/
replicationcontrollercommon.go
118 lines (99 loc) · 3.92 KB
/
replicationcontrollercommon.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
// Copyright 2015 Google Inc. All Rights Reserved.
//
// 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 replicationcontroller
import (
"github.com/kubernetes/dashboard/resource/common"
"k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/api/unversioned"
client "k8s.io/kubernetes/pkg/client/unversioned"
"k8s.io/kubernetes/pkg/fields"
"k8s.io/kubernetes/pkg/labels"
)
// ReplicationControllerWithPods is a structure representing replication controller and its pods.
type ReplicationControllerWithPods struct {
ReplicationController *api.ReplicationController
Pods *api.PodList
}
// Returns structure containing ReplicationController and Pods for the given replication controller.
func getRawReplicationControllerWithPods(client client.Interface, namespace, name string) (
*ReplicationControllerWithPods, error) {
replicationController, err := client.ReplicationControllers(namespace).Get(name)
if err != nil {
return nil, err
}
labelSelector := labels.SelectorFromSet(replicationController.Spec.Selector)
pods, err := client.Pods(namespace).List(
api.ListOptions{
LabelSelector: labelSelector,
FieldSelector: fields.Everything(),
})
if err != nil {
return nil, err
}
replicationControllerAndPods := &ReplicationControllerWithPods{
ReplicationController: replicationController,
Pods: pods,
}
return replicationControllerAndPods, nil
}
// Retrieves Pod list that belongs to a Replication Controller.
func getRawReplicationControllerPods(client client.Interface, namespace, name string) (*api.PodList, error) {
replicationControllerAndPods, err := getRawReplicationControllerWithPods(client, namespace, name)
if err != nil {
return nil, err
}
return replicationControllerAndPods.Pods, nil
}
// getReplicationPodInfo returns aggregate information about replication controller pods.
func getReplicationPodInfo(replicationController *api.ReplicationController,
pods []api.Pod) common.PodInfo {
return common.GetPodInfo(replicationController.Status.Replicas,
replicationController.Spec.Replicas, pods)
}
// Transforms simple selector map to labels.Selector object that can be used when querying for
// object.
func toLabelSelector(selector map[string]string) (labels.Selector, error) {
labelSelector, err := unversioned.LabelSelectorAsSelector(&unversioned.LabelSelector{MatchLabels: selector})
if err != nil {
return nil, err
}
return labelSelector, nil
}
// Based on given selector returns list of services that are candidates for deletion.
// Services are matched by replication controllers' label selector. They are deleted if given
// label selector is targeting only 1 replication controller.
func getServicesForDeletion(client client.Interface, labelSelector labels.Selector,
namespace string) ([]api.Service, error) {
replicationControllers, err := client.ReplicationControllers(namespace).List(api.ListOptions{
LabelSelector: labelSelector,
FieldSelector: fields.Everything(),
})
if err != nil {
return nil, err
}
// if label selector is targeting only 1 replication controller
// then we can delete services targeted by this label selector,
// otherwise we can not delete any services so just return empty list
if len(replicationControllers.Items) != 1 {
return []api.Service{}, nil
}
services, err := client.Services(namespace).List(api.ListOptions{
LabelSelector: labelSelector,
FieldSelector: fields.Everything(),
})
if err != nil {
return nil, err
}
return services.Items, nil
}