| realtime-neil | Using the directions here (https://ubuntu.com/server/docs/install/autoinstall-quickstart) I can duplicate that workflow. But, if I change the iso from https://releases.ubuntu.com/focal/ubuntu-20.04-live-server-amd64.iso to https://releases.ubuntu.com/bionic/ubuntu-18.04.4-live-server-amd64.iso, it doesn't work. | 20:58 |
|---|---|---|
| realtime-neil | What's allowing the focal live server iso to work in this case? What does the bionic live server iso lack? | 20:59 |
| realtime-neil | I suspect something in the casper/initrd, but I can't say for certain | 21:00 |
| xnox | realtime-neil: hi, multiple things in livecd-rootfs, how the squashfs are constructed, and how the initrd is built (casper), make many new features work in focal and not on bionic. | 21:17 |
| xnox | realtime-neil: at the moment autoinstall is only supported on focal and up. | 21:17 |
| realtime-neil | ah, okay, gotcha | 21:18 |
| xnox | realtime-neil: specifically cloud-init is configured differently, and ssh is missing. | 21:18 |
| realtime-neil | xnox: is there a workaround I can use with bionic? | 21:18 |
| xnox | realtime-neil: so far we were not tempted to backport all the things to bionic to enable autoinstall in bionic =/ as focal is so awesome, everybody should migrate to focal and totally will next month =) right :-) ?! =) | 21:18 |
| realtime-neil | xnox: RIGHT! | 21:19 |
| * xnox goes back to the fantasy land, where people adopt the new Ubuntu LTS the week before it ships point release. | 21:19 | |
| realtime-neil | xnox: would it be absolutely insane to use the focal kernel-initrd pair to grab a bionic iso with the `url=` trickery? | 21:19 |
| xnox | realtime-neil: that will get you about 70% there, but you will still need to patch bionic iso | 21:24 |
| xnox | realtime-neil: i.e. the installer.squashfs needs cloud-init installed and the /etc/cloud/* stuff to be like it is in the focal iso | 21:24 |
| xnox | realtime-neil: or you could open a feature request against launchpad.net/subiquity "please make autoinstall work in bionic, kthxbye" | 21:25 |
| realtime-neil | xnox: I can ask for things! I'm going to do it! | 21:25 |
| realtime-neil | xnox: is a feature request the same as a Bug, but with a nicer tone? I'm not seeing anything that identifies itself as "feature request". | 21:29 |
| xnox | realtime-neil: it's just a bug yes =) | 21:32 |
| xnox | realtime-neil: nicer tone, always welcome. | 21:32 |
| realtime-neil | Is this enough, or should I make a "real" bug? https://answers.launchpad.net/ubuntu/+source/subiquity/+question/692119 | 21:33 |
| xnox | and then you can like casually mention mwhudson that community are requesting autoinstall support in bionic. and like do ^^^^ | 21:33 |
| mwhudson | why am i in this channel!! | 21:34 |
| mwhudson | anyway, autoinstall for bionic would be possible but also a fiddle | 21:35 |
| realtime-neil | mwhudson: now you've got my curiosity piqued | 21:35 |
| realtime-neil | Also, I made this for you, mwhudson: https://bugs.launchpad.net/ubuntu/+source/subiquity/+bug/1889314 | 21:36 |
| realtime-neil | xnox: yep, I'm 70% of the way there: booting qemu with the focal kernel-initrd pair and a url=http://myhost:3003/ubuntu-18.04.4-live-server-amd64.iso gives me "Unable to find a live filesystem on the network" | 21:45 |
| xnox | realtime-neil: you can like speficy casper ignore uuid, or specify casper uuid = <bionic uuid> => there is a quick check to ensure one is trying to boot a matching kernel+initrd & iso pari. | 21:47 |
| xnox | *pair | 21:47 |
| realtime-neil | xnox: is that a kernel param? which uuid is it referencing? | 21:48 |
| realtime-neil | got it; added appends `live-media-path=/casper/ ignore_uuid` | 21:50 |
| realtime-neil | Sweet! That looks a lot better. | 21:50 |
| xnox | something something man casper something something or like http://manpages.ubuntu.com/manpages/focal/en/man7/casper.7.html | 21:52 |
| xnox | ignore_uuid sounds a bout right | 21:53 |
| realtime-neil | I got as far as the disk partitioning; as soon as I confirm the suggested partitioning scheme, it throws "module bcache not found in directory /lib/modules/5.4.0-26-generic" | 21:59 |
| realtime-neil | I'm guessing that has something to do with the mismatch between the kernel I'm running and the live media I'm using | 21:59 |
| xnox | realtime-neil: yeah indeed that will happen. | 22:17 |
| xnox | realtime-neil: you could switch to terminal and install the modules for the matching kernel you booted. | 22:17 |
| xnox | realtime-neil: i.e. add focal, apt update, install focal's kernel modules. | 22:17 |
| realtime-neil | xnox: in which part? the casper/installer.squashfs ? | 22:43 |
| xnox | hm. | 22:49 |
| xnox | realtime-neil: you can replace the modules squashfs in casper/extra/* no? | 22:49 |
| xnox | realtime-neil: with the right one? inside the bionic image. | 22:50 |
| xnox | replace it with the one from focal image? | 22:50 |
| realtime-neil | xnox: ah, okay got it; within the ubuntu-18.04.4-live-server-amd64.iso, replace the `casper/extras/modules.*` with the ones taken from the ubuntu-20.04-live-server-amd64.iso | 23:44 |
| xnox | realtime-neil: i hope you understand that at this point you are trying to attach the Hand from the Adam's family, onto frankenstein from a different movie. | 23:59 |
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