Add MachinePool conversion

Signed-off-by: Stefan Bueringer <[email protected]>

config/crd/kustomization.yaml

@@ -18,6 +18,7 @@ patchesStrategicMerge:
 # patches here are for enabling the conversion webhook for each CRD
 - patches/webhook_in_clusterclasses.yaml
 - patches/webhook_in_clusters.yaml
+- patches/webhook_in_machinepools.yaml
 - patches/webhook_in_machines.yaml
 - patches/webhook_in_machinesets.yaml
 - patches/webhook_in_machinedeployments.yaml
@@ -28,6 +29,7 @@ patchesStrategicMerge:
 # patches here are for enabling the CA injection for each CRD
 - patches/cainjection_in_clusterclasses.yaml
 - patches/cainjection_in_clusters.yaml
+- patches/cainjection_in_machinepools.yaml
 - patches/cainjection_in_machines.yaml
 - patches/cainjection_in_machinesets.yaml
 - patches/cainjection_in_machinedeployments.yaml

config/crd/patches/cainjection_in_machinepools.yaml

@@ -0,0 +1,8 @@
+# The following patch adds a directive for certmanager to inject CA into the CRD
+# CRD conversion requires k8s 1.13 or later.
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  annotations:
+    cert-manager.io/inject-ca-from: $(CERTIFICATE_NAMESPACE)/$(CERTIFICATE_NAME)
+  name: machinepools.cluster.x-k8s.io

config/crd/patches/webhook_in_machinepools.yaml

@@ -0,0 +1,19 @@
+# The following patch enables conversion webhook for CRD
+# CRD conversion requires k8s 1.13 or later.
+apiVersion: apiextensions.k8s.io/v1
+kind: CustomResourceDefinition
+metadata:
+  name: machinepools.cluster.x-k8s.io
+spec:
+  conversion:
+    strategy: Webhook
+    webhook:
+      conversionReviewVersions: ["v1", "v1beta1"]
+      clientConfig:
+        # this is "\n" used as a placeholder, otherwise it will be rejected by the apiserver for being blank,
+        # but we're going to set it later using the cert-manager (or potentially a patch if not using cert-manager)
+        caBundle: Cg==
+        service:
+          namespace: system
+          name: webhook-service
+          path: /convert

exp/api/v1alpha3/conversion.go

@@ -17,26 +17,65 @@ limitations under the License.
 package v1alpha3
 
 import (
-	"k8s.io/apimachinery/pkg/conversion"
-	v1beta1 "sigs.k8s.io/cluster-api/exp/api/v1beta1"
+	apimachineryconversion "k8s.io/apimachinery/pkg/conversion"
+	"sigs.k8s.io/cluster-api/exp/api/v1beta1"
 	"sigs.k8s.io/controller-runtime/pkg/controller/controllerutil"
+	"sigs.k8s.io/controller-runtime/pkg/conversion"
 )
 
 // Convert_v1alpha3_MachinePoolSpec_To_v1beta1_MachinePoolSpec is an autogenerated conversion function.
-func Convert_v1alpha3_MachinePoolSpec_To_v1beta1_MachinePoolSpec(in *MachinePoolSpec, out *v1beta1.MachinePoolSpec, s conversion.Scope) error {
+func Convert_v1alpha3_MachinePoolSpec_To_v1beta1_MachinePoolSpec(in *MachinePoolSpec, out *v1beta1.MachinePoolSpec, s apimachineryconversion.Scope) error {
 	return autoConvert_v1alpha3_MachinePoolSpec_To_v1beta1_MachinePoolSpec(in, out, s)
 }
 
-func Convert_v1alpha3_MachinePool_To_v1beta1_MachinePool(in *MachinePool, out *v1beta1.MachinePool, s conversion.Scope) error {
+func Convert_v1alpha3_MachinePool_To_v1beta1_MachinePool(in *MachinePool, out *v1beta1.MachinePool, s apimachineryconversion.Scope) error {
 	if err := autoConvert_v1alpha3_MachinePool_To_v1beta1_MachinePool(in, out, s); err != nil {
 		return err
 	}
 
 	// Replace v1alpha3 finalizer to allow old MachinePools to get deleted.
-	if !controllerutil.ContainsFinalizer(out, MachinePoolFinalizer) {
+	if controllerutil.ContainsFinalizer(out, MachinePoolFinalizer) {
 		controllerutil.RemoveFinalizer(out, MachinePoolFinalizer)
 		controllerutil.AddFinalizer(out, v1beta1.MachinePoolFinalizer)
 	}
 
 	return nil
 }
+
+func Convert_v1beta1_MachinePool_To_v1alpha3_MachinePool(in *v1beta1.MachinePool, out *MachinePool, s apimachineryconversion.Scope) error {
+	if err := autoConvert_v1beta1_MachinePool_To_v1alpha3_MachinePool(in, out, s); err != nil {
+		return err
+	}
+
+	// Replace v1beta1 finalizer to allow old MachinePools to get deleted.
+	if controllerutil.ContainsFinalizer(out, v1beta1.MachinePoolFinalizer) {
+		controllerutil.RemoveFinalizer(out, v1beta1.MachinePoolFinalizer)
+		controllerutil.AddFinalizer(out, MachinePoolFinalizer)
+	}
+
+	return nil
+}
+
+func (src *MachinePool) ConvertTo(dstRaw conversion.Hub) error {
+	dst := dstRaw.(*v1beta1.MachinePool)
+
+	return Convert_v1alpha3_MachinePool_To_v1beta1_MachinePool(src, dst, nil)
+}
+
+func (dst *MachinePool) ConvertFrom(srcRaw conversion.Hub) error {
+	src := srcRaw.(*v1beta1.MachinePool)
+
+	return Convert_v1beta1_MachinePool_To_v1alpha3_MachinePool(src, dst, nil)
+}
+
+func (src *MachinePoolList) ConvertTo(dstRaw conversion.Hub) error {
+	dst := dstRaw.(*v1beta1.MachinePoolList)
+
+	return Convert_v1alpha3_MachinePoolList_To_v1beta1_MachinePoolList(src, dst, nil)
+}
+
+func (dst *MachinePoolList) ConvertFrom(srcRaw conversion.Hub) error {
+	src := srcRaw.(*v1beta1.MachinePoolList)
+
+	return Convert_v1beta1_MachinePoolList_To_v1alpha3_MachinePoolList(src, dst, nil)
+}

