Cloud-Init support

[paulober]

This PR adds basic cloud-init support to Raspberry Pi OS.

[XECDesign]

This won't be relevant when we update the package in our repo, so this is just a general heads up. Instead of using dpkg -i and following it up with apt, you could use apt-get install -y /tmp/cloud-init.deb directly and that will resolve dependencies and install the relevant packages in one step. The trick is that apt-get assumes that you're giving it package names unless it detects that you're giving it a path. I'm guessing it's checking for the presence of a / character, so if the file is in the current directory you'd use ./file.deb.

You could probably even just put '/tmp/cloud-init.deb' in 02-packages, but I haven't tried that, so I'm not sure.

As is, using || true means you ignore potential legitimate errors. Also, we normally nudge people towards apt rather than apt-get because it's more user friendly and handles some things automatically which apt-get doesn't, but in non-interactive scripts such as this one, apt-get is still the way to go. In other words, apt-get for scripting and apt otherwise.

[paulober]

Okay, thanks for explaining. I'll update this for the current state.

[paulober]

Just tried it and when using apt-get install -y /tmp/cloud-init.deb I got a message Note: using cloud-init instead of /tmp/cloud-init.deb

[XECDesign]

I'm guessing the package was updated without bumping the version number? We normally add +rpt1 to the version string to signify that it contains our patches.

[paulober]

Ref to required PR before merge: canonical/cloud-init#5827

Also requires custom NetworkManager and custom cloud-init package in Raspberry Pi OS repositories.