mirror of
https://github.com/systemd/systemd-stable.git
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tests: add networkd integration test
This uses temporary configuration in /run and temporary veth devices, and does not write anything on disk or change any system configuration; but it assumes (and checks at the beginning) that networkd is not currently running. This can be run on a normal installation, in QEMU, nspawn, or LXC. As this requires root privileges, this is not integrated into "make check".
This commit is contained in:
Martin Pitt
parent
ff7d5a5c7c
commit
4ddb85b18b
@ -5442,7 +5442,8 @@ endif
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EXTRA_DIST += \
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units/systemd-networkd.service.m4.in \
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units/systemd-networkd-wait-online.service.in
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units/systemd-networkd-wait-online.service.in \
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test/networkd-test.py
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# ------------------------------------------------------------------------------
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if ENABLE_LOGIND
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371
test/networkd-test.py
Executable file
371
test/networkd-test.py
Executable file
@ -0,0 +1,371 @@
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#!/usr/bin/env python3
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#
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# networkd integration test
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# This uses temporary configuration in /run and temporary veth devices, and
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# does not write anything on disk or change any system configuration;
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# but it assumes (and checks at the beginning) that networkd is not currently
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# running.
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# This can be run on a normal installation, in QEMU, nspawn, or LXC.
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# ATTENTION: This uses the *installed* networkd, not the one from the built
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# source tree.
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#
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# (C) 2015 Canonical Ltd.
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# Author: Martin Pitt <martin.pitt@ubuntu.com>
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#
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# systemd is free software; you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation; either version 2.1 of the License, or
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# (at your option) any later version.
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# systemd is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with systemd; If not, see <http://www.gnu.org/licenses/>.
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import os
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import sys
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import time
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import unittest
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import tempfile
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import subprocess
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import shutil
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networkd_active = subprocess.call(['systemctl', 'is-active', '--quiet',
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'systemd-networkd']) == 0
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have_dnsmasq = shutil.which('dnsmasq')
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@unittest.skipIf(networkd_active,
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'networkd is already active')
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class ClientTestBase:
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def setUp(self):
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self.iface = 'test_eth42'
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self.if_router = 'router_eth42'
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self.workdir_obj = tempfile.TemporaryDirectory()
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self.workdir = self.workdir_obj.name
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self.config = '/run/systemd/network/test_eth42.network'
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os.makedirs(os.path.dirname(self.config), exist_ok=True)
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# avoid "Failed to open /dev/tty" errors in containers
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os.environ['SYSTEMD_LOG_TARGET'] = 'journal'
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# determine path to systemd-networkd-wait-online
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for p in ['/usr/lib/systemd/systemd-networkd-wait-online',
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'/lib/systemd/systemd-networkd-wait-online']:
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if os.path.exists(p):
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self.networkd_wait_online = p
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break
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else:
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self.fail('systemd-networkd-wait-online not found')
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# get current journal cursor
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out = subprocess.check_output(['journalctl', '-b', '--quiet',
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'--no-pager', '-n0', '--show-cursor'],
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universal_newlines=True)
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self.assertTrue(out.startswith('-- cursor:'))
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self.journal_cursor = out.split()[-1]
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def tearDown(self):
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self.shutdown_iface()
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if os.path.exists(self.config):
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os.unlink(self.config)
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subprocess.call(['systemctl', 'stop', 'systemd-networkd'])
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def show_journal(self, unit):
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'''Show journal of given unit since start of the test'''
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print('---- %s ----' % unit)
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sys.stdout.flush()
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subprocess.call(['journalctl', '-b', '--no-pager', '--quiet',
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'--cursor', self.journal_cursor, '-u', unit])
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def create_iface(self, ipv6=False):
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'''Create test interface with DHCP server behind it'''
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raise NotImplementedError('must be implemented by a subclass')
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def shutdown_iface(self):
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'''Remove test interface and stop DHCP server'''
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raise NotImplementedError('must be implemented by a subclass')
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def print_server_log(self):
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'''Print DHCP server log for debugging failures'''
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raise NotImplementedError('must be implemented by a subclass')
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def do_test(self, coldplug=True, ipv6=False, extra_opts='',
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online_timeout=10, dhcp_mode='yes'):
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with open(self.config, 'w') as f:
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f.write('''[Match]
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Name=%s
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[Network]
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DHCP=%s
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%s''' % (self.iface, dhcp_mode, extra_opts))
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if coldplug:
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# create interface first, then start networkd
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self.create_iface(ipv6=ipv6)
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subprocess.check_call(['systemctl', 'start', 'systemd-networkd'])
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else:
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# start networkd first, then create interface
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subprocess.check_call(['systemctl', 'start', 'systemd-networkd'])
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self.create_iface(ipv6=ipv6)
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try:
