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util.go
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util.go
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// Copyright 2017 The Kubernetes Dashboard Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package deployment
import (
"github.com/kubernetes/dashboard/src/app/backend/resource/common"
"k8s.io/client-go/pkg/api/v1"
extensions "k8s.io/client-go/pkg/apis/extensions/v1beta1"
)
// Methods below are taken from kubernetes repo:
// https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/deployment/util/deployment_util.go
// FindNewReplicaSet returns the new RS this given deployment targets (the one with the same pod template).
func FindNewReplicaSet(deployment *extensions.Deployment, rsList []*extensions.ReplicaSet) (*extensions.ReplicaSet, error) {
newRSTemplate := GetNewReplicaSetTemplate(deployment)
for i := range rsList {
if common.EqualIgnoreHash(rsList[i].Spec.Template, newRSTemplate) {
// This is the new ReplicaSet.
return rsList[i], nil
}
}
// new ReplicaSet does not exist.
return nil, nil
}
// FindOldReplicaSets returns the old replica sets targeted by the given Deployment, with the given slice of RSes.
// Note that the first set of old replica sets doesn't include the ones with no pods, and the second set of old replica sets include all old replica sets.
func FindOldReplicaSets(deployment *extensions.Deployment, rsList []*extensions.ReplicaSet) ([]*extensions.ReplicaSet, []*extensions.ReplicaSet, error) {
var requiredRSs []*extensions.ReplicaSet
var allRSs []*extensions.ReplicaSet
newRS, err := FindNewReplicaSet(deployment, rsList)
if err != nil {
return nil, nil, err
}
for _, rs := range rsList {
// Filter out new replica set
if newRS != nil && rs.UID == newRS.UID {
continue
}
allRSs = append(allRSs, rs)
if *(rs.Spec.Replicas) != 0 {
requiredRSs = append(requiredRSs, rs)
}
}
return requiredRSs, allRSs, nil
}
// GetNewReplicaSetTemplate returns the desired PodTemplateSpec for the new ReplicaSet corresponding to the given ReplicaSet.
// Callers of this helper need to set the DefaultDeploymentUniqueLabelKey k/v pair.
func GetNewReplicaSetTemplate(deployment *extensions.Deployment) v1.PodTemplateSpec {
// newRS will have the same template as in deployment spec.
return v1.PodTemplateSpec{
ObjectMeta: deployment.Spec.Template.ObjectMeta,
Spec: deployment.Spec.Template.Spec,
}
}