In the cloudimage it seems to be working as expected, especially
renaming and configuration of network interfaces at (first-)boot. Some
test results:
ubuntu@testimg:~$ sudo netplan status
Online state: online
DNS Addresses: 127.0.0.53 (stub)
DNS Search: .
● 1: lo ethernet UNKNOWN/UP (unmanaged)
MAC Address: 00:00:00:00:00:00
Addresses: 127.0.0.1/8
::1/128
● 2: en2 ethernet UP (networkd: id1)
MAC Address: f0:0d:ca:fe:00:bb (Red Hat, Inc.)
Addresses: 1.2.3.4/24
fec0::f20d:caff:fefe:bb/64 (dynamic, ra)
fe80::f20d:caff:fefe:bb/64 (link)
Routes: 1.2.3.0/24 from 1.2.3.4 (link)
fe80::/64 metric 256
fec0::/64 metric 100 (ra)
default via fe80::2 metric 100 (ra)
● 3: en1 ethernet UP (networkd: id0)
MAC Address: ca:fe:ca:fe:00:aa (Red Hat, Inc.)
Addresses: 10.0.2.15/24 (dynamic, dhcp)
fec0::c8fe:caff:fefe:aa/64 (dynamic, ra)
fe80::c8fe:caff:fefe:aa/64 (link)
DNS Addresses: 10.0.2.3
Routes: default via 10.0.2.2 from 10.0.2.15 metric 100 (dhcp)
10.0.2.0/24 from 10.0.2.15 metric 100 (link)
10.0.2.2 from 10.0.2.15 metric 100 (dhcp, link)
10.0.2.3 from 10.0.2.15 metric 100 (dhcp, link)
fe80::/64 metric 256
fec0::/64 metric 100 (ra)
default via fe80::2 metric 100 (ra)
ubuntu@testimg:~$ systemctl status netplan-configure.service
● netplan-configure.service - Netplan Backend Configuration
Loaded: loaded (/usr/lib/systemd/system/netplan-configure.service;
enabled; preset: enabled)
Active: active (exited) since Tue 2025-12-02 14:17:18 UTC; 9min ago
Invocation: 2727cbecf99f449dad923f1ab2a5d114
Docs: man:netplan(8)
https://netplan.readthedocs.io/en/stable/netplan-yaml/
Process: 744 ExecStart=/usr/libexec/netplan/configure (code=exited,
status=0/SUCCESS)
Process: 760 ExecStartPost=udevadm control --reload (code=exited,
status=0/SUCCESS)
Process: 809 ExecStartPost=udevadm trigger --action=add
--subsystem-match=net (code=exited, status=0/SUCCESS)
Main PID: 744 (code=exited, status=0/SUCCESS)
Mem peak: 1.7M
CPU: 17ms
Dec 02 14:17:18 testimg systemd[1]: Starting netplan-configure.service -
Netplan Backend Configuration...
Dec 02 14:17:18 testimg systemd[1]: Finished netplan-configure.service -
Netplan Backend Configuration.
ubuntu@testimg:~$ systemd-analyze critical-chain
systemd-networkd-wait-online.service
The time when unit became active or started is printed after the "@" character.
The time the unit took to start is printed after the "+" character.
systemd-networkd-wait-online.service +2.025s
└─systemd-networkd.service @2.938s +298ms
└─network-pre.target @2.929s
└─netplan-configure.service @2.559s +368ms
└─cloud-init-network.service @2.390s +141ms
└─cloud-init-local.service @2.100s +286ms
└─cloud-init-main.service @633ms +748ms
└─systemd-remount-fs.service @592ms +34ms
└─systemd-fsck-root.service @431ms +144ms
└─systemd-journald.socket @325ms
└─system.slice @283ms
└─-.slice @283ms
ubuntu@testimg:~$ systemd-analyze blame
2.025s systemd-networkd-wait-online.service
1.109s dev-vda1.device
1.001s snapd.seeded.service
957ms snapd.service
882ms networkd-dispatcher.service
748ms cloud-init-main.service
[...]
