Fix MicroShift fallback to check for NoMatchError

Use meta.IsNoMatchError to detect missing Network CRD instead
of IsNotFound, matching actual MicroShift API server behavior.

Assisted-By: Claude (claude-4.5-sonnet)
Signed-off-by: Harald Jensås <hjensas@redhat.com>

Author: hjensas

modules/common/ocp/ocp.go

@@ -25,7 +25,7 @@ import (
 	ocp_config "github.com/openshift/api/config/v1"
 	"gopkg.in/yaml.v3"
 	corev1 "k8s.io/api/core/v1"
-	k8serrors "k8s.io/apimachinery/pkg/api/errors"
+	"k8s.io/apimachinery/pkg/api/meta"
 	"k8s.io/apimachinery/pkg/types"
 	k8s_utils "k8s.io/utils/net"
 )
@@ -67,8 +67,8 @@ func HasIPv6ClusterNetwork(ctx context.Context, h *helper.Helper) (bool, error)
 		return false, nil
 	}
 
-	// Fallback for MicroShift: check if error is NotFound
-	if !k8serrors.IsNotFound(err) {
+	// Fallback for MicroShift: check if Network CRD is not available
+	if !meta.IsNoMatchError(err) {
 		return false, err
 	}
 
@@ -106,8 +106,8 @@ func FirstClusterNetworkIsIPv6(ctx context.Context, h *helper.Helper) (bool, err
 		return false, nil
 	}
 
-	// Fallback for MicroShift: check if error is NotFound
-	if !k8serrors.IsNotFound(err) {
+	// Fallback for MicroShift: check if Network CRD is not available
+	if !meta.IsNoMatchError(err) {
 		return false, err
 	}
 

modules/common/ocp/ocp_test.go

@@ -25,11 +25,14 @@ import (
 	. "github.com/onsi/gomega"
 	ocp_config "github.com/openshift/api/config/v1"
 	corev1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/meta"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime/schema"
 	"k8s.io/client-go/kubernetes/scheme"
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 	"sigs.k8s.io/controller-runtime/pkg/client/fake"
+	"sigs.k8s.io/controller-runtime/pkg/client/interceptor"
 )
 
 func setupHelper(objs ...client.Object) (*helper.Helper, error) {
@@ -54,6 +57,39 @@ func setupHelper(objs ...client.Object) (*helper.Helper, error) {
 	return helper.NewHelper(ns, fakeClient, nil, s, ctrl.Log)
 }
 
+func setupHelperWithoutOCPScheme(objs ...client.Object) (*helper.Helper, error) {
+	s := scheme.Scheme
+	err := ocp_config.AddToScheme(s)
+	if err != nil {
+		return nil, err
+	}
+
+	fakeClient := fake.NewClientBuilder().
+		WithScheme(s).
+		WithObjects(objs...).
+		WithInterceptorFuncs(interceptor.Funcs{
+			Get: func(ctx context.Context, client client.WithWatch, key client.ObjectKey, obj client.Object, opts ...client.GetOption) error {
+				if _, ok := obj.(*ocp_config.Network); ok {
+					return &meta.NoKindMatchError{
+						GroupKind:        schema.GroupKind{Group: "config.openshift.io", Kind: "Network"},
+						SearchedVersions: []string{"v1"},
+					}
+				}
+				return client.Get(ctx, key, obj, opts...)
+			},
+		}).
+		Build()
+
+	// Create a minimal namespace object for helper
+	ns := &corev1.Namespace{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "test-namespace",
+		},
+	}
+
+	return helper.NewHelper(ns, fakeClient, nil, s, ctrl.Log)
+}
+
 func TestHasIPv6ClusterNetwork_OCP_IPv4(t *testing.T) {
 	g := NewWithT(t)
 
@@ -135,7 +171,7 @@ func TestHasIPv6ClusterNetwork_MicroShift_IPv4_NodePodCIDR(t *testing.T) {
 		},
 	}
 
-	h, err := setupHelper(node)
+	h, err := setupHelperWithoutOCPScheme(node)
 	g.Expect(err).NotTo(HaveOccurred())
 
 	hasIPv6, err := HasIPv6ClusterNetwork(context.TODO(), h)
@@ -155,7 +191,7 @@ func TestHasIPv6ClusterNetwork_MicroShift_IPv6_NodePodCIDR(t *testing.T) {
 		},
 	}
 
-	h, err := setupHelper(node)
+	h, err := setupHelperWithoutOCPScheme(node)
 	g.Expect(err).NotTo(HaveOccurred())
 
 	hasIPv6, err := HasIPv6ClusterNetwork(context.TODO(), h)
@@ -175,7 +211,7 @@ func TestHasIPv6ClusterNetwork_MicroShift_DualStack_NodePodCIDRs(t *testing.T) {
 		},
 	}
 
-	h, err := setupHelper(node)
+	h, err := setupHelperWithoutOCPScheme(node)
 	g.Expect(err).NotTo(HaveOccurred())
 
 	hasIPv6, err := HasIPv6ClusterNetwork(context.TODO(), h)
@@ -193,7 +229,7 @@ func TestHasIPv6ClusterNetwork_MicroShift_NoPodCIDR(t *testing.T) {
 		Spec: corev1.NodeSpec{},
 	}
 
-	h, err := setupHelper(node)
+	h, err := setupHelperWithoutOCPScheme(node)
 	g.Expect(err).NotTo(HaveOccurred())
 
 	hasIPv6, err := HasIPv6ClusterNetwork(context.TODO(), h)
@@ -259,7 +295,7 @@ func TestFirstClusterNetworkIsIPv6_MicroShift_IPv4First(t *testing.T) {
 		},
 	}
 
-	h, err := setupHelper(node)
+	h, err := setupHelperWithoutOCPScheme(node)
 	g.Expect(err).NotTo(HaveOccurred())
 
 	isIPv6, err := FirstClusterNetworkIsIPv6(context.TODO(), h)
@@ -279,7 +315,7 @@ func TestFirstClusterNetworkIsIPv6_MicroShift_IPv6First(t *testing.T) {
 		},
 	}
 
-	h, err := setupHelper(node)
+	h, err := setupHelperWithoutOCPScheme(node)
 	g.Expect(err).NotTo(HaveOccurred())
 
 	isIPv6, err := FirstClusterNetworkIsIPv6(context.TODO(), h)
@@ -297,7 +333,7 @@ func TestFirstClusterNetworkIsIPv6_MicroShift_NoPodCIDR(t *testing.T) {
 		Spec: corev1.NodeSpec{},
 	}
 
-	h, err := setupHelper(node)
+	h, err := setupHelperWithoutOCPScheme(node)
 	g.Expect(err).NotTo(HaveOccurred())
 
 	isIPv6, err := FirstClusterNetworkIsIPv6(context.TODO(), h)