check_elasticsearch_health (edouard.lamoine)

The elasticsearch cat API (since at least v2.x) supports asking for simple status -- this will return just green / yellow / red: http://localhost:9200/_cat/health?h=st'

We also use Shield, and are using this now:
---
#!/bin/bash

#################################################################
# Creation: Edouard Lamoine
# Last Modification: 27 mai 2015
# This script is verifying the elasticsearch status
#
# USAGE: ./check_elasticsearch_health HOST_ADDRESS
#
# ex: ./check_elasticsearch_health localhost
# with Shield:
# ./check_elasticsearch localhost monitoring_user secret password
#
#
#################################################################

#Memo for Nagios outputs
#STATE_OK=0
#STATE_WARNING=1
#STATE_CRITICAL=2
#STATE_UNKNOWN=3

type curl >/dev/null 2>&1 || { echo >&2 "This plugin require curl but it's not installed."; exit 3; }

function usage {
echo "Usage: $(basename $0) HOST_ADDRESS USERNAME PASSWORD"
}

HOST=$1
USERNAME=$2
PASSWORD=$3

if [ -z $USERNAME -a -z $PASSWORD ]
then CREDENTIALS=""
else
CREDENTIALS=" -u $USERNAME:$PASSWORD"
fi

STATUS=`/usr/bin/curl $CREDENTIALS -s $HOST:9200/_cluster/health?pretty|grep status|awk '{print $3}'|cut -d\" -f2`

if [[ $STATUS && "$STATUS" != "green" ]]; then
echo "CRITICAL - Status is $STATUS"
exit 2
fi

if [[ "$STATUS" == "green" ]]; then
echo "OK - Status is $STATUS"
exit 0
fi

echo "UNKNOWN - No data were returned by elastisearch on host $HOST"
exit 3

I can't get this to work! This is how I'm trying:

#./check_elasticsearch_health localhost
CRITICAL - Status is 401
[root@logs:~] #

I think it's because I have shield in place:

#curl -uadmin:$ES_PASS localhost:9200/_cluster/health?pretty
{
"cluster_name" : "elasticsearch",
"status" : "green",
"timed_out" : false,
"number_of_nodes" : 3,
"number_of_data_nodes" : 3,
"active_primary_shards" : 14,
"active_shards" : 28,
"relocating_shards" : 0,
"initializing_shards" : 0,
"unassigned_shards" : 0,
"delayed_unassigned_shards" : 0,
"number_of_pending_tasks" : 0,
"number_of_in_flight_fetch" : 0,
"task_max_waiting_in_queue_millis" : 0,
"active_shards_percent_as_number" : 100.0
}

If I remove shield (temporarily) I can get a status:

#./check_elasticsearch_health localhost
CRITICAL - Status is yellow

Does the script work with shield? What are the flags I can pass to it?