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 >