** Description changed:
- WIP
+ [Test plan]
+ $ cat > meta.yaml <<EOF
+ instance-id: ubuntu01
+ local-hostname: testimg
+ EOF
+ $ cat > user.yaml <<EOF
+ #cloud-config
+ ssh_pwauth: true
+ password: test
+ chpasswd:
+ expire: false
+ EOF
+ $ cat > netplan.yaml <<EOF
+ network:
+ version: 2
+ ethernets:
+ id0:
+ match:
+ macaddress: "ca:fe:ca:fe:00:aa"
+ dhcp4: true
+ dhcp6: true
+ set-name: "en1"
+ id1:
+ match:
+ macaddress: "f0:0d:ca:fe:00:bb"
+ addresses: ["1.2.3.4/24"]
+ dhcp6: true
+ set-name: "en2"
+ #optional: true
+ EOF
+ $ cloud-localds --network-config=netplan.yaml seed.img user.yaml meta.yaml
+ $ wget
https://cloud-images.ubuntu.com/resolute/current/resolute-server-cloudimg-amd64.img
+ $ qemu-system-x86_64 \
+ -machine accel=kvm,type=q35 \
+ -cpu host \
+ -m 2G \
+ -device virtio-net-pci,netdev=net0,mac=ca:fe:ca:fe:00:aa \
+ -netdev user,id=net0,hostfwd=tcp::2222-:22 \
+ -nic user,model=virtio-net-pci,mac=f0:0d:ca:fe:00:bb \
+ -drive if=virtio,format=qcow2,file=resolute-server-cloudimg-amd64.img \
+ -drive if=virtio,format=raw,file=seed.img #-snapshot
+ # avoid "-snapshot" to preserve changes to the disk-image
+
+
+ # login: ubuntu / test
+ $ ssh -o "StrictHostKeyChecking=no" -o "UserKnownHostsFile=/dev/null" -p 2222
ubuntu@localhost
+ # install new Netplan generator, e.g. from ppa:slyon/sd-1997-generator-split
+ $ sudo apt install netplan-generator
+
+ # Play around with /etc/netplan/50-cloud-init.yaml modifications
+ # calling "netplan apply" and/or doing reboots, potentially staring
+ # over with a fresh cloud-init
+ $ sudo netplan apply
+ $ sudo cloud-init clean --logs
+ $ sudo reboot
+
+ => Make sure settings are correctly applied at runtime ("netplan
+ apply"), boot ("sudo reboot") and first-boot ("sudo cloud-init clean
+ --logs && sudo reboot").
** Description changed:
+ Refactor Netplan's generate binary to be a proper systemd-generator,
according to
https://www.freedesktop.org/software/systemd/man/latest/systemd.generator.html
and "FO165 – Netplan generator architecture".
+ Upstream changes: https://github.com/canonical/netplan/pull/552
+
[Test plan]
$ cat > meta.yaml <<EOF
instance-id: ubuntu01
local-hostname: testimg
EOF
$ cat > user.yaml <<EOF
#cloud-config
ssh_pwauth: true
password: test
chpasswd:
- expire: false
+ expire: false
EOF
$ cat > netplan.yaml <<EOF
network:
- version: 2
- ethernets:
- id0:
- match:
- macaddress: "ca:fe:ca:fe:00:aa"
- dhcp4: true
- dhcp6: true
- set-name: "en1"
- id1:
- match:
- macaddress: "f0:0d:ca:fe:00:bb"
- addresses: ["1.2.3.4/24"]
- dhcp6: true
- set-name: "en2"
- #optional: true
+ version: 2
+ ethernets:
+ id0:
+ match:
+ macaddress: "ca:fe:ca:fe:00:aa"
+ dhcp4: true
+ dhcp6: true
+ set-name: "en1"
+ id1:
+ match:
+ macaddress: "f0:0d:ca:fe:00:bb"
+ addresses: ["1.2.3.4/24"]
+ dhcp6: true
+ set-name: "en2"
+ #optional: true
EOF
$ cloud-localds --network-config=netplan.yaml seed.img user.yaml meta.yaml
$ wget
https://cloud-images.ubuntu.com/resolute/current/resolute-server-cloudimg-amd64.img
$ qemu-system-x86_64 \
- -machine accel=kvm,type=q35 \
- -cpu host \
- -m 2G \
- -device virtio-net-pci,netdev=net0,mac=ca:fe:ca:fe:00:aa \
- -netdev user,id=net0,hostfwd=tcp::2222-:22 \
- -nic user,model=virtio-net-pci,mac=f0:0d:ca:fe:00:bb \
- -drive if=virtio,format=qcow2,file=resolute-server-cloudimg-amd64.img \
- -drive if=virtio,format=raw,file=seed.img #-snapshot
+ -machine accel=kvm,type=q35 \
+ -cpu host \
+ -m 2G \
+ -device virtio-net-pci,netdev=net0,mac=ca:fe:ca:fe:00:aa \
+ -netdev user,id=net0,hostfwd=tcp::2222-:22 \
+ -nic user,model=virtio-net-pci,mac=f0:0d:ca:fe:00:bb \
+ -drive if=virtio,format=qcow2,file=resolute-server-cloudimg-amd64.img \
+ -drive if=virtio,format=raw,file=seed.img #-snapshot
# avoid "-snapshot" to preserve changes to the disk-image
-
# login: ubuntu / test
$ ssh -o "StrictHostKeyChecking=no" -o "UserKnownHostsFile=/dev/null" -p 2222
ubuntu@localhost
# install new Netplan generator, e.g. from ppa:slyon/sd-1997-generator-split
$ sudo apt install netplan-generator
# Play around with /etc/netplan/50-cloud-init.yaml modifications
# calling "netplan apply" and/or doing reboots, potentially staring
# over with a fresh cloud-init
$ sudo netplan apply
$ sudo cloud-init clean --logs
$ sudo reboot
=> Make sure settings are correctly applied at runtime ("netplan
apply"), boot ("sudo reboot") and first-boot ("sudo cloud-init clean
--logs && sudo reboot").
--
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/2133724
Title:
Enable Netplan split generator
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/netplan.io/+bug/2133724/+subscriptions
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