Small prometheus exporter that does a single thing: It exports the time at which the last restic backup has been done. That's it.
This is not a standalone exporter - rather it generates .prom files that can
be picked up by node-exporter.
In order to use it, first setup node-exporter to watch a directory. If you are
on debian based systems, this can ususally be done by adding the
-collector.textfile.directory option to /etc/default/prometheus-node-exporter:
ARGS="-collector.textfile.directory=\"/var/lib/prometheus/node-exporter/\""Next, create a .env file for restic-exporter with RESTIC_REPOSITORY, RESTIC_PASSWORD and additional variables needed:
# .env
RESTIC_REPOSITORY=
RESTIC_PASSWORD=
AWS_ACCESS_KEY_ID=
AWS_SECRET_ACCESS_KEY=
AWS_DEFAULT_REGION=Now, you can let restic-exporter generate a .prom file which in turn is picked
up and exposed to prometheus by node-exporter.
restic-exporter -name arbitrary-name-hereThis will generate a single stat:
restic_snapshot_timestamp{name="arbitrary-name-here"} 1.599849001e+09I went the node-exporter route here because I personally store backups on a NAS
with spinning hard drives that are spun down most of the time. Thus, I needed a way
to check the backup status at a specific time where the drives are already spun up.
The easiest way to achieve this was the file-generation route in combination with a cronjob.