** Description changed:
A discussion and investigation stemming from (LP: #2133724): We might
need to have a closer look at the integration between netplan-
configure.service (as of Netplan v1.2) and cloud-init-network.service,
as changing of interface names ("set-name" netplan config) is not being
applied via udev at boot time.
-
Analysis from
https://bugs.launchpad.net/ubuntu/+source/netplan.io/+bug/2133724/comments/8:
"""
- Interestingly, dropping the
/usr/lib/systemd/system/netplan-configure.service.d/cloud-init.conf override
[1] has the side-effect of being unable to re-name network-interfaces at boot
time ("netplan apply" at runtime still works) in my original reproducer from
the bug descriptiong. E.g. booting a resolute cloud-image, modify interface
name ("set-name") in /etc/netplan/50-cloud-init.yaml and reboot => Boot is
delayed by 2 min (systemd-networkd-wait-online.service timeout) as it's waiting
for the new interface name to come online, while it's not actually renamed. –
Other configuration, such as IP addresses, is still applied at boot time.
+ Interestingly, removing the
/usr/lib/systemd/system/netplan-configure.service.d/cloud-init.conf override
[1] has the side-effect of being unable to re-name network-interfaces at boot
time ("netplan apply" at runtime still works) in my original reproducer from
the bug descriptiong. E.g. booting a resolute cloud-image, modify interface
name ("set-name") in /etc/netplan/50-cloud-init.yaml and reboot => Boot is
delayed by 2 min (systemd-networkd-wait-online.service timeout) as it's waiting
for the new interface name to come online, while it's not actually renamed. –
Other configuration, such as IP addresses, is still applied at boot time.
Using the drop-in config [1] solves the interface re-name during boot,
but breaks other use-cases as explained in comment #7. Interestingly,
the rename-via-udev usecase seems to be broken in cloud-images on
netplan 1.1.2-8ubuntu1 as well, so should likely not be considered a
regression. Still, it might be worthwhile to investigate the link and
proper integration between netplan-configure.service and cloud-init-
network.service.
[1]
[Unit]
- # This drop-in unit can be dropped, once cloud-init grew the
+ # This drop-in unit can be removed, once cloud-init grew the
# "Before=netplan-configure.service" dependency natively.
# LP: #2133724
After=cloud-init-network.service
"""
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https://bugs.launchpad.net/bugs/2136392
Title:
Rename of interfaces broken at boot time (netplan-configure.service vs
cloud-init-network.service)
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