Yes, Chiu. -- Sent from the Delta quadrant using Borg technology!
Nux! www.nux.ro ----- Original Message ----- > From: "chiu ching cheng" <ccchiou...@gmail.com> > To: us...@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 <shadow...@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 <swel...@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 <rafaelweingart...@gmail.com> >> > Sent: Tuesday, March 31, 2015 4:02 PM >> > To: dev@cloudstack.apache.org >> > Cc: us...@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 <swel...@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 <rafaelweingart...@gmail.com> >> >> Sent: Tuesday, March 31, 2015 3:36 PM >> >> To: us...@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
