Eng Zer Jun
77bff6a07c
From the Go specification [1]: "1. For a nil slice, the number of iterations is 0." "3. If the map is nil, the number of iterations is 0." `len` returns 0 if the slice or map is nil [2]. Therefore, checking `len(v) > 0` before a loop is unnecessary. [1]: https://go.dev/ref/spec#For_range [2]: https://pkg.go.dev/builtin#len Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>
87 lines
2.5 KiB
Go
87 lines
2.5 KiB
Go
/*
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Copyright 2021 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 cluster
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import (
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"context"
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"strings"
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"github.com/pkg/errors"
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cephv1 "github.com/rook/rook/pkg/apis/ceph.rook.io/v1"
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"github.com/rook/rook/pkg/clusterd"
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"github.com/rook/rook/pkg/util"
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"github.com/rook/rook/pkg/util/dependents"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"sigs.k8s.io/controller-runtime/pkg/client"
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)
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var (
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// must use plural kinds
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cephClusterDependentListKinds []string = []string{
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"CephBlockPoolList",
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"CephRBDMirrorList",
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"CephFilesystemList",
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"CephFilesystemMirrorList",
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"CephObjectStoreList",
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"CephObjectStoreUserList",
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"CephObjectZoneList",
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"CephObjectZoneGroupList",
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"CephObjectRealmList",
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"CephNFSList",
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"CephClientList",
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"CephBucketTopic",
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"CephBucketNotification",
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"CephFilesystemSubVolumeGroup",
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"CephBlockPoolRadosNamespace",
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}
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)
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// CephClusterDependents returns a DependentList of dependents of a CephCluster in the namespace.
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func CephClusterDependents(c *clusterd.Context, namespace string) (*dependents.DependentList, error) {
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ctx := context.TODO()
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dependents := dependents.NewDependentList()
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errs := []error{}
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for _, listKind := range cephClusterDependentListKinds {
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list := &unstructured.UnstructuredList{}
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list.SetGroupVersionKind(schema.GroupVersionKind{
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Group: cephv1.SchemeGroupVersion.Group,
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Version: cephv1.SchemeGroupVersion.Version,
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Kind: listKind,
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})
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err := c.Client.List(ctx, list, client.InNamespace(namespace))
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if err != nil {
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errs = append(errs, errors.Wrapf(err, "failed to get %s", listKind))
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continue
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}
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for _, obj := range list.Items {
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dependents.Add(listKindToSingularKind(listKind), obj.GetName())
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}
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}
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// returns a nil error if there are no errors in the list
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outErr := util.AggregateErrors(errs, "failed to list some dependents for CephCluster in namespace %q", namespace)
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return dependents, outErr
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}
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func listKindToSingularKind(listKind string) string {
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return strings.TrimSuffix(listKind, "List")
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}
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