** Description changed:
- Starting in oracular, systemd-networkd network interface configuration
- remain stuck in "pending" state in buildd images used by snapcraft and
- other *craft tools. Snapcraft adds its own network configuration file to
- /etc/systemd/network before starting the container, and expects the
- network to be configured as part of the system initialization.
+ [ Impact ]
- # cat /etc/systemd/network/10-eth0.network
+ * buildd hooks create minimal images used by launchpad and craft tools.
+ Snapcraft relies on LXD images to create its build environment.
+ Launching LXD buildd images with an injected network configuration
+ will fail to configure the NIC in the absence of udev. The NIC will
+ stay as "pending" according to networkctl.
+
+ * bootable buildd images (for VMs) already include udev and are
+ unaffected.
+
+ [ Test Plan ]
+
+ * get an image or build one with: --project ubuntu-base --subproject buildd
+ wget -O image.tar.gz
https://cloud-images.ubuntu.com/buildd/daily/oracular/current/oracular-server-cloudimg-amd64-lxd_combined.tar.gz
+ img=$(sha256sum image.tar.gz | awk '{print $1}')
+ lxc image import image.tar.gz
+
+ * create a test instance with basic dhcp network:
+ lxc init $img testbuildd
+ lxc file push --uid 0 --gid 0 --mode 0644 -
testbuildd/etc/systemd/network/lxd.network <<EOF
[Match]
Name=eth0
+ [Network]
+ DHCP=yes
+ EOF
+ lxc start testbuildd
+ lxc exec testbuildd networkctl
- [Network]
- DHCP=ipv4
- LinkLocalAddressing=ipv6
+ * The eth0 network should show as configured
- [DHCP]
- RouteMetric=100
- UseMTU=true
+ [ Where problems could occur ]
- # networkctl
- IDX LINK TYPE OPERATIONAL SETUP
- 1 lo loopback carrier pending
- 450 eth0 ether routable pending
+ * Although udev is a standard package which is already exercised
+ in bootable buildd images, there is a possibility that issues might
+ surface when LP ingests and modifies this updated LXD image.
+ * Specialized build environments relying on the non-VM buildd image
+ (other than snapcraft and Launchpad) might be affected by the newly
+ exercised udev rules.
- If the udev package and dependencies are present in the buildd image, network
configuration completes as expected:
+ [ Other Info ]
- # networkctl
- IDX LINK TYPE OPERATIONAL SETUP
- 1 lo loopback carrier unmanaged
- 456 eth0 ether routable configured
+ * Launchpad doesn't directly consume buildd images from
cloud-images.ubuntu.com
+ but rather repackages them and validates them in staging.
+ I did check LP devs to give them a heads-up about this change.
+
+ * This change isn't related to the recent launchpad buildd failures with udev
+ and snap installation failures.
** Also affects: livecd-rootfs (Ubuntu)
Importance: Undecided
Status: New
** Also affects: livecd-rootfs (Ubuntu Oracular)
Importance: Undecided
Status: New
** Also affects: livecd-rootfs (Ubuntu Plucky)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2092196
Title:
udev package missing in oracular buildd image
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