--- /dev/null
+#! /bin/sh
+
+OS=$(uname)
+
+# MIT License
+#
+# Copyright (c) 2016 Josef Friedrich <josef@friedrich.rocks>
+#
+# Permission is hereby granted, free of charge, to any person obtaining
+# a copy of this software and associated documentation files (the
+# "Software"), to deal in the Software without restriction, including
+# without limitation the rights to use, copy, modify, merge, publish,
+# distribute, sublicense, and/or sell copies of the Software, and to
+# permit persons to whom the Software is furnished to do so, subject to
+# the following conditions:
+#
+# The above copyright notice and this permission notice shall be
+# included in all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+########################################################################
+# Date functions
+########################################################################
+
+# This date function must be placed on the top of this file because
+# they are used in some global variables.
+
+# to_year ###
+
+##
+# Get the four digit year integer from now.
+#
+# Return:
+# The current 4 digit year.
+##
+_now_to_year() {
+ date +%Y
+}
+
+##
+# Convert a date in the format YYYY-MM-DD to a four digit year integer.
+#
+# Parameters:
+# a date in the format YYYY-MM-DD
+#
+# Return:
+# four digit year integer
+##
+_date_to_year() {
+ local OPTIONS
+ if [ "$OS" = 'Linux' ]; then
+ OPTIONS="--date $1"
+ # FreeBSD, Darwin
+ else
+ OPTIONS="-j -f %Y-%m-%d $1"
+ fi
+ date $OPTIONS +%Y
+}
+
+# to_datetime ###
+
+##
+# Convert a UNIX timestamp to a datetime string.
+#
+# Parameters:
+# UNIX timestamp
+#
+# Return:
+# %Y-%m-%d.%H:%M:%S
+##
+_timestamp_to_datetime() {
+ local OPTIONS
+ if [ "$OS" = 'Linux' ]; then
+ OPTIONS="--date @$1"
+ # FreeBSD, Darwin
+ else
+ OPTIONS="-j -f %s $1"
+ fi
+ date $OPTIONS +%Y-%m-%d.%H:%M:%S
+}
+
+# to_timestamp ###
+
+##
+# Get the current UNIX timestamp.
+#
+# Return:
+# %current UNIX timestamp
+##
+_now_to_timestamp() {
+ date +%s
+}
+
+PROJECT_PAGES='https://github.com/Josef-Friedrich/check_zfs_snapshot
+https://exchange.icinga.com/joseffriedrich/check_zfs_snapshot
+https://exchange.nagios.org/directory/Plugins/System-Metrics/File-System/check_zfs_snapshot/details'
+
+VERSION=1.2
+FIRST_RELEASE=2016-09-08
+SHORT_DESCRIPTION="Monitoring plugin to check how long ago the last \
+snapshot of a ZFS dataset was created."
+USAGE="check_zfs_snapshot v$VERSION
+Copyright (c) $(_date_to_year $FIRST_RELEASE)-$(_now_to_year) \
+Josef Friedrich <josef@friedrich.rocks>
+
+$SHORT_DESCRIPTION
+
+
+Usage: check_zfs_snapshot <options>
+
+Options:
+ -c, --critical=OPT_CRITICAL
+ Interval in seconds for critical state.
+ -d, --dataset=OPT_DATASET
+ The ZFS dataset to check.
+ -h, --help
+ Show this help.
+ -s, --short-description
+ Show a short description of the command.
+ -v, --version
+ Show the version number.
+ -w, --warning=OPT_WARNING
+ Interval in seconds for warning state. Must be lower than -c
+
+Performance data:
+ - last_ago
+ Time interval in seconds for last snapshot.
+ - warning
+ Interval in seconds.
+ - critical
+ Interval in seconds.
+ - snapshot_count
+ How many snapshot exists in the given dataset and all child
+ datasets exists.
+"
+
+# Exit codes
+STATE_OK=0
+STATE_WARNING=1
+STATE_CRITICAL=2
+STATE_UNKNOWN=3
+
+_get_last_snapshot() {
+ zfs get creation -Hpr -t snapshot "$1" | \
+ awk 'BEGIN {max = 0} {if ($3>max) max=$3} END {print max}'
+}
+
+_getopts() {
+ while getopts ':c:d:hsvw:-:' OPT ; do
+ case $OPT in
+
+ c)
+ OPT_CRITICAL=$OPTARG
+ ;;
+
+ d)
+ OPT_DATASET="$OPTARG"
+ ;;
+
+ h)
+ echo "$USAGE"
+ exit 0
+ ;;
+
+ s)
+ echo "$SHORT_DESCRIPTION"
+ exit 0
+ ;;
+
+ v)
+ echo "$VERSION"
+ exit 0
+ ;;
+
+ w)
+ OPT_WARNING=$OPTARG
+ ;;
+
+ \?)
