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Posted to dev@cloudstack.apache.org by Rafael Weingartner <ra...@gmail.com> on 2015/03/31 22:36:38 UTC
Cloudstack and KVM clusters,
Hi folks,
I was looking a matrix of Cloudstack compatibility matrix at
http://pt.slideshare.net/TimMackey/hypervisor-31754727,
Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
true? Is it possible to live migrate VMs between KVM hosts that are not
clustered in CS?
--
Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Rafael Weingartner <ra...@gmail.com>.
Got it.
On Tue, Mar 31, 2015 at 6:05 PM, Mike Tutkowski <
mike.tutkowski@solidfire.com> wrote:
> KVM itself does not have native clustering.
>
> In CloudStack, you do, in fact, put KVM hosts in clusters.
>
> On Tue, Mar 31, 2015 at 2:36 PM, Rafael Weingartner <
> rafaelweingartner@gmail.com> wrote:
>
> > Hi folks,
> >
> > I was looking a matrix of Cloudstack compatibility matrix at
> > http://pt.slideshare.net/TimMackey/hypervisor-31754727,
> >
> > Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is
> that
> > true? Is it possible to live migrate VMs between KVM hosts that are not
> > clustered in CS?
> >
> >
> > --
> > Rafael Weingärtner
> >
>
>
>
> --
> *Mike Tutkowski*
> *Senior CloudStack Developer, SolidFire Inc.*
> e: mike.tutkowski@solidfire.com
> o: 303.746.7302
> Advancing the way the world uses the cloud
> <http://solidfire.com/solution/overview/?video=play>*™*
>
--
Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Rafael Weingartner <ra...@gmail.com>.
Got it.
On Tue, Mar 31, 2015 at 6:05 PM, Mike Tutkowski <
mike.tutkowski@solidfire.com> wrote:
> KVM itself does not have native clustering.
>
> In CloudStack, you do, in fact, put KVM hosts in clusters.
>
> On Tue, Mar 31, 2015 at 2:36 PM, Rafael Weingartner <
> rafaelweingartner@gmail.com> wrote:
>
> > Hi folks,
> >
> > I was looking a matrix of Cloudstack compatibility matrix at
> > http://pt.slideshare.net/TimMackey/hypervisor-31754727,
> >
> > Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is
> that
> > true? Is it possible to live migrate VMs between KVM hosts that are not
> > clustered in CS?
> >
> >
> > --
> > Rafael Weingärtner
> >
>
>
>
> --
> *Mike Tutkowski*
> *Senior CloudStack Developer, SolidFire Inc.*
> e: mike.tutkowski@solidfire.com
> o: 303.746.7302
> Advancing the way the world uses the cloud
> <http://solidfire.com/solution/overview/?video=play>*™*
>
--
Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Mike Tutkowski <mi...@solidfire.com>.
KVM itself does not have native clustering.
In CloudStack, you do, in fact, put KVM hosts in clusters.
On Tue, Mar 31, 2015 at 2:36 PM, Rafael Weingartner <
rafaelweingartner@gmail.com> wrote:
> Hi folks,
>
> I was looking a matrix of Cloudstack compatibility matrix at
> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
>
> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
> true? Is it possible to live migrate VMs between KVM hosts that are not
> clustered in CS?
>
>
> --
> Rafael Weingärtner
>
--
*Mike Tutkowski*
*Senior CloudStack Developer, SolidFire Inc.*
e: mike.tutkowski@solidfire.com
o: 303.746.7302
Advancing the way the world uses the cloud
<http://solidfire.com/solution/overview/?video=play>*™*
Re: Cloudstack and KVM clusters,
Posted by Mike Tutkowski <mi...@solidfire.com>.
KVM itself does not have native clustering.
In CloudStack, you do, in fact, put KVM hosts in clusters.
On Tue, Mar 31, 2015 at 2:36 PM, Rafael Weingartner <
rafaelweingartner@gmail.com> wrote:
> Hi folks,
>
> I was looking a matrix of Cloudstack compatibility matrix at
> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
>
> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
> true? Is it possible to live migrate VMs between KVM hosts that are not
> clustered in CS?
>
>
> --
> Rafael Weingärtner
>
--
*Mike Tutkowski*
*Senior CloudStack Developer, SolidFire Inc.*
e: mike.tutkowski@solidfire.com
o: 303.746.7302
Advancing the way the world uses the cloud
<http://solidfire.com/solution/overview/?video=play>*™*
Re: Cloudstack and KVM clusters,
Posted by Andrei Mikhailovsky <an...@arhont.com>.
I would highly recommend looking at the Ceph storage instead of using too many tiers of complications. Ceph integrates well with kvm and cloudstack and has proven to work very well over the years.
Andrei
----- Original Message -----
> From: "chiu ching cheng" <cc...@gmail.com>
> To: users@cloudstack.apache.org
> Cc: dev@cloudstack.apache.org
> Sent: Wednesday, 1 April, 2015 2:31:42 AM
> Subject: Re: Cloudstack and KVM clusters,
> If I wnat to build a kvm native cluster with gfs2 + DLM , and use
> iscsi +
> DRBD in storage .
> Then add the kvm cluster to cloudstack , and add the SharedMountPoint
> to
> cloudstack as primary storage , Does it work ?
> On Wed, Apr 1, 2015 at 6:12 AM, Marcus <sh...@gmail.com> wrote:
> > Don't forget SharedMountPoint. This (in theory, haven't tried it
> > recently) allows you to use any clustered filesystem that has a
> > consistent mountpoint across all KVM hosts in a CS cluster, e.g.
> > mount
> > an OCFS2 to /vmstore1 then register /vmstore1 as a
> > SharedMountPoint.
> >
> > The Ceph support is in the form of RBD, by the way. You could use
> > CephFS if you wished via SharedMountPoint.
