Am 01.10.2012 11:05, schrieb Paul Gideon Dann:
On Friday 28 Sep 2012 16:32:09 Bryan Schumaker wrote:
I suspect this is something to do with NFS not supporting the capabilities that setcap is trying to use, but I admit I haven't encountered capabilities before I ran into this issue, so it's just a guess.
Has anyone else seen this problem, or does anyone have an idea how to fix it? NFS doesn't support any capibilities, so I guess the output is to be expected... I'm not sure what to do as a workaround, though. Does the package still install and run even though it printed the warning?
Hmm; yeah. Well the package installs, but ping doesn't work for non-root users. It's not a critical issue, because these are network-booted worker nodes in a cluster, and I doubt ping will be needed directly on the nodes. However, it worries me that other things might be affected at some point if capabilities are increasingly used. I might put in a bug report and see what the devs think.
The lack of capability support on NFS is a shame. In general, we should probably fall back to setuid-root whenever setcap fails and silence this error message. In my opinion, capabilities should be used much more widely and replace setuid-root whereever possible.