feat: support install corends to virtual cluster

Signed-off-by: baoyinghai_yewu <[email protected]>

.gitignore

@@ -36,4 +36,6 @@ cmd/kubenest/node-agent/cert.pem
 cmd/kubenest/node-agent/key.pem
 cmd/kubenest/node-agent/agent.env
 hack/k8s-in-k8s/nodes.txt
-develop
+develop
+
+cmd/kubenest/node-agent/app/client/app.log

deploy/crds/kosmos.io_kubenestconfigurations.yaml

@@ -77,6 +77,9 @@ spec:
                       type: string
                     type: array
                 type: object
+              useTenantDns:
+                default: false
+                type: boolean
             type: object
           kubeNestType:
             type: string

deploy/crds/kosmos.io_virtualclusters.yaml

@@ -95,6 +95,9 @@ spec:
                           type: string
                         type: array
                     type: object
+                  useTenantDns:
+                    default: false
+                    type: boolean
                 type: object
               kubeconfig:
                 description: Kubeconfig is the kubeconfig of the virtual kubernetes's

deploy/virtual-cluster-components-manifest-cm.yaml

@@ -5,6 +5,7 @@ data:
       {"name": "kube-proxy", "path": "/kosmos/manifest/kube-proxy/*.yaml"},
       {"name": "calico", "path": "/kosmos/manifest/calico/*.yaml"},
       {"name": "keepalived", "path": "/kosmos/manifest/keepalived/*.yaml"},
+      {"name": "core-dns-tenant", "path": "/kosmos/manifest/core-dns/tenant/*.yaml"},
     ]
   host-core-dns-components: |
     [

hack/k8s-in-k8s/g.env.sh

@@ -25,7 +25,7 @@ PATH_KUBELET_CONF=.
 KUBELET_CONFIG_NAME=
 HOST_CORE_DNS=10.96.0.10
 # kubeadm switch
-USE_KUBEADM=true
+USE_KUBEADM=false
 # Generate kubelet.conf TIMEOUT
 KUBELET_CONF_TIMEOUT=30
 

pkg/apis/kosmos/v1alpha1/kubenestconfiguration_types.go

@@ -85,6 +85,10 @@ type KubeInKubeConfig struct {
 	// +kubebuilder:default=hostNetwork
 	// +optional
 	ApiServerServiceType ApiServerServiceType `yaml:"apiServerServiceType" json:"apiServerServiceType,omitempty"`
+
+	// +kubebuilder:default=false
+	// +optional
+	UseTenantDns bool `yaml:"useTenantDns" json:"useTenantDns,omitempty"`
 }
 
 // TenantEntrypoint contains the configuration for the tenant entrypoint.

pkg/kubenest/constants/constant.go

@@ -124,9 +124,10 @@ const (
 	// core-dns
 	KubeDNSSVCName = "kube-dns"
 	// nolint
-	HostCoreDnsComponents    = "host-core-dns-components"
-	VirtualCoreDnsComponents = "virtual-core-dns-components"
-	PrometheusRuleManifest   = "prometheus-rules"
+	HostCoreDnsComponents      = "host-core-dns-components"
+	VirtualCoreDnsComponents   = "virtual-core-dns-components"
+	PrometheusRuleManifest     = "prometheus-rules"
+	TenantCoreDnsComponentName = "core-dns-tenant"
 
 	StateLabelKey = "kosmos-io/state"
 

pkg/kubenest/controller/endpoints.sync.controller/coredns_sync_controller.go

@@ -151,6 +151,10 @@ func (e *CoreDNSController) Reconcile(ctx context.Context, request reconcile.Req
 		return reconcile.Result{RequeueAfter: utils.DefaultRequeueTime}, nil
 	}
 
+	if targetVirtualCluster.Spec.KubeInKubeConfig != nil && targetVirtualCluster.Spec.KubeInKubeConfig.UseTenantDns {
+		return reconcile.Result{}, nil
+	}
+
 	// Get the corresponding svc
 	var kubesvc v1.Service
 	if err := e.Get(ctx, request.NamespacedName, &kubesvc); err != nil {

pkg/kubenest/tasks/coredns.go

@@ -28,6 +28,7 @@ func NewCoreDNSTask() workflow.Task {
 	return workflow.Task{
 		Name:        "coreDns",
 		Run:         runCoreDns,
+		Skip:        skipCoreDns,
 		RunSubTasks: true,
 		Tasks: []workflow.Task{
 			{
@@ -46,6 +47,19 @@ func NewCoreDNSTask() workflow.Task {
 	}
 }
 
+func skipCoreDns(d workflow.RunData) (bool, error) {
+	data, ok := d.(InitData)
+	if !ok {
+		return false, errors.New("coreDns task invoked with an invalid data struct")
+	}
+
+	vc := data.VirtualCluster()
+	if vc.Spec.KubeInKubeConfig != nil && vc.Spec.KubeInKubeConfig.UseTenantDns {
+		return true, nil
+	}
+	return false, nil
+}
+
 func runCoreDns(r workflow.RunData) error {
 	data, ok := r.(InitData)
 	if !ok {

pkg/kubenest/tasks/manifests_components.go

@@ -29,6 +29,11 @@ type ComponentConfig struct {
 	Path string `json:"path" yaml:"path"`
 }
 
+type SkipComponentCondition struct {
+	Condition     bool
+	ComponentName string
+}
+
 func NewComponentsFromManifestsTask() workflow.Task {
 	return workflow.Task{
 		Name:        "manifests-components",
@@ -53,6 +58,14 @@ func runComponentsFromManifests(r workflow.RunData) error {
 	return nil
 }
 
+func getSkipComponentsForVirtualCluster(condition []*SkipComponentCondition) map[string]bool {
+	skipComponents := map[string]bool{}
+	for _, c := range condition {
+		skipComponents[c.ComponentName] = c.Condition
+	}
+	return skipComponents
+}
+
 func applyComponentsManifests(r workflow.RunData) error {
 	data, ok := r.(InitData)
 	if !ok {
@@ -96,10 +109,24 @@ func applyComponentsManifests(r workflow.RunData) error {
 		templatedMapping["KeepalivedReplicas"] = keepalivedReplicas
 	}
 
+	UseTenantDns := data.VirtualCluster().Spec.KubeInKubeConfig != nil && data.VirtualCluster().Spec.KubeInKubeConfig.UseTenantDns
+
+	skipComponents := getSkipComponentsForVirtualCluster([]*SkipComponentCondition{
+		{
+			// skip coredns component if tenant dns is enabled
+			Condition:     !UseTenantDns,
+			ComponentName: constants.TenantCoreDnsComponentName,
+		}, {
+			// skip keepalived component if vip is not enabled
+			Condition:     !keepalivedEnable,
+			ComponentName: constants.VipKeepalivedComponentName,
+		},
+	})
+
 	for _, component := range components {
 		klog.V(2).Infof("Deploy component %s", component.Name)
-		// skip keepalived component if vip is not enabled
-		if !keepalivedEnable && component.Name == constants.VipKeepalivedComponentName {
+		if v, ok := skipComponents[component.Name]; ok && v {
+			klog.V(2).Infof("Deploy component %s skipped", component.Name)
 			continue
 		}
 		err = applyTemplatedManifests(component.Name, dynamicClient, component.Path, templatedMapping)