chore(hooks): impl discovery clusterip service for dvcr in go (#1005)

Implement discovery clusterip service for dvcr hook in go
---------
Signed-off-by: Yaroslav Borbat <[email protected]>

Author: yaroslavborbat

hooks/discovery_clusterip_service_for_dvcr.py

@@ -0,0 +1,93 @@
+/*
+Copyright 2025 Flant JSC
+
+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 main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/deckhouse/module-sdk/pkg"
+	"github.com/deckhouse/module-sdk/pkg/app"
+	"github.com/deckhouse/module-sdk/pkg/registry"
+	"k8s.io/utils/ptr"
+
+	"hooks/pkg/common"
+)
+
+const (
+	discoveryService = "discovery-service"
+	serviceName      = "dvcr"
+
+	serviceIPValuePath = "virtualization.internal.dvcr.serviceIP"
+)
+
+var _ = registry.RegisterFunc(configDiscoveryService, handleDiscoveryService)
+
+var configDiscoveryService = &pkg.HookConfig{
+	OnBeforeHelm: &pkg.OrderedConfig{Order: 5},
+	Kubernetes: []pkg.KubernetesConfig{
+		{
+			Name:       discoveryService,
+			APIVersion: "v1",
+			Kind:       "Service",
+			JqFilter:   ".spec.clusterIP",
+
+			NameSelector: &pkg.NameSelector{
+				MatchNames: []string{serviceName},
+			},
+
+			NamespaceSelector: &pkg.NamespaceSelector{
+				NameSelector: &pkg.NameSelector{
+					MatchNames: []string{common.MODULE_NAMESPACE},
+				},
+			},
+
+			ExecuteHookOnSynchronization: ptr.To(false),
+		},
+	},
+
+	Queue: fmt.Sprintf("modules/%s", common.MODULE_NAME),
+}
+
+func handleDiscoveryService(_ context.Context, input *pkg.HookInput) error {
+	clusterIP := getClusterIP(input)
+
+	if clusterIP == "" {
+		input.Logger.Info(fmt.Sprintf("ClusterIP of service dvcr not found. Delete value from %s", serviceIPValuePath))
+		input.Values.Remove(serviceIPValuePath)
+		return nil
+	}
+
+	oldClusterIP := input.Values.Get(serviceIPValuePath).String()
+	if clusterIP != oldClusterIP {
+		input.Logger.Info(fmt.Sprintf("Set ip %s to %s", clusterIP, serviceIPValuePath))
+		input.Values.Set(serviceIPValuePath, clusterIP)
+	}
+	return nil
+}
+
+func getClusterIP(input *pkg.HookInput) string {
+	snapshots := input.Snapshots.Get(discoveryService)
+	if len(snapshots) > 0 {
+		return snapshots[0].String()
+	}
+	return ""
+}
+
+func main() {
+	app.Run()
+}

hooks/test_discovery_clusterip_service_for_dvcr.py

@@ -0,0 +1,91 @@
+/*
+Copyright 2025 Flant JSC
+
+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 main
+
+import (
+	"context"
+	"testing"
+
+	"github.com/deckhouse/deckhouse/pkg/log"
+	"github.com/deckhouse/module-sdk/pkg"
+	"github.com/deckhouse/module-sdk/testing/mock"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	"github.com/tidwall/gjson"
+)
+
+func TestDiscoveryClusterIPServiceForDVCR(t *testing.T) {
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "DiscoveryClusterIPServiceForDVCR Suite")
+}
+
+var _ = Describe("DiscoveryClusterIPServiceForDVCR", func() {
+	var (
+		dc        *mock.DependencyContainerMock
+		snapshots *mock.SnapshotsMock
+		values    *mock.PatchableValuesCollectorMock
+	)
+
+	BeforeEach(func() {
+		dc = mock.NewDependencyContainerMock(GinkgoT())
+		snapshots = mock.NewSnapshotsMock(GinkgoT())
+		values = mock.NewPatchableValuesCollectorMock(GinkgoT())
+	})
+
+	AfterEach(func() {
+		dc = nil
+		snapshots = nil
+		values = nil
+	})
+
+	setSnapshots := func(snaps ...pkg.Snapshot) {
+		snapshots.GetMock.When(discoveryService).Then(snaps)
+	}
+
+	newSnapshot := func(clusterIP string) pkg.Snapshot {
+		return mock.NewSnapshotMock(GinkgoT()).StringMock.Set(func() (s1 string) {
+			return clusterIP
+		})
+	}
+
+	newInput := func() *pkg.HookInput {
+		return &pkg.HookInput{
+			Snapshots: snapshots,
+			Values:    values,
+			DC:        dc,
+			Logger:    log.NewNop(),
+		}
+	}
+
+	It("should set serviceIP to values", func() {
+		setSnapshots(newSnapshot("10.0.0.1"))
+		values.GetMock.When(serviceIPValuePath).Then(gjson.Result{Type: gjson.String, Str: ""})
+		values.SetMock.Set(func(path string, v any) {
+			Expect(path).To(Equal(serviceIPValuePath))
+			Expect(v).To(Equal("10.0.0.1"))
+		})
+		Expect(handleDiscoveryService(context.Background(), newInput())).To(Succeed())
+	})
+
+	It("Should delete serviceIP from values", func() {
+		setSnapshots(newSnapshot(""))
+		values.RemoveMock.Set(func(path string) {
+			Expect(path).To(Equal(serviceIPValuePath))
+		})
+		Expect(handleDiscoveryService(context.Background(), newInput())).To(Succeed())
+	})
+})

images/hooks/cmd/discovery-clusterip-service-for-dvcr/main.go

@@ -33,3 +33,4 @@ shell:
 {{- end }}
   - go build -ldflags="-s -w" -o /hooks/prevent-default-vmclasses-deletion ./cmd/prevent-default-vmclasses-deletion
   - go build -ldflags="-s -w" -o /hooks/generate-secret-for-dvcr ./cmd/generate-secret-for-dvcr
+  - go build -ldflags="-s -w" -o /hooks/discovery-clusterip-service-for-dvcr ./cmd/discovery-clusterip-service-for-dvcr