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| title |
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| How to run preparation steps before backups |
Preparation and cleanup hooks
If you find yourself performing prepraration tasks before your backup runs, or
cleanup work afterwards, borgmatic hooks may be of interest. Hooks are
shell commands that borgmatic executes for you at various points, and they're
configured in the hooks section of your configuration file.
For instance, you can specify before_backup hooks to dump a database to file
before backing it up, and specify after_backup hooks to delete the temporary
file afterwards. Here's an example:
hooks:
before_backup:
- dump-a-database /to/file.sql
after_backup:
- rm /to/file.sql
borgmatic hooks run once per configuration file. before_backup hooks run
prior to backups of all repositories. after_backup hooks run afterwards, but
not if an error occurs in a previous hook or in the backups themselves.
Error hooks
borgmatic also runs on_error hooks if an error occurs. Here's an example
configuration:
hooks:
on_error:
- echo "Error while creating a backup."
Hook output
Any output produced by your hooks shows up both at the console and in syslog (when run in a non-interactive console). For more information, read about inspecting your backups.
Security
An important security note about hooks: borgmatic executes all hook commands
with the user permissions of borgmatic itself. So to prevent potential shell
injection or privilege escalation, do not forget to set secure permissions
(chmod 0700) on borgmatic configuration files and scripts invoked by hooks.