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subprocess.check_call([self.networkd_wait_online, '--interface',
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self.iface, '--timeout=%i' % online_timeout])
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if ipv6:
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# check iface state and IP 6 address; FIXME: we need to wait a bit
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# longer, as the iface is "configured" already with IPv4 *or*
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# IPv6, but we want to wait for both
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for timeout in range(10):
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out = subprocess.check_output(['ip', 'a', 'show', 'dev', self.iface])
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if b'state UP' in out and b'inet6 2600' in out and b'inet 192.168' in out:
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break
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time.sleep(1)
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else:
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self.fail('timed out waiting for IPv6 configuration')
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self.assertRegex(out, b'inet6 2600::.* scope global .*dynamic')
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self.assertRegex(out, b'inet6 fe80::.* scope link')
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else:
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# should have link-local address on IPv6 only
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out = subprocess.check_output(['ip', '-6', 'a', 'show', 'dev', self.iface])
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self.assertRegex(out, b'inet6 fe80::.* scope link')
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self.assertNotIn(b'scope global', out)
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# should have IPv4 address
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out = subprocess.check_output(['ip', '-4', 'a', 'show', 'dev', self.iface])
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self.assertIn(b'state UP', out)
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self.assertRegex(out, b'inet 192.168.5.\d+/.* scope global dynamic')
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# check networkctl state
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out = subprocess.check_output(['networkctl'])
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self.assertRegex(out, ('%s\s+ether\s+routable\s+unmanaged' % self.if_router).encode())
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self.assertRegex(out, ('%s\s+ether\s+routable\s+configured' % self.iface).encode())
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out = subprocess.check_output(['networkctl', 'status', self.iface])
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self.assertRegex(out, b'Type:\s+ether')
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self.assertRegex(out, b'State:\s+routable.*configured')
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self.assertRegex(out, b'Address:\s+192.168.5.\d+')
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if ipv6:
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self.assertRegex(out, b'2600::')
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else:
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self.assertNotIn(b'2600::', out)
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self.assertRegex(out, b'fe80::')
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self.assertRegex(out, b'Gateway:\s+192.168.5.1')
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self.assertRegex(out, b'DNS:\s+192.168.5.1')
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except (AssertionError, subprocess.CalledProcessError):
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# show networkd status, journal, and DHCP server log on failure
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with open(self.config) as f:
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print('\n---- %s ----\n%s' % (self.config, f.read()))
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print('---- interface status ----')
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sys.stdout.flush()
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subprocess.call(['ip', 'a', 'show', 'dev', self.iface])
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print('---- networkctl status %s ----' % self.iface)
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sys.stdout.flush()
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subprocess.call(['networkctl', 'status', self.iface])
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self.show_journal('systemd-networkd.service')
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self.print_server_log()
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raise
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# verify resolv.conf if it gets dynamically managed
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if os.path.islink('/etc/resolv.conf'):
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for timeout in range(50):
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with open('/etc/resolv.conf') as f:
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contents = f.read()
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if 'nameserver 192.168.5.1\n' in contents:
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break
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# resolv.conf can have at most three nameservers; if we already
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# have three different ones, that's also okay
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if contents.count('nameserver ') >= 3:
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break
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time.sleep(0.1)
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else:
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self.fail('nameserver 192.168.5.1 not found in /etc/resolv.conf')
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if not coldplug:
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# check post-down.d hook
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self.shutdown_iface()
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def test_coldplug_dhcp_yes_ip4(self):
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# we have a 12s timeout on RA, so we need to wait longer
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self.do_test(coldplug=True, ipv6=False, online_timeout=15)
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def test_coldplug_dhcp_yes_ip4_no_ra(self):
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# with disabling RA explicitly things should be fast
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self.do_test(coldplug=True, ipv6=False,
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extra_opts='IPv6AcceptRouterAdvertisements=False')
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def test_coldplug_dhcp_ip4_only(self):
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# we have a 12s timeout on RA, so we need to wait longer
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self.do_test(coldplug=True, ipv6=False, dhcp_mode='ipv4',
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online_timeout=15)
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def test_coldplug_dhcp_ip4_only_no_ra(self):
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# with disabling RA explicitly things should be fast
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self.do_test(coldplug=True, ipv6=False, dhcp_mode='ipv4',
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extra_opts='IPv6AcceptRouterAdvertisements=False')
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def test_coldplug_dhcp_ip6(self):
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self.do_test(coldplug=True, ipv6=True)
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def test_hotplug_dhcp_ip4(self):
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# With IPv4 only we have a 12s timeout on RA, so we need to wait longer
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self.do_test(coldplug=False, ipv6=False, online_timeout=15)
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def test_hotplug_dhcp_ip6(self):
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self.do_test(coldplug=False, ipv6=True)
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@unittest.skipUnless(have_dnsmasq, 'dnsmasq not installed')
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class DnsmasqClientTest(ClientTestBase, unittest.TestCase):
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'''Test networkd client against dnsmasq'''
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def setUp(self):
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super().setUp()
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self.dnsmasq = None
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def create_iface(self, ipv6=False):
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'''Create test interface with DHCP server behind it'''
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# add veth pair
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subprocess.check_call(['ip', 'link', 'add', 'name', self.iface, 'type',
