Am 17.06.2010 11:37, schrieb Daniel Maher:
On 06/17/2010 11:08 AM, Jan wrote:
- enables (diskless) Linux-Clients to boot over the network (debian,
some "real servers", some virtual ones)
Is this possible with glusterfs? Has anybody tried it? I understand it
is not that easy with a FUSE-filesystem, and there does not seem to be a
out-of-the-box solution, but has anybody tried it, maybe building custom
initrds?
That's not what Gluster is for, really. Fundamentally, Gluster is a
networked file system, and while it is highly malleable within that
context, it's not supposed to do anything other than provide a
networked file system.
If you want to do network boots you'll need to look into another
solution to provide that functionality. That said, in theory there's
nothing stopping you from building Gluster into your initialisation
image, then using it once your systems are booted and operational.
I could easily setup netboot the traditional way using NFS, but I would
not have any failover/ha for that. As I understand, NFS on the gluster
storage platform (gsp) does not provide failover in case the first
server crashes. Failover-functionality for some data being on glusterfs
won't help when the root directory is "gone".
glusterfs sounds very promising, it seems to be a great fileserver for a
bunch webservers and other shared/redundant data being used on many
servers, it would make life much easier for me.
I (ideally) try to find a way to have such a shared file area, the
netboot-server and ideally a few iscsi-luns on the same servers.
It is a kind of stupid to have a separate nfs-server just for serving a
total of 1gb of files for some diskless servers to be able too boot
(actually, it would have to be 2 servers again, with failover etc..
doesn't make sense that all diskless servers hang/crash when the nfs
server crashes...). and I only need very few iscsi-luns with a total of
10-15gb, not doing much io.
for NFS-netboot, I think there should be a way to use glusterfs instead.
It's almost the same from the client point of view, the only problem ist
the FUSE-client.
for an iscsi/drbd cluster, it is something totally different. I'm not
sure if it makes sense to put that on the same server. If the gluster
storage platform is a simple, stable solution that works out of the box,
i'd probably prefer that and set up a seperate iscsi-cluster.
Jan
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