pretty much crucial if you''re looking to roll out 300 VMs across 20 compute nodes. Best Regards, Nathan Eisenberg Sr. Systems Administrator - Atlas Networks, LLC office: 206.577.3078 | suncadia: 206.210.5450 www.atlasnetworks.us | www.suncadianet.com From: xen-users-bounces@lists.xensource.com [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Rudi Ahlers Sent: Tuesday, February 09, 2010 4:36 AM To: Ahmed Kamal Cc: Peter den Hartog; xen-users@lists.xensource.com Subject: Re: [Xen-users] xen cloud - shared storage question On Mon, Feb 8, 2010 at 1:02 PM, Ahmed Kamal <email.ahmedkamal@googlemail.com<mailto:email.ahmedkamal@googlemail.com>> wrote: The standard setups needs a third shared storage box exposing either iscsi or NFS, if you don''t want to do any hacks As matter of interest, with today''s more powerful servers, is it possible to setup a "shared storage box" on the cloud servers themselves? i.e. you have 2x dual Core i7 + 12GB RAM + 4x400GB SAS HDD''s, then you setup glusterFS on both boxes and create an active-active sync "NAS" - and the VM''s run straight from there. This, to me, sounds like a theory, and a very good one at that. But, how does / would it work in practice? the VM''s have a direct connection to the shared storage, and the shared storage sync between the servers on a separate GB link. Has anyone done this? Is it possible? Why would I want to go this router? Simple, to save space, energy, costs (which can be used elsewhere: marketing , sales, software, etc) & carbon footprint. The processing power we have in one single 1U server today is far better than what we used to get in much larger servers 3 years ago. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532 _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
If you know DRBD, why not to use it on Dom0 ? Xen can directly use "drbd" devices. Olivier Peter den Hartog a écrit :> hehe it''s not that i don''t like it, the hole setup makes sense but i''m > just thinking about how to implement this in my situation :-), so > basicly let''s say i have 4 servers (physicial) i could take 2 for > running the vm''s, and 2 for actualy holding the vm''s and replicate > those last 2 servers with drbd or something like that.. > > On Mon, Feb 8, 2010 at 12:09 PM, Ahmed Kamal > <email.ahmedkamal@googlemail.com > <mailto:email.ahmedkamal@googlemail.com>> wrote: > > Yes the VMs will be stored on the NFS sr, and yes that''s a SPOF. > if you don''t like that, replicate the storage box > > On Mon, Feb 8, 2010 at 1:06 PM, Peter den Hartog > <peterdenhartog@gmail.com <mailto:peterdenhartog@gmail.com>> wrote: > > Ok that makes sense, so i would have to have an extra server > configured with NFS that he uses to migrate, or are the actual > VM''s have to be stored on that NFS sr? Because doesn''t that > mean that you will have a single point of failure, the NFS > server? > > > On Mon, Feb 8, 2010 at 12:02 PM, Ahmed Kamal > <email.ahmedkamal@googlemail.com > <mailto:email.ahmedkamal@googlemail.com>> wrote: > > The standard setups needs a third shared storage box > exposing either iscsi or NFS, if you don''t want to do any > hacks > > On Mon, Feb 8, 2010 at 12:52 PM, Peter den Hartog > <peterdenhartog@gmail.com > <mailto:peterdenhartog@gmail.com>> wrote: > > I''m pretty succesfull in deploying the xen cloud, but > i only got 1 big issue at this moment, when i > installed the host software, i just installed all the > basic stuff, and now i would like to share the storage > of node 1 with node 2, and vica versa so i can migrate > (live?) vm''s from 1 to 2 and back, i created a > storrage pool and this seemed to work.. but while > trying to migrate i got an error that there was no > shared sr.. > > is there a way to share the default hd''s of the 2 hosts? > > Thanks, > Peter > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > <mailto:Xen-users@lists.xensource.com> > http://lists.xensource.com/xen-users > > > > > > -- > Groet // Kind regards, > Peter den Hartog > > Sent from Amsterdam, NH, Netherlands > > > > > > -- > Groet // Kind regards, > Peter den Hartog > > Sent from Amsterdam, NH, Netherlands > ------------------------------------------------------------------------ > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Peter den Hartog
2010-Feb-11 16:54 UTC
Re: [Xen-users] xen cloud - shared storage question
Good point :D i''ll think about this, playing arround with xen 4 at the moment tho for the sync of vm function.. maby that''s a better solution for my problem :) On Wed, Feb 10, 2010 at 10:21 PM, Olivier B. <xen.list@daevel.fr> wrote:> If you know DRBD, why not to use it on Dom0 ? Xen can directly use "drbd" > devices. > > Olivier > > Peter den Hartog a écrit : > >> hehe it''s not that i don''t like it, the hole setup makes sense but i''m >> just thinking about how to implement this in my situation :-), so basicly >> let''s say i have 4 servers (physicial) i could take 2 for running the vm''s, >> and 2 for actualy holding the vm''s and replicate those last 2 servers with >> drbd or something like that.. >> >> On Mon, Feb 8, 2010 at 12:09 PM, Ahmed Kamal < >> email.ahmedkamal@googlemail.com <mailto:email.ahmedkamal@googlemail.com>> >> wrote: >> >> Yes the VMs will be stored on the NFS sr, and yes that''s a SPOF. >> if you don''t like that, replicate the storage box >> >> On Mon, Feb 8, 2010 at 1:06 PM, Peter den Hartog >> <peterdenhartog@gmail.com <mailto:peterdenhartog@gmail.com>> wrote: >> >> Ok that makes sense, so i would have to have an extra server >> configured with NFS that he uses to migrate, or are the actual >> VM''s have to be stored on that NFS sr? Because doesn''t that >> mean that you will have a single point of failure, the NFS >> server? >> >> On Mon, Feb 8, 2010 at 12:02 PM, Ahmed Kamal >> <email.ahmedkamal@googlemail.com >> <mailto:email.ahmedkamal@googlemail.com>> wrote: >> >> The standard setups needs a third shared storage box >> exposing either iscsi or NFS, if you don''t want to do any >> hacks >> >> On Mon, Feb 8, 2010 at 12:52 PM, Peter den Hartog >> <peterdenhartog@gmail.com >> <mailto:peterdenhartog@gmail.com>> wrote: >> >> I''m pretty succesfull in deploying the xen cloud, but >> i only got 1 big issue at this moment, when i >> installed the host software, i just installed all the >> basic stuff, and now i would like to share the storage >> of node 1 with node 2, and vica versa so i can migrate >> (live?) vm''s from 1 to 2 and back, i created a >> storrage pool and this seemed to work.. but while >> trying to migrate i got an error that there was no >> shared sr.. >> >> is there a way to share the default hd''s of the 2 hosts? >> >> Thanks, >> Peter >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> <mailto:Xen-users@lists.xensource.com> >> >> http://lists.xensource.com/xen-users >> >> >> >> >> >> -- Groet // Kind regards, >> Peter den Hartog >> >> Sent from Amsterdam, NH, Netherlands >> >> >> >> >> >> -- >> Groet // Kind regards, >> Peter den Hartog >> >> Sent from Amsterdam, NH, Netherlands >> ------------------------------------------------------------------------ >> >> >> _______________________________________________ >> Xen-users mailing list >> Xen-users@lists.xensource.com >> http://lists.xensource.com/xen-users >> > > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users >-- Groet // Kind regards, Peter den Hartog _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users