network is only configured on first boot

[Marc Siegrist]

When I create a new VM with an Ubuntu Server Cloud image and using cloud-init, the network is only configured on the first boot. After the machine has been shut-down and powered up again, the network is no longer configured static and instead uses DHCP.

I’m using the, at the time newest, xenial server cloud image (30.08.2017) and use a VM manager called oVirt that uses KVM for virtualization.

cloud-init version 0.7.9
Ubuntu 16.04.3 LTS

Steps to reproduce:

• Download Ubuntu cloud image from https://cloud-images.ubuntu.com/xenial/
• Mount disk to fix bug #1573095 (https://bugs.launchpad.net/cloud-images/+bug/1573095)
• Fix bug with instructions from comment https://bugs.launchpad.net/cloud-
        images/+bug/1573095/comments/15
• Unmount disk image.
• Import Image into oVirt.
• Create new virtual machine in oVirt.
• Assign disk image to virtual machine.
• Add cloud init parameters (including static IP conf.) to virtual machine.
• Boot virtual machine.
• See that networking works and a static IP is configured (ifconfig).
• See that the network is configured in /etc/network/interfaces.d/50-cloud-init.cfg
• Shutdown (NOT reboot) the virtual machine.
• Power On the virtual machine.
• See that DHCP service runs for 5min.
• After boot see that network is not configured.
• See that file /etc/network/interfaces.d/50-cloud-init.cfg lost its configuration.

Other possible causes:
• The cloud image might be wrongly configured to run cloud-init at every boot (As reboots
        are not affected and the server listens for cloud-init configuration data after first
        boot. Also the ssh hostkey is reset every time the machine boots).

My current workaround:
• I added the following line to my cloud-init runcmd parameters to copy the cloud network
        file:
        - "cp /etc/network/interfaces.d/50-cloud-init.cfg /etc/network/interfaces"
• I disable cloud-init manually after first boot by adding the following line to my cloud-
        init runcmd parameters:
        - [ touch, "/etc/cloud/cloud-init.disabled" ]

[Dan Watkins (oddbloke)]

Hi Marc,

Thanks for filing this bug! Is this still an issue you are seeing in more recent versions of cloud-init? If it is, please do give us steps to reproduce and set this bug back to New.

Thanks!

Dan

[Launchpad Janitor (janitor)]

[Expired for cloud-init because there has been no activity for 60 days.]

[James Falcon (falcojr)]

Tracked in Github Issues as https://github.com/canonical/cloud-init/issues/2992