[PRODENG-3593] Add Ubuntu 26.04 (Resolute) host configurer

pkg/configurer/ubuntu/resolute.go

@@ -0,0 +1,29 @@
+package ubuntu
+
+import (
+	"github.com/k0sproject/rig"
+	"github.com/k0sproject/rig/os/registry"
+)
+
+// ResoluteConfigurer is the Ubuntu Resolute Raccoon (26.04) specific host configurer implementation.
+//
+// NOTE: MCR has not published Docker EE packages for Ubuntu 26.04 as of
+// 2026-09-02 (repos.mirantis.com/ubuntu/dists/ and
+// repos-internal.mirantis.com/ubuntu/dists/ only have
+// trusty/xenial/bionic/focal/jammy/noble - no resolute). InstallMCR will
+// fail on this platform until MCR ships support; see PRODENG-3593 and the
+// TestCuttingEdgeCluster smoke test.
+type ResoluteConfigurer struct {
+	Configurer
+}
+
+func init() {
+	registry.RegisterOSModule(
+		func(os rig.OSVersion) bool {
+			return os.ID == "ubuntu" && os.Version == "26.04"
+		},
+		func() interface{} {
+			return ResoluteConfigurer{}
+		},
+	)
+}

pkg/product/mke/config/configurer_test.go

@@ -23,5 +23,6 @@ var (
 	_ HostConfigurer = ubuntu.FocalConfigurer{}
 	_ HostConfigurer = ubuntu.JammyConfigurer{}
 	_ HostConfigurer = ubuntu.NobleConfigurer{}
+	_ HostConfigurer = ubuntu.ResoluteConfigurer{}
 	_ HostConfigurer = ubuntu.XenialConfigurer{}
 )