TEST-85-NETWORK-NetworkdDHCPServerRelayAgentTests is flaky in Github Actions

[DaanDeMeyer]

systemd version the issue has been seen with

main

Used distribution

No response

Linux kernel version used

No response

CPU architectures issue was seen on

None

Component

No response

Expected behaviour you didn't see

No response

Unexpected behaviour you saw

https://github.com/systemd/systemd/actions/runs/9122930502/job/25084529829?pr=32882

gh run download 9122930502 --name ci-mkosi-9122930502-1-centos-9-failed-test-journals -D ci/ci-mkosi-9122930502-1-centos-9-failed-test-journals && journalctl --file ci/ci-mkosi-9122930502-1-centos-9-failed-test-journals/test/journal/TEST-85-NETWORK-NetworkdDHCPServerRelayAgentTests.journal --no-hostname -o short-monotonic -u TEST-85-NETWORK.service -p info

Steps to reproduce the problem

No response

Additional program output to the terminal or log subsystem illustrating the issue

[   48.133539] systemd-networkd-tests.py[540]:             DHCPv4 Client ID: IAID:0x7ec6b6c/DUID
[   48.139623] systemd-networkd-tests.py[540]:           DHCPv6 Client DUID: DUID-EN/Vendor:0000ab11617740de1342c3a2
[   48.143726] systemd-networkd-tests.py[540]: Found link lo(1)
[   48.145874] systemd-networkd-tests.py[540]: Found link gre0(5)
[   48.147627] systemd-networkd-tests.py[540]: Found link gretap0(6)
[   48.149336] systemd-networkd-tests.py[540]: Found link erspan0(7)
[   48.150906] systemd-networkd-tests.py[540]: Found link bridge-relay(17)
[   48.152619] systemd-networkd-tests.py[540]: Found link client-peer(18)
[   48.154372] systemd-networkd-tests.py[540]: Found link client(19)
[   48.155971] systemd-networkd-tests.py[540]: client-peer: link is being processed by networkd: setup state is configuring.
[   48.158560] systemd-networkd-tests.py[540]: client-peer: Operational state 'no-carrier' is not in range ['enslaved':'routable']
[   48.161702] systemd-networkd-tests.py[540]: client-peer: Operational state 'no-carrier' is not in range ['enslaved':'routable']
[   48.165175] systemd-networkd-tests.py[540]: client-peer: Operational state 'no-carrier' is not in range ['enslaved':'routable']
[   48.168748] systemd-networkd-tests.py[540]: client-peer: Operational state 'no-carrier' is not in range ['enslaved':'routable']
[   48.171570] systemd-networkd-tests.py[540]: client-peer: Operational state 'no-carrier' is not in range ['enslaved':'routable']
[   48.174375] systemd-networkd-tests.py[540]: client-peer: Operational state 'no-carrier' is not in range ['enslaved':'routable']
[   48.177169] systemd-networkd-tests.py[540]: client-peer: Operational state 'no-carrier' is not in range ['enslaved':'routable']
[   48.180044] systemd-networkd-tests.py[540]: client-peer: Operational state 'no-carrier' is not in range ['enslaved':'routable']
[   48.182843] systemd-networkd-tests.py[540]: client-peer: Operational state 'no-carrier' is not in range ['enslaved':'routable']
[   48.185629] systemd-networkd-tests.py[540]: client-peer: Operational state 'no-carrier' is not in range ['enslaved':'routable']
[   48.188402] systemd-networkd-tests.py[540]: client-peer: Operational state 'no-carrier' is not in range ['enslaved':'routable']
[   48.191964] systemd-networkd-tests.py[540]: client-peer: link is configured by networkd and online.
[   48.194577] systemd-networkd-tests.py[540]: bridge-relay: link is being processed by networkd: setup state is configuring.
[   48.197727] systemd-networkd-tests.py[540]: client-peer: link is configured by networkd and online.
[   48.201754] systemd-networkd-tests.py[540]: bridge-relay: link is being processed by networkd: setup state is failed.
[   48.205308] systemd-networkd-tests.py[540]: client-peer: link is configured by networkd and online.
[   48.208395] systemd-networkd-tests.py[540]: bridge-relay: link is being processed by networkd: setup state is failed.
[   48.211879] systemd-networkd-tests.py[540]: client-peer: link is configured by networkd and online.
[   48.214669] systemd-networkd-tests.py[540]: bridge-relay: link is being processed by networkd: setup state is failed.
[   48.217645] systemd-networkd-tests.py[540]: Timeout occurred while waiting for network connectivity.
[   48.227366] systemd-networkd-tests.py[540]: ● 17: bridge-relay
[   48.233485] systemd-networkd-tests.py[540]:                    Link File: /usr/lib/systemd/network/98-default-mac-none.link
[   48.243463] systemd-networkd-tests.py[540]:                 Network File: /run/systemd/network/25-agent-bridge.network
[   48.246586] systemd-networkd-tests.py[540]:                        State: carrier (failed)
[   48.248965] systemd-networkd-tests.py[540]:                 Online state: online
[   48.251159] systemd-networkd-tests.py[540]:                         Type: bridge
[   48.253394] systemd-networkd-tests.py[540]:                         Kind: bridge
[   48.255635] systemd-networkd-tests.py[540]:                       Driver: bridge
[   48.258008] systemd-networkd-tests.py[540]:             Hardware Address: 8a:fb:2d:94:e2:db
[   48.260476] systemd-networkd-tests.py[540]:                          MTU: 1500 (min: 68, max: 65535)
[   48.263070] systemd-networkd-tests.py[540]:                        QDisc: noqueue
[   48.265431] systemd-networkd-tests.py[540]: IPv6 Address Generation Mode: eui64