> >
> > On Tue, Mar 31, 2015 at 2:09 PM, Simon Weller <sw...@ena.com>
> > wrote:
> > > The hosts need to be part of the same Cloudstack cluster, and
> > > depending
> > on the underlying storage technology, you may need a clustered file
> > system
> > as well.
> > >
> > > A Cloudstack cluster is basically a group of physical hosts.
> > >
> > > For example:
> > >
> > > You build a new Zone in Cloudstack. Under the zone you have a
> > > pod.
> > Within the pod, you build a new cluster (just a group of hosts).
> > Then you
> > assigned 4 servers (hosts) into that cluster. You will be able to
> > live
> > migrate between the 4 hosts assuming the original mentioned
> > criteria are
> > met.
> > >
> > > - Si
> > >
> > > ________________________________________
> > > From: Rafael Weingartner <ra...@gmail.com>
> > > Sent: Tuesday, March 31, 2015 4:02 PM
> > > To: dev@cloudstack.apache.org
> > > Cc: users@cloudstack.apache.org
> > > Subject: Re: Cloudstack and KVM clusters,
> > >
> > > Thanks Simon,
> > >
> > >
> > > I think I got it.
> > >
> > > So, the hosts do not need to be in a cluster to perform the live
> > migration.
> > >
> > > On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com>
> > > wrote:
> > >
> > >> Rafael,
> > >>
> > >> KVM live migration really relies on whether the underlying
> > >> shared
> > storage
> > >> (and file system) supports the ability to provide data
> > >> consistency
> > during a
> > >> migration. You never ever want a situation where 2 hosts are
> > >> able to
> > mount
> > >> and write to the same volume concurrently.
> > >>
> > >> You can live migrate in KVM today using the following underlying
> > >> file
> > >> systems/methods:
> > >>
> > >> 1. NFS
> > >> 2. CEPH
> > >> 3. Clustered Logical Volume Management (CLVM) on top of SAN
> > >> exposed
> > >> storage via iSCSI,FC or FCOE.
> > >>
> > >> It's also possible to build your own storage driver and set a
> > >> LUN to
> > read
> > >> only on a particular host using your SANs API.
> > >>
> > >> Solidfire, Nexenta and Cloudbyte have also added storage drivers
> > >> more
> > >> recently that may provide support for live migration, but as I'm
> > >> not
> > >> personally familiar with these storage platforms, I'll leave it
> > >> up to
> > >> others to comment if they wish.
> > >>
> > >> - Si
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> ________________________________________
> > >> From: Rafael Weingartner <ra...@gmail.com>
> > >> Sent: Tuesday, March 31, 2015 3:36 PM
> > >> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
> > >> Subject: Cloudstack and KVM clusters,
> > >>
> > >> Hi folks,
> > >>
> > >> I was looking a matrix of Cloudstack compatibility matrix at
> > >> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
> > >>
> > >> Slide 25 seemed to show that we cannot have clusters of KVM in
> > >> CS? Is
> > that
> > >> true? Is it possible to live migrate VMs between KVM hosts that
> > >> are not
> > >> clustered in CS?
> > >>
> > >>
> > >> --
> > >> Rafael Weingärtner
> > >>
> > >
> > >
> > >
> > > --
> > > Rafael Weingärtner
> >
Re: Cloudstack and KVM clusters,
Posted by Nux! <nu...@li.nux.ro>.
Yes, Chiu.
--
Sent from the Delta quadrant using Borg technology!
Nux!
www.nux.ro
----- Original Message -----
> From: "chiu ching cheng" <cc...@gmail.com>
> To: users@cloudstack.apache.org
> Cc: dev@cloudstack.apache.org
> Sent: Wednesday, 1 April, 2015 02:31:42
> Subject: Re: Cloudstack and KVM clusters,
> If I wnat to build a kvm native cluster with gfs2 + DLM , and use iscsi +
> DRBD in storage .
>
> Then add the kvm cluster to cloudstack , and add the SharedMountPoint to
> cloudstack as primary storage , Does it work ?
>
> On Wed, Apr 1, 2015 at 6:12 AM, Marcus <sh...@gmail.com> wrote:
>
>> Don't forget SharedMountPoint. This (in theory, haven't tried it
>> recently) allows you to use any clustered filesystem that has a
>> consistent mountpoint across all KVM hosts in a CS cluster, e.g. mount
>> an OCFS2 to /vmstore1 then register /vmstore1 as a SharedMountPoint.
>>
>> The Ceph support is in the form of RBD, by the way. You could use
>> CephFS if you wished via SharedMountPoint.
>>
>> On Tue, Mar 31, 2015 at 2:09 PM, Simon Weller <sw...@ena.com> wrote:
>> > The hosts need to be part of the same Cloudstack cluster, and depending
>> on the underlying storage technology, you may need a clustered file system
>> as well.
>> >
>> > A Cloudstack cluster is basically a group of physical hosts.
>> >
>> > For example:
>> >
>> > You build a new Zone in Cloudstack. Under the zone you have a pod.
>> Within the pod, you build a new cluster (just a group of hosts). Then you
>> assigned 4 servers (hosts) into that cluster. You will be able to live
>> migrate between the 4 hosts assuming the original mentioned criteria are
>> met.
>> >
>> > - Si
>> >
>> > ________________________________________
>> > From: Rafael Weingartner <ra...@gmail.com>
>> > Sent: Tuesday, March 31, 2015 4:02 PM
>> > To: dev@cloudstack.apache.org
>> > Cc: users@cloudstack.apache.org
>> > Subject: Re: Cloudstack and KVM clusters,
>> >
>> > Thanks Simon,
>> >
>> >
>> > I think I got it.
>> >
>> > So, the hosts do not need to be in a cluster to perform the live
>> migration.
>> >
>> > On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com> wrote:
>> >
>> >> Rafael,
>> >>
>> >> KVM live migration really relies on whether the underlying shared
>> storage
>> >> (and file system) supports the ability to provide data consistency
>> during a
>> >> migration. You never ever want a situation where 2 hosts are able to
>> mount
>> >> and write to the same volume concurrently.
