forked from rook/rook
230 lines
6.9 KiB
Go
230 lines
6.9 KiB
Go
/*
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Copyright 2019 The Rook Authors. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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// scale-out, multi-cloud NFS
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package nfs
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import (
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"fmt"
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"reflect"
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"github.com/coreos/pkg/capnslog"
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"github.com/google/go-cmp/cmp"
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opkit "github.com/rook/operator-kit"
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edgefsv1 "github.com/rook/rook/pkg/apis/edgefs.rook.io/v1"
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rookalpha "github.com/rook/rook/pkg/apis/rook.io/v1alpha2"
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"github.com/rook/rook/pkg/clusterd"
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v1 "k8s.io/api/core/v1"
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apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
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"k8s.io/apimachinery/pkg/api/resource"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/client-go/tools/cache"
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)
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const (
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customResourceName = "nfs"
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customResourceNamePlural = "nfss"
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)
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var logger = capnslog.NewPackageLogger("github.com/rook/rook", "edgefs-op-nfs")
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// NFSResource represents the nfs custom resource
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var NFSResource = opkit.CustomResource{
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Name: customResourceName,
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Plural: customResourceNamePlural,
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Group: edgefsv1.CustomResourceGroup,
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Version: edgefsv1.Version,
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Scope: apiextensionsv1beta1.NamespaceScoped,
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Kind: reflect.TypeOf(edgefsv1.NFS{}).Name(),
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}
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// NFSController represents a controller object for nfs custom resources
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type NFSController struct {
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context *clusterd.Context
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namespace string
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rookImage string
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NetworkSpec rookalpha.NetworkSpec
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dataDirHostPath string
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dataVolumeSize resource.Quantity
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annotations rookalpha.Annotations
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placement rookalpha.Placement
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resources v1.ResourceRequirements
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resourceProfile string
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ownerRef metav1.OwnerReference
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useHostLocalTime bool
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}
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// NewNFSController create controller for watching nfs custom resources created
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func NewNFSController(
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context *clusterd.Context,
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namespace string,
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rookImage string,
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NetworkSpec rookalpha.NetworkSpec,
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dataDirHostPath string,
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dataVolumeSize resource.Quantity,
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placement rookalpha.Placement,
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resources v1.ResourceRequirements,
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resourceProfile string,
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ownerRef metav1.OwnerReference,
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useHostLocalTime bool,
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) *NFSController {
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return &NFSController{
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context: context,
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namespace: namespace,
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rookImage: rookImage,
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NetworkSpec: NetworkSpec,
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dataDirHostPath: dataDirHostPath,
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dataVolumeSize: dataVolumeSize,
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placement: placement,
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resources: resources,
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resourceProfile: resourceProfile,
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ownerRef: ownerRef,
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useHostLocalTime: useHostLocalTime,
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}
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}
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// StartWatch watches for instances of NFS custom resources and acts on them
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func (c *NFSController) StartWatch(stopCh chan struct{}) error {
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resourceHandlerFuncs := cache.ResourceEventHandlerFuncs{
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AddFunc: c.onAdd,
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UpdateFunc: c.onUpdate,
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DeleteFunc: c.onDelete,
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}
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logger.Infof("start watching nfs resources in namespace %s", c.namespace)
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watcher := opkit.NewWatcher(NFSResource, c.namespace, resourceHandlerFuncs, c.context.RookClientset.EdgefsV1().RESTClient())
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go watcher.Watch(&edgefsv1.NFS{}, stopCh)
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return nil
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}
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func (c *NFSController) onAdd(obj interface{}) {
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nfs, err := getNFSObject(obj)
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if err != nil {
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logger.Errorf("failed to get nfs object: %+v", err)
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return
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}
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if err = c.CreateService(*nfs, c.serviceOwners(nfs)); err != nil {
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logger.Errorf("failed to create nfs %s. %+v", nfs.Name, err)
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}
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}
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func (c *NFSController) onUpdate(oldObj, newObj interface{}) {
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oldService, err := getNFSObject(oldObj)
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if err != nil {
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logger.Errorf("failed to get old nfs object: %+v", err)
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return
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}
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newService, err := getNFSObject(newObj)
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if err != nil {
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logger.Errorf("failed to get new nfs object: %+v", err)
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return
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}
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if !serviceChanged(oldService.Spec, newService.Spec) {
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logger.Debugf("nfs %s did not change", newService.Name)
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return
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}
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logger.Infof("applying nfs %s changes", newService.Name)
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if err = c.UpdateService(*newService, c.serviceOwners(newService)); err != nil {
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logger.Errorf("failed to create (modify) nfs %s. %+v", newService.Name, err)
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}
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}
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func (c *NFSController) onDelete(obj interface{}) {
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nfs, err := getNFSObject(obj)
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if err != nil {
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logger.Errorf("failed to get nfs object: %+v", err)
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return
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}
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if err = c.DeleteService(*nfs); err != nil {
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logger.Errorf("failed to delete nfs %s. %+v", nfs.Name, err)
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}
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}
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func (c *NFSController) ParentClusterChanged(cluster edgefsv1.ClusterSpec) {
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if c.rookImage == cluster.EdgefsImageName {
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logger.Infof("No need to update the nfs service, the same images present")
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return
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}
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// update controller options by updated cluster spec
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c.rookImage = cluster.EdgefsImageName
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nfses, err := c.context.RookClientset.EdgefsV1().NFSs(c.namespace).List(metav1.ListOptions{})
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if err != nil {
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logger.Errorf("failed to retrieve NFSes to update the Edgefs version. %+v", err)
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return
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}
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for _, nfs := range nfses.Items {
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logger.Infof("updating the Edgefs version for nfs %s to %s", nfs.Name, cluster.EdgefsImageName)
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err := c.UpdateService(nfs, nil)
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if err != nil {
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logger.Errorf("failed to update nfs %s. %+v", nfs.Name, err)
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} else {
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logger.Infof("updated nfs %s to Edgefs version %s", nfs.Name, cluster.EdgefsImageName)
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}
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}
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}
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func (c *NFSController) serviceOwners(service *edgefsv1.NFS) []metav1.OwnerReference {
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// Only set the cluster crd as the owner of the NFS resources.
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// If the NFS crd is deleted, the operator will explicitly remove the NFS resources.
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// If the NFS crd still exists when the cluster crd is deleted, this will make sure the NFS
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// resources are cleaned up.
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return []metav1.OwnerReference{c.ownerRef}
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}
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func serviceChanged(oldService, newService edgefsv1.NFSSpec) bool {
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var diff string
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// any change in the crd will trigger an orchestration
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if !reflect.DeepEqual(oldService, newService) {
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func() {
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defer func() {
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if err := recover(); err != nil {
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logger.Warningf("Encountered an issue getting nfs service change differences: %v", err)
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}
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}()
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// resource.Quantity has non-exportable fields, so we use its comparator method
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resourceQtyComparer := cmp.Comparer(func(x, y resource.Quantity) bool { return x.Cmp(y) == 0 })
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diff = cmp.Diff(oldService, newService, resourceQtyComparer)
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logger.Infof("The NFS Service has changed. diff=%s", diff)
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}()
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}
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if len(diff) > 0 {
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return true
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}
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return false
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}
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func getNFSObject(obj interface{}) (nfs *edgefsv1.NFS, err error) {
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var ok bool
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nfs, ok = obj.(*edgefsv1.NFS)
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if ok {
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// the nfs object is of the latest type, simply return it
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return nfs.DeepCopy(), nil
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}
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return nil, fmt.Errorf("not a known nfs object: %+v", obj)
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}
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