Universal Blue•9mo ago•

45 replies

Bootc Internals

how do you commit the current root in /sysroot/ostree again

tulip•4/10/25, 6:02 PM

cc @Conan Kudo (ニール・ゴンパ) @Zeglius @Robert

Cappy IshiharaOP•4/10/25, 6:04 PM

here then

Cappy IshiharaOP•4/10/25, 6:04 PM

fuck it

CCappy Ishihara like I want to create a new distro (say, LFS), and then commit it as a bootc ima...

Cappy IshiharaOP•4/10/25, 6:04 PM

Robert•4/10/25, 6:04 PM

You shouldn't need to have that for bootc any more
https://bootc-dev.github.io/bootc/bootc-images.html#ostree-in-container

With bootc 1.1.3 or later, it is no longer required to have a /ostree directory present in the base image.

Cappy IshiharaOP•4/10/25, 6:04 PM

im just curious on bootc internals

Cappy IshiharaOP•4/10/25, 6:04 PM

how would one create a bootc image from scratch

Cappy IshiharaOP•4/10/25, 6:05 PM

do you still need to commit the whole sysroot as an ostree commit and cram that inside the image?

Cappy IshiharaOP•4/10/25, 6:06 PM

so, all you would need to do is simply just build a rootfs from scratch and bootc will figure out the rest?

Zeglius•4/10/25, 6:07 PM

Since not long ago the requirement for ostree container commit was gone, so I'm going to place a bet blindly: maybe bootc doesn't need the ostree repo in the container image at build time

Zeglius•4/10/25, 6:08 PM

@MrToucan rename thread to LTS bootc btw

ZZeglius @MrToucan rename thread to LTS bootc btw

Cappy IshiharaOP•4/10/25, 6:08 PM

LFS*

Zeglius•4/10/25, 6:08 PM

Wait wrong ping

Zeglius•4/10/25, 6:09 PM

@tulip

MrToucan•4/10/25, 6:09 PM

@Zeglius hello! Have a nice day!

CCappy Ishihara so, all you would need to do is simply just build a rootfs from scratch and boot...

Robert•4/10/25, 6:10 PM

Nobody is really making their own base image from scratch.
It's probably possible, but not well documented.

Cappy IshiharaOP•4/10/25, 6:10 PM

hrm,...

RRobert Nobody is really making their own base image from scratch. It's probably possib...

Cappy IshiharaOP•4/10/25, 6:11 PM

yeah, im going by some random people who put arch in a bootc image

RRobert Nobody is really making their own base image from scratch. It's probably possib...

Zeglius•4/10/25, 6:12 PM

At some point we would need to know, whenever Colin kicks out ostree and adds debian/arch support

Cappy IshiharaOP•4/10/25, 6:14 PM

also gonna look at how rhel makes their funny image mode RHEL

Cappy IshiharaOP•4/10/25, 6:14 PM

apparently that's just RHEL in bootc, not RHEL CoreOS

Cappy IshiharaOP•4/10/25, 6:14 PM

sounds redundant but whatever red hat

Robert•4/10/25, 6:15 PM

This is probably what they are using
https://gitlab.com/fedora/bootc/base-images/-/blob/main/bootc-base-imagectl?ref_type=heads

So rpm-ostree container encapsulaterpm-ostree container encapsulate

GitLab

bootc-base-imagectl · main · fedora / bootc / Base Images · GitLab

GitLab.com

Cappy IshiharaOP•4/10/25, 6:16 PM

rpm-ostree

Cappy IshiharaOP•4/10/25, 6:16 PM

damn

Cappy IshiharaOP•4/10/25, 6:16 PM

hmm I wonder if you can just, make an ostree commit and then shove that back in the container

CCappy Ishihara hrm,...

Cappy IshiharaOP•4/10/25, 6:16 PM

for this

Cappy IshiharaOP•4/10/25, 6:17 PM

funny xattr

tulip•4/10/25, 6:22 PM

@Cappy Ishihara if you wanna build ur own base image just clone centos-bootccentos-bootc and change all the centos stuff to fedora

tulip•4/10/25, 6:22 PM

then make cool treefiles and ur done

Cappy IshiharaOP•4/10/25, 6:22 PM

no im just learning how bootc actually works

Cappy IshiharaOP•4/10/25, 6:23 PM

in case anyone would want to build an entire bootc image from scratch

tulip•4/10/25, 6:23 PM

rpm-ostree compose rootfsrpm-ostree compose rootfs chungus

Cappy IshiharaOP•4/10/25, 6:23 PM

thats RPM-specific

tulip•4/10/25, 6:23 PM

gotta check out the source code there

Cappy IshiharaOP•4/10/25, 7:06 PM

ok so apparently yeah thats pretty much it I guess

Cappy IshiharaOP•4/10/25, 7:06 PM

straight up wrote something like this and it just works

CCappy Ishihara straight up wrote something like this and it just works

Zeglius•4/10/25, 7:09 PM

With just that?

Cappy IshiharaOP•4/10/25, 7:09 PM

seems to

Cappy IshiharaOP•4/10/25, 7:10 PM

lemme qemu this

Conan Kudo (ニール・ゴンパ)•4/10/25, 11:10 PM

that seems incomplete? like what about xattrs and everything else?

tulip•4/10/25, 11:11 PM

i dont think you need to xattr anything

tulip•4/10/25, 11:11 PM

ostree should do it

tulip•4/10/25, 11:11 PM

i dont know what else you need tho

tulip•4/30/25, 4:21 AM

experimenting with this

tulip•4/30/25, 4:21 AM

w/ wolfi

Bootc Internals

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