as vstart_runner.py is compatible with python3, and so is the tests
under `qa/` directory.
and use `pip` to install teuthology, simpler this way.
Signed-off-by: Kefu Chai <kchai@redhat.com>
This will isolate the network namespace for each mount point with
a private ip address and iptables, etc.
For the kill() stuff it will just do DOWN the veth interface instead
of sending ipmi request for kernel mount and kill the fuse processes
for the fuse mount. This could avoid sending the socket FIN to the
ceph cluster.
Fixes: https://tracker.ceph.com/issues/44044
Signed-off-by: Xiubo Li <xiubli@redhat.com>
