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IPAM: IP support for creating associated SVC
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,133 @@ | ||
| // Copyright 2019-2023 The Liqo 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 ipctrl | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| v1 "k8s.io/api/core/v1" | ||
| discoveryv1 "k8s.io/api/discovery/v1" | ||
| apierrors "k8s.io/apimachinery/pkg/api/errors" | ||
| metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" | ||
| "k8s.io/apimachinery/pkg/labels" | ||
| "k8s.io/apimachinery/pkg/types" | ||
| "k8s.io/klog/v2" | ||
| "k8s.io/utils/pointer" | ||
| "sigs.k8s.io/controller-runtime/pkg/client" | ||
| "sigs.k8s.io/controller-runtime/pkg/controller/controllerutil" | ||
|
|
||
| ipamv1alpha1 "github.com/liqotech/liqo/apis/ipam/v1alpha1" | ||
| ) | ||
|
|
||
| // handleAssociatedService creates, updates or deletes the service associated to the IP. | ||
| func (r *IPReconciler) handleAssociatedService(ctx context.Context, ip *ipamv1alpha1.IP) error { | ||
| // Service associated to the IP | ||
| svc := v1.Service{ObjectMeta: metav1.ObjectMeta{ | ||
| Name: ip.Name, | ||
| Namespace: ip.Namespace, | ||
| }} | ||
| svcMutateFn := func() error { | ||
| svc.Spec = ip.Spec.ServiceTemplate.Spec | ||
| return controllerutil.SetControllerReference(ip, &svc, r.Scheme) | ||
| } | ||
|
|
||
| // EndpointSlice associated to the Service | ||
| eps := discoveryv1.EndpointSlice{ObjectMeta: metav1.ObjectMeta{ | ||
| Name: ip.Name, | ||
| Namespace: ip.Namespace, | ||
| }} | ||
| epsMutateFn := func() error { | ||
| eps.ObjectMeta.Labels = labels.Merge(eps.GetLabels(), | ||
| map[string]string{ | ||
| discoveryv1.LabelServiceName: ip.Name, | ||
| LabelVKSkipUnmapIP: "true", | ||
| }, | ||
| ) | ||
| eps.AddressType = discoveryv1.AddressTypeIPv4 | ||
| eps.Endpoints = []discoveryv1.Endpoint{ | ||
| { | ||
| Addresses: []string{ip.Spec.IP}, | ||
| Conditions: discoveryv1.EndpointConditions{ | ||
| Ready: pointer.Bool(true), | ||
| }, | ||
| // NodeName: pointer.String("external"), // must not be nil, otherwise the endpoint is not reflected by the VK | ||
| }, | ||
| } | ||
| eps.Ports = []discoveryv1.EndpointPort{ | ||
| { | ||
| Name: &ip.Spec.ServiceTemplate.Spec.Ports[0].Name, | ||
| Protocol: &ip.Spec.ServiceTemplate.Spec.Ports[0].Protocol, | ||
| Port: &ip.Spec.ServiceTemplate.Spec.Ports[0].Port, | ||
| AppProtocol: ip.Spec.ServiceTemplate.Spec.Ports[0].AppProtocol, | ||
| }, | ||
| } | ||
| return controllerutil.SetControllerReference(ip, &eps, r.Scheme) | ||
| } | ||
|
|
||
| // Create service and endpointslice if the template is defined | ||
| if ip.Spec.ServiceTemplate != nil { | ||
| if err := ensureResource(ctx, r.Client, &svc, svcMutateFn); err != nil { | ||
| return err | ||
| } | ||
| if err := ensureResource(ctx, r.Client, &eps, epsMutateFn); err != nil { | ||
| return err | ||
| } | ||
| } else { | ||
| // Service spec is not defined, delete the associated service and endpointslices if previously created | ||
| if err := ensureResourceAbsence(ctx, r.Client, &svc); err != nil { | ||
| return err | ||
| } | ||
| if err := ensureResourceAbsence(ctx, r.Client, &eps); err != nil { | ||
| return err | ||
| } | ||
| } | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| // ensureResource ensures that the given resource exists. | ||
| // It either creates or update the resource. | ||
| func ensureResource(ctx context.Context, r client.Client, obj client.Object, mutateFn controllerutil.MutateFn) error { | ||
| resourceKind := obj.GetObjectKind().GroupVersionKind().Kind | ||
| op, err := controllerutil.CreateOrUpdate(ctx, r, obj, mutateFn) | ||
| if err != nil { | ||
| klog.Errorf("error while creating/updating %s %q (operation: %s): %v", resourceKind, obj.GetName(), op, err) | ||
| return err | ||
| } | ||
| klog.Infof("%s %q correctly enforced (operation: %s)", resourceKind, obj.GetName(), op) | ||
| return nil | ||
| } | ||
|
|
||
| // ensureResourceAbsence ensures that the given resource does not exist. | ||
| // If the resource does not exist, it does nothing. | ||
| func ensureResourceAbsence(ctx context.Context, r client.Client, obj client.Object) error { | ||
| resourceKind := obj.GetObjectKind().GroupVersionKind().Kind | ||
| err := r.Get(ctx, types.NamespacedName{Name: obj.GetName(), Namespace: obj.GetNamespace()}, obj) | ||
| switch { | ||
| case err != nil && !apierrors.IsNotFound(err): | ||
| klog.Errorf("error while getting %s %q: %v", resourceKind, obj.GetName(), err) | ||
| return err | ||
| case apierrors.IsNotFound(err): | ||
| // The resource does not exist, do nothing. | ||
| klog.V(6).Infof("%s %q does not exist. Nothing to do", resourceKind, obj.GetName()) | ||
| default: | ||
| if err := r.Delete(ctx, obj); err != nil { | ||
| klog.Errorf("error while deleting %s %q: %v", resourceKind, obj.GetName(), err) | ||
| return err | ||
| } | ||
| klog.Infof("%s %q correctly deleted", resourceKind, obj.GetName()) | ||
| } | ||
| return nil | ||
| } |
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