LTSP booting in 18.04 has broken with the recent netplan update; I think due to this patch.
Involved steps: 1) Clients netboot from the LTSP server with something like nfsroot=xxx. 2) Initramfs-tools sets an IP (usually ipv4). 3) LTSP initramfs hooks create an overlay for the file system to make it writable, and create /etc/network/interfaces with the following contents, to prevent the IP from being removed/changed: auto enp0s3 iface enp0se inet manual 4) Here is the regression, this version of netplan now creates /run/systemd/network/10-netplan-enp0s3.network with these contents: [Match] MACAddress=08:00:27:e9:33:39 Name=enp0s3 [Network] LinkLocalAddressing=ipv6 5) systemd-networkd then sees this configuration and unassigns the interface IP, hanging the clients. I don't know if it was supposed to re-initialize the IP, but it just hangs then. The workaround we currently use is to remove netplan from the initramfs: rm /lib/systemd/system-generators/netplan Could you please tell us of a better way to tell netplan not to assign an IP to the boot interface, or see if it's actually a bug in netplan? ** Tags added: regression -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1763608 Title: Netplan ignores Interfaces without IP Addresses To manage notifications about this bug go to: https://bugs.launchpad.net/netplan/+bug/1763608/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
