I have modified the perceus scripts so that before xcpufs is run there exist on the nodes the /etc/group and /etc/passwd files. However, even if I run "xcpufs -u" the group/user membership is not set, as you suggest it should be. I am using a statically linked version of xcpufs on the nodes (freshly compiled, not the one that comes with perceus).
How might one go about debugging this? Thanks, Daniel On 11/2/08, Abhishek Kulkarni <[EMAIL PROTECTED]> wrote: > > > > > Sorry, but don't follow. Are you talking about perceus modules? I > > didn't think we wanted standard passwd/group files sent to the nodes, > > which is what perceus normally does. > > > Yes, I was talking about Perceus modules. "groupfile", "passwdfile" are > modules which just copy the group and passwd file (respectively) from the > perceus master to the slaves. > > > I can't even find where xcpu > > stores the information for xgroupset/xuserset! (I guess this shows > > that it is not trivial to get into the xcpu code...). Also, what do > > you mean by the "-u" switch for xcpu? Oh, I just looked at xcpufs.c > > and I see it there - it is not in the man page for xcpufs, though... > > I guess this would do the trick if we simply want all users and groups > > to be authenticated on the nodes at all time. > > > the group and user information is stored by xcpufs in a userpool structure > in-memory. the -u switch is to automatically add all the users and groups > to the pool. it would do the trick only if the users and/or groups you > want to be authenticated against are present on the slave nodes. > > > I would much prefer to > > have the batch queuing systems do this on a job-by-job basis, sort of > > like the node ownership setting that bjs does on bproc clusters, since > > this would prevent people from running interactively on the nodes that > > are owned by someone else. > > > yes, that's the idea. > > > > > > Daniel > > > > On Fri, Oct 31, 2008 at 7:32 PM, Abhishek Kulkarni <[EMAIL PROTECTED]> > > wrote: > >> > >> i believe the xcpu module is activated in the "init" provisionary stage > >> and the groupfile/passwdfile modules get activated in the "ready" stage. > >> so the way to do this would be to make the groupfile and passwd file > >> modules to run before the xcpu module, and start xcpu with the "-u" > >> switch > >> > >> or better yet: with the new -u switch in xuserset and xgroupset you > >> could add all the users from the master node. > >> > >> Thanks, > >> -- Abhishek > >> > >> On Fri, 2008-10-31 at 14:54 -0400, Daniel Gruner wrote: > >>> Hi > >>> > >>> I was wondering if anybody has scripts for a perceus-xcpu installation > >>> that will automatically add groups and users to freshly booted nodes. > >>> It appears to me that all the perceus scripts in > >>> /etc/perceus/nodescripts run on the node itself, and not on the master > >>> node, which is where one needs to execute the xgroupset and xuserset > >>> commands. Any help would be appreciated. > >>> > >>> Thanks, > >>> Daniel > >>> > >>> p.s. Is anybody planning an xcpu get-together for SC08? I think it > >>> would be great... > >> > >> > > > >
