Python Netlink library
Project description
pyroute2
Pyroute2 is a pure Python netlink and Linux network configuration library. It requires only Python stdlib, no 3rd party libraries. Later it can change, but the deps tree will remain as simple, as it is possible.
The library provides several modules:
- Netlink protocol implementations (RTNetlink, TaskStats, etc)
rtnl, network settings — addresses, routes, traffic controls
nl80211 — wireless functions API (work in progress)
nfnetlink — netfilter API: ipset, nftables (work in progress), …
ipq — simplest userspace packet filtering, iptables QUEUE target
taskstats — extended process statistics
Simple netlink socket object, that can be used in poll/select
Network configuration module IPRoute provides API that in some way resembles ip/tc functionality
IPDB is an async transactional database of Linux network settings
rtnetlink sample
More samples you can read in the project documentation.
Low-level IPRoute utility — Linux network configuration. The IPRoute class is a 1-to-1 RTNL mapping. There are no implicit interface lookups and so on.
Some examples:
from socket import AF_INET
from pyroute2 import IPRoute
# get access to the netlink socket
ip = IPRoute()
# print interfaces
print(ip.get_links())
# create VETH pair and move v0p1 to netns 'test'
ip.link_create(ifname='v0p0', peer='v0p1', kind='veth')
idx = ip.link_lookup(ifname='v0p1')[0]
ip.link('set',
index=idx,
net_ns_fd='test')
# bring v0p0 up and add an address
idx = ip.link_lookup(ifname='v0p0')[0]
ip.link('set',
index=idx,
state='up')
ip.addr('add',
index=idx,
address='10.0.0.1',
broadcast='10.0.0.255',
prefixlen=24)
# create a route with metrics
ip.route('add',
dst='172.16.0.0/24',
gateway='10.0.0.10',
metrics={'mtu': 1400,
'hoplimit': 16})
# create MPLS lwtunnel
# $ sudo modprobe mpls_iptunnel
ip.route('add',
dst='172.16.0.0/24',
oif=idx,
encap={'type': 'mpls',
'labels': '200/300'})
# release Netlink socket
ip.close()
High-level transactional interface, IPDB, a network settings DB:
from pyroute2 import IPDB
# local network settings
ip = IPDB()
# create bridge and add ports and addresses
# transaction will be started with `with` statement
# and will be committed at the end of the block
try:
with ip.create(kind='bridge', ifname='rhev') as i:
i.add_port('em1')
i.add_port('em2')
i.add_ip('10.0.0.2/24')
except Exception as e:
print(e)
finally:
ip.release()
The IPDB arch allows to use it transparently with network namespaces:
from pyroute2 import IPDB
from pyroute2 import NetNS
# create IPDB to work in the 'test' ip netns
# pls notice, that IPDB itself will work in the
# main netns
ip = IPDB(nl=NetNS('test'))
# wait until someone will set up ipaddr 127.0.0.1
# in the netns on the loopback device
ip.interfaces.lo.wait_ip('127.0.0.1')
ip.release()
The project contains several modules for different types of netlink messages, not only RTNL.
network namespace samples
Network namespace manipulation:
from pyroute2 import netns
# create netns
netns.create('test')
# list
print(netns.listnetns())
# remove netns
netns.remove('test')
Create veth interfaces pair and move to netns:
from pyroute2 import IPDB
ip = IPDB()
# create interface pair
ip.create(ifname='v0p0', kind='veth', peer='v0p1').commit()
# move peer to netns
with ip.interfaces.v0p1 as veth:
veth.net_ns_fd = 'test'
# don't forget to release before exit
ip.release()
List interfaces in some netns:
from pyroute2 import NetNS
from pprint import pprint
ns = NetNS('test')
pprint(ns.get_links())
ns.close()
More details and samples see in the documentation.
installation
make install or pip install pyroute2
requires
Python >= 2.6
The pyroute2 testing framework requires flake8, coverage, nosetests.
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