1b43ad04be
Teach `rpm-ostree compose tree` to accept multiple `--ex-lockfile` arguments. In this case, later lockfiles can override the NEVRA for packages specified in previous lockfiles. This will be used in the FCOS pipeline, where we want to be able to have a shared "base lockfile" and then stream-specific "override lockfiles". I contemplated making this an `include: ...` key instead similar to the manifests, but I'm not sure that paradigm fits as nicely for lockfiles. Making it separate switches instead also makes it trivial to implement in cosa. (And of course, this is all still prefixed with `--ex` which means we are at liberty of changing this interface later on after gaining some experience with it). Closes: #1867 Approved by: cgwalters
rpm-ostree: A true hybrid image/package system
rpm-ostree combines libostree (an image system), with libdnf (a package system), bringing many of the benefits of both together.
+-----------------------------------------+
| |
| rpm-ostree (daemon + CLI) |
+------> <---------+
| | status, upgrade, rollback, | |
| | pkg layering, initramfs --enable | |
| | | |
| +-----------------------------------------+ |
| |
| |
| |
+-----------------|-------------------------+ +-----------------------|-----------------+
| | | |
| libostree (image system) | | libdnf (pkg system) |
| | | |
| C API, hardlink fs trees, system repo, | | ties together libsolv (SAT solver) |
| commits, atomic bootloader swap | | with librepo (RPM repo downloads) |
| | | |
+-------------------------------------------+ +-----------------------------------------+
For more information, see the online manual: Read The Docs (rpm-ostree)
Features:
- Transactional, background image-based (versioned/checksummed) upgrades
- OS rollback without affecting user data (
/usrbut not/etc,/var) via libostree - Client-side package layering (and overrides)
- Easily make your own:
rpm-ostree compose tree
Projects using rpm-ostree
Project Atomic is an umbrella project for delivering upstream container technologies and combined with a minimized, atomically upgradable host system to Fedora, Red Hat Enterprise Linux, and CentOS.
rpm-ostree is the underlying technology for host updates. The headlining project is "Atomic Host", which is a server variant oriented towards running Linux containers using e.g. Kubernetes. However, there is now also a Workstation variant, showing the full generality of the rpm-ostree model.
Manual
For more information, see the online manual: Read The Docs (rpm-ostree)
Talks and media
A number of Project Atomic talks are available; see for example this post which has a bigger collection that also includes talks on containers.
rpm-ostree specific talks:
- devconf.cz 2018: Colin Walters: Hybrid image/package OS updates with rpm-ostree slides
- devconf.cz 2018: Peter Robinson: Using Fedora and OSTree for IoT