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.
        --headers HEADERS            Comma-separated list of HTTP headers to include (ex. HOST:somehost,AUTH:letmein).
        --status_level STRING        Comma-separated list of HTTP status codes and their associated Nagios alert levels (ex. 301:1,404:2).
        --status_level_default VALUE The default return code for unexpected HTTP status codes. Defaults to 1.
    -f, --file PATH                  Target file. Incompatible with -u.
    -e, --element ELEMENT...         Desired element (ex. foo=>bar=>ish is foo.bar.ish). Repeatable argument.
    -E, --element_regex REGEX        Desired element expressed as regular expression.
        --element_regex_global       Check all occurring matches. -E is required.
    -d, --delimiter CHARACTER        Element delimiter (default is period).
    -w, --warn VALUE                 Warning threshold (integer or Nagios threshold ranges format).
    -c, --crit VALUE                 Critical threshold (integer or Nagios threshold ranges format).
    -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.
    -U, --result_unknown STRING      Unknown if element is [string]. -C is required.
    -C, --result_crit STRING         Critical if element is [string]. -W is required.
        --result_warn_regex REGEX    Warning if element matches REGEX. --result_crit_regex is required.
        --result_unknown_regex REGEX Unknown if element matches REGEX. --result_crit_regex is required.
        --result_crit_regex REGEX    Critical if element matches REGEX. --result_warn_regex is required.
    -p, --perf ELEMENT               Output additional fields (performance metrics).
        --perf_splitter CHARACTER    Additional fields delimiter (default is comma).
        --output_alt_pipe CHARACTER  Specify a character to replace reserved pipes in the output. Default: !
        --perf_regex REGEX           Output additional fields expressed as regular expression.
        --perf_regex_global          Check all occurring matches. --perf-regex is required.
    -t, --timeout SECONDS            Wait before HTTP timeout.
        --cert PATH                  Client certificate file path
        --key PATH                   Private key file path
        --insecure                   Disable SSL certificate verification (insecure)

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
}