Add OpenTelemetry tracing and metrics support

docs/content/reference/static-configuration/file.toml

@@ -307,6 +307,25 @@
     [metrics.influxDB2.additionalLabels]
       name0 = "foobar"
       name1 = "foobar"
+  [metrics.openTelemetry]
+    address = "foobar"
+    addEntryPointsLabels = true
+    addRoutersLabels = true
+    addServicesLabels = true
+    pushInterval = "42s"
+    path = "foobar"
+    explicitBoundaries =  [42.0, 42.0]
+    insecure = true
+    [metrics.openTelemetry.headers]
+      name0 = "foobar"
+      name1 = "foobar"
+    [metrics.openTelemetry.tls]
+      ca = "foobar"
+      caOptional = true
+      cert = "foobar"
+      insecureSkipVerify = true
+      key = "foobar"
+    [metrics.openTelemetry.grpc]
 
 [ping]
   entryPoint = "foobar"
@@ -391,6 +410,20 @@
     serverURL = "foobar"
     secretToken = "foobar"
     serviceEnvironment = "foobar"
+  [tracing.openTelemetry]
+    address = "foobar"
+    insecure = true
+    path = "foobar"
+    [tracing.openTelemetry.headers]
+      name0 = "foobar"
+      name1 = "foobar"
+    [tracing.openTelemetry.tls]
+      ca = "foobar"
+      caOptional = true
+      cert = "foobar"
+      key = "foobar"
+      insecureSkipVerify = true
+    [tracing.openTelemetry.grpc]
 
 [hostResolver]
   cnameFlattening = true