We'd kind of need this to work anyway outside of the context of cloud- init-local.
If one sets up netplan rules for a device, and for instance, attempts to set the MTU in networkd .link files, this change would not take effect until the system is rebooted. netplan could trigger --subsystem- match=net; but it's probably best to make sure anything configured in the link is properly (re-)applied when networkd restarts. -- 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/1669564 Title: udevadm trigger subsystem-match=net doesn't always run rules Status in systemd package in Ubuntu: Incomplete Bug description: 1. root@ubuntu:~# lsb_release -rd Description: Ubuntu Zesty Zapus (development branch) Release: 17.04 2. root@ubuntu:~# apt-cache policy udev udev: Installed: 232-18ubuntu1 Candidate: 232-18ubuntu1 Version table: *** 232-18ubuntu1 500 500 http://archive.ubuntu.com/ubuntu zesty/main amd64 Packages 100 /var/lib/dpkg/status 3. udevadm trigger --verbose --subsystem-match=net --action=add will run and read .link files from /run/systemd/network/10-netplan-interface1.link and apply MTU settings 4. during system boot running (3) does not set the MTU; running (3) after boot has completed MTU is set correctly. Here'a log during boot where cloud-init generates a netplan config, invokes `netplan generate` which writes the networkd config out and then udevadm trigger (3). Upon logging in interface1 has an MTU of 1500. Re-running udevadm trigger now runs the rules/link files and updates the MTU. Note that, if you run udevadm test /sys/class/net/interface1; this also will apply the MTU (test probably shouldn't change the interface, I'll file a bug for that as well). # journalctl -o short-precise --no-pager -b | grep WARK Mar 02 19:17:19.839797 ubuntu cloud-init[647]: WARK: ['netplan', '--debug', 'generate']: Mar 02 19:17:19.839797 ubuntu cloud-init[647]: WARK: ['stat', '/run/systemd/network/10-netplan-interface1.link']: Mar 02 19:17:19.839797 ubuntu cloud-init[647]: WARK: ['cat', '/run/systemd/network/10-netplan-interface1.link']: Mar 02 19:17:19.839797 ubuntu cloud-init[647]: WARK: ['systemctl', 'start', '--no-block', 'systemd-udev-trigger.service']: Mar 02 19:17:19.839797 ubuntu cloud-init[647]: WARK: ['udevadm', 'trigger', '--verbose', '--subsystem-match=net', '--action=add']: root@ubuntu:~# cat /run/systemd/network/10-netplan-interface1.link [Match] MACAddress=52:54:00:12:34:02 [Link] Name=interface1 WakeOnLan=off MTUBytes=1492 root@ubuntu:~# ifconfig interface1 interface1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.0.2.100 netmask 255.255.255.0 broadcast 10.0.2.255 inet6 fe80::5054:ff:fe12:3402 prefixlen 64 scopeid 0x20<link> inet6 fec0::5054:ff:fe12:3402 prefixlen 64 scopeid 0x40<site> ether 52:54:00:12:34:02 txqueuelen 1000 (Ethernet) RX packets 16 bytes 5053 (5.0 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 35 bytes 3287 (3.2 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 root@ubuntu:~# udevadm trigger --verbose --subsystem-match=net --action=add /sys/devices/pci0000:00/0000:00:04.0/virtio1/net/interface1 /sys/devices/pci0000:00/0000:00:05.0/virtio2/net/interface2 ys/devices/pci0000:00/0000:00:06.0/virtio3/net/interface0 /sys/devices/virtual/net/lo root@ubuntu:~# ifconfig interface1 interface1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1492 inet 10.0.2.100 netmask 255.255.255.0 broadcast 10.0.2.255 inet6 fe80::5054:ff:fe12:3402 prefixlen 64 scopeid 0x20<link> inet6 fec0::5054:ff:fe12:3402 prefixlen 64 scopeid 0x40<site> ether 52:54:00:12:34:02 txqueuelen 1000 (Ethernet) RX packets 16 bytes 5053 (5.0 KB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 37 bytes 3504 (3.5 KB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 ProblemType: Bug DistroRelease: Ubuntu 17.04 Package: udev 232-18ubuntu1 ProcVersionSignature: Ubuntu 4.10.0-8.10-generic 4.10.0-rc8 Uname: Linux 4.10.0-8-generic x86_64 ApportVersion: 2.20.4-0ubuntu2 Architecture: amd64 Date: Thu Mar 2 19:22:14 2017 Lsusb: Error: command ['lsusb'] failed with exit code 1: MachineType: QEMU Standard PC (i440FX + PIIX, 1996) ProcEnviron: TERM=vt220 PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.10.0-8-generic root=UUID=8bbb84fe-91e8-4a9a-bd91-f6af4793727e ro console=ttyS0 SourcePackage: systemd UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 04/01/2014 dmi.bios.vendor: SeaBIOS dmi.bios.version: 1.10.1-1ubuntu1 dmi.chassis.type: 1 dmi.chassis.vendor: QEMU dmi.chassis.version: pc-i440fx-zesty dmi.modalias: dmi:bvnSeaBIOS:bvr1.10.1-1ubuntu1:bd04/01/2014:svnQEMU:pnStandardPC(i440FX+PIIX,1996):pvrpc-i440fx-zesty:cvnQEMU:ct1:cvrpc-i440fx-zesty: dmi.product.name: Standard PC (i440FX + PIIX, 1996) dmi.product.version: pc-i440fx-zesty dmi.sys.vendor: QEMU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1669564/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
