Tommi, Thanks, I'm beginning to understand. I think the only piece I'm missing (or rather, that I didn't understand before) is that if I use the options for cluster_network and private_network in [global] then the OSDs and MONs will automatically bind to the IP address/interface that matches that CIDR when they start up? Thereby negating my having to put a specific addr in each [osd.x] or [mon.x] section. Do I understand that correctly? If I do, then your initial suggestion of setting those fields is exactly what I want. - Travis On Thu, Aug 16, 2012 at 4:22 PM, Tommi Virtanen <tv@xxxxxxxxxxx> wrote: > On Thu, Aug 16, 2012 at 1:13 PM, Travis Rhoden <trhoden@xxxxxxxxx> wrote: >> Is there a link to the docs where the config file options for >> public_network, cluster_network, mon host, cluster addr are listed and >> explained? I looked for them, but couldn't find anything. I just come >> across different mailing list entries and blog entries that keep using >> options I've never seen before. I expected to find these options >> here: http://ceph.com/docs/master/config-cluster/ceph-conf/ but no >> luck. > > Yeah those don't seem to be well documented. > > The only doc mentions of the config options are in: > http://ceph.com/docs/master/ops/manage/grow/mon/ > http://ceph.com/docs/master/man/8/ceph-mon/ > http://ceph.com/docs/master/dev/mon-bootstrap/ > >> Looking at a blog post like this: >> http://www.sebastien-han.fr/blog/2012/07/29/tip-ceph-public-slash-private-network-configuration/, >> I become more confused. Obviously I don't understand the relationship >> between OSD and MONs correctly. If I place all my OSDs on a private >> network and the MONs on a public one, how do clients reach the OSDs? >> I didn't think that data was funneled through the MONs. Is that >> incorrect? I thought my OSDs had to be reachable by anyone trying to >> mount/map an RBD, for example. > > That setup is used with multihomed hosts. Two network interfaces, with > often the "cluster" one being significantly faster (replication causes > write amplification). Clients talk to mons and osds via the public > network, osd<->osd traffic is on the cluster network. -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
