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These match OSTree. There are a variety of use cases here. One is
for test suites; we can stand up a temporary sysroot directory, and
operate on content inside there.
Another is doing virtual machine upgrades offline from a host system,
or upgrading a different OS.
The duplication here is a bit unfortunate; if we add a lot more
commands we should revisit this and perhaps have a common option
group.
I'm working on a patch to add --sysroot support, and for testing
OSTree stuff I often work from a "traditional" host workstation, and
then I have OSTree content in /.
This makes "atomic status" just work for that; I simply have no booted
deployment.
I had an epiphany today while working on
https://bugzilla.redhat.com/show_bug.cgi?id=1098304 - I realized that
I can just do an install, and then copy over everything except the
root entries from /etc/passwd into /usr/lib/passwd.
No need for a patched shadow-utils. No need to modify the
/etc/nsswitch.conf before doing the install root. It totally works.
I have no idea why I originally overcomplicated this.
The thing that sucks a bit about this code is that I have to drop to
the FILE * APIs so that I can use the glibc APIs for processing
group/shadow.
Also, the way I deduplicated the code paths for processing
passwd/group is crappy, but I think it's better than duplicating them
(as systemd-sysusers does).
The good: We don't need a two-step RPM transaction, we don't need
a patch for shadow-utils, it's just saner
The bad: Code is not the most beautiful? Not really bad.
The ugly: I didn't think of this in the first place and spent
months beating my head against the wall of shadow-utils...
Per http://fedoraproject.org/wiki/Features/RemoveSETUID
many programs (famously /usr/bin/ping) switched to using
"file capabilities" instead of setuid.
rpm-ostree had code to specially handle SELinux labels, but was
discarding other xattrs. Let's just whitelist reading in
security.capability.
Closes#14
They get deleted anyways since we blow away the tmpdir, but we expect
people to be using a local HTTP proxy. We stopped trying to cache
packages internally as that caused conflicts with the yum lock with
concurrently executing composes.
After a discussion on what the status command should offer a
sysadmin, we decided to try a column output format similar to that
of systemctl or docker images. This will print the timestamp,
a truncated checksum, the osname, and the refspec of each
deployment. It also includes a --pretty option to print
the information formatted in rows with the full checksum and a
title to specify the default and the rollback target.
This includes several changes to format the code to follow GNU Coding Standards as per
the restof rpm-ostree. This includes fixing indentations, adding spaces between
identifers and parentheses, replacing "goto print" with an else structure, and
reformatting print statements into complete sentences for internationalization.
This allows administrators to configure between deployments and easily see which deployment
they are booted into as well as indicating which is chronologically most recent. This makes
the process more user-friendly, rather than requiring the user to remember which deployment
checksum corresponds to the most recent upgrade.
Currently the systemd RPM ships with default.target ->
graphical.target, which is either itself changed by Anaconda (via
parsing /etc/sysconfig/desktop, which...anyways let's stop here).
Or anaconda might set it directly to multi-user.target.
For rpm-ostree, we perform some minimal level of "preconfiguration"
per tree, so they are directly usable without an intervening
installer.
As an example for fedora-atomic/base/core, we just want
multi-user.target. Thus, this patch provides the treefile author a
declarative mechanism to set it.
Currently on an Atomic compose, I'm seeing abrtd trying to write to
/usr/share/rpm/.dbenv.lock, which is denied by policy because it's
usr_t. There are multiple ways to address this, but there's no good
reason to leave the lock files and __db* files around.
rpm appears to operate correctly without them if calling process
merely gets EROFS.
This is exactly the code from "ostree admin switch", except it's
called "rebase" because in the future it will also carry along any
locally layered packages.
And do the same for "sign". This way we can have the compose server
utilities cleanly separated from what most people will see, which is
the client side tools.
The way this works is still fairly naive in that we hash in two
inputs:
1) The treefile JSON
2) The result of rpm -qa
If both of those are a hit, we reuse the existing commit.
