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#!/bin/bash
#
# todo:
# - thresholds
# - couch response time
# - make CURL/URL/DBLIST_EXCLUDE vars configurable
# - move load_nagios_utils() to helper library so we can use it from multiple scripts
start_time=$(date +%s.%N)
CURL='curl -s --netrc-file /etc/couchdb/couchdb.netrc'
URL='http://127.0.0.1:5984'
TMPFILE=$(mktemp)
DBLIST_EXCLUDE='(user-|sessions_|tokens_|_replicator|_users)'
PREFIX='Couchdb_'
load_nagios_utils () {
# load the nagios utils
# in debian, the package nagios-plugins-common installs utils.sh to /usr/lib/nagios/plugins/utils.sh
utilsfn=
for d in $PROGPATH /usr/lib/nagios/plugins /usr/lib64/nagios/plugins /usr/local/nagios/libexec /opt/nagios-plugins/libexec . ; do
if [ -f "$d/utils.sh" ]; then
utilsfn=$d/utils.sh;
fi
done
if [ "$utilsfn" = "" ]; then
echo "UNKNOWN - cannot find utils.sh (part of nagios plugins)";
exit 3;
fi
. "$utilsfn";
STATE[$STATE_OK]='OK'
STATE[$STATE_WARNING]='Warning'
STATE[$STATE_CRITICAL]='Critical'
STATE[$STATE_UNKNOWN]='Unknown'
STATE[$STATE_DEPENDENT]='Dependend'
}
get_global_stats_perf () {
trap "localexit=3" ERR
local localexit db_count
localexit=0
# get a list of all dbs
$CURL -X GET $URL/_all_dbs | json_pp | egrep -v '(\[|\])' > $TMPFILE
db_count=$( wc -l < $TMPFILE)
excluded_db_count=$( egrep -c "$DBLIST_EXCLUDE" $TMPFILE )
echo "db_count=$db_count|excluded_db_count=$excluded_db_count"
return ${localexit}
}
db_stats () {
trap "localexit=3" ERR
local db db_stats doc_count del_doc_count localexit
localexit=0
db="$1"
name="$2"
if [ -z "$name" ]
then
name="$db"
fi
perf="$perf|${db}_docs=$( $CURL -s -X GET ${URL}/$db | json_pp |grep 'doc_count' | sed 's/[^0-9]//g' )"
db_stats=$( $CURL -s -X GET ${URL}/$db | json_pp )
doc_count=$( echo "$db_stats" | grep 'doc_count' | grep -v 'deleted_doc_count' | sed 's/[^0-9]//g' )
del_doc_count=$( echo "$db_stats" | grep 'doc_del_count' | sed 's/[^0-9]//g' )
# don't divide by zero
if [ $del_doc_count -eq 0 ]
then
del_doc_perc=0
else
del_doc_perc=$(( del_doc_count * 100 / doc_count ))
fi
bytes=$( echo "$db_stats" | grep disk_size | sed 's/[^0-9]//g' )
disk_size=$( echo "scale = 2; $bytes / 1024 / 1024" | bc -l )
echo -n "${localexit} ${PREFIX}${name}_database ${name}_docs=$doc_count|${name}_deleted_docs=$del_doc_count|${name}_deleted_docs_percentage=${del_doc_perc}%"
printf "|${name}_disksize_mb=%02.2fmb ${STATE[localexit]}: database $name\n" "$disk_size"
return ${localexit}
}
# main
load_nagios_utils
# per-db stats
# get a list of all dbs
$CURL -X GET $URL/_all_dbs | json_pp | egrep -v '(\[|\])' > $TMPFILE
# get list of dbs to check
dbs=$( egrep -v "${DBLIST_EXCLUDE}" $TMPFILE | tr -d '\n"' | sed 's/,/ /g' )
for db in $dbs
do
db_stats "$db"
done
# special handling for rotated dbs
suffix=$(($(date +'%s') / (60*60*24*30)))
db_stats "sessions_${suffix}" "sessions"
db_stats "tokens_${suffix}" "tokens"
# show global couchdb stats
global_stats_perf=$(get_global_stats_perf)
exitcode=$?
end_time=$(date +%s.%N)
duration=$( echo "scale = 2; $end_time - $start_time" | bc -l )
printf "${exitcode} ${PREFIX}global_stats ${global_stats_perf}|script_duration=%02.2fs ${STATE[exitcode]}: global couchdb status\n" "$duration"
rm "$TMPFILE"
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