Renew certificates and notify on expiration
===========================================

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> ℹ️ **Info**: This script can not be used on its own but requires the base
> installation. See [main README](../README.md) for details.

Description
-----------

This script tries to download and renew certificates, then notifies about
certificates that are still about to expire.

### Sample notification

![check-certificates notification](check-certificates.d/notification.svg)

Requirements and installation
-----------------------------

Just install the script:

    $ScriptInstallUpdate check-certificates;

Configuration
-------------

The expiry notifications just require notification settings for e-mail,
[matrix](mod/notification-matrix.md) and/or
[telegram](mod/notification-telegram.md).

For automatic download and renewal of certificates you need configuration
in `global-config-overlay`, these are the parameters:

* `CertRenewPass`: an array of passphrases to try
* `CertRenewUrl`: the url to download certificates from

Certificates on the web server should be named `CN.pem` (`PEM` format) or
`CN.p12` (`PKCS#12` format).

Usage and invocation
--------------------

Just run the script:

    /system/script/run check-certificates;

... or create a scheduler for periodic execution:

    /system/scheduler/add interval=1d name=check-certificates on-event="/system/script/run check-certificates;" start-time=startup;

Alternatively running on startup may be desired:

    /system/scheduler/add name=check-certificates-startup on-event="/system/script/run check-certificates;" start-time=startup;

See also
--------

* [Renew locally issued certificates](certificate-renew-issued.md)

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