check_borg

Check borg repository for date of latest archive.

Usable with nagios, icinga2 or any other nagios-fork.

Usage

./check_borg [ -C CONF ] [ -R <borg-repo-url> ] [ -P <borg-archivename-prefix> ] [ -c <date> ] [ -w <date> ]

<date> can be any valid format parsable by the date-command. So last day or 12 hours ago would be valid dates.

-R can be omitted, when BORG_REPO is set in the environment.

CONF is a file, which will get sourced. It can export variables like BORG_PASSPHRASE and BORG_REPO. You can separate with this file your borg specific secrets from the icinga2 configuration.

Non-standard executable paths

If your borg executable is not installed in your $PATH or is not called borg, you can define the environment variable BORG to point to the correct command.
If the GNU date executable is not installed as date, you can set the environment variable DATE to point to the correct date command.

Passwords

Export BORG_PASSPHRASE.

Requirements

GNU's version of date.
borgbackup

Warnings

Be sure about the implications, when monitoring a repository secured with a passphrase.
I don't know how to exclude checkpoints in borg list in combination with --format='{time}{NUL}'.