forked from rook/rook
135 lines
4.9 KiB
Go
135 lines
4.9 KiB
Go
/*
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Copyright 2016 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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// Package mds to manage a rook file system.
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package file
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import (
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"reflect"
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"github.com/coreos/pkg/capnslog"
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opkit "github.com/rook/operator-kit"
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rookalpha "github.com/rook/rook/pkg/apis/rook.io/v1alpha1"
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"github.com/rook/rook/pkg/clusterd"
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mds "github.com/rook/rook/pkg/operator/file/ceph"
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apiextensionsv1beta1 "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1beta1"
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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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var logger = capnslog.NewPackageLogger("github.com/rook/rook", "op-file")
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// FilesystemResource represents the file system custom resource
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var FilesystemResource = opkit.CustomResource{
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Name: "filesystem",
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Plural: "filesystems",
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Group: rookalpha.CustomResourceGroup,
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Version: rookalpha.Version,
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Scope: apiextensionsv1beta1.NamespaceScoped,
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Kind: reflect.TypeOf(rookalpha.Filesystem{}).Name(),
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}
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// FilesystemController represents a controller for file system custom resources
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type FilesystemController struct {
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context *clusterd.Context
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rookImage string
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hostNetwork bool
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ownerRef metav1.OwnerReference
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}
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// NewFilesystemController create controller for watching file system custom resources created
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func NewFilesystemController(context *clusterd.Context, rookImage string, hostNetwork bool, ownerRef metav1.OwnerReference) *FilesystemController {
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return &FilesystemController{
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context: context,
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rookImage: rookImage,
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hostNetwork: hostNetwork,
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ownerRef: ownerRef,
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}
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}
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// StartWatch watches for instances of Filesystem custom resources and acts on them
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func (c *FilesystemController) StartWatch(namespace string, 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 filesystem resource in namespace %s", namespace)
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watcher := opkit.NewWatcher(FilesystemResource, namespace, resourceHandlerFuncs, c.context.RookClientset.Rook().RESTClient())
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go watcher.Watch(&rookalpha.Filesystem{}, stopCh)
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return nil
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}
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func (c *FilesystemController) onAdd(obj interface{}) {
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filesystem := obj.(*rookalpha.Filesystem).DeepCopy()
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err := mds.CreateFilesystem(c.context, *filesystem, c.rookImage, c.hostNetwork, c.filesystemOwners(filesystem))
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if err != nil {
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logger.Errorf("failed to create file system %s. %+v", filesystem.Name, err)
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}
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}
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func (c *FilesystemController) onUpdate(oldObj, newObj interface{}) {
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oldFS := oldObj.(*rookalpha.Filesystem)
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newFS := newObj.(*rookalpha.Filesystem)
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if !filesystemChanged(oldFS.Spec, newFS.Spec) {
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logger.Debugf("filesystem %s not updated", newFS.Name)
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return
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}
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// if the file system is modified, allow the file system to be created if it wasn't already
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logger.Infof("updating filesystem %s", newFS)
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err := mds.CreateFilesystem(c.context, *newFS, c.rookImage, c.hostNetwork, c.filesystemOwners(newFS))
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if err != nil {
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logger.Errorf("failed to create (modify) file system %s. %+v", newFS.Name, err)
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}
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}
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func (c *FilesystemController) onDelete(obj interface{}) {
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filesystem := obj.(*rookalpha.Filesystem)
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err := mds.DeleteFilesystem(c.context, *filesystem)
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if err != nil {
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logger.Errorf("failed to delete file system %s. %+v", filesystem.Name, err)
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}
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}
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func (c *FilesystemController) filesystemOwners(fs *rookalpha.Filesystem) []metav1.OwnerReference {
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// Only set the cluster crd as the owner of the filesystem resources.
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// If the filesystem crd is deleted, the operator will explicitly remove the filesystem resources.
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// If the filesystem crd still exists when the cluster crd is deleted, this will make sure the filesystem
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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 filesystemChanged(oldFS, newFS rookalpha.FilesystemSpec) bool {
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if len(oldFS.DataPools) != len(newFS.DataPools) {
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logger.Infof("number of data pools changed from %d to %d", len(oldFS.DataPools), len(newFS.DataPools))
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return true
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}
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if oldFS.MetadataServer.ActiveCount != newFS.MetadataServer.ActiveCount {
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logger.Infof("number of mds active changed from %d to %d", oldFS.MetadataServer.ActiveCount, newFS.MetadataServer.ActiveCount)
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return true
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}
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if oldFS.MetadataServer.ActiveStandby != newFS.MetadataServer.ActiveStandby {
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logger.Infof("mds active standby changed from %t to %t", oldFS.MetadataServer.ActiveStandby, newFS.MetadataServer.ActiveStandby)
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return true
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}
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return false
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}
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