Liora Milbaum
GitHub
commit
e5f22d69fc
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title: containers/bootc
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description: bootc documentation
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title: centos/centos-boot
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description: centos-boot documentation
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baseurl: "/centos-boot"
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url: "https://centos.github.io"
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# Comment above and use below for local development
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@ -32,8 +32,8 @@ color_scheme: coreos
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# Aux links for the upper right navigation
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aux_links:
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"bootc on GitHub":
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- "https://github.com/containers/bootc"
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"centos-boot on GitHub":
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- "https://github.com/centos/centos-boot"
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footer_content: "Copyright © <a href=\"https://www.redhat.com\">Red Hat, Inc.</a> and <a href=\"https://github.com/containers\">others</a>."
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@ -44,7 +44,7 @@ last_edit_time_format: "%b %e %Y at %I:%M %p"
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# Footer "Edit this page on GitHub" link text
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gh_edit_link: true
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gh_edit_link_text: "Edit this page on GitHub"
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gh_edit_repository: "https://github.com/containers/bootc"
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gh_edit_repository: "https://github.com/centos/centos-boot"
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gh_edit_branch: "main"
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gh_edit_source: docs
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gh_edit_view_mode: "tree"
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@ -1,12 +1,20 @@
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# Goals
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This project's toplevel goal is to create base *bootable* container images
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from Fedora ELN and CentOS Stream packages.
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This project's toplevel goal is to maintain default definitions for
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base *bootable* container images, locked with Fedora ELN and CentOS Stream 9.
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## Status
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This is an in-development project not intended for production use yet.
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## Container images
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The primary output of this project is container images. The current
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main development target is [Fedora ELN](https://docs.fedoraproject.org/en-US/eln/)
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and there is one image built:
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- `quay.io/centos-boot/fedora-tier-1:eln`
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## Trying it out
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See [install.md](./install.md).
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@ -23,9 +31,10 @@ include Ignition for example.
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## Differences from RHEL CoreOS
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We sometimes say that RHEL CoreOS [has FCOS as an upstream](https://github.com/openshift/os/blob/master/docs/faq.md#q-what-is-coreos) but this is only
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kind of true; RHEL CoreOS includes a subset of FCOS content, and is lifecycled
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with OCP.
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We sometimes say that RHEL CoreOS
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[has FCOS as an upstream](https://github.com/openshift/os/blob/master/docs/faq.md#q-what-is-coreos)
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but this is only kind of true; RHEL CoreOS includes a subset of FCOS content,
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and is lifecycled with OCP.
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An explicit goal of this project is to produce bootable container images
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that can be used as *base images* for RHEL CoreOS; for more on this, see e.g.
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@ -35,53 +44,24 @@ that can be used as *base images* for RHEL CoreOS; for more on this, see e.g.
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It is an explicit goal that CentOS boot also becomes a "base input" to RHEL for Edge.
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## Demonstration base images for Project CentOS boot
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## Understanding "tiers"
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These images are technology demonstrators, not for production use. The
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intention is that these images are generated by the OS vendor or
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distribution.
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Or, you can fork this repository and generate your own via
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`rpm-ostree compose image`.
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There is a "tier-0" image, but it is not yet being automatically built. The "tier-0"
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contains:
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## Operating system sources
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- kernel
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- systemd
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- bootc
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- selinux-policy-targeted
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At the moment these demonstration builds use Fedora ELN and CentOS Stream 9.
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## Tiers
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### Tier 0
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This is the basic tier; it has effectively just:
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- kernel systemd selinux-policy-targeted bootc
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You are generally going to need to generate derived images from this; installing
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it on its own will boot to a system with no automatic networking support, no SSH,
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and no default passwords etc.
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### Tier 1
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This is larger system.
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The tier-1 is a reasonably large system:
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- NetworkManager, chrony
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- rpm-ostree (to install packages and in case it's useful "day 2")
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- openssh-server
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- dnf (for installing packages in container builds)
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- rpm-ostree (A lot of tooling uses this too)
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At the current time, it does not include Ignition or cloud-init; so you will
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still need to derive from it in order to inject a mechanism to log in in many
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cases. However, it will work to install it using e.g. Anaconda and set up
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users and passwords that way.
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## Image matrix (Fedora)
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- `quay.io/centos-boot/fedora-tier-1:eln`
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### More about image sources
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The current manifest definitions [tier-0](tier-0) and [tier-1](tier-1) were
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forked from Fedora CoreOS, but significantly cut down.
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The existing content set is obviously subject to change and debate.
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The content set for these images is subject to change.
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## Building
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