On Wed, 05 Sep 2012 14:35:16 +0200, Wido den Hollander <wido@xxxxxxxxx> wrote: > On 09/05/2012 11:30 AM, Alexandre DERUMIER wrote: >>>> Proxmox doesn't use libvirt, does it? >> Yes, we don't use libvirt. >> >>>> Any plans to implement the RBD caching? >> >> It's already implemented (cache=writeback), patched qemu-kvm 1.1. (and qemu-kvm 1.2 is coming in the next days) >> >> Tunning of cache size can be done with a /etc/ceph.conf file >> > > That is kind of dangerous imho and for a couple of reasons. > > For configuring the storage you have /etc/pve/storage.cfg where you > can add the RBD pool, configure the monitors and cephx, but for > caching you rely in librbd reading ceph.conf? > > That is hidden from the user, reading /etc/ceph/ceph.conf will go > without your knowledge. I'd opt for passing down all the options to > Qemu and being able to run without a ceph.conf > > I've ran into the same problems with libvirt and CloudStack. I > couldn't figure out why libvirt was still able to connect to a > specific cluster until I found out my ceph.conf was still in place. > > I also thought it is on the roadmap to not read /etc/ceph/ceph.conf > by default with librbd/librados to take away these kind of issues. I don't think we'll want to change the default behavior (qemu reading /etc/ceph/ceph.conf) for backwards compatibility, but I agree that we should avoid relying on it in the future. Josh > And you would also have this weird situation where the ceph.conf > could have a couple of monitor entries and your "storage.cfg", how > will that work out? > > I would try not to rely on the ceph.conf at all and have Proxmox pass > all the configuration options down to Qemu. > > Wido > >> >> >> ----- Mail original ----- >> >> De: "Wido den Hollander" <wido@xxxxxxxxx> >> À: "Alexandre DERUMIER" <aderumier@xxxxxxxxx> >> Cc: ceph-devel@xxxxxxxxxxxxxxx >> Envoyé: Mercredi 5 Septembre 2012 11:11:27 >> Objet: Re: rbd 0.48 storage support for kvm proxmox distribution available >> >> On 09/05/2012 06:31 AM, Alexandre DERUMIER wrote: >>> Hi List, >>> >>> We have added rbd 0.48 support to the proxmox 2.1 kvm distribution >>> http://www.proxmox.com/products/proxmox-ve >>> >>> >>> Proxmox setup: >>> >>> edit the /etc/pve/storage.cfg and add the configuration (gui creation is not available yet) >>> >>> rbd: mycephcluster >>> monhost 192.168.0.1:6789;192.168.0.2:6789;192.168.0.3:6789 >>> pool rbd >>> username admin >>> authsupported cephx;none >>> content images >>> >> >> Proxmox doesn't use libvirt, does it? >> >> Any plans to implement the RBD caching? >> >> Nice work though! >> >> Wido >> >>> >>> then you need to copy the keyring file from ceph to proxmox >>> >>> scp cephserver1:/etc/ceph/client.admin.keyring /etc/pve/priv/ceph/mycephcluster.keyring >>> >>> >>> >>> For now, you can add/delete/resize rbd volumes from gui. >>> Snapshots/cloning will be added soon (when layering will be available) >>> >>> >>> Regards, >>> >>> Alexandre Derumier >>> -- >>> 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 >>> >> -- >> 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 >> > > -- > 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 -- 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