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'veth', 'peer', 'name', self.if_router])
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# give our router an IP
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subprocess.check_call(['ip', 'a', 'flush', 'dev', self.if_router])
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subprocess.check_call(['ip', 'a', 'add', '192.168.5.1/24', 'dev', self.if_router])
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if ipv6:
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subprocess.check_call(['ip', 'a', 'add', '2600::1/64', 'dev', self.if_router])
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subprocess.check_call(['ip', 'link', 'set', self.if_router, 'up'])
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# add DHCP server
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self.dnsmasq_log = os.path.join(self.workdir, 'dnsmasq.log')
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lease_file = os.path.join(self.workdir, 'dnsmasq.leases')
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if ipv6:
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extra_opts = ['--enable-ra', '--dhcp-range=2600::10,2600::20']
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else:
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extra_opts = []
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self.dnsmasq = subprocess.Popen(
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['dnsmasq', '--keep-in-foreground', '--log-queries',
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'--log-facility=' + self.dnsmasq_log, '--conf-file=/dev/null',
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'--dhcp-leasefile=' + lease_file, '--bind-interfaces',
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'--interface=' + self.if_router, '--except-interface=lo',
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'--dhcp-range=192.168.5.10,192.168.5.200'] + extra_opts)
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def shutdown_iface(self):
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'''Remove test interface and stop DHCP server'''
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if self.if_router:
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subprocess.check_call(['ip', 'link', 'del', 'dev', self.if_router])
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self.if_router = None
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if self.dnsmasq:
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self.dnsmasq.kill()
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self.dnsmasq.wait()
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self.dnsmasq = None
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def print_server_log(self):
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'''Print DHCP server log for debugging failures'''
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with open(self.dnsmasq_log) as f:
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sys.stdout.write('\n\n---- dnsmasq log ----\n%s\n------\n\n' % f.read())
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class NetworkdClientTest(ClientTestBase, unittest.TestCase):
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'''Test networkd client against networkd server'''
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def setUp(self):
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super().setUp()
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self.dnsmasq = None
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def create_iface(self, ipv6=False):
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'''Create test interface with DHCP server behind it'''
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# run "router-side" networkd in own mount namespace to shield it from
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# "client-side" configuration and networkd
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(fd, script) = tempfile.mkstemp(prefix='networkd-router.sh')
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self.addCleanup(os.remove, script)
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with os.fdopen(fd, 'w+') as f:
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f.write('''#!/bin/sh -eu
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mkdir -p /run/systemd/network
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mkdir -p /run/systemd/netif
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mount -t tmpfs none /run/systemd/network
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mount -t tmpfs none /run/systemd/netif
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[ ! -e /run/dbus ] || mount -t tmpfs none /run/dbus
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# create router/client veth pair
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cat << EOF > /run/systemd/network/test.netdev
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[NetDev]
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Name=%(ifr)s
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Kind=veth
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[Peer]
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Name=%(ifc)s
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EOF
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cat << EOF > /run/systemd/network/test.network
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[Match]
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Name=%(ifr)s
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[Network]
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Address=192.168.5.1/24
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%(addr6)s
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DHCPServer=yes
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[DHCPServer]
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PoolOffset=10
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PoolSize=50
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DNS=192.168.5.1
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EOF
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# run networkd as in systemd-networkd.service
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exec $(systemctl cat systemd-networkd.service | sed -n '/^ExecStart=/ { s/^.*=//; p}')
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''' % {'ifr': self.if_router, 'ifc': self.iface, 'addr6': ipv6 and 'Address=2600::1/64' or ''})
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os.fchmod(fd, 0o755)
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subprocess.check_call(['systemd-run', '--unit=networkd-test-router.service',
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'-p', 'InaccessibleDirectories=-/etc/systemd/network',
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'-p', 'InaccessibleDirectories=-/run/systemd/network',
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'-p', 'InaccessibleDirectories=-/run/systemd/netif',
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'--service-type=notify', script])
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# wait until devices got created
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for timeout in range(50):
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out = subprocess.check_output(['ip', 'a', 'show', 'dev', self.if_router])
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if b'state UP' in out and b'scope global' in out:
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break
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time.sleep(0.1)
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def shutdown_iface(self):
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'''Remove test interface and stop DHCP server'''
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if self.if_router:
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subprocess.check_call(['systemctl', 'stop', 'networkd-test-router.service'])
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# ensure failed transient unit does not stay around
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subprocess.call(['systemctl', 'reset-failed', 'networkd-test-router.service'])
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subprocess.call(['ip', 'link', 'del', 'dev', self.if_router])
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self.if_router = None
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def print_server_log(self):
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'''Print DHCP server log for debugging failures'''
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self.show_journal('networkd-test-router.service')
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@unittest.skip('networkd does not have DHCPv6 server support')
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def test_hotplug_dhcp_ip6(self):
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pass
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@unittest.skip('networkd does not have DHCPv6 server support')
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def test_coldplug_dhcp_ip6(self):
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pass
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if __name__ == '__main__':
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unittest.main(testRunner=unittest.TextTestRunner(stream=sys.stdout,
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verbosity=2))
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