IPv4 network stays in state "configuring" forever #1368
Description
Our CI tests detected a networkd regression in trunk (still worked in 226): With a standard .network file like
# cat /run/systemd/network/test_eth42.network
[Match]
Name=test_eth42
[Network]
DHCP=yes
the interface now stays in state "configuring" eternally:
# networkctl status test_eth42
● 14: test_eth42
Link File: /lib/systemd/network/99-default.link
Network File: /run/systemd/network/test_eth42.network
Type: ether
State: routable (configuring)
Driver: veth
HW Address: 5e:4b:19:a5:64:72
MTU: 1500
Address: 192.168.5.127
fe80::5c4b:19ff:fea5:6472
Gateway: 192.168.5.1
DNS: 192.168.5.1
The interface is actually fully configured, I'm not quite sure yet what it's still waiting on. Journal output from the point when networkd starts:
Sep 24 10:49:00 debian systemd[1]: Started Network Service.
Sep 24 10:49:00 debian systemd-udevd[4524]: Could not generate persistent MAC address for router_eth42: No such file or directory
Sep 24 10:49:00 debian systemd-udevd[4525]: Could not generate persistent MAC address for test_eth42: No such file or directory
Sep 24 10:49:00 debian kernel: IPv6: ADDRCONF(NETDEV_UP): router_eth42: link is not ready
Sep 24 10:49:00 debian kernel: IPv6: ADDRCONF(NETDEV_CHANGE): router_eth42: link becomes ready
Sep 24 10:49:00 debian systemd-networkd[4522]: test_eth42: Gained carrier
Sep 24 10:49:00 debian systemd-networkd[4522]: router_eth42: Gained carrier
Sep 24 10:49:00 debian systemd-timesyncd[3262]: Synchronized to time server 78.46.76.100:123 (0.debian.pool.ntp.org).
Sep 24 10:49:01 debian systemd-timesyncd[3262]: Network configuration changed, trying to establish connection.
Sep 24 10:49:01 debian systemd-timesyncd[3262]: Synchronized to time server 78.46.76.100:123 (0.debian.pool.ntp.org).
Sep 24 10:49:02 debian systemd-timesyncd[3262]: Network configuration changed, trying to establish connection.
Sep 24 10:49:02 debian systemd-timesyncd[3262]: Synchronized to time server 78.46.76.100:123 (0.debian.pool.ntp.org).
Sep 24 10:49:05 debian systemd-networkd[4522]: test_eth42: DHCPv4 address 192.168.5.127/24 via 192.168.5.1
Sep 24 10:49:05 debian systemd-networkd[4522]: test_eth42: Not connected to system bus, ignoring transient hostname.
Sep 24 10:49:05 debian systemd-timesyncd[3262]: Network configuration changed, trying to establish connection.
Sep 24 10:49:05 debian systemd-timesyncd[3262]: Synchronized to time server 78.46.76.100:123 (0.debian.pool.ntp.org).
I'll run a bisect and further investigations, but want to flag this for the upcoming 227 release.