This commit adds an `ExecCondition` directive on the `container-build@`
service, used as a pre-requisite for all other Podman-based services,
skipping `podman build` invocations unless local `Containerfile` or any
files in the `container` sub-directories have changed.
Container builds are responsible for the majority of time taken during
boot, even with cache in place; this will help alleviate pressure and
hopefully speed up boot considerably.
Container auto-updates are scheduled for 30 minutes past every hour, or
approximately 30 minutes after `coreos-home-server-update` runs, in
order to give enough time for container builds to complete; only
containers with auto-updates enabled are eligible, however.
This also enables health-checks for Redis, and updates the version to
7.2.
Container volume backup logic has been moved to a (largely equivalent)
external script, allowing for future expansion of functionality. In
addition, a `rclone-pull@` service has been added and set up as a default
dependency for the `container-volume-restore@` service, allowing for
automatic set up of servers based on latest remote backups.
Pointers to the latest backup are useful for restore operations, but
should be ignored in all other cases, and thus are more appropriately
handled as symbolic links.
Container volume backups will now be skipped if no changes have been
made in source files against the latest backup. In addition the default
timer has been changed for performing backups once a day, at 02:00,
likely a time where there's less traffic on the server.
This commit contains a fairly large diff for a fairly small change:
moving the `config/common` directory to `host/base` to better reflect
its intended use, and promoting `config/service` to the root directory.
These changes unlock some improvements in `coreos-home-server-update`
processes, which will (assuming `/etc/coreos-home-server/base` exists)
keep host-wide systemd services in sync in addition to service-specific
ones.
Changes have been make to the `Makefile` and a few other places where
`config/common` was referenced, but most of this work is renames that
are not intended to break compatibility with new or running servers.
