71 lines
2.4 KiB
Go
71 lines
2.4 KiB
Go
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/*
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Copyright 2017 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 v1beta1
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import (
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"fmt"
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extensions "k8s.io/api/extensions/v1beta1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/labels"
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)
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// DeploymentListerExpansion allows custom methods to be added to
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// DeploymentLister.
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type DeploymentListerExpansion interface {
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GetDeploymentsForReplicaSet(rs *extensions.ReplicaSet) ([]*extensions.Deployment, error)
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}
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// DeploymentNamespaceListerExpansion allows custom methods to be added to
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// DeploymentNamespaceLister.
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type DeploymentNamespaceListerExpansion interface{}
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// GetDeploymentsForReplicaSet returns a list of Deployments that potentially
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// match a ReplicaSet. Only the one specified in the ReplicaSet's ControllerRef
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// will actually manage it.
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// Returns an error only if no matching Deployments are found.
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func (s *deploymentLister) GetDeploymentsForReplicaSet(rs *extensions.ReplicaSet) ([]*extensions.Deployment, error) {
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if len(rs.Labels) == 0 {
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return nil, fmt.Errorf("no deployments found for ReplicaSet %v because it has no labels", rs.Name)
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}
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// TODO: MODIFY THIS METHOD so that it checks for the podTemplateSpecHash label
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dList, err := s.Deployments(rs.Namespace).List(labels.Everything())
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if err != nil {
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return nil, err
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}
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var deployments []*extensions.Deployment
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for _, d := range dList {
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selector, err := metav1.LabelSelectorAsSelector(d.Spec.Selector)
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if err != nil {
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return nil, fmt.Errorf("invalid label selector: %v", err)
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}
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// If a deployment with a nil or empty selector creeps in, it should match nothing, not everything.
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if selector.Empty() || !selector.Matches(labels.Set(rs.Labels)) {
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continue
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}
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deployments = append(deployments, d)
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}
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if len(deployments) == 0 {
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return nil, fmt.Errorf("could not find deployments set for ReplicaSet %s in namespace %s with labels: %v", rs.Name, rs.Namespace, rs.Labels)
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}
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return deployments, nil
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}
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