diff options
Diffstat (limited to 'ndt')
-rwxr-xr-x | ndt | 100 |
1 files changed, 100 insertions, 0 deletions
@@ -0,0 +1,100 @@ +#!/usr/bin/env bash + +# +# nagios-downtime(1) -- Shortcut to scheduling fixed downtime in Nagios, +# because it's annoying to do with the web interface for large sets of hosts +# or services. +# +# $ ndt <host>[/<service>] <start> <end> [optional comment] +# +# Good for for/while loops: +# +# for hostname in hosta hostb hostc; do ndt "$hostname" ... ; done +# while read -r hostname; do ndt "$hostname" ... ; done < downtime-hosts +# +# Assumes date(1) with +%s format and --date option (probably only GNU date). +# +# Author: Tom Ryder <tom@sanctum.geek.nz> +# Copyright: 2014 Sanctum +# + +# Name self +self=nagios-downtime + +# Usage printing function +usage() { + printf 'USAGE: %s <host[/service]> <start> <end> [comment]\n' "$self" +} + +# Process options (just help at the moment) +OPTIND=1 +while getopts 'h' opt ; do + case "$opt" in + h) + usage + exit 0 + ;; + '?') + usage >&2 + exit 1 + ;; + esac +done +shift "$((OPTIND-1))" + +# Bail if too few arguments left; we need at least the hostname, the start date, and the end date +if (($# < 3)) ; then + usage >&2 + exit 1 +fi + +# Define relatively fixed/guaranteed fields for Nagios command; note that the +# comment has a default of 'no comment given' +now=$(date +%s) +spec=$1 +fixed=1 +trigger=0 +duration=0 +author=${SUDO_USER:-$USER} +comment=${4:-'no comment given'} +cmdfile=${NAGCMD_FILE:-/usr/local/nagios/var/rw/nagios.cmd} + +# If a service name is specified after a slash, figure that out +if [[ $spec == */* ]] ; then + host=${spec%/*} + service=${spec##*/} +else + host=$spec + service= +fi + +# Quietly replace semicolons in comment with commas +comment=${comment//;/,} + +# Attempt to parse start and end dates; fail usefully if the call doesn't work +if ! dtstart=$(date +%s --date "$2") ; then + printf '%s: Could not parse start date %s' "$self" "$2" >&2 + exit 1 +fi +if ! dtend=$(date +%s --date "$3") ; then + printf '%s: Could not parse end date %s' "$self" "$3" >&2 + exit 1 +fi + +# Write command and print message if it fails; succeed silently +if [[ $service ]] ; then + cmd=$(printf '[%lu] SCHEDULE_SVC_DOWNTIME;%s;%s;%s;%s;%u;%u;%u;%s;%s' \ + "$now" "$host" "$service" "$dtstart" "$dtend" \ + "$fixed" "$trigger" "$duration" "$author" "$comment") +else + cmd=$(printf '[%lu] SCHEDULE_HOST_DOWNTIME;%s;%s;%s;%u;%u;%u;%s;%s' \ + "$now" "$host" "$dtstart" "$dtend" \ + "$fixed" "$trigger" "$duration" "$author" "$comment") +fi + +# Attempt to write command to file +if ! printf '%s\n' "$cmd" > "$cmdfile" ; then + printf '%s: Failed to write command to file\n' "$self" >&2 + exit 1 +fi + |