package controllers import ( "context" "encoding/json" "fmt" seaweedv1 "github.com/seaweedfs/seaweedfs-operator/api/v1" appsv1 "k8s.io/api/apps/v1" corev1 "k8s.io/api/core/v1" extensionsv1beta1 "k8s.io/api/extensions/v1beta1" apiequality "k8s.io/apimachinery/pkg/api/equality" "k8s.io/apimachinery/pkg/api/errors" metav1 "k8s.io/apimachinery/pkg/apis/meta/v1" "k8s.io/apimachinery/pkg/runtime" "k8s.io/apimachinery/pkg/runtime/schema" "k8s.io/apimachinery/pkg/util/intstr" "k8s.io/client-go/kubernetes/scheme" "k8s.io/klog" "sigs.k8s.io/controller-runtime/pkg/client" ) // svcName is the backend service name func createIngress(seaweedCR *seaweedv1.Seaweed, svcName string, port int) *extensionsv1beta1.Ingress { ingressLabel := map[string]string{"app": "seaweedfs", "role": "ingress", "name": svcName} ingress := &extensionsv1beta1.Ingress{ ObjectMeta: metav1.ObjectMeta{ Name: svcName + "-ingress", Namespace: seaweedCR.Namespace, Labels: ingressLabel, }, Spec: extensionsv1beta1.IngressSpec{ Rules: []extensionsv1beta1.IngressRule{}, }, } for _, host := range seaweedCR.Spec.Hosts { rule := extensionsv1beta1.IngressRule{ Host: host, IngressRuleValue: extensionsv1beta1.IngressRuleValue{ HTTP: &extensionsv1beta1.HTTPIngressRuleValue{ Paths: []extensionsv1beta1.HTTPIngressPath{ { Path: "/", Backend: extensionsv1beta1.IngressBackend{ ServiceName: svcName, ServicePort: intstr.FromInt(port), }, }, }, }, }, } ingress.Spec.Rules = append(ingress.Spec.Rules, rule) } return ingress } // the following is adapted from tidb-operator/pkg/controller/generic_control.go const ( // LastAppliedPodTemplate is annotation key of the last applied pod template LastAppliedPodTemplate = "seaweedfs.com/last-applied-podtemplate" // LastAppliedConfigAnnotation is annotation key of last applied configuration LastAppliedConfigAnnotation = "seaweedfs.com/last-applied-configuration" ) type MergeFn func(existing, desired runtime.Object) error // CreateOrUpdate create an object to the Kubernetes cluster for controller, if the object to create is existed, // call mergeFn to merge the change in new object to the existing object, then update the existing object. // The object will also be adopted by the given controller. func (r *SeaweedReconciler) CreateOrUpdate(obj runtime.Object, mergeFn MergeFn) (runtime.Object, error) { // controller-runtime/client will mutate the object pointer in-place, // to be consistent with other methods in our controller, we copy the object // to avoid the in-place mutation here and hereafter. desired := obj.DeepCopyObject() // 1. try to create and see if there is any conflicts err := r.Create(context.TODO(), desired) if errors.IsAlreadyExists(err) { // 2. object has already existed, merge our desired changes to it existing, err := EmptyClone(obj) if err != nil { return nil, err } key, err := client.ObjectKeyFromObject(existing) if err != nil { return nil, err } err = r.Get(context.TODO(), key, existing) if err != nil { return nil, err } mutated := existing.DeepCopyObject() // 4. invoke mergeFn to mutate a copy of the existing object if err := mergeFn(mutated, desired); err != nil { return nil, err } // 5. check if the copy is actually mutated if !apiequality.Semantic.DeepEqual(existing, mutated) { err := r.Update(context.TODO(), mutated) return mutated, err } return mutated, nil } return desired, err } func (r *SeaweedReconciler) addSpecToAnnotation(d *appsv1.Deployment) error { b, err := json.Marshal(d.Spec.Template.Spec) if err != nil { return err } if d.Annotations == nil { d.Annotations = map[string]string{} } d.Annotations[LastAppliedPodTemplate] = string(b) return nil } func (r *SeaweedReconciler) CreateOrUpdateDeployment(deploy *appsv1.Deployment) (*appsv1.Deployment, error) { r.addSpecToAnnotation(deploy) result, err := r.CreateOrUpdate(deploy, func(existing, desired runtime.Object) error { existingDep := existing.