My problem was that because ceph is a distributed filesystem (and so it can be used as an alternative to nfs) I supposed I can use as a shared system datastore. Reading your reply I can see it is not true. Probably official documentation should clarify this.
Infact I hoped to use ceph as system datastore because ceph is fault tolerant and nfs is not. Thanks for help, Mario 2013/12/3 Kenneth <[email protected]> > Ceph won't be the default image datastore, but you can always choose it > whenever you create an image. > > You said you don't have an NFS disk and your just use plain disk on your > system datastore so you *should* use ssh in order to have live > migrations. > > Mine uses shared as datastore since I mounted a shared folder on each > nebula node. > --- > > Thanks, > Kenneth > Apollo Global Corp. > > On 12/03/2013 03:01 PM, Mario Giammarco wrote: > > First, thanks you for your very detailed reply! > > > 2013/12/3 Kenneth <[email protected]> > >> You don't need to replace existing datastores, the important is you >> edit the system datastore as "ssh" because you still need to transfer files >> in each node when you deploy a VM. >> > > So I lose live migration, right? > If I understand correctly ceph cannot be default datastore also. > >> Next, you should make sure that all your node are able to communicate >> with the ceph cluster. Issue the command "ceph -s" on all nodes including >> the front end to be sure that they are connected to ceph. >> >> >> > > ... will check... > > >> >> oneadmin@cloud-node1:~$ onedatastore list >> >> ID NAME SIZE AVAIL CLUSTER IMAGES TYPE DS >> TM >> >> 0 system - - - 0 sys - >> shared >> >> 1 default 7.3G 71% - 1 img fs >> shared >> >> 2 files 7.3G 71% - 0 fil fs ssh >> >> * 100 cephds 5.5T 59% - 3 img ceph >> ceph* >> >> Once you add the you have verified that the ceph datastore is active you >> can upload images on the sunstone GUI. Be aware that conversion of images >> to RBD format of ceph may take quite some time. >> > > I see in your configuration that system datastore is shared! > > Thanks again, > Mario > >
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