Quoting Dilvan Moreira ([email protected]): > Hi, > > I am setting up a small cluster using a VM (master) and 3 bare metal > servers (all running Ubuntu 14.04). Each bare metal server also has 2T of > disk space exported using Ceph 0.94.5 > <http://docs.ceph.com/docs/v0.94.5/start/>. > > I would like to be able to run LXD VMs (containers) on this cluster and to > easily migrate these VMs to different nodes. I could have installed > OpenStack, but that seems rather complicated to me (maybe OpenStack is an > overkill for such a small cluster like mine). So, my solution was to create > a big Ceph/rbd block volume and mount it at the LXD container folder ( > /var/lib/lxd/containers) in all nodes. To move a VM, I just shut it down in > one node and then start it again in another. > > For just one VM it's working fine, but it doesn't seem to me as a long term > solution. My questions: > > 1. > > Is there a way to pass a block volume (Ceph/rbd) or folder to a LXD VM,
You can just have your scripts mount the volume/folder to /var/lib/lxd/containers/container/rootfs. You can set lxc.rootfs= in the raw.lxc. Or you can wait for https://github.com/lxc/lxc/pull/670 Once that gets into lxc, I've not thought through whether you'll need any specific support from lxd. I think what you're doing now makes a lot of sense - the only shortcoming is that live migration may be complicated because of the shared rootfs. Note that Guido (cc:d) is also doing a similar setup (using NFS). > so LXD itself would mount the root folder (/)? It would be nice to have > a block volume for each VM (and not all VMs using the same folder). > 2. > > Is there a simpler solution than OpenStack for my use case (or a simpler > installation procedure for OpenStack)? imho juju is the simplest way to install openstack. > 3. > > Ultimately, I would like my cluster to have the ability to schedule VMs > to nodes, move VMs from failed nodes, etc. Any suggestions on how to get > that? The biggest complication I see is that when you ask lxd to move a container, lxd will want to migrate the rootfs. I'm waiting for clarification from Tycho on whether lxd will be smart enough to DTRT. _______________________________________________ lxc-users mailing list [email protected] http://lists.linuxcontainers.org/listinfo/lxc-users
