Nagios pjsip monitor example

check_pjsip.sh

#!/bin/bash

# Copyright (c) James Finstrom. All rights reserved.
# This script is licensed under the 3-Clause BSD License.
# See the full license text at: https://opensource.org/licenses/BSD-3-Clause

# Nagios exit codes
OK=0
WARNING=1
CRITICAL=2
UNKNOWN=3

# Asterisk CLI path
ASTERISK_CLI="/usr/sbin/asterisk -rx"

# Get a list of all PJSIP trunks
trunk_list=$(${ASTERISK_CLI} "pjsip show registrations" | grep 'Name/username' | awk '{print $2}')

# Initialize variables
ok_trunks=""
critical_trunks=""

# Loop through each trunk and check its status
for trunk in ${trunk_list}; do
  trunk_status=$(${ASTERISK_CLI} "pjsip show registration ${trunk}" | grep Status | awk '{print $3}')

  # Evaluate the status and update variables
  if [ "${trunk_status}" == "Registered" ]; then
    ok_trunks="${ok_trunks}${trunk} "
  elif [ "${trunk_status}" == "Unregistered" ]; then
    critical_trunks="${critical_trunks}${trunk} "
  fi
done

# Output Nagios result based on trunk statuses
if [ -n "${critical_trunks}" ]; then
  echo "CRITICAL - Unregistered trunks: ${critical_trunks}"
  exit ${CRITICAL}
elif [ -n "${ok_trunks}" ]; then
  echo "OK - Registered trunks: ${ok_trunks}"
  exit ${OK}
else
  echo "UNKNOWN - No PJSIP trunks found or unable to determine status"
  exit ${UNKNOWN}
fi