Hi all, I was hoping to get some help with figuring out how I can seed a custom ubuntu-server image with some snaps such as subiquity. Essentially, I am attempting to create an appliance image of ubuntu-server that includes the subiquity snap for the first time appliance setup. Ideally, we would like to make modifications to subiquity, and then preload that directly into the image.
I have gone ahead and setup a basic script pipeline that will prepare and build the ISO using deboostrap. Normally, when I am attempting to install a package onto the image, I would chroot into the base FS that was created by deboostrap, and install all my dependencies. With snap, it seems to complicate it quite a bit because you can’t run it without systemd, and even mounting /run into the chroot env just seems to insatll subiquity on the base system instead of the custom image.
I found out that there is the ability to preseed snaps with the seed.yml file located in /var/lib/snapd/seed, but even when I create my seed.yaml file and place the model assertion in the correct folder, it only appears to install core22 but skips the subiquity installation all together.
Below is the seed.yaml definition I have created for my image:
snaps:
-
name: core
channel: stable
file: core22_1621.snap
-
name: subiquity
channel: stable
file: subiquity_5741.snap
classic: true
On first boot, there are no snap warnings either, and the snap list only shows core22 as installed
ubuntu@ubuntu:~$ snap list
Name Version Rev Tracking Publisher Notes
core22 20240904 1621 latest/stable canonical✓ base
Any help would be greatly appreciated!!