Getting parse error

[nickvth]

[root@apps1 nagios_plugins]# ./check_prometheus_metric.sh -H 'http://localhost' -q 'count(consul_health_service_status{service="test"}) - sum(consul_health_service_status{service="test"})' -c 2 -w 1 -n test UNKNOWN - unable to parse prometheus response test is {};0;1452182545.297

when sh -x ++ get_prometheus_result ++ local _PROMETHEUS_CMD ++ local _RESULT ++ printf -v _PROMETHEUS_CMD '%s -server=%s -timeout=%s query' '/bin/docker run --rm -ti prom/prometheus-cli' http://localhost 30s +++ /bin/docker run --rm -ti prom/prometheus-cli -server=http://localhost -timeout=30s query 'count(consul_health_service_status{service="test"}) - sum(consul_health_service_status{service="test"})' '+ _RESULT='{};0;1452182314.599 =~ ^-?[0-9]+.?[0-9]*$ ]] ++ case "$_RESULT" in '+ printf %s '{};0;1452182314.599 ' PROMETHEUS_RESULT='{};0;1452182314.599 =~ ^-?[0-9]+$ ]]314.599

• [[ false = \t\r\u\e ]]
• NAGIOS_SHORT_TEXT='unable to parse prometheus response' ' NAGIOS_LONG_TEXT='test is {};0;1452182314.599
• exit
• on_exit
• [[ -z '' ]]
• NAGIOS_STATUS=UNKNOWN
• [[ -z unable to parse prometheus response ]]
• printf '%s - %s\n' UNKNOWN 'unable to parse prometheus response' UNKNOWN - unable to parse prometheus response ]][ -n test is {};0;1452182314.599 ' printf '%s\n' 'test is {};0;1452182314.599 test is {};0;1452182314.599
• exit 3

[beorn7]

You have to wrap your expression into scalar(...).