Attaching 'serv.py' which mimics behavior of supervisor/http.py in
supervisor for setting up the socket, and then implements an 'echo'
server. client.py is just a simple client to run and show the problem.
One would expect to be able to do this:
$ ./serv.py /tmp/my-socket &
$ ./client.py /tmp/my-socket
Received 'Hello, world'
The behavior seems to differ between precise and saucy kernels.
One thing to note is that on precise kernel and overlayfs, I see:
$ sudo rm -f /tmp/my-socket
$ ./serv.py /tmp/my-socket
Traceback (most recent call last):
File "./serv.py", line 22, in <module>
os.link(tempname, socketname)
OSError: [Errno 1] Operation not permitted
$ sudo rm -f /tmp/my-socket
$ sudo ./serv.py /tmp/my-socket &
$ sudo ./client.py /tmp/my-socket
Received 'Hello, world'
Ie, this works as root, but not as non-root.
** Attachment added: "serv.py: program mimicking supervisor/http.py"
https://bugs.launchpad.net/ubuntu/+source/lxc/+bug/1214500/+attachment/3779836/+files/serv.py
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https://bugs.launchpad.net/bugs/1214500
Title:
consistent failure with overlayfs and unix sockets
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