Add service name label by default (#84)

It adds a label to all jaeger's generated metrics that can be used to identify every microservice.

See jaegertracing/jaeger-client-python#269.

I messed up the previous PR, it's the same as this. #72

Author: alexppg

Pipfile

@@ -10,7 +10,7 @@ pyyaml = ">=5.1.2"
 anyconfig = ">=0.9.8"
 swagger-ui-bundle = ">=0.0.2"
 connexion = {extras = ["swagger-ui"],version = "==2.4.0"}
-jaeger-client = "==4.2.0"
+jaeger-client = "==4.3.0"
 flask-opentracing = "*"
 opentracing = ">=2.1"
 opentracing-instrumentation = "==3.2.1"

Pipfile.lock

@@ -71,7 +71,8 @@ def init_jaeger_tracer(self):
         metrics_config = get_conf(service=get_service_name(service="metrics"), empty_init=True)
         metrics = ""
         if metrics_config:
-            metrics = PrometheusMetricsFactory()
+            service_name = self.component_name.lower().replace("-", "_").replace(" ", "_")
+            metrics = PrometheusMetricsFactory(service_name_label=service_name)
         config = Config(
             config={
                 **{