>> >>
>> >> You can live migrate in KVM today using the following underlying file
>> >> systems/methods:
>> >>
>> >> 1. NFS
>> >> 2. CEPH
>> >> 3. Clustered Logical Volume Management (CLVM) on top of SAN exposed
>> >> storage via iSCSI,FC or FCOE.
>> >>
>> >> It's also possible to build your own storage driver and set a LUN to
>> read
>> >> only on a particular host using your SANs API.
>> >>
>> >> Solidfire, Nexenta and Cloudbyte have also added storage drivers more
>> >> recently that may provide support for live migration, but as I'm not
>> >> personally familiar with these storage platforms, I'll leave it up to
>> >> others to comment if they wish.
>> >>
>> >> - Si
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> ________________________________________
>> >> From: Rafael Weingartner <ra...@gmail.com>
>> >> Sent: Tuesday, March 31, 2015 3:36 PM
>> >> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
>> >> Subject: Cloudstack and KVM clusters,
>> >>
>> >> Hi folks,
>> >>
>> >> I was looking a matrix of Cloudstack compatibility matrix at
>> >> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
>> >>
>> >> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is
>> that
>> >> true? Is it possible to live migrate VMs between KVM hosts that are not
>> >> clustered in CS?
>> >>
>> >>
>> >> --
>> >> Rafael Weingärtner
>> >>
>> >
>> >
>> >
>> > --
>> > Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Andrei Mikhailovsky <an...@arhont.com>.
I would highly recommend looking at the Ceph storage instead of using too many tiers of complications. Ceph integrates well with kvm and cloudstack and has proven to work very well over the years.
Andrei
----- Original Message -----
> From: "chiu ching cheng" <cc...@gmail.com>
> To: users@cloudstack.apache.org
> Cc: dev@cloudstack.apache.org
> Sent: Wednesday, 1 April, 2015 2:31:42 AM
> Subject: Re: Cloudstack and KVM clusters,
> If I wnat to build a kvm native cluster with gfs2 + DLM , and use
> iscsi +
> DRBD in storage .
> Then add the kvm cluster to cloudstack , and add the SharedMountPoint
> to
> cloudstack as primary storage , Does it work ?
> On Wed, Apr 1, 2015 at 6:12 AM, Marcus <sh...@gmail.com> wrote:
> > Don't forget SharedMountPoint. This (in theory, haven't tried it
> > recently) allows you to use any clustered filesystem that has a
> > consistent mountpoint across all KVM hosts in a CS cluster, e.g.
> > mount
> > an OCFS2 to /vmstore1 then register /vmstore1 as a
> > SharedMountPoint.
> >
> > The Ceph support is in the form of RBD, by the way. You could use
> > CephFS if you wished via SharedMountPoint.
> >
> > On Tue, Mar 31, 2015 at 2:09 PM, Simon Weller <sw...@ena.com>
> > wrote:
> > > The hosts need to be part of the same Cloudstack cluster, and
> > > depending
> > on the underlying storage technology, you may need a clustered file
> > system
> > as well.
> > >
> > > A Cloudstack cluster is basically a group of physical hosts.
> > >
> > > For example:
> > >
> > > You build a new Zone in Cloudstack. Under the zone you have a
> > > pod.
> > Within the pod, you build a new cluster (just a group of hosts).
> > Then you
> > assigned 4 servers (hosts) into that cluster. You will be able to
> > live
> > migrate between the 4 hosts assuming the original mentioned
> > criteria are
> > met.
> > >
> > > - Si
> > >
> > > ________________________________________
> > > From: Rafael Weingartner <ra...@gmail.com>
> > > Sent: Tuesday, March 31, 2015 4:02 PM
> > > To: dev@cloudstack.apache.org
> > > Cc: users@cloudstack.apache.org
> > > Subject: Re: Cloudstack and KVM clusters,
> > >
> > > Thanks Simon,
> > >
> > >
> > > I think I got it.
> > >
> > > So, the hosts do not need to be in a cluster to perform the live
> > migration.
> > >
> > > On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com>
> > > wrote:
> > >
> > >> Rafael,
> > >>
> > >> KVM live migration really relies on whether the underlying
> > >> shared
> > storage
> > >> (and file system) supports the ability to provide data
> > >> consistency
> > during a
> > >> migration. You never ever want a situation where 2 hosts are
> > >> able to
> > mount
> > >> and write to the same volume concurrently.
> > >>
> > >> You can live migrate in KVM today using the following underlying
> > >> file
> > >> systems/methods:
> > >>
> > >> 1. NFS
> > >> 2. CEPH
> > >> 3. Clustered Logical Volume Management (CLVM) on top of SAN
> > >> exposed
> > >> storage via iSCSI,FC or FCOE.
> > >>
> > >> It's also possible to build your own storage driver and set a
> > >> LUN to
> > read
> > >> only on a particular host using your SANs API.
> > >>
> > >> Solidfire, Nexenta and Cloudbyte have also added storage drivers
> > >> more
> > >> recently that may provide support for live migration, but as I'm
> > >> not
> > >> personally familiar with these storage platforms, I'll leave it
> > >> up to
> > >> others to comment if they wish.
> > >>
> > >> - Si
> > >>
> > >>
> > >>
> > >>
> > >>
> > >> ________________________________________
> > >> From: Rafael Weingartner <ra...@gmail.com>
> > >> Sent: Tuesday, March 31, 2015 3:36 PM
> > >> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
> > >> Subject: Cloudstack and KVM clusters,
> > >>
> > >> Hi folks,
> > >>
> > >> I was looking a matrix of Cloudstack compatibility matrix at
> > >> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
> > >>
> > >> Slide 25 seemed to show that we cannot have clusters of KVM in
> > >> CS? Is
> > that
> > >> true? Is it possible to live migrate VMs between KVM hosts that
> > >> are not
> > >> clustered in CS?
