slack_nagios.sh

#!/bin/bash

# This script is used by Icinga to post alerts into a Slack channel
# using the Incoming WebHooks integration. Create the channel, botname
# and integration first and then add this notification script in your
# Icinga configuration.
#
# All variables that start with NAGIOS_ are provided by Icinga as 
# environment variables when an notification is generated.
# A list of the env variables is available here: 
#   http://nagios.sourceforge.net/docs/3_0/macrolist.html
#
# More info on Slack
# Website: https://slack.com/
# Twitter: @slackhq, @slackapi
#
# Original author:
# Website: matthewmcmillan.blogspot.com
# Twitter: @matthewmcmillan
#
# Modifications by Mark Matienzo (@anarchivist)

#Modify these variables for your environment
MY_NAGIOS_HOSTNAME="nagios.yourdomain.com"
SLACK_HOSTNAME="yourslack.slack.com"
SLACK_TOKEN="xyxyxyourslackkey"
SLACK_CHANNEL="#alerts"
SLACK_USERNAME="nagios"


#Set the message icon based on Icinga service state
if [ "$ICINGA_SERVICESTATE" = "CRITICAL" ]
then
    ICON=":exclamation:"
    COLOR="danger"
elif [ "$ICINGA_SERVICESTATE" = "WARNING" ]
then
    ICON=":warning:"
    COLOR="warning"
elif [ "$ICINGA_SERVICESTATE" = "OK" ]
then
    ICON=":white_check_mark:"
    COLOR="good"
elif [ "$ICINGA_SERVICESTATE" = "UNKNOWN" ]
then
    ICON=":question:"
    COLOR="#00FFFF"
else
    ICON=":white_medium_square:"
    COLOR="#FFFFFF"
fi

#Send message to Slack
PAYLOAD="{\"username\": \"${SLACK_USERNAME}\", \"channel\": \"${SLACK_CHANNEL}\", \"icon_url\": \"https://slack.com/img/services/nagios_48.png\", \"attachments\": [{\"fallback\": \"${ICINGA_NOTIFICATIONTYPE} Service Alert: ${ICINGA_SERVICEDISPLAYNAME} on ${ICINGA_HOSTNAME} is ${ICINGA_SERVICESTATE}\", \"pretext\": \"${ICON} ${ICINGA_NOTIFICATIONTYPE} Service Alert: ${ICINGA_SERVICEDISPLAYNAME} on ${ICINGA_HOSTNAME} is ${ICINGA_SERVICESTATE} - <https://${MY_NAGIOS_HOSTNAME}/icinga|View Icinga>\", \"color\": \"${COLOR}\", \"fields\": [{\"title\": \"Host\", \"value\": \"${ICINGA_HOSTNAME}\", \"short\": true }, {\"title\": \"Service\", \"value\": \"${ICINGA_SERVICEDISPLAYNAME}\", \"short\": true }, {\"title\": \"State\", \"value\": \"${ICINGA_SERVICESTATE}\", \"short\": true }, {\"title\": \"Message\", \"value\": \"${ICINGA_SERVICEOUTPUT}\", \"short\": false }, {\"title\": \"Comment\", \"value\": \"${ICINGA_NOTIFICATIONCOMMENT}\", \"short\": false} ] }]}"
curl -sX POST --data "payload=${PAYLOAD}" https://${SLACK_HOSTNAME}/services/hooks/incoming-webhook?token=${SLACK_TOKEN}