| xnox | realtime-neil: _gateway is not currently usable inside initrd. only running system. so yeah, unfortunately one cannot yet use _gateway for url= | 00:27 |
|---|---|---|
| xnox | realtime-neil: there is nfs access for netboot=nfs if you can mount iso over nfs somewhere, that might take less RAM, but nfs is slow. | 00:27 |
| xnox | whole iso, in ram = fast install | 00:27 |
| realtime-neil | xnox: yeah, I remember learning this a few times over the years of working with early user space; namely that the initrd has _far_ less than one might assume. | 12:00 |
| realtime-neil | xnox: I might be interested in serving the iso from NFS ... is there a `python -m nfs.server` I can use to quickly/easily export a network share? | 12:03 |
| xnox | realtime-neil: i do not know of such a thing. I install "the full thing" using https://help.ubuntu.com/community/SettingUpNFSHowTo when i have to. | 12:20 |
| xnox | realtime-neil: i hate nfs | 12:20 |
| cjwatson | You might find nfs-ganesha (a userspace server) easier to set up than the kernel server FWIW | 12:21 |
| cjwatson | Big advantage is that if it gets horribly confused you can just restart a single service | 12:21 |
| realtime-neil | cjwatson: thanks for the suggestion, I'll have to look into that one | 12:22 |
| cjwatson | It's still a bit of a pain, just IME quite a bit less bad | 12:23 |
| realtime-neil | What's the best way to go about remastering a cdimage for the purposes of adding packages and setting debconf values? I found this, https://help.ubuntu.com/community/InstallCDCustomization , but I don't know how much of it has been superseded. | 13:31 |
| realtime-neil | Any approach that preserves the monolithic nature of the *.iso will work for my purposes. Serving a separate `seedfrom=` value will not, though. | 13:32 |
| realtime-neil | I'm also not opposed to patching/building https://code.launchpad.net/ubuntu-cdimage , if anyone knows a way to do that on a host that's _not_ an "Ubuntu production instance". | 13:47 |
| CarlFK | realtime-neil: .iso implies you want physical media ? I thought you wanted to serve the files over a network? | 14:06 |
| realtime-neil | I do want *.iso files, but they'll be consumed in a variety of ways; humans burning CDROMs, humans `dd`ing USB sticks, and netbooters serving the *.iso. | 14:11 |
| realtime-neil | CarlFK: one file, many delivery vectors | 14:12 |
| CarlFK | got it | 14:17 |
| CarlFK | realtime-neil: mk_usb_installer.sh - that relies on the image being a rw fs, makes the script easier and makes R&D easier (I can edit syslinux.cfg and retest, no image/burn step) | 14:42 |
| CarlFK | let me know if you do something like that for ubuntu's new installer | 14:43 |
| CarlFK | I'll try to squeeze it into mk_usb_installer.sh ... but currently no one is asking for it for years now. | 14:44 |
| realtime-neil | CarlFK: I don't know that it has to be an *.iso, but it should be something supported by the `url=` scheme. Maybe there's a different kernel param that instructs the installer to mount a regular disk image, not specifically an *.iso? | 14:47 |
| CarlFK | realtime-neil: no idea. I try to keep the boot media as simple and unaltered as possible, then both pxe and usb pull files from various servers | 15:09 |
| realtime-neil | I have something similar, but it's netboot-centric --- everything lives in one repository, is served therefrom, but everything else is pulled in via preseed actions. | 15:10 |
| realtime-neil | CarlFK: and netboot is great, except because the rootfs squash and packages live on the internet, it's not reproducible | 15:11 |
| xnox | realtime-neil: just to double check 1) you want/preffer http url= netboot 2) use stock iso as "base" 3) tweak it futher to have extra things in the seed / more packages / extra debconf settings (aka a "superset" of "stock" iso?) | 18:06 |
| realtime-neil | yes | 18:06 |
| realtime-neil | xnox: stock iso, gently massaged, repacked, and made available for both download and netbooted `ip=dhcp url=` | 18:07 |
| xnox | realtime-neil: it's not unreasonable. it doesn't currently exist over here. I'll need to think about how to make it easier to do that. | 18:08 |
| xnox | it's a very valid use-case / story. | 18:08 |
| realtime-neil | xnox: excellent; now regarding the possible obsolescence of this: https://help.ubuntu.com/community/InstallCDCustomization ? | 18:09 |
| realtime-neil | If there's better/newer documentation available, I'm interested | 18:10 |
| xnox | realtime-neil: i think it was out of date on arrival. I think it was written about an old series, where $devel has moved on, when it was written. | 18:10 |
| realtime-neil | xnox: understood | 18:10 |
| xnox | realtime-neil: the "best" documentation on tweaking server Iso that I know of, is our test scripts inside subiquity => https://github.com/CanonicalLtd/subiquity/tree/main/scripts | 18:11 |
| xnox | realtime-neil: specifically the inject-subiquity-snap.sh | 18:11 |
| xnox | realtime-neil: it unpacks an iso, tries to inject things, and repack it back. | 18:11 |
| realtime-neil | xnox: i can work with that; much thanks | 18:11 |
| xnox | realtime-neil: it's meant for testing/developer of suibquity snap wihtout/without customized filesystem.squashfs / installer.squashfs / etc. | 18:11 |
| xnox | realtime-neil: but like you could tweak installer.squashfs to have different backed in seed (i think that's the one that has the regular "stock" seed) | 18:12 |
| xnox | realtime-neil: and the filesystem.sqaushfs is the "base" layer that is copied to target. So like extra packages, i'd install into that one. | 18:12 |
| xnox | realtime-neil: ideally, i'd want to make installer.squashfs / iso pool to be a partial mirror of ubuntu. | 18:13 |
| xnox | realtime-neil: such that one can do "apt install --download-only $foo" and append that, and voila local offline authenticated packages are avialable. | 18:13 |
| xnox | which one then can reference in the seed, in an airgapped enviornment. | 18:13 |
| xnox | but again this is vaporware dreams of mine =) | 18:14 |
| realtime-neil | xnox: they have to start somewhere! | 18:14 |
| CarlFK | it's a nice dream | 18:30 |
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