Icinga2 Bash Script for Downtime

maintenance

#!/bin/bash

# Icinga2 Maintenance mode / Downtime
#
# https://icinga.com/docs/icinga2/latest/doc/12-icinga2-api/#icinga2-api-actions

# Program details
PROGNAME=$(basename $0)
RELEASE="Revision 1.0.0"
AUTHOR="(c) 2020 Paul Bargewell (paul.bargewell@opusvl.com)"

CURL=`which curl`
JQ=`which jq`
JO=`which jo`

if [[ -z "$CURL" ]]; then
  echo "Missing curl"
  exit 1
fi

# JQ for nice JSON return format
if [[ -z "$JQ" ]]; then
  echo "Missing jq"
  exit 1
fi

# JO for creating the JSON request data
if [[ -z "$JO" ]]; then
  echo "Missing jo"
  exit 1
fi

# Functions plugin usage
print_release() {
  echo "$RELEASE $AUTHOR"
}

DURATION='1 hour' # Default duration
URL="https://icinga2:5665" # Default URL
STATE="down" # Default state

print_usage() {
  echo ""
  echo "$PROGNAME $RELEASE -Add a scheduled downtime to icinga2 host/service"
  echo ""
  echo "Usage: $PROGNAME"
  echo ""
  echo "  -h | --help      Show this page"
  echo ""
  echo "  -d | --duration  Downtime duration, eg. '1 hour', '15 min' (default: '1 hour'"
  echo ""
  echo "  -H | --host      Name of host to add downtime (required)"
  echo ""
  echo "  -s | --service   Name of service to add downtime"
  echo ""
  echo "  -U | --url       Icinga2 API URL"
  echo ""
  echo "  -v | --version   Version"
  echo ""
  echo "Usage: $PROGNAME --help"
  echo ""
  exit 0
}

print_help() {
  print_usage
  echo ""
  echo "Add a scheduled downtime to icinga2 host/service"
  echo ""
  exit 0
}

# Parse parameters
while [ $# -gt 0 ]; do
  case "$1" in
    -h | --help)
      print_help
      exit 0
      ;;
    -v | --version)
      print_release
      exit 0
      ;;
    -H | --host)
      shift
      HOST=$1
      ;;
    -s | --service)
      shift
      SERVICE=$1
      ;;
    -d | --duration)
      shift
      DURATION=$1
      ;;
    -c | --comment)
      shift
      COMMENT=$1
      ;;
    -u | --username)
      shift
      USERNAME=$1
      ;;
    -p | --password)
      shift
      PASSWORD=$1
      ;;
    -U | --url)
      shift
      URL=$1
      ;;
    --state)
      shift
      STATE=$1
      ;;
    *)
      echo "Unknown argument: $1"
      print_usage
      ;;
  esac
  shift
done

if [[ -z "${HOST}" ]]; then
  echo "Must specify a host"
  exit 1
fi

if [[ -z "${USERNAME}" || -z "${PASSWORD}" ]]; then
  echo "Must specify a username and password"
  exit 1
fi

if [[ ! -z "$SERVICE" ]]; then
  TYPE="Service"
  SERVICE=" && service.name==\"${SERVICE}\""
else
  TYPE="Host"
fi

if [[ "${STATE}" == "down" ]]; then

  NOW=`date +"%Y-%m-%d %T"`
  NOW_EPOCH=`date -d "$NOW" +%s`

  ENDS=`date -d "${DURATION}" +"%Y-%m-%d %T"`
  ENDS_EPOCH=`date -d "$ENDS" +%s`

  DURATION_SECONDS=`expr $ENDS_EPOCH - $NOW_EPOCH`

  if [[ -z "$COMMENT" ]]; then
    COMMENT="Scheduled downtime between $NOW until $ENDS ( $DURATION )"
  fi

  ACTION="schedule-downtime"

  JSON=$(${JO} -p author=$(id -un) comment="${COMMENT}" start_time=$(date -d "$NOW" +%s) \
    end_time=$(date -d "$ENDS" +%s) duration=${DURATION_SECONDS} type=${TYPE} \
    filter="host.name==\"${HOST}\"${SERVICE}" )

else

  # Remove downtimes for the specified host / service

  ACTION="remove-downtime"

  JSON=$(${JO} -p author=$(id -un) \
    type="${TYPE}" \
    filter="host.name==\"${HOST}\"${SERVICE}" )

fi

${CURL} -u ${USERNAME}:${PASSWORD} \
  -k --silent "${URL}/v1/actions/${ACTION}" -H "Accept: application/json" \
  -d "${JSON}" -X POST | ${JQ}