> > >>
> > >>
> > >> --
> > >> Rafael Weingärtner
> > >>
> > >
> > >
> > >
> > > --
> > > Rafael Weingärtner
> >
Re: Cloudstack and KVM clusters,
Posted by Nux! <nu...@li.nux.ro>.
Yes, Chiu.
--
Sent from the Delta quadrant using Borg technology!
Nux!
www.nux.ro
----- Original Message -----
> From: "chiu ching cheng" <cc...@gmail.com>
> To: users@cloudstack.apache.org
> Cc: dev@cloudstack.apache.org
> Sent: Wednesday, 1 April, 2015 02:31:42
> Subject: Re: Cloudstack and KVM clusters,
> If I wnat to build a kvm native cluster with gfs2 + DLM , and use iscsi +
> DRBD in storage .
>
> Then add the kvm cluster to cloudstack , and add the SharedMountPoint to
> cloudstack as primary storage , Does it work ?
>
> On Wed, Apr 1, 2015 at 6:12 AM, Marcus <sh...@gmail.com> wrote:
>
>> Don't forget SharedMountPoint. This (in theory, haven't tried it
>> recently) allows you to use any clustered filesystem that has a
>> consistent mountpoint across all KVM hosts in a CS cluster, e.g. mount
>> an OCFS2 to /vmstore1 then register /vmstore1 as a SharedMountPoint.
>>
>> The Ceph support is in the form of RBD, by the way. You could use
>> CephFS if you wished via SharedMountPoint.
>>
>> On Tue, Mar 31, 2015 at 2:09 PM, Simon Weller <sw...@ena.com> wrote:
>> > The hosts need to be part of the same Cloudstack cluster, and depending
>> on the underlying storage technology, you may need a clustered file system
>> as well.
>> >
>> > A Cloudstack cluster is basically a group of physical hosts.
>> >
>> > For example:
>> >
>> > You build a new Zone in Cloudstack. Under the zone you have a pod.
>> Within the pod, you build a new cluster (just a group of hosts). Then you
>> assigned 4 servers (hosts) into that cluster. You will be able to live
>> migrate between the 4 hosts assuming the original mentioned criteria are
>> met.
>> >
>> > - Si
>> >
>> > ________________________________________
>> > From: Rafael Weingartner <ra...@gmail.com>
>> > Sent: Tuesday, March 31, 2015 4:02 PM
>> > To: dev@cloudstack.apache.org
>> > Cc: users@cloudstack.apache.org
>> > Subject: Re: Cloudstack and KVM clusters,
>> >
>> > Thanks Simon,
>> >
>> >
>> > I think I got it.
>> >
>> > So, the hosts do not need to be in a cluster to perform the live
>> migration.
>> >
>> > On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com> wrote:
>> >
>> >> Rafael,
>> >>
>> >> KVM live migration really relies on whether the underlying shared
>> storage
>> >> (and file system) supports the ability to provide data consistency
>> during a
>> >> migration. You never ever want a situation where 2 hosts are able to
>> mount
>> >> and write to the same volume concurrently.
>> >>
>> >> You can live migrate in KVM today using the following underlying file
>> >> systems/methods:
>> >>
>> >> 1. NFS
>> >> 2. CEPH
>> >> 3. Clustered Logical Volume Management (CLVM) on top of SAN exposed
>> >> storage via iSCSI,FC or FCOE.
>> >>
>> >> It's also possible to build your own storage driver and set a LUN to
>> read
>> >> only on a particular host using your SANs API.
>> >>
>> >> Solidfire, Nexenta and Cloudbyte have also added storage drivers more
>> >> recently that may provide support for live migration, but as I'm not
>> >> personally familiar with these storage platforms, I'll leave it up to
>> >> others to comment if they wish.
>> >>
>> >> - Si
>> >>
>> >>
>> >>
>> >>
>> >>
>> >> ________________________________________
>> >> From: Rafael Weingartner <ra...@gmail.com>
>> >> Sent: Tuesday, March 31, 2015 3:36 PM
>> >> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
>> >> Subject: Cloudstack and KVM clusters,
>> >>
>> >> Hi folks,
>> >>
>> >> I was looking a matrix of Cloudstack compatibility matrix at
>> >> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
>> >>
>> >> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is
>> that
>> >> true? Is it possible to live migrate VMs between KVM hosts that are not
>> >> clustered in CS?
>> >>
>> >>
>> >> --
>> >> Rafael Weingärtner
>> >>
>> >
>> >
>> >
>> > --
>> > Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by chiu ching cheng <cc...@gmail.com>.
If I wnat to build a kvm native cluster with gfs2 + DLM , and use iscsi +
DRBD in storage .
Then add the kvm cluster to cloudstack , and add the SharedMountPoint to
cloudstack as primary storage , Does it work ?
On Wed, Apr 1, 2015 at 6:12 AM, Marcus <sh...@gmail.com> wrote:
> Don't forget SharedMountPoint. This (in theory, haven't tried it
> recently) allows you to use any clustered filesystem that has a
> consistent mountpoint across all KVM hosts in a CS cluster, e.g. mount
> an OCFS2 to /vmstore1 then register /vmstore1 as a SharedMountPoint.
>
> The Ceph support is in the form of RBD, by the way. You could use
> CephFS if you wished via SharedMountPoint.
>
> On Tue, Mar 31, 2015 at 2:09 PM, Simon Weller <sw...@ena.com> wrote:
> > The hosts need to be part of the same Cloudstack cluster, and depending
> on the underlying storage technology, you may need a clustered file system
> as well.
> >
> > A Cloudstack cluster is basically a group of physical hosts.
> >
> > For example:
> >
> > You build a new Zone in Cloudstack. Under the zone you have a pod.
> Within the pod, you build a new cluster (just a group of hosts). Then you
> assigned 4 servers (hosts) into that cluster. You will be able to live
> migrate between the 4 hosts assuming the original mentioned criteria are
> met.
