Add Datadog GlobalTags support

docs/content/observability/tracing/datadog.md

@@ -67,24 +67,53 @@ tracing:
 
 #### `globalTag`
 
+??? warning "Deprecated in favor of the [`globalTags`](#globaltags) option."
+
+    _Optional, Default=empty_
+    
+    Applies a shared key:value tag on all spans.
+    
+    ```yaml tab="File (YAML)"
+    tracing:
+      datadog:
+        globalTag: sample
+    ```
+    
+    ```toml tab="File (TOML)"
+    [tracing]
+      [tracing.datadog]
+        globalTag = "sample"
+    ```
+    
+    ```bash tab="CLI"
+    --tracing.datadog.globalTag=sample
+    ```
+
+#### `globalTags`
+
 _Optional, Default=empty_
 
-Applies a shared key:value tag on all spans.
+Applies a list of shared key:value tags on all spans.
 
 ```yaml tab="File (YAML)"
 tracing:
   datadog:
-    globalTag: sample
+    globalTags:
+      tag1: foo
+      tag2: bar
 ```
 
 ```toml tab="File (TOML)"
 [tracing]
   [tracing.datadog]
-    globalTag = "sample"
+    [tracing.datadog.globalTags]
+      tag1 = "foo"
+      tag2 = "bar"
 ```
 
 ```bash tab="CLI"
---tracing.datadog.globalTag=sample
+--tracing.datadog.globalTags.tag1=foo
+--tracing.datadog.globalTags.tag2=bar
 ```
 
 #### `prioritySampling`

docs/content/reference/static-configuration/cli-ref.md

@@ -1014,6 +1014,9 @@ Enables Datadog debug. (Default: ```false```)
 `--tracing.datadog.globaltag`:  
 Sets a key:value tag on all spans.
 
+`--tracing.datadog.globaltags.<name>`:  
+Sets a list of key:value tags on all spans.
+
 `--tracing.datadog.localagenthostport`:  
 Sets the Datadog Agent host:port. (Default: ```localhost:8126```)
 

docs/content/reference/static-configuration/env-ref.md

@@ -1014,6 +1014,9 @@ Enables Datadog debug. (Default: ```false```)
 `TRAEFIK_TRACING_DATADOG_GLOBALTAG`:  
 Sets a key:value tag on all spans.
 
+`TRAEFIK_TRACING_DATADOG_GLOBALTAGS_<NAME>`:  
+Sets a list of key:value tags on all spans.
+
 `TRAEFIK_TRACING_DATADOG_LOCALAGENTHOSTPORT`:  
 Sets the Datadog Agent host:port. (Default: ```localhost:8126```)
 

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

@@ -373,6 +373,9 @@
   [tracing.datadog]
     localAgentHostPort = "foobar"
     globalTag = "foobar"
+    [tracing.datadog.globalTags]
+      tag1 = "foobar"
+      tag2 = "foobar"
     debug = true
     prioritySampling = true
     traceIDHeaderName = "foobar"

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

@@ -398,6 +398,9 @@ tracing:
   datadog:
     localAgentHostPort: foobar
     globalTag: foobar
+    globalTags:
+      tag1: foobar
+      tag2: foobar
     debug: true
     prioritySampling: true
     traceIDHeaderName: foobar