[   48.267766] systemd-networkd-tests.py[540]:                Forward Delay: 15s
[   48.269884] systemd-networkd-tests.py[540]:                   Hello Time: 2s
[   48.271975] systemd-networkd-tests.py[540]:                      Max Age: 20s
[   48.274246] systemd-networkd-tests.py[540]:                  Ageing Time: 5min
[   48.276438] systemd-networkd-tests.py[540]:                     Priority: 32768
[   48.278582] systemd-networkd-tests.py[540]:                          STP: no
[   48.280831] systemd-networkd-tests.py[540]:       Multicast IGMP Version: 2
[   48.282877] systemd-networkd-tests.py[540]:                         Cost: 2000
[   48.285137] systemd-networkd-tests.py[540]:                   Port State: disabled
[   48.287577] systemd-networkd-tests.py[540]:     Number of Queues (Tx/Rx): 1/1
[   48.289701] systemd-networkd-tests.py[540]:             Auto negotiation: no
[   48.291833] systemd-networkd-tests.py[540]:                        Speed: 10Gbps
[   48.294005] systemd-networkd-tests.py[540]:                      Address: fe80::88fb:2dff:fe94:e2db
[   48.296862] systemd-networkd-tests.py[540]:            Activation Policy: up
[   48.299165] systemd-networkd-tests.py[540]:          Required For Online: yes
[   48.433492] systemd-networkd-tests.py[540]: ERROR
[   50.295901] systemd-networkd-tests.py[540]: ======================================================================
[   50.303401] systemd-networkd-tests.py[540]: ERROR: test_relay_agent_on_bridge (__main__.NetworkdDHCPServerRelayAgentTests)
[   50.313596] systemd-networkd-tests.py[540]: ----------------------------------------------------------------------
[   50.322750] systemd-networkd-tests.py[540]: Traceback (most recent call last):
[   50.327588] systemd-networkd-tests.py[540]:   File "/usr/lib/systemd/tests/testdata/test-network/systemd-networkd-tests.py", line 6041, in test_relay_agent_on_bridge
[   50.336938] systemd-networkd-tests.py[540]:     self.wait_online('bridge-relay:routable', 'client-peer:enslaved')
[   50.344651] systemd-networkd-tests.py[540]:   File "/usr/lib/systemd/tests/testdata/test-network/systemd-networkd-tests.py", line 1103, in wait_online
[   50.351252] systemd-networkd-tests.py[540]:     check_output(*args, env=wait_online_env)
[   50.353849] systemd-networkd-tests.py[540]:   File "/usr/lib/systemd/tests/testdata/test-network/systemd-networkd-tests.py", line 126, in check_output
[   50.357731] systemd-networkd-tests.py[540]:     ret.check_returncode()
[   50.359772] systemd-networkd-tests.py[540]:   File "/usr/lib64/python3.9/subprocess.py", line 460, in check_returncode
[   50.362413] systemd-networkd-tests.py[540]:     raise CalledProcessError(self.returncode, self.args, self.stdout,
[   50.365271] systemd-networkd-tests.py[540]: subprocess.CalledProcessError: Command '['/usr/lib/systemd/systemd-networkd-wait-online', '--timeout=20s', '--interface=bridge-relay:routable', '--interface=client-peer:enslaved', '--ignore=gre0', '--ignore=gretap0', '--ignore=sit0', '--ignore=tunl0', '--ignore=ip_vti0', '--ignore=ifb1', '--ignore=ip6gre0', '--ignore=erspan0', '--ignore=lo', '--ignore=ifb0', '--ignore=ip6tnl0', '--ignore=ip6_vti0']' returned non-zero exit status 1.
[   50.376792] systemd-networkd-tests.py[540]: ----------------------------------------------------------------------
[   50.379788] systemd-networkd-tests.py[540]: Ran 2 tests in 34.251s
[   50.381749] systemd-networkd-tests.py[540]: FAILED (errors=1)
[   50.384175] systemd-networkd-tests.py[540]: ● 18: client-peer
[   50.386188] systemd-networkd-tests.py[540]:                    Link File: /usr/lib/systemd/network/99-default.link
[   50.390456] systemd-networkd-tests.py[540]:                 Network File: /run/systemd/network/25-agent-bridge-port.network
[   50.393692] systemd-networkd-tests.py[540]:                        State: enslaved (configured)
[   50.398918] systemd-networkd-tests.py[540]:                 Online state: online
[   50.411336] systemd-networkd-tests.py[540]:                         Type: ether
[   50.414141] systemd-networkd-tests.py[540]:                         Kind: veth
[   50.418016] systemd-networkd-tests.py[540]:                       Driver: veth
[   50.420253] systemd-networkd-tests.py[540]:             Hardware Address: 12:34:56:78:9a:bd
[   50.422762] systemd-networkd-tests.py[540]:                          MTU: 1500 (min: 68, max: 65535)
[   50.425395] systemd-networkd-tests.py[540]:                        QDisc: noqueue
[   50.427709] systemd-networkd-tests.py[540]:                       Master: bridge-relay
[   50.430501] systemd-networkd-tests.py[540]: IPv6 Address Generation Mode: none
[   50.432748] systemd-networkd-tests.py[540]:     Number of Queues (Tx/Rx): 2/2
[   50.435508] systemd-networkd-tests.py[540]:             Auto negotiation: no
[   50.437758] systemd-networkd-tests.py[540]:                        Speed: 10Gbps
[   50.440430] systemd-networkd-tests.py[540]:                       Duplex: full
[   50.442498] systemd-networkd-tests.py[540]:                         Port: tp
[   50.444619] systemd-networkd-tests.py[540]:            Activation Policy: up
[   50.447728] systemd-networkd-tests.py[540]:          Required For Online: yes
[   51.613860] reboot: Power down