> >
> > - Si
> >
> > ________________________________________
> > From: Rafael Weingartner <ra...@gmail.com>
> > Sent: Tuesday, March 31, 2015 4:02 PM
> > To: dev@cloudstack.apache.org
> > Cc: users@cloudstack.apache.org
> > Subject: Re: Cloudstack and KVM clusters,
> >
> > Thanks Simon,
> >
> >
> > I think I got it.
> >
> > So, the hosts do not need to be in a cluster to perform the live
> migration.
> >
> > On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com> wrote:
> >
> >> Rafael,
> >>
> >> KVM live migration really relies on whether the underlying shared
> storage
> >> (and file system) supports the ability to provide data consistency
> during a
> >> migration. You never ever want a situation where 2 hosts are able to
> mount
> >> and write to the same volume concurrently.
> >>
> >> You can live migrate in KVM today using the following underlying file
> >> systems/methods:
> >>
> >> 1. NFS
> >> 2. CEPH
> >> 3. Clustered Logical Volume Management (CLVM) on top of SAN exposed
> >> storage via iSCSI,FC or FCOE.
> >>
> >> It's also possible to build your own storage driver and set a LUN to
> read
> >> only on a particular host using your SANs API.
> >>
> >> Solidfire, Nexenta and Cloudbyte have also added storage drivers more
> >> recently that may provide support for live migration, but as I'm not
> >> personally familiar with these storage platforms, I'll leave it up to
> >> others to comment if they wish.
> >>
> >> - Si
> >>
> >>
> >>
> >>
> >>
> >> ________________________________________
> >> From: Rafael Weingartner <ra...@gmail.com>
> >> Sent: Tuesday, March 31, 2015 3:36 PM
> >> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
> >> Subject: Cloudstack and KVM clusters,
> >>
> >> Hi folks,
> >>
> >> I was looking a matrix of Cloudstack compatibility matrix at
> >> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
> >>
> >> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is
> that
> >> true? Is it possible to live migrate VMs between KVM hosts that are not
> >> clustered in CS?
> >>
> >>
> >> --
> >> Rafael Weingärtner
> >>
> >
> >
> >
> > --
> > Rafael Weingärtner
>
Re: Cloudstack and KVM clusters,
Posted by chiu ching cheng <cc...@gmail.com>.
If I wnat to build a kvm native cluster with gfs2 + DLM , and use iscsi +
DRBD in storage .
Then add the kvm cluster to cloudstack , and add the SharedMountPoint to
cloudstack as primary storage , Does it work ?
On Wed, Apr 1, 2015 at 6:12 AM, Marcus <sh...@gmail.com> wrote:
> Don't forget SharedMountPoint. This (in theory, haven't tried it
> recently) allows you to use any clustered filesystem that has a
> consistent mountpoint across all KVM hosts in a CS cluster, e.g. mount
> an OCFS2 to /vmstore1 then register /vmstore1 as a SharedMountPoint.
>
> The Ceph support is in the form of RBD, by the way. You could use
> CephFS if you wished via SharedMountPoint.
>
> On Tue, Mar 31, 2015 at 2:09 PM, Simon Weller <sw...@ena.com> wrote:
> > The hosts need to be part of the same Cloudstack cluster, and depending
> on the underlying storage technology, you may need a clustered file system
> as well.
> >
> > A Cloudstack cluster is basically a group of physical hosts.
> >
> > For example:
> >
> > You build a new Zone in Cloudstack. Under the zone you have a pod.
> Within the pod, you build a new cluster (just a group of hosts). Then you
> assigned 4 servers (hosts) into that cluster. You will be able to live
> migrate between the 4 hosts assuming the original mentioned criteria are
> met.
> >
> > - Si
> >
> > ________________________________________
> > From: Rafael Weingartner <ra...@gmail.com>
> > Sent: Tuesday, March 31, 2015 4:02 PM
> > To: dev@cloudstack.apache.org
> > Cc: users@cloudstack.apache.org
> > Subject: Re: Cloudstack and KVM clusters,
> >
> > Thanks Simon,
> >
> >
> > I think I got it.
> >
> > So, the hosts do not need to be in a cluster to perform the live
> migration.
> >
> > On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com> wrote:
> >
> >> Rafael,
> >>
> >> KVM live migration really relies on whether the underlying shared
> storage
> >> (and file system) supports the ability to provide data consistency
> during a
> >> migration. You never ever want a situation where 2 hosts are able to
> mount
> >> and write to the same volume concurrently.
> >>
> >> You can live migrate in KVM today using the following underlying file
> >> systems/methods:
> >>
> >> 1. NFS
> >> 2. CEPH
> >> 3. Clustered Logical Volume Management (CLVM) on top of SAN exposed
> >> storage via iSCSI,FC or FCOE.
> >>
> >> It's also possible to build your own storage driver and set a LUN to
> read
> >> only on a particular host using your SANs API.
> >>
> >> Solidfire, Nexenta and Cloudbyte have also added storage drivers more
> >> recently that may provide support for live migration, but as I'm not
> >> personally familiar with these storage platforms, I'll leave it up to
> >> others to comment if they wish.
> >>
> >> - Si
> >>
> >>
> >>
> >>
> >>
> >> ________________________________________
> >> From: Rafael Weingartner <ra...@gmail.com>
> >> Sent: Tuesday, March 31, 2015 3:36 PM
> >> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
> >> Subject: Cloudstack and KVM clusters,
> >>
> >> Hi folks,
> >>
> >> I was looking a matrix of Cloudstack compatibility matrix at
> >> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
> >>
> >> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is
> that
> >> true? Is it possible to live migrate VMs between KVM hosts that are not
> >> clustered in CS?
> >>
> >>
> >> --
> >> Rafael Weingärtner
> >>
> >
> >
> >
> > --
> > Rafael Weingärtner
>
Re: Cloudstack and KVM clusters,
Posted by Marcus <sh...@gmail.com>.