(*appsv1.Deployment) desiredDep := desired.(*appsv1.Deployment) existingDep.Spec.Replicas = desiredDep.Spec.Replicas existingDep.Labels = desiredDep.Labels if existingDep.Annotations == nil { existingDep.Annotations = map[string]string{} } for k, v := range desiredDep.Annotations { existingDep.Annotations[k] = v } // only override the default strategy if it is explicitly set in the desiredDep if string(desiredDep.Spec.Strategy.Type) != "" { existingDep.Spec.Strategy.Type = desiredDep.Spec.Strategy.Type if existingDep.Spec.Strategy.RollingUpdate != nil { existingDep.Spec.Strategy.RollingUpdate = desiredDep.Spec.Strategy.RollingUpdate } } // pod selector of deployment is immutable, so we don't mutate the labels of pod for k, v := range desiredDep.Spec.Template.Annotations { existingDep.Spec.Template.Annotations[k] = v } // podSpec of deployment is hard to merge, use an annotation to assist if DeploymentPodSpecChanged(desiredDep, existingDep) { // Record last applied spec in favor of future equality check b, err := json.Marshal(desiredDep.Spec.Template.Spec) if err != nil { return err } existingDep.Annotations[LastAppliedConfigAnnotation] = string(b) existingDep.Spec.Template.Spec = desiredDep.Spec.Template.Spec } return nil }) if err != nil { return nil, err } return result.(*appsv1.Deployment), err } func (r *SeaweedReconciler) CreateOrUpdateService(svc *corev1.Service) (*corev1.Service, error) { result, err := r.CreateOrUpdate(svc, func(existing, desired runtime.Object) error { existingSvc := existing.(*corev1.Service) desiredSvc := desired.(*corev1.Service) if existingSvc.Annotations == nil { existingSvc.Annotations = map[string]string{} } for k, v := range desiredSvc.Annotations { existingSvc.Annotations[k] = v } existingSvc.Labels = desiredSvc.Labels equal, err := ServiceEqual(desiredSvc, existingSvc) if err != nil { return err } if !equal { // record desiredSvc Spec in annotations in favor of future equality checks b, err := json.Marshal(desiredSvc.Spec) if err != nil { return err } existingSvc.Annotations[LastAppliedConfigAnnotation] = string(b) clusterIp := existingSvc.Spec.ClusterIP ports := existingSvc.Spec.Ports serviceType := existingSvc.Spec.Type existingSvc.Spec = desiredSvc.Spec existingSvc.Spec.ClusterIP = clusterIp // If the existed service and the desired service is NodePort or LoadBalancerType, we should keep the nodePort unchanged. if (serviceType == corev1.ServiceTypeNodePort || serviceType == corev1.ServiceTypeLoadBalancer) && (desiredSvc.Spec.Type == corev1.ServiceTypeNodePort || desiredSvc.Spec.Type == corev1.ServiceTypeLoadBalancer) { for i, dport := range existingSvc.Spec.Ports { for _, eport := range ports { // Because the portName could be edited, // we use Port number to link the desired Service Port and the existed Service Port in the nested loop if dport.Port == eport.Port && dport.Protocol == eport.Protocol { dport.NodePort = eport.NodePort existingSvc.Spec.Ports[i] = dport break } } } } } return nil }) if err != nil { return nil, err } return result.(*corev1.Service), nil } func (r *SeaweedReconciler) CreateOrUpdateIngress(ingress *extensionsv1beta1.Ingress) (*extensionsv1beta1.Ingress, error) { result, err := r.CreateOrUpdate(ingress, func(existing, desired runtime.Object) error { existingIngress := existing.(*extensionsv1beta1.Ingress) desiredIngress := desired.