check_gemini.sh for capsule monitoring

README.md

@@ -40,6 +40,7 @@ Monitoring
   * [collectd_ntppool_score](https://forge.tourmentine.com/n/scripts/src/master/monitoring/collectd_ntppool_score) => Same as [check_ntppool_score](https://forge.tourmentine.com/n/scripts/src/master/monitoring/check_ntppool_score) but for collectd graphing.
   * [check_postgresql_replication.sh](https://forge.tourmentine.com/n/scripts/src/master/monitoring/check_postgresql_replication.sh) => check postgresql's replication lag.
   * [check_rspamc](https://forge.tourmentine.com/n/scripts/src/master/monitoring/check_rspamc) => Check rspamd status. Heavily based on [check_spamc](https://www.vanheusden.com/Linux/check_spamc-0.1.tgz).
+  * [check_gemini.sh](https://forge.tourmentine.com/n/scripts/src/master/monitoring/check_gemini.sh) => Nagios/Icinga check for Gemini capsule availability. Requires gnutls for now (not tested with other tls clients).
   * [GonKyrellM](https://forge.tourmentine.com/n/scripts/src/master/monitoring/GonKyrellM) => Conky, GKrellM style - with "invisible" theme (well, sort of)
   * [collectweather.sh](https://forge.tourmentine.com/n/scripts/src/master/monitoring/collectweather.sh) => get weather data from https://darksky.net/ and feed collectd with it. needs jq as Dark Sky provides data in json format.
 

monitoring/check_gemini.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+TLS_CLIENT="/usr/local/bin/gnutls-cli -p 1965"
+
+if [ "$1" = "-h" ]
+then
+  echo "usage: $0 <capsule name> (without gemini:// scheme)"
+  echo
+  return 0
+fi
+
+errorOutput=$(echo -n  "gemini://$1/\r\n" | ${TLS_CLIENT} $1 2>&1 > /dev/null)
+errorCode=$?
+if [ $errorCode -gt 0 ]
+then
+  echo "ERROR: ${errorOutput}"
+  return 2
+else
+  echo "OK: capsule responding"
+  return 0
+fi