api: add user namespaces field to NodeRuntimeHandlerFeatures

Signed-off-by: Sohan Kunkerkar <sohank2602@gmail.com>

Kubernetes-commit: 86240aaca17e0bfbdbaec78bf2604f8623c73615

core/v1/types.go

@@ -5877,7 +5877,10 @@ type NodeRuntimeHandlerFeatures struct {
 	// +featureGate=RecursiveReadOnlyMounts
 	// +optional
 	RecursiveReadOnlyMounts *bool `json:"recursiveReadOnlyMounts,omitempty" protobuf:"varint,1,opt,name=recursiveReadOnlyMounts"`
-	// Reserved: UserNamespaces *bool (varint 2, for consistency with CRI API)
+	// UserNamespaces is set to true if the runtime handler supports UserNamespaces, including for volumes.
+	// +featureGate=UserNamespacesSupport
+	// +optional
+	UserNamespaces *bool `json:"userNamespaces,omitempty" protobuf:"varint,2,opt,name=userNamespaces"`
 }
 
 // NodeRuntimeHandler is a set of runtime handler information.
@@ -6029,6 +6032,7 @@ type NodeStatus struct {
 	Config *NodeConfigStatus `json:"config,omitempty" protobuf:"bytes,11,opt,name=config"`
 	// The available runtime handlers.
 	// +featureGate=RecursiveReadOnlyMounts
+	// +featureGate=UserNamespacesSupport
 	// +optional
 	// +listType=atomic
 	RuntimeHandlers []NodeRuntimeHandler `json:"runtimeHandlers,omitempty" protobuf:"bytes,12,rep,name=runtimeHandlers"`

core/v1/types_swagger_doc_generated.go

@@ -1238,6 +1238,7 @@ func (NodeRuntimeHandler) SwaggerDoc() map[string]string {
 var map_NodeRuntimeHandlerFeatures = map[string]string{
 	"":                        "NodeRuntimeHandlerFeatures is a set of runtime features.",
 	"recursiveReadOnlyMounts": "RecursiveReadOnlyMounts is set to true if the runtime handler supports RecursiveReadOnlyMounts.",
+	"userNamespaces":          "UserNamespaces is set to true if the runtime handler supports UserNamespaces, including for volumes.",
 }
 
 func (NodeRuntimeHandlerFeatures) SwaggerDoc() map[string]string {

testdata/HEAD/core.v1.Node.json

@@ -161,7 +161,8 @@
       {
         "name": "nameValue",
         "features": {
-          "recursiveReadOnlyMounts": true
+          "recursiveReadOnlyMounts": true,
+          "userNamespaces": true
         }
       }
     ]

testdata/HEAD/core.v1.Node.yaml

@@ -111,6 +111,7 @@ status:
   runtimeHandlers:
   - features:
       recursiveReadOnlyMounts: true
+      userNamespaces: true
     name: nameValue
   volumesAttached:
   - devicePath: devicePathValue