(*extensionsv1beta1.Ingress) if existingIngress.Annotations == nil { existingIngress.Annotations = map[string]string{} } for k, v := range desiredIngress.Annotations { existingIngress.Annotations[k] = v } existingIngress.Labels = desiredIngress.Labels equal, err := IngressEqual(desiredIngress, existingIngress) if err != nil { return err } if !equal { // record desiredIngress Spec in annotations in favor of future equality checks b, err := json.Marshal(desiredIngress.Spec) if err != nil { return err } existingIngress.Annotations[LastAppliedConfigAnnotation] = string(b) existingIngress.Spec = desiredIngress.Spec } return nil }) if err != nil { return nil, err } return result.(*extensionsv1beta1.Ingress), nil } // EmptyClone create an clone of the resource with the same name and namespace (if namespace-scoped), with other fields unset func EmptyClone(obj runtime.Object) (runtime.Object, error) { meta, ok := obj.(metav1.Object) if !ok { return nil, fmt.Errorf("Obj %v is not a metav1.Object, cannot call EmptyClone", obj) } gvk, err := InferObjectKind(obj) if err != nil { return nil, err } inst, err := scheme.Scheme.New(gvk) if err != nil { return nil, err } instMeta, ok := inst.(metav1.Object) if !ok { return nil, fmt.Errorf("New instatnce %v created from scheme is not a metav1.Object, EmptyClone failed", inst) } instMeta.SetName(meta.GetName()) instMeta.SetNamespace(meta.GetNamespace()) return inst, nil } // InferObjectKind infers the object kind func InferObjectKind(obj runtime.Object) (schema.GroupVersionKind, error) { gvks, _, err := scheme.Scheme.ObjectKinds(obj) if err != nil { return schema.GroupVersionKind{}, err } if len(gvks) != 1 { return schema.GroupVersionKind{}, fmt.Errorf("Object %v has ambigious GVK", obj) } return gvks[0], nil } // GetDeploymentLastAppliedPodTemplate set last applied pod template from Deployment's annotation func GetDeploymentLastAppliedPodTemplate(dep *appsv1.Deployment) (*corev1.PodSpec, error) { applied, ok := dep.Annotations[LastAppliedPodTemplate] if !ok { return nil, fmt.Errorf("deployment:[%s/%s] not found spec's apply config", dep.GetNamespace(), dep.GetName()) } podSpec := &corev1.PodSpec{} err := json.Unmarshal([]byte(applied), podSpec) if err != nil { return nil, err } return podSpec, nil } // DeploymentPodSpecChanged checks whether the new deployment differs with the old one's last-applied-config func DeploymentPodSpecChanged(newDep *appsv1.Deployment, oldDep *appsv1.Deployment) bool { lastAppliedPodTemplate, err := GetDeploymentLastAppliedPodTemplate(oldDep) if err != nil { klog.Warningf("error get last-applied-config of deployment %s/%s: %v", oldDep.Namespace, oldDep.Name, err) return true } return !apiequality.Semantic.DeepEqual(newDep.Spec.Template.Spec, lastAppliedPodTemplate) } // ServiceEqual compares the new Service's spec with old Service's last applied config func ServiceEqual(newSvc, oldSvc *corev1.Service) (bool, error) { oldSpec := corev1.ServiceSpec{} if lastAppliedConfig, ok := oldSvc.Annotations[LastAppliedConfigAnnotation]; ok { err := json.Unmarshal([]byte(lastAppliedConfig), &oldSpec) if err != nil { klog.Errorf("unmarshal ServiceSpec: [%s/%s]'s applied config failed,error: %v", oldSvc.GetNamespace(), oldSvc.GetName(), err) return false, err } return apiequality.Semantic.DeepEqual(oldSpec, newSvc.Spec), nil } return false, nil } func IngressEqual(newIngress, oldIngres *extensionsv1beta1.Ingress) (bool, error) { oldIngressSpec := extensionsv1beta1.IngressSpec{} if lastAppliedConfig, ok := oldIngres.Annotations[LastAppliedConfigAnnotation]; ok { err := json.Unmarshal([]byte(lastAppliedConfig), &oldIngressSpec) if err != nil { klog.Errorf("unmarshal IngressSpec: [%s/%s]'s applied config failed,error: %v", oldIngres.GetNamespace(), oldIngres.GetName(), err) return false, err } return apiequality.Semantic.DeepEqual(oldIngressSpec, newIngress.Spec), nil } return false, nil }