Don't forget SharedMountPoint. This (in theory, haven't tried it
recently) allows you to use any clustered filesystem that has a
consistent mountpoint across all KVM hosts in a CS cluster, e.g. mount
an OCFS2 to /vmstore1 then register /vmstore1 as a SharedMountPoint.
The Ceph support is in the form of RBD, by the way. You could use
CephFS if you wished via SharedMountPoint.
On Tue, Mar 31, 2015 at 2:09 PM, Simon Weller <sw...@ena.com> wrote:
> The hosts need to be part of the same Cloudstack cluster, and depending on the underlying storage technology, you may need a clustered file system as well.
>
> A Cloudstack cluster is basically a group of physical hosts.
>
> For example:
>
> You build a new Zone in Cloudstack. Under the zone you have a pod. Within the pod, you build a new cluster (just a group of hosts). Then you assigned 4 servers (hosts) into that cluster. You will be able to live migrate between the 4 hosts assuming the original mentioned criteria are met.
>
> - Si
>
> ________________________________________
> From: Rafael Weingartner <ra...@gmail.com>
> Sent: Tuesday, March 31, 2015 4:02 PM
> To: dev@cloudstack.apache.org
> Cc: users@cloudstack.apache.org
> Subject: Re: Cloudstack and KVM clusters,
>
> Thanks Simon,
>
>
> I think I got it.
>
> So, the hosts do not need to be in a cluster to perform the live migration.
>
> On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com> wrote:
>
>> Rafael,
>>
>> KVM live migration really relies on whether the underlying shared storage
>> (and file system) supports the ability to provide data consistency during a
>> migration. You never ever want a situation where 2 hosts are able to mount
>> and write to the same volume concurrently.
>>
>> You can live migrate in KVM today using the following underlying file
>> systems/methods:
>>
>> 1. NFS
>> 2. CEPH
>> 3. Clustered Logical Volume Management (CLVM) on top of SAN exposed
>> storage via iSCSI,FC or FCOE.
>>
>> It's also possible to build your own storage driver and set a LUN to read
>> only on a particular host using your SANs API.
>>
>> Solidfire, Nexenta and Cloudbyte have also added storage drivers more
>> recently that may provide support for live migration, but as I'm not
>> personally familiar with these storage platforms, I'll leave it up to
>> others to comment if they wish.
>>
>> - Si
>>
>>
>>
>>
>>
>> ________________________________________
>> From: Rafael Weingartner <ra...@gmail.com>
>> Sent: Tuesday, March 31, 2015 3:36 PM
>> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
>> Subject: Cloudstack and KVM clusters,
>>
>> Hi folks,
>>
>> I was looking a matrix of Cloudstack compatibility matrix at
>> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
>>
>> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
>> true? Is it possible to live migrate VMs between KVM hosts that are not
>> clustered in CS?
>>
>>
>> --
>> Rafael Weingärtner
>>
>
>
>
> --
> Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Marcus <sh...@gmail.com>.
Don't forget SharedMountPoint. This (in theory, haven't tried it
recently) allows you to use any clustered filesystem that has a
consistent mountpoint across all KVM hosts in a CS cluster, e.g. mount
an OCFS2 to /vmstore1 then register /vmstore1 as a SharedMountPoint.
The Ceph support is in the form of RBD, by the way. You could use
CephFS if you wished via SharedMountPoint.
On Tue, Mar 31, 2015 at 2:09 PM, Simon Weller <sw...@ena.com> wrote:
> The hosts need to be part of the same Cloudstack cluster, and depending on the underlying storage technology, you may need a clustered file system as well.
>
> A Cloudstack cluster is basically a group of physical hosts.
>
> For example:
>
> You build a new Zone in Cloudstack. Under the zone you have a pod. Within the pod, you build a new cluster (just a group of hosts). Then you assigned 4 servers (hosts) into that cluster. You will be able to live migrate between the 4 hosts assuming the original mentioned criteria are met.
>
> - Si
>
> ________________________________________
> From: Rafael Weingartner <ra...@gmail.com>
> Sent: Tuesday, March 31, 2015 4:02 PM
> To: dev@cloudstack.apache.org
> Cc: users@cloudstack.apache.org
> Subject: Re: Cloudstack and KVM clusters,
>
> Thanks Simon,
>
>
> I think I got it.
>
> So, the hosts do not need to be in a cluster to perform the live migration.
>
> On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com> wrote:
>
>> Rafael,
>>
>> KVM live migration really relies on whether the underlying shared storage
>> (and file system) supports the ability to provide data consistency during a
>> migration. You never ever want a situation where 2 hosts are able to mount
>> and write to the same volume concurrently.
>>
>> You can live migrate in KVM today using the following underlying file
>> systems/methods:
>>
>> 1. NFS
>> 2. CEPH
>> 3. Clustered Logical Volume Management (CLVM) on top of SAN exposed
>> storage via iSCSI,FC or FCOE.
>>
>> It's also possible to build your own storage driver and set a LUN to read
>> only on a particular host using your SANs API.
>>
>> Solidfire, Nexenta and Cloudbyte have also added storage drivers more
>> recently that may provide support for live migration, but as I'm not
>> personally familiar with these storage platforms, I'll leave it up to
>> others to comment if they wish.
>>
>> - Si
>>
>>
>>
>>
>>
>> ________________________________________
>> From: Rafael Weingartner <ra...@gmail.com>
>> Sent: Tuesday, March 31, 2015 3:36 PM
>> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
>> Subject: Cloudstack and KVM clusters,
>>
>> Hi folks,
>>
>> I was looking a matrix of Cloudstack compatibility matrix at
>> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
>>
>> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
>> true? Is it possible to live migrate VMs between KVM hosts that are not
>> clustered in CS?
>>
>>
>> --
>> Rafael Weingärtner
>>
>
>
>
> --
> Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Simon Weller <sw...@ena.com>.
