Hello Chengen, or anyone else affected, Accepted systemd into noble-proposed. The package will build now and be available at https://launchpad.net/ubuntu/+source/systemd/255.4-1ubuntu8.7 in a few hours, and then in the -proposed repository.
Please help us by testing this new package. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how to enable and use -proposed. Your feedback will aid us getting this update out to other Ubuntu users. If this package fixes the bug for you, please add a comment to this bug, mentioning the version of the package you tested, what testing has been performed on the package and change the tag from verification-needed- noble to verification-done-noble. If it does not fix the bug for you, please add a comment stating that, and change the tag to verification- failed-noble. In either case, without details of your testing we will not be able to proceed. Further information regarding the verification process can be found at https://wiki.ubuntu.com/QATeam/PerformingSRUVerification . Thank you in advance for helping! N.B. The updated package will be released to -updates after the bug(s) fixed by this package have been verified and the package has been in -proposed for a minimum of 7 days. ** Changed in: systemd (Ubuntu Noble) Status: In Progress => Fix Committed ** Tags added: verification-needed verification-needed-noble ** Changed in: systemd (Ubuntu Oracular) Status: In Progress => Fix Committed ** Tags added: verification-needed-oracular -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/2098183 Title: Preserve IPv6 configurations when `KeepConfiguration=dhcp-on-stop` is set Status in systemd package in Ubuntu: Fix Released Status in systemd source package in Focal: Won't Fix Status in systemd source package in Jammy: Won't Fix Status in systemd source package in Noble: Fix Committed Status in systemd source package in Oracular: Fix Committed Status in systemd source package in Plucky: Fix Released Bug description: [Impact] The IPv6 configuration is being cleared even though `KeepConfiguration` is set to `yes`, causing the iSCSI backend system to hang during shutdown. [Fix] Systemd upstream has addressed this issue. https://github.com/systemd/systemd/pull/34989 [Test Plan] <Verify the functionality of KeepConfiguration in preserving IPv6 configurations> 1. Set up a machine with an iSCSI backend in an IPv6-only environment. 2. Configure the `KeepConfiguration` option for each network device individually using drop-in configuration files (e.g., `/etc/systemd/network/*.network.d/*.conf`) or set the `"critical"` option to `true` in the Netplan configuration. 3. Power off the machine and verify that the system does not hang. <Verify the serialization and deserialization functionality in the systemd-networkd service> 1. Enable debugging for systemd-networkd > mkdir -p /etc/systemd/system/systemd-networkd.service.d/ > vim /etc/systemd/system/systemd-networkd.service.d/10-debug.conf === [Service] Environment=SYSTEMD_LOG_LEVEL=debug === systemctl daemon-reload 2. Restart the systemd-networkd service twice using the `systemctl restart systemd-networkd` command. 3. Confirm that serialization and deserialization are functioning correctly by checking `/var/log/syslog` 2025-03-13T00:35:01.540134+00:00 oracular systemd-networkd[2998]: Serializing... 2025-03-13T00:35:01.540165+00:00 oracular systemd-networkd[2998]: enp0s9: Serializing DHCPv4 address (configured): 10.0.2.100/24 broadcast 10.0.2.255 (valid forever, preferred forever), flags: permanent, scope: global, label: n/a 2025-03-13T00:35:01.540193+00:00 oracular systemd-networkd[2998]: enp0s9: Serializing DHCPv6 address (configured): 2603:c020:4016:8201:48ee:6b22:d3e4:2e8/128 (valid for 1d 56min 49s, preferred for 23h 56min 49s), flags: no-prefixroute, scope: global 2025-03-13T00:35:01.540218+00:00 oracular systemd-networkd[2998]: Serialization completed. ... 2025-03-13T00:35:01.596591+00:00 oracular systemd-networkd[3029]: Deserializing... 2025-03-13T00:35:01.596612+00:00 oracular systemd-networkd[3029]: enp0s9: Deserialized DHCPv4 address (configured): 10.0.2.100/24 broadcast 10.0.2.255 (valid forever, preferred forever), flags: permanent, scope: global, label: n/a 2025-03-13T00:35:01.596635+00:00 oracular systemd-networkd[3029]: enp0s9: Deserialized DHCPv6 address (configured): 2603:c020:4016:8201:48ee:6b22:d3e4:2e8/128 (valid for 1d 56min 49s, preferred for 23h 56min 49s), flags: no-prefixroute, scope: global 2025-03-13T00:35:01.596662+00:00 oracular systemd-networkd[3029]: Deserialization completed. <Verify that the IP address is removed when KeepConfiguration=no is set> 1. Check the name of the current network configuration file: > ls /run/systemd/network/ 10-netplan-enp0s9.link 10-netplan-enp0s9.network 2. Create a drop-in directory and override the KeepConfiguration setting: > mkdir -p /etc/systemd/network/10-netplan-enp0s9.network.d > vim /etc/systemd/network/10-netplan-enp0s9.network.d/10-netplan-enp0s9.network.conf === [Network] KeepConfiguration=no === 3. Restart the systemd-networkd service to apply the changes: > systemctl restart systemd-networkd 4. Stop the systemd-networkd service and verify the IP address is dropped: > systemctl stop systemd-networkd > ip a [Where problems could occur] The patches introduce network serialization and deserialization behavior, ensuring that DHCPv6 addresses are preserved when `KeepConfiguration=yes` is set. If any regressions occur, error messages may appear when restarting `systemd-networkd`, but they will be ignored. Both IPv4/IPv6 configuration and the IPv6 connection may be affected. 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