So I've dug into this and I wouldn't say this is a bug, but just the apt section being terribly confusing to reason about.
Curtin will always render a sources.list or ubuntu.sources file either using the template built into the ISO (of the same name) or using what is provided to the "sources_list" key. Setting "preserve_sources_list: false" will make sure this file is not overwritten by cloud-init on first boot. The "sources" dictionary is only ever additive and does not change the sources.list/ubuntu.sources file, unless you name your source with the same name (and I think the smart thing here is done here by appending to the file instead of overwriting). Further, this section is not affected by the "preserve_sources_list" key. Any extra sources that end up in sources.list.d will stay there. I think behavior this is sensible, if only unclear on first pass. The template includes the base sources required to install Ubuntu and I imagine most of the time when a user specifies the "sources" key, they just want to include sources in addition to the defaults. That being said, I think you can achieve what you're looking for using the example from the documentation page (https://curtin.readthedocs.io/en/latest/topics/apt_source.html), modified for your use case: apt: preserve_sources_list: false primary: - arches [default] uri: http://landscape.home/repository/standalone/ubuntu/ sources: landscapekey: key: | # full key as block -----BEGIN PGP PUBLIC KEY BLOCK----- ... -----END PGP PUBLIC KEY BLOCK----- Alternatively, "sources_list" accepts the deb822 format in 24.04, so you could do something like this which will give you a little more control: apt: sources_list: | Types: deb URIs: http://landscape.home/repository/standalone/ubuntu/ Suites: noble noble-updates noble-security Components: main universe restricted multiverse Signed-By: 16234E77E46C9DE644E1F4F4DA787C193976C85B Architectures: amd64 sources: landscapekey: key: | # full key as block -----BEGIN PGP PUBLIC KEY BLOCK----- ... -----END PGP PUBLIC KEY BLOCK----- I'm going to mark this bug as Invalid since it's not a regression like I thought it was. ** Changed in: subiquity (Ubuntu) Status: Triaged => Invalid ** Changed in: subiquity (Ubuntu) Assignee: Chris Peterson (cpete) => (unassigned) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2070320 Title: Autoinstall with apt deb822 source on noble does not override '/etc/apt/sources.list.d/ubuntu.sources' despite 'preserve_sources_list: false' To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/subiquity/+bug/2070320/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