The hosts need to be part of the same Cloudstack cluster, and depending on the underlying storage technology, you may need a clustered file system as well.
A Cloudstack cluster is basically a group of physical hosts.
For example:
You build a new Zone in Cloudstack. Under the zone you have a pod. Within the pod, you build a new cluster (just a group of hosts). Then you assigned 4 servers (hosts) into that cluster. You will be able to live migrate between the 4 hosts assuming the original mentioned criteria are met.
- Si
________________________________________
From: Rafael Weingartner <ra...@gmail.com>
Sent: Tuesday, March 31, 2015 4:02 PM
To: dev@cloudstack.apache.org
Cc: users@cloudstack.apache.org
Subject: Re: Cloudstack and KVM clusters,
Thanks Simon,
I think I got it.
So, the hosts do not need to be in a cluster to perform the live migration.
On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com> wrote:
> Rafael,
>
> KVM live migration really relies on whether the underlying shared storage
> (and file system) supports the ability to provide data consistency during a
> migration. You never ever want a situation where 2 hosts are able to mount
> and write to the same volume concurrently.
>
> You can live migrate in KVM today using the following underlying file
> systems/methods:
>
> 1. NFS
> 2. CEPH
> 3. Clustered Logical Volume Management (CLVM) on top of SAN exposed
> storage via iSCSI,FC or FCOE.
>
> It's also possible to build your own storage driver and set a LUN to read
> only on a particular host using your SANs API.
>
> Solidfire, Nexenta and Cloudbyte have also added storage drivers more
> recently that may provide support for live migration, but as I'm not
> personally familiar with these storage platforms, I'll leave it up to
> others to comment if they wish.
>
> - Si
>
>
>
>
>
> ________________________________________
> From: Rafael Weingartner <ra...@gmail.com>
> Sent: Tuesday, March 31, 2015 3:36 PM
> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
> Subject: Cloudstack and KVM clusters,
>
> Hi folks,
>
> I was looking a matrix of Cloudstack compatibility matrix at
> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
>
> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
> true? Is it possible to live migrate VMs between KVM hosts that are not
> clustered in CS?
>
>
> --
> Rafael Weingärtner
>
--
Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Simon Weller <sw...@ena.com>.
The hosts need to be part of the same Cloudstack cluster, and depending on the underlying storage technology, you may need a clustered file system as well.
A Cloudstack cluster is basically a group of physical hosts.
For example:
You build a new Zone in Cloudstack. Under the zone you have a pod. Within the pod, you build a new cluster (just a group of hosts). Then you assigned 4 servers (hosts) into that cluster. You will be able to live migrate between the 4 hosts assuming the original mentioned criteria are met.
- Si
________________________________________
From: Rafael Weingartner <ra...@gmail.com>
Sent: Tuesday, March 31, 2015 4:02 PM
To: dev@cloudstack.apache.org
Cc: users@cloudstack.apache.org
Subject: Re: Cloudstack and KVM clusters,
Thanks Simon,
I think I got it.
So, the hosts do not need to be in a cluster to perform the live migration.
On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com> wrote:
> Rafael,
>
> KVM live migration really relies on whether the underlying shared storage
> (and file system) supports the ability to provide data consistency during a
> migration. You never ever want a situation where 2 hosts are able to mount
> and write to the same volume concurrently.
>
> You can live migrate in KVM today using the following underlying file
> systems/methods:
>
> 1. NFS
> 2. CEPH
> 3. Clustered Logical Volume Management (CLVM) on top of SAN exposed
> storage via iSCSI,FC or FCOE.
>
> It's also possible to build your own storage driver and set a LUN to read
> only on a particular host using your SANs API.
>
> Solidfire, Nexenta and Cloudbyte have also added storage drivers more
> recently that may provide support for live migration, but as I'm not
> personally familiar with these storage platforms, I'll leave it up to
> others to comment if they wish.
>
> - Si
>
>
>
>
>
> ________________________________________
> From: Rafael Weingartner <ra...@gmail.com>
> Sent: Tuesday, March 31, 2015 3:36 PM
> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
> Subject: Cloudstack and KVM clusters,
>
> Hi folks,
>
> I was looking a matrix of Cloudstack compatibility matrix at
> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
>
> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
> true? Is it possible to live migrate VMs between KVM hosts that are not
> clustered in CS?
>
>
> --
> Rafael Weingärtner
>
--
Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Rafael Weingartner <ra...@gmail.com>.
Thanks Simon,
I think I got it.
So, the hosts do not need to be in a cluster to perform the live migration.
On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com> wrote:
> Rafael,
>
> KVM live migration really relies on whether the underlying shared storage
> (and file system) supports the ability to provide data consistency during a
> migration. You never ever want a situation where 2 hosts are able to mount
> and write to the same volume concurrently.
>
> You can live migrate in KVM today using the following underlying file
> systems/methods:
>
> 1. NFS
> 2. CEPH
> 3. Clustered Logical Volume Management (CLVM) on top of SAN exposed
> storage via iSCSI,FC or FCOE.
>
> It's also possible to build your own storage driver and set a LUN to read
> only on a particular host using your SANs API.
>
> Solidfire, Nexenta and Cloudbyte have also added storage drivers more
> recently that may provide support for live migration, but as I'm not
> personally familiar with these storage platforms, I'll leave it up to
> others to comment if they wish.
>
> - Si
>
>
>
>
>
> ________________________________________
> From: Rafael Weingartner <ra...@gmail.com>
> Sent: Tuesday, March 31, 2015 3:36 PM
> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
> Subject: Cloudstack and KVM clusters,
>
> Hi folks,
>
> I was looking a matrix of Cloudstack compatibility matrix at
> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
>
> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
> true? Is it possible to live migrate VMs between KVM hosts that are not
> clustered in CS?
>
>
> --
> Rafael Weingärtner
>
--
Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Rafael Weingartner <ra...@gmail.com>.
Thanks Simon,
I think I got it.