exp/api/v1alpha3/conversion_test.go

@@ -0,0 +1,70 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha3
+
+import (
+	"testing"
+
+	fuzz "github.com/google/gofuzz"
+	"k8s.io/apimachinery/pkg/api/apitesting/fuzzer"
+	runtimeserializer "k8s.io/apimachinery/pkg/runtime/serializer"
+	clusterv1 "sigs.k8s.io/cluster-api/api/v1alpha3"
+	clusterv1exp "sigs.k8s.io/cluster-api/exp/api/v1beta1"
+	utilconversion "sigs.k8s.io/cluster-api/util/conversion"
+)
+
+func TestFuzzyConversion(t *testing.T) {
+	t.Run("for MachinePool", utilconversion.FuzzTestFunc(utilconversion.FuzzTestFuncInput{
+		Hub:         &clusterv1exp.MachinePool{},
+		Spoke:       &MachinePool{},
+		FuzzerFuncs: []fuzzer.FuzzerFuncs{fuzzFuncs},
+	}))
+}
+
+func fuzzFuncs(_ runtimeserializer.CodecFactory) []interface{} {
+	return []interface{}{
+		BootstrapFuzzer,
+		MachinePoolSpecFuzzer,
+		ObjectMetaFuzzer,
+	}
+}
+
+func BootstrapFuzzer(obj *clusterv1.Bootstrap, c fuzz.Continue) {
+	c.FuzzNoCustom(obj)
+
+	// Bootstrap.Data has been removed in v1alpha4, so setting it to nil in order to avoid v1alpha3 --> <hub> --> v1alpha3 round trip errors.
+	obj.Data = nil
+}
+
+func ObjectMetaFuzzer(in *clusterv1.ObjectMeta, c fuzz.Continue) {
+	c.FuzzNoCustom(in)
+
+	// These fields have been removed in v1beta1
+	// data is going to be lost, so we're forcing zero values here.
+	in.Name = ""
+	in.GenerateName = ""
+	in.Namespace = ""
+	in.OwnerReferences = nil
+}
+
+func MachinePoolSpecFuzzer(in *MachinePoolSpec, c fuzz.Continue) {
+	c.Fuzz(in)
+
+	// These fields have been removed in v1beta1
+	// data is going to be lost, so we're forcing zero values here.
+	in.Strategy = nil
+}

exp/api/v1alpha4/conversion.go

@@ -0,0 +1,46 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha4
+
+import (
+	v1beta1 "sigs.k8s.io/cluster-api/exp/api/v1beta1"
+	"sigs.k8s.io/controller-runtime/pkg/conversion"
+)
+
+func (src *MachinePool) ConvertTo(dstRaw conversion.Hub) error {
+	dst := dstRaw.(*v1beta1.MachinePool)
+
+	return Convert_v1alpha4_MachinePool_To_v1beta1_MachinePool(src, dst, nil)
+}
+
+func (dst *MachinePool) ConvertFrom(srcRaw conversion.Hub) error {
+	src := srcRaw.(*v1beta1.MachinePool)
+
+	return Convert_v1beta1_MachinePool_To_v1alpha4_MachinePool(src, dst, nil)
+}
+
+func (src *MachinePoolList) ConvertTo(dstRaw conversion.Hub) error {
+	dst := dstRaw.(*v1beta1.MachinePoolList)
+
+	return Convert_v1alpha4_MachinePoolList_To_v1beta1_MachinePoolList(src, dst, nil)
+}
+
+func (dst *MachinePoolList) ConvertFrom(srcRaw conversion.Hub) error {
+	src := srcRaw.(*v1beta1.MachinePoolList)
+
+	return Convert_v1beta1_MachinePoolList_To_v1alpha4_MachinePoolList(src, dst, nil)
+}

exp/api/v1alpha4/conversion_test.go

@@ -0,0 +1,33 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1alpha4
+
+import (
+	"testing"
+
+	"k8s.io/apimachinery/pkg/api/apitesting/fuzzer"
+	clusterv1exp "sigs.k8s.io/cluster-api/exp/api/v1beta1"
+	utilconversion "sigs.k8s.io/cluster-api/util/conversion"
+)
+
+func TestFuzzyConversion(t *testing.T) {
+	t.Run("for MachinePool", utilconversion.FuzzTestFunc(utilconversion.FuzzTestFuncInput{
+		Hub:         &clusterv1exp.MachinePool{},
+		Spoke:       &MachinePool{},
+		FuzzerFuncs: []fuzzer.FuzzerFuncs{},
+	}))
+}

exp/api/v1beta1/conversion.go

@@ -0,0 +1,20 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package v1beta1
+
+func (*MachinePool) Hub()     {}
+func (*MachinePoolList) Hub() {}