Prepare release v2.11.31

CHANGELOG.md

@@ -1,3 +1,9 @@
+## [v2.11.31](https://github.com/traefik/traefik/tree/v2.11.31) (2025-11-13)
+[All Commits](https://github.com/traefik/traefik/compare/v2.11.30...v2.11.31)
+
+**Bug fixes:**
+- **[docker,docker/swarm]** Auto-negotiate Docker API version ([#12262](https://github.com/traefik/traefik/pull/12262) by [kevinpollet](https://github.com/kevinpollet))
+
 ## [v2.11.30](https://github.com/traefik/traefik/tree/v2.11.30) (2025-10-28)
 [All Commits](https://github.com/traefik/traefik/compare/v2.11.29...v2.11.30)
 

pkg/provider/docker/docker.go

@@ -33,14 +33,6 @@ import (
 	"github.com/traefik/traefik/v2/pkg/version"
 )
 
-const (
-	// DockerAPIVersion is a constant holding the version of the Provider API traefik will use.
-	DockerAPIVersion = "1.24"
-
-	// SwarmAPIVersion is a constant holding the version of the Provider API traefik will use.
-	SwarmAPIVersion = "1.24"
-)
-
 // DefaultTemplateRule The default template for the default rule.
 const DefaultTemplateRule = "Host(`{{ normalize .Name }}`)"
 
@@ -121,13 +113,10 @@ func (p *Provider) createClient() (client.APIClient, error) {
 	httpHeaders := map[string]string{
 		"User-Agent": "Traefik " + version.Version,
 	}
-	opts = append(opts, client.WithHTTPHeaders(httpHeaders))
-
-	apiVersion := DockerAPIVersion
-	if p.SwarmMode {
-		apiVersion = SwarmAPIVersion
-	}
-	opts = append(opts, client.WithVersion(apiVersion))
+	opts = append(opts,
+		client.FromEnv,
+		client.WithAPIVersionNegotiation(),
+		client.WithHTTPHeaders(httpHeaders))
 
 	return client.NewClientWithOpts(opts...)
 }

script/gcg/traefik-bugfix.toml

@@ -4,11 +4,11 @@ RepositoryName = "traefik"
 OutputType = "file"
 FileName = "traefik_changelog.md"
 
-# example new bugfix v2.11.30
+# example new bugfix v2.11.31
 CurrentRef = "v2.11"
-PreviousRef = "v2.11.29"
+PreviousRef = "v2.11.30"
 BaseBranch = "v2.11"
-FutureCurrentRefName = "v2.11.30"
+FutureCurrentRefName = "v2.11.31"
 
 ThresholdPreviousRef = 10
 ThresholdCurrentRef = 10