+ echo "Invalid option “-$OPTARG”!" >&2
+ exit 2
+ ;;
+
+ :)
+ echo "Option “-$OPTARG” requires an argument!" >&2
+ exit 3
+ ;;
+
+ -)
+ LONG_OPTARG="${OPTARG#*=}"
+
+ case $OPTARG in
+
+ critical=?*)
+ OPT_CRITICAL=$LONG_OPTARG
+ ;;
+
+ dataset=?*)
+ OPT_DATASET="$LONG_OPTARG"
+ ;;
+
+ help)
+ echo "$USAGE"
+ exit 0
+ ;;
+
+ short-description)
+ echo "$SHORT_DESCRIPTION"
+ exit 0
+ ;;
+
+ version)
+ echo "$VERSION"
+ exit 0
+ ;;
+
+ warning=?*)
+ OPT_WARNING=$LONG_OPTARG
+ ;;
+
+ critical*|dataset*|warning*)
+ echo "Option “--$OPTARG” requires an argument!" >&2
+ exit 3
+ ;;
+
+ help*|short-description*|version*)
+ echo "No argument allowed for the option “--$OPTARG”!" >&2
+ exit 4
+ ;;
+
+ '') # "--" terminates argument processing
+ break
+ ;;
+
+ *)
+ echo "Invalid option “--$OPTARG”!" >&2
+ exit 2
+ ;;
+
+ esac
+ ;;
+
+ esac
+ done
+}
+
+_snapshot_count() {
+ # FreeBSD wc adds some whitespaces before the number!
+ # cat $HOME/debug | wc -l
+ # 7
+ local COUNT
+ COUNT="$(zfs list -t snapshot | grep "$1" | wc -l)"
+ echo $COUNT
+}
+
+_performance_data() {
+ echo "| \
+last_ago=${DIFF}s;$OPT_WARNING;$OPT_CRITICAL;0 \
+count=$(_snapshot_count "$OPT_DATASET");;;0\
+"
+}
+
+## This SEPARATOR is required for test purposes. Please don’t remove! ##
+
+_getopts $@
+
+if [ -z "$OPT_WARNING" ]; then
+ # 1 day
+ OPT_WARNING=86400
+fi
+
+if [ -z "$OPT_CRITICAL" ]; then
+ # 3 day
+ OPT_CRITICAL=259200
+fi
+
+if [ -z "$OPT_DATASET" ]; then
+ echo "Dataset has to be set! Use option -d <dataset>" >&2
+ echo "$USAGE" >&2
+ exit $STATE_UNKNOWN
+fi
+
+if ! zfs list "$OPT_DATASET" > /dev/null 2>&1; then
+ echo "'$OPT_DATASET' is no ZFS dataset!" >&2
+ echo "$USAGE" >&2
+ exit $STATE_UNKNOWN
+fi
+
+NOW=$(_now_to_timestamp)
+
+CREATION_DATE=$(_get_last_snapshot "$OPT_DATASET")
+
+DIFF=$((NOW - CREATION_DATE))
+
+if [ "$OPT_WARNING" -gt "$OPT_CRITICAL" ]; then
+ echo '-w OPT_WARNING must be smaller than -c OPT_CRITICAL'
+ _usage >&2
+ exit $STATE_UNKNOWN
+fi
+
+RETURN=STATE_UNKNOWN
+
+if [ "$DIFF" -gt "$OPT_CRITICAL" ]; then
+ RETURN=$STATE_CRITICAL
+ MESSAGE="CRITICAL:"
+elif [ "$DIFF" -gt "$OPT_WARNING" ]; then
+ RETURN=$STATE_WARNING
+ MESSAGE="WARNING:"
+else
+ RETURN=$STATE_OK
+ MESSAGE="OK:"
+fi
+
+DATE="$(_timestamp_to_datetime "$CREATION_DATE")"
+
+echo "$MESSAGE Last snapshot for dataset '$OPT_DATASET' was created on $DATE $(_performance_data)"
+
+exit $RETURN
projects / perso / Immae / Config / Nix.git / commitdiff
