Usage: ./check_http_json.rb -u <URI> -e <element> -w <warn> -c <crit>
-h, --help                       Help info.
-v, --verbose                    Additional human output.
-u, --uri URI                    Target URI. Incompatible with -f.
    --user USERNAME              HTTP basic authentication username.
    --pass PASSWORD              HTTP basic authentication password.
-f, --file PATH                  Target file. Incompatible with -u.
-e, --element ELEMENT            Desired element (ex. foo=>bar=>ish is foo.bar.ish).
-E, --element_regex REGEX        Desired element expressed as regular expression.
-d, --delimiter CHARACTER        Element delimiter (default is period).
-w, --warn VALUE                 Warning threshold (integer).
-c, --crit VALUE                 Critical threshold (integer).
-r, --result STRING              Expected string result. No need for -w or -c.
-R, --result_regex REGEX         Expected string result expressed as regular expression. No need for -w or -c.
-W, --result_warn STRING         Warning if element is [string]. -C is required.
-C, --result_crit STRING         Critical if element is [string]. -W is required.
-p, --perf ELEMENT               Output additional fields (performance metrics); comma-separated.
-t, --timeout SECONDS            Wait before HTTP timeout.

define command {
    command_name    check_http_json-string
    command_line    /etc/nagios3/plugins/check_http_json.rb -u 'http://$HOSTNAME$:$ARG1$/$ARG2$' -e '$ARG3$' -r '$ARG4$'
}
define service {
    service_description     elasticsearch-cluster-status
    check_command           check_http_json-string!9200!_cluster/health!status!green
}

define command {
    command_name    check_http_json
    command_line    /etc/nagios3/plugins/check_http_json.rb -u 'http://$HOSTNAME$:$ARG1$/$ARG2$' $ARG3$
}
define service {
    service_description     elasticsearch-resident-memory
    check_command           check_http_json!9280!_cluster/nodes/_local/stats!-E resident_in_bytes -w 1024000000 -c 1536000000
}