add process tags to remote config

Author: vandonr

tracer/src/Datadog.Trace/RemoteConfigurationManagement/Protocol/RcmClientTracer.cs

@@ -12,12 +12,13 @@ namespace Datadog.Trace.RemoteConfigurationManagement.Protocol
 {
     internal class RcmClientTracer
     {
-        public RcmClientTracer(string runtimeId, string tracerVersion, string service, string env, string? appVersion, List<string> tags)
+        public RcmClientTracer(string runtimeId, string tracerVersion, string service, string env, string? appVersion, List<string> tags, string? processTags)
         {
             RuntimeId = runtimeId;
             Language = TracerConstants.Language;
             TracerVersion = tracerVersion;
             Service = service;
+            ProcessTags = processTags;
             Env = env;
             AppVersion = appVersion;
             Tags = tags;
@@ -35,6 +36,9 @@ public RcmClientTracer(string runtimeId, string tracerVersion, string service, s
         [JsonProperty("service")]
         public string Service { get; }
 
+        [JsonProperty("process_tags")]
+        public string? ProcessTags { get; }
+
         [JsonProperty("extra_services")]
         public string[]? ExtraServices { get; set; }
 

tracer/src/Datadog.Trace/RemoteConfigurationManagement/RemoteConfigurationManager.cs

@@ -69,7 +69,7 @@ public static RemoteConfigurationManager Create(
             return new RemoteConfigurationManager(
                     discoveryService,
                     remoteConfigurationApi,
-                    rcmTracer: new RcmClientTracer(settings.RuntimeId, settings.TracerVersion, serviceName, TraceUtil.NormalizeTag(tracerSettings.Environment), tracerSettings.ServiceVersion, tags),
+                    new RcmClientTracer(settings.RuntimeId, settings.TracerVersion, serviceName, TraceUtil.NormalizeTag(tracerSettings.Environment), tracerSettings.ServiceVersion, tags, tracerSettings.PropagateProcessTags ? ProcessTags.SerializedTags : null),
                     pollInterval: settings.PollInterval,
                     gitMetadataTagsProvider,
                     subscriptionManager);

tracer/test/Datadog.Trace.Tests/RemoteConfigurationManagement/RemoteConfigurationApiTests.cs

@@ -243,7 +243,8 @@ private static GetRcmRequest GetRequest(string backendClientStage = null)
             service: nameof(RemoteConfigurationApiTests),
             env: "RCM Test",
             appVersion: "1.0.0",
-            tags: []);
+            tags: [],
+            processTags: "a.b:c,x.y:z");
 
         var state = new RcmClientState(
             rootVersion: 1,