Nagios Support Forum

Running this on the NRPE client, works fine

./parse_json_generic.sh 'http://localhost:9200/_cluster/health?pretty=true' \'.status\',\'.timed_out\',\'.number_of_nodes\' "green false 4"
'.status'="green" is OK '.timed_out'=false is OK '.number_of_nodes'=4 is OK

command[check_parse_json_threshold]=/usr/local/nagios/libexec/parse_json_generic.sh $ARG1$ $ARG2$ $ARG3$

Running this from nagios server

./check_nrpe -H xx.xx.xx.xx -c check_parse_json_threshold -a 'http://localhost:9200/_cluster/health?pretty=true' \'.status\',\'.timed_out\',\'.number_of_nodes\' "green false 4"
CHECK_NRPE: Received 0 bytes from daemon. Check the remote server logs for error messages.

CHECK_NRPE: Received 0 bytes from daemon. Check the remote server logs for error messages.

On the client side I see: Error: Request contained illegal metachars!

I found this in the forum

http://support.nagios.com/forum/viewtop ... 7&p=106518

Got rid of the escaping of the single quotes and it worked

You could try the fix that you referenced in the other post which would require you to re-compile nrpe on the client.

Really there is no other solution, I believe it's the \ which are the cause of the problem.

An alternate solution is something like:
Otherwise I would look at doing something like check_by_ssh