pushing value to gateway and got error

[Sungmin Jeun]

from prometheus_client import CollectorRegistry, Gauge, push_to_gateway

registry = CollectorRegistry()

g = Gauge('caliper_tps', "", ["client", "instance", "round"], registry=registry)

g.labels(client="0", instance="open2", round="0").set(0)

push_to_gateway('GATEWAY_IP_ADDRESS:9091', job='caliper', registry=registry)

i ran code above and got following error : urllib.error.HTTPError: HTTP Error 400: Bad Request

Also got error from pushgateway log :

level=error

ts=2020-04-11T09:53:48.069Z

caller=push.go:146

msg="pushed metrics are invalid or inconsistent with existing metrics"

method=PUT source=192.168.128.1:50344

err="collected metric \"caliper_tps\"

{

label:<name:\"client\" value:\"0\" >

label:<name:\"instance\" value:\"open2\" >

label:<name:\"job\" value:\"caliper\" >

label:<name:\"round\" value:\"0\" >

gauge:<value:0 > }

is not a UNTYPED"

So I build UnTyped Metric like this..

m = Metric('caliper_tps', "", "untyped")

m.add_sample('caliper_tps', {"client":"0", "instance":"open2", "round":"0"}, 0)

However I have no idea what is different between Metric name and sample name... And How Can I Push this kind of Metric to pushgateway? It doesn't have registry parameters like Gauge..

whew...