[Expired for neutron because there has been no activity for 60 days.]
** Changed in: neutron
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1492714
Title:
RFE: Pure Python driven Linux network configuration
Status in neutron:
Expired
Bug description:
[Problem]
Currently, Linux network configuration in Neutron heavily relies on shell
commands, like ip, brctl, ipset, iptables, etc. Shell commands makes Neutron
agents inefficient and really hard to operate in high load environment. In our
production deployment scaling from 50 - 500 physical machines per region, 50+
virtual instances per machine, the Neutron agents run extremely slowly and
sometimes unresponsive.
There is a blueprint that switch openflow operations from shell to
ryu-based pure python library, but it is not sufficient.
[Solution-1]
I'd like to introduce a pure Python netlink library: pyroute2. It supports
network configuration including ip-link, ip-route, ip-netns, tc, ipset and
iptables in the roadmap, and is also compatible with python3. It only requires
standard library which is also awesome, because you don't need to rely on other
unstable third-party libraries that makes dependency hard to maintain.
Moreover, it supports transactional local DB operations for network
configuration called IPDB.
Doc Link: http://docs.pyroute2.org/general.html
Pypi Link: https://pypi.python.org/pypi/pyroute2
I should first issue a rfe for discussion. Forgot it. :-)
Blueprint Link:
https://blueprints.launchpad.net/neutron/+spec/pure-python-linuxnet-conf
[Solution-2]
Currently pyroute2 still doesn't support whole functionality of ipset and
iptables, but they are definitely on the roadmap. I'm not sure its progress.
I've forked this project and will try to involve in if possible to make sure it
evolves as expected. What I suggest is that if possible, should we open a new
project, pyosnetconf or networking-linuxnet-conf, whatever, that implements
OpenStack's own python library for Linux network configuration. It may be much
more aggressive, but still meaningful to neutron.
I'm OK with the two solutions mentioned above. I'd like to get
feedback as much as possible to move forward. Anyway, I strongly
suggest to make it work.
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