77 lines
2.5 KiB
Go
77 lines
2.5 KiB
Go
/*
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Copyright 2018 The Kubernetes Authors.
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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 util
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import (
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"fmt"
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"reflect"
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"sort"
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"strings"
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"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
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fedv1a1 "sigs.k8s.io/kubefed/pkg/apis/core/v1alpha1"
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)
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const (
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generationPrefix = "gen:"
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resourceVersionPrefix = "rv:"
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)
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// ObjectVersion retrieves the field type-prefixed value used for
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// determining currency of the given cluster object.
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func ObjectVersion(clusterObj *unstructured.Unstructured) string {
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generation := clusterObj.GetGeneration()
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if generation != 0 {
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return fmt.Sprintf("%s%d", generationPrefix, generation)
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}
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return fmt.Sprintf("%s%s", resourceVersionPrefix, clusterObj.GetResourceVersion())
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}
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// ObjectNeedsUpdate determines whether the 2 objects provided cluster
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// object needs to be updated according to the desired object and the
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// recorded version.
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func ObjectNeedsUpdate(desiredObj, clusterObj *unstructured.Unstructured, recordedVersion string) bool {
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targetVersion := ObjectVersion(clusterObj)
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if recordedVersion != targetVersion {
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return true
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}
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// If versions match and the version is sourced from the
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// generation field, a further check of metadata equivalency is
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// required.
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return strings.HasPrefix(targetVersion, generationPrefix) && !ObjectMetaObjEquivalent(desiredObj, clusterObj)
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}
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// SortClusterVersions ASCII sorts the given cluster versions slice
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// based on cluster name.
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func SortClusterVersions(versions []fedv1a1.ClusterObjectVersion) {
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sort.Slice(versions, func(i, j int) bool {
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return versions[i].ClusterName < versions[j].ClusterName
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})
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}
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// PropagatedVersionStatusEquivalent returns true if both statuses are equal by
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// comparing Template and Override version, and their ClusterVersion slices;
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// false otherwise.
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func PropagatedVersionStatusEquivalent(pvs1, pvs2 *fedv1a1.PropagatedVersionStatus) bool {
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return pvs1.TemplateVersion == pvs2.TemplateVersion &&
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pvs1.OverrideVersion == pvs2.OverrideVersion &&
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reflect.DeepEqual(pvs1.ClusterVersions, pvs2.ClusterVersions)
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}
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