[RFE] Support configs in /usr/lib/ostree/ that get overridden by configs in /etc

[sinnykumari]

While having a discussion on Fedora CoreOS communit meeting, it came up that it will be a nice feature to support having configs in /usr/lib/ostree/ . Users can override these configs if needed by specifying it in /etc/ . This will allow us to debug and fix easily if any issue occurs on the user's machine is due to their local config changes.

[sinnykumari]

We can make use of this feature in coreos/fedora-coreos-tracker#143 , where we are planning to ship ostree remote config in an rpm.

[jlebon]

To clarify, there are two major kinds of config files in OSTree: repo configs and remote configs. To make matters more complicated, in non system scenarios, remote configs are stored in the repo config directly.

For the purposes of this ticket though, we're essentially talking about remote configs in system scenarios, right? IOW, I think we're talking about a /usr/lib/ostree/remotes.d dir with overrides in /etc/ostree/remotes.d and possibly /run/ostree/remotes.d?

[sinnykumari]

For the purposes of this ticket though, we're essentially talking about remote configs in system scenarios, right? IOW, I think we're talking about a /usr/lib/ostree/remotes.d dir with overrides in /etc/ostree/remotes.d

Yes, we are talking here (coreos/fedora-coreos-tracker#143) about having remote config in `/usr/lib/ostree/remotes.d/ dir with overrides in /etc/ostree/remotes.d/ .

I made this RFE generic because I thought we might have other configs as well which we want to override.

and possibly /run/ostree/remotes.d?

didn't know that this exist as well

[rfairley]

Related: #1801 to support {/etc,/usr/lib}/ostree/bootloaders (once sysroot.bootloader is a repo config key in #1814).