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networkd-test: add basic tests for systemd-networkd-wait-online --dns

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This commit is contained in:
Nick Rosbrook 2024-10-22 10:00:49 -04:00
parent 0c405df64a
commit b818627789
1 changed files with 128 additions and 0 deletions
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128
test/networkd-test.py
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@ -1086,6 +1086,134 @@ DNS=127.0.0.1
self.show_journal('systemd-timedated.service')
self.fail(f'Timezone: {tz}, expected: Pacific/Honolulu')
def do_test_wait_online_dns(
self,
iface,
global_dns='',
fallback_dns='',
expect_timeout=False
):
self.start_unit('systemd-networkd')
self.start_unit('systemd-resolved')
# Unless given, clear global DNS configuration
conf = '/run/systemd/resolved.conf.d/global-dns.conf'
os.makedirs(os.path.dirname(conf), exist_ok=True)
with open(conf, 'w') as f:
f.write((
'[Resolve]\n'
f'DNS={global_dns}\n'
f'FallbackDNS={fallback_dns}\n'
))
self.addCleanup(os.remove, conf)
subprocess.check_call(
['systemctl', 'reload', 'systemd-resolved']
)
env = os.environ.copy()
env['SYSTEMD_LOG_LEVEL'] = 'debug'
env['SYSTEMD_LOG_TARGET'] = 'console'
r = subprocess.run(
[NETWORKD_WAIT_ONLINE, '--dns', '--interface', iface, '--timeout=10'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
env=env,
)
if expect_timeout:
self.assertNotEqual(
r.returncode,
0,
f'Command succeeded unexpectedly:\n{r.stderr.decode()}'
)
self.assertRegex(
r.stderr.decode(),
rf'{iface}: No link-specific DNS server is accessible',
f'Missing expected log message:\n{r.stderr.decode()}'
)
else:
self.assertEqual(
r.returncode,
0,
f'Command timed out:\n{r.stderr.decode()}'
)
def test_wait_online_dns(self):
''' test systemd-networkd-wait-online with --dns '''
self.write_network(
self.config,
(
'[Match]\n'
f'Name={self.iface}\n'
'[Network]\n'
'DHCP=ipv4\n'
)
)
self.create_iface()
self.do_test_wait_online_dns(self.iface)
def test_wait_online_dns_global(self):
'''
test systemd-networkd-wait-online with --dns, expect pass due to global DNS
'''
# Set UseDNS=no, and allow global DNS to be used.
self.write_network(
self.config,
(
'[Match]\n'
f'Name={self.iface}\n'
'[Network]\n'
'DHCP=ipv4\n'
'[DHCPv4]\n'
'UseDNS=no\n'
)
)
self.create_iface()
self.do_test_wait_online_dns(self.iface, global_dns='192.168.5.1')
def test_wait_online_dns_expect_timeout(self):
''' test systemd-networkd-wait-online with --dns, and expect timeout '''
# Explicitly set DNSDefaultRoute=yes, and require link-specific DNS to be used.
self.write_network(
self.config,
(
'[Match]\n'
f'Name={self.iface}\n'
'[Network]\n'
'DHCP=ipv4\n'
'DNSDefaultRoute=yes\n'
'[DHCPv4]\n'
'UseDNS=no\n'
)
)
self.create_iface()
self.do_test_wait_online_dns(self.iface, expect_timeout=True)
def test_wait_online_dns_expect_timeout_global(self):
'''
test systemd-networkd-wait-online with --dns, and expect timeout
despite global DNS
'''
# Configure Domains=~., and expect timeout despite global DNS servers
# being available.
self.write_network(
self.config,
(
'[Match]\n'
f'Name={self.iface}\n'
'[Network]\n'
'DHCP=ipv4\n'
'Domains=~.\n'
'[DHCPv4]\n'
'UseDNS=no\n'
)
)
self.create_iface()
self.do_test_wait_online_dns(self.iface, expect_timeout=True, global_dns='192.168.5.1')
class MatchClientTest(unittest.TestCase, NetworkdTestingUtilities):
"""Test [Match] sections in .network files.