forked from kubernetes/kubernetes
-
-
Notifications
You must be signed in to change notification settings - Fork 0
/
metadata.go
188 lines (169 loc) · 7.17 KB
/
metadata.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
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
/*
Copyright 2016 The Kubernetes 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 predicates
import (
"fmt"
"sync"
"k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/kubernetes/pkg/scheduler/algorithm"
"k8s.io/kubernetes/pkg/scheduler/schedulercache"
schedutil "k8s.io/kubernetes/pkg/scheduler/util"
"github.com/golang/glog"
)
// PredicateMetadataFactory defines a factory of predicate metadata.
type PredicateMetadataFactory struct {
podLister algorithm.PodLister
}
// Note that predicateMetadata and matchingPodAntiAffinityTerm need to be declared in the same file
// due to the way declarations are processed in predicate declaration unit tests.
type matchingPodAntiAffinityTerm struct {
term *v1.PodAffinityTerm
node *v1.Node
}
// NOTE: When new fields are added/removed or logic is changed, please make sure that
// RemovePod, AddPod, and ShallowCopy functions are updated to work with the new changes.
type predicateMetadata struct {
pod *v1.Pod
podBestEffort bool
podRequest *schedulercache.Resource
podPorts []*v1.ContainerPort
//key is a pod full name with the anti-affinity rules.
matchingAntiAffinityTerms map[string][]matchingPodAntiAffinityTerm
serviceAffinityInUse bool
serviceAffinityMatchingPodList []*v1.Pod
serviceAffinityMatchingPodServices []*v1.Service
}
// Ensure that predicateMetadata implements algorithm.PredicateMetadata.
var _ algorithm.PredicateMetadata = &predicateMetadata{}
// PredicateMetadataProducer function produces predicate metadata.
type PredicateMetadataProducer func(pm *predicateMetadata)
var predicateMetaProducerRegisterLock sync.Mutex
var predicateMetadataProducers = make(map[string]PredicateMetadataProducer)
// RegisterPredicateMetadataProducer registers a PredicateMetadataProducer.
func RegisterPredicateMetadataProducer(predicateName string, precomp PredicateMetadataProducer) {
predicateMetaProducerRegisterLock.Lock()
defer predicateMetaProducerRegisterLock.Unlock()
predicateMetadataProducers[predicateName] = precomp
}
// NewPredicateMetadataFactory creates a PredicateMetadataFactory.
func NewPredicateMetadataFactory(podLister algorithm.PodLister) algorithm.PredicateMetadataProducer {
factory := &PredicateMetadataFactory{
podLister,
}
return factory.GetMetadata
}
// GetMetadata returns the predicateMetadata used which will be used by various predicates.
func (pfactory *PredicateMetadataFactory) GetMetadata(pod *v1.Pod, nodeNameToInfoMap map[string]*schedulercache.NodeInfo) algorithm.PredicateMetadata {
// If we cannot compute metadata, just return nil
if pod == nil {
return nil
}
matchingTerms, err := getMatchingAntiAffinityTerms(pod, nodeNameToInfoMap)
if err != nil {
return nil
}
predicateMetadata := &predicateMetadata{
pod: pod,
podBestEffort: isPodBestEffort(pod),
podRequest: GetResourceRequest(pod),
podPorts: schedutil.GetContainerPorts(pod),
matchingAntiAffinityTerms: matchingTerms,
}
for predicateName, precomputeFunc := range predicateMetadataProducers {
glog.V(10).Infof("Precompute: %v", predicateName)
precomputeFunc(predicateMetadata)
}
return predicateMetadata
}
// RemovePod changes predicateMetadata assuming that the given `deletedPod` is
// deleted from the system.
func (meta *predicateMetadata) RemovePod(deletedPod *v1.Pod) error {
deletedPodFullName := schedutil.GetPodFullName(deletedPod)
if deletedPodFullName == schedutil.GetPodFullName(meta.pod) {
return fmt.Errorf("deletedPod and meta.pod must not be the same")
}
// Delete any anti-affinity rule from the deletedPod.
delete(meta.matchingAntiAffinityTerms, deletedPodFullName)
// All pods in the serviceAffinityMatchingPodList are in the same namespace.
// So, if the namespace of the first one is not the same as the namespace of the
// deletedPod, we don't need to check the list, as deletedPod isn't in the list.
if meta.serviceAffinityInUse &&
len(meta.serviceAffinityMatchingPodList) > 0 &&
deletedPod.Namespace == meta.serviceAffinityMatchingPodList[0].Namespace {
for i, pod := range meta.serviceAffinityMatchingPodList {
if schedutil.GetPodFullName(pod) == deletedPodFullName {
meta.serviceAffinityMatchingPodList = append(
meta.serviceAffinityMatchingPodList[:i],
meta.serviceAffinityMatchingPodList[i+1:]...)
break
}
}
}
return nil
}
// AddPod changes predicateMetadata assuming that `newPod` is added to the
// system.
func (meta *predicateMetadata) AddPod(addedPod *v1.Pod, nodeInfo *schedulercache.NodeInfo) error {
addedPodFullName := schedutil.GetPodFullName(addedPod)
if addedPodFullName == schedutil.GetPodFullName(meta.pod) {
return fmt.Errorf("addedPod and meta.pod must not be the same")
}
if nodeInfo.Node() == nil {
return fmt.Errorf("invalid node in nodeInfo")
}
// Add matching anti-affinity terms of the addedPod to the map.
podMatchingTerms, err := getMatchingAntiAffinityTermsOfExistingPod(meta.pod, addedPod, nodeInfo.Node())
if err != nil {
return err
}
if len(podMatchingTerms) > 0 {
existingTerms, found := meta.matchingAntiAffinityTerms[addedPodFullName]
if found {
meta.matchingAntiAffinityTerms[addedPodFullName] = append(existingTerms,
podMatchingTerms...)
} else {
meta.matchingAntiAffinityTerms[addedPodFullName] = podMatchingTerms
}
}
// If addedPod is in the same namespace as the meta.pod, update the list
// of matching pods if applicable.
if meta.serviceAffinityInUse && addedPod.Namespace == meta.pod.Namespace {
selector := CreateSelectorFromLabels(meta.pod.Labels)
if selector.Matches(labels.Set(addedPod.Labels)) {
meta.serviceAffinityMatchingPodList = append(meta.serviceAffinityMatchingPodList,
addedPod)
}
}
return nil
}
// ShallowCopy copies a metadata struct into a new struct and creates a copy of
// its maps and slices, but it does not copy the contents of pointer values.
func (meta *predicateMetadata) ShallowCopy() algorithm.PredicateMetadata {
newPredMeta := &predicateMetadata{
pod: meta.pod,
podBestEffort: meta.podBestEffort,
podRequest: meta.podRequest,
serviceAffinityInUse: meta.serviceAffinityInUse,
}
newPredMeta.podPorts = append([]*v1.ContainerPort(nil), meta.podPorts...)
newPredMeta.matchingAntiAffinityTerms = map[string][]matchingPodAntiAffinityTerm{}
for k, v := range meta.matchingAntiAffinityTerms {
newPredMeta.matchingAntiAffinityTerms[k] = append([]matchingPodAntiAffinityTerm(nil), v...)
}
newPredMeta.serviceAffinityMatchingPodServices = append([]*v1.Service(nil),
meta.serviceAffinityMatchingPodServices...)
newPredMeta.serviceAffinityMatchingPodList = append([]*v1.Pod(nil),
meta.serviceAffinityMatchingPodList...)
return (algorithm.PredicateMetadata)(newPredMeta)
}