So, the hosts do not need to be in a cluster to perform the live migration.
On Tue, Mar 31, 2015 at 5:59 PM, Simon Weller <sw...@ena.com> wrote:
> Rafael,
>
> KVM live migration really relies on whether the underlying shared storage
> (and file system) supports the ability to provide data consistency during a
> migration. You never ever want a situation where 2 hosts are able to mount
> and write to the same volume concurrently.
>
> You can live migrate in KVM today using the following underlying file
> systems/methods:
>
> 1. NFS
> 2. CEPH
> 3. Clustered Logical Volume Management (CLVM) on top of SAN exposed
> storage via iSCSI,FC or FCOE.
>
> It's also possible to build your own storage driver and set a LUN to read
> only on a particular host using your SANs API.
>
> Solidfire, Nexenta and Cloudbyte have also added storage drivers more
> recently that may provide support for live migration, but as I'm not
> personally familiar with these storage platforms, I'll leave it up to
> others to comment if they wish.
>
> - Si
>
>
>
>
>
> ________________________________________
> From: Rafael Weingartner <ra...@gmail.com>
> Sent: Tuesday, March 31, 2015 3:36 PM
> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
> Subject: Cloudstack and KVM clusters,
>
> Hi folks,
>
> I was looking a matrix of Cloudstack compatibility matrix at
> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
>
> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
> true? Is it possible to live migrate VMs between KVM hosts that are not
> clustered in CS?
>
>
> --
> Rafael Weingärtner
>
--
Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Remi Bergsma <RB...@schubergphilis.com>.
Hi Rafael,
This is what I really like about KVM: CloudStack makes it a cluster :-) This prevents the “two captains” problem you sometimes see with for example XenServer. We’ve loads of XenServers running and right now we’re also looking into KVM. Have to say I really like it!
Regards,
Remi
On 31 Mar 2015, at 22:59, Simon Weller <sw...@ena.com> wrote:
> Rafael,
>
> KVM live migration really relies on whether the underlying shared storage (and file system) supports the ability to provide data consistency during a migration. You never ever want a situation where 2 hosts are able to mount and write to the same volume concurrently.
>
> You can live migrate in KVM today using the following underlying file systems/methods:
>
> 1. NFS
> 2. CEPH
> 3. Clustered Logical Volume Management (CLVM) on top of SAN exposed storage via iSCSI,FC or FCOE.
>
> It's also possible to build your own storage driver and set a LUN to read only on a particular host using your SANs API.
>
> Solidfire, Nexenta and Cloudbyte have also added storage drivers more recently that may provide support for live migration, but as I'm not personally familiar with these storage platforms, I'll leave it up to others to comment if they wish.
>
> - Si
>
>
>
>
>
> ________________________________________
> From: Rafael Weingartner <ra...@gmail.com>
> Sent: Tuesday, March 31, 2015 3:36 PM
> To: users@cloudstack.apache.org; dev@cloudstack.apache.org
> Subject: Cloudstack and KVM clusters,
>
> Hi folks,
>
> I was looking a matrix of Cloudstack compatibility matrix at
> http://pt.slideshare.net/TimMackey/hypervisor-31754727,
>
> Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
> true? Is it possible to live migrate VMs between KVM hosts that are not
> clustered in CS?
>
>
> --
> Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Simon Weller <sw...@ena.com>.
Rafael,
KVM live migration really relies on whether the underlying shared storage (and file system) supports the ability to provide data consistency during a migration. You never ever want a situation where 2 hosts are able to mount and write to the same volume concurrently.
You can live migrate in KVM today using the following underlying file systems/methods:
1. NFS
2. CEPH
3. Clustered Logical Volume Management (CLVM) on top of SAN exposed storage via iSCSI,FC or FCOE.
It's also possible to build your own storage driver and set a LUN to read only on a particular host using your SANs API.
Solidfire, Nexenta and Cloudbyte have also added storage drivers more recently that may provide support for live migration, but as I'm not personally familiar with these storage platforms, I'll leave it up to others to comment if they wish.
- Si
________________________________________
From: Rafael Weingartner <ra...@gmail.com>
Sent: Tuesday, March 31, 2015 3:36 PM
To: users@cloudstack.apache.org; dev@cloudstack.apache.org
Subject: Cloudstack and KVM clusters,
Hi folks,
I was looking a matrix of Cloudstack compatibility matrix at
http://pt.slideshare.net/TimMackey/hypervisor-31754727,
Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
true? Is it possible to live migrate VMs between KVM hosts that are not
clustered in CS?
--
Rafael Weingärtner
Re: Cloudstack and KVM clusters,
Posted by Simon Weller <sw...@ena.com>.
Rafael,
KVM live migration really relies on whether the underlying shared storage (and file system) supports the ability to provide data consistency during a migration. You never ever want a situation where 2 hosts are able to mount and write to the same volume concurrently.
You can live migrate in KVM today using the following underlying file systems/methods:
1. NFS
2. CEPH
3. Clustered Logical Volume Management (CLVM) on top of SAN exposed storage via iSCSI,FC or FCOE.
It's also possible to build your own storage driver and set a LUN to read only on a particular host using your SANs API.
Solidfire, Nexenta and Cloudbyte have also added storage drivers more recently that may provide support for live migration, but as I'm not personally familiar with these storage platforms, I'll leave it up to others to comment if they wish.
- Si
________________________________________
From: Rafael Weingartner <ra...@gmail.com>
Sent: Tuesday, March 31, 2015 3:36 PM
To: users@cloudstack.apache.org; dev@cloudstack.apache.org
Subject: Cloudstack and KVM clusters,
Hi folks,
I was looking a matrix of Cloudstack compatibility matrix at
http://pt.slideshare.net/TimMackey/hypervisor-31754727,
Slide 25 seemed to show that we cannot have clusters of KVM in CS? Is that
true? Is it possible to live migrate VMs between KVM hosts that are not
clustered in CS?
--
Rafael Weingärtner