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It isn't useful at the moment, since the deploy stuff all changed. It
will make sense to bring back later, but for now let's not carry
broken untested code.
While the systemd integration effectively requires /sysroot, it will
help people trying to use OSTree with other initramfs systems
(e.g. initramfs-tools) if we don't hardcode that requirement in this
tool.
These corruption tests could be a lot better...like randomly try
single bit flips, range flips. Better, content-aware fuzzing. But
this is useful for now.
If pull is interrupted, we may have downloaded an arbitrary subset of
the requested objects. Previously, we handled this by scanning for
all objects each time.
However, there's an easy optimization - this patch creates a lock file
in the repo. If we don't see that file when starting a pull, we know
we don't need to stat() every file; presence of a dirtree object for
example implies the existence of everything it references.
Originally, the idea was that clients would replicate "OS/tree"s from
a build server, but we'd run things like "ldconfig" on the client.
This was to allow adding e.g. the nVidia binary driver.
However, the triggers were the only thing in the system at the moment
that really had expected knowledge of the *contents* of the OS, like
the location of binaries.
For now, it's architecturally cleaner if we move the burden of
triggers to the tree builder (e.g. gnome-ostree or RPM). Eventually
we may want OSTree to assist with this type of thing (perhaps
something like RPM %ghost), but this is the right thing to do now.
See https://wiki.gnome.org/OSTree/DeploymentModel2
This is a major rework of the on-disk filesystem layout, and the boot
process. OSTree now explicitly supports upgrading kernels, and these
upgrades are also atomic.
The core concept of the new model is the "deployment list", which is
an ordered list of bootable operating system trees. The deployment
list is reflected in the bootloader configuration; which has a kernel
argument that tells the initramfs (dracut) which operating system root
to use.
Invidiual notable changes that come along with this:
1) Operating systems should now come with their etc in usr/etc; OSTree
will perform a 3-way merge at deployment time, and place etc in
the actual root. This avoids the need for a bind mount, and is
just a lot cleaner.
2) OSTree no longer bind mounts /root, /home, and /tmp. It is expected
that the the OS/ has these as symbolic links into /var.
At the moment, OSTree only supports managing syslinux; other
bootloader backends will follow.
This version of the code doesn't know what to do with new-model trees,
so just abort if we see that. We'll likely never care about upgrades
from 1.0 to 2.0.
A simple HTTP server implementation is so few lines of code when one
is linking to libsoup anyways, so let's just have one here in ostree
that will be used for the test suite.
This allows us to run the archive tests that previously required
apache even in gnome-ostree.
Even if very suboptimally, for now; we copy the files, then copy them
again.
The obvious long term plan is to merge pull-local and pull together,
but truly optimizing that requires the pull code to know how to use
the OstreeRepo APIs when operating on local repositories (as
pull-local does), rather than assuming the remote is an archive-z
fetched over HTTP.
