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
|
package manager
import (
"fmt"
"sync"
v1 "k8s.io/api/core/v1"
)
// LocationCache cache the map of node, pod, configmap, secret
type LocationCache struct {
// EdgeNodes is a set, key is nodeName
EdgeNodes sync.Map
// configMapNode is a map, key is namespace/configMapName, value is nodeName
configMapNode sync.Map
// secretNode is a map, key is namespace/secretName, value is nodeName
secretNode sync.Map
}
// PodConfigMapsAndSecrets return configmaps and secrets used by pod
func (lc *LocationCache) PodConfigMapsAndSecrets(pod v1.Pod) (configMaps, secrets []string) {
for _, v := range pod.Spec.Volumes {
if v.ConfigMap != nil {
configMaps = append(configMaps, v.ConfigMap.Name)
}
if v.Secret != nil {
secrets = append(secrets, v.Secret.SecretName)
}
if v.Projected != nil {
for _, source := range v.Projected.Sources {
switch {
case source.ConfigMap != nil:
configMaps = append(configMaps, source.ConfigMap.Name)
case source.Secret != nil:
secrets = append(secrets, source.Secret.Name)
}
}
}
}
// used by envs
for _, s := range pod.Spec.Containers {
for _, ef := range s.EnvFrom {
if ef.ConfigMapRef != nil {
configMaps = append(configMaps, ef.ConfigMapRef.Name)
}
if ef.SecretRef != nil {
secrets = append(secrets, ef.SecretRef.Name)
}
}
for _, e := range s.Env {
if e.ValueFrom == nil {
continue
}
if e.ValueFrom.ConfigMapKeyRef != nil {
configMaps = append(configMaps, e.ValueFrom.ConfigMapKeyRef.Name)
} else if e.ValueFrom.SecretKeyRef != nil {
secrets = append(secrets, e.ValueFrom.SecretKeyRef.Name)
}
}
}
// used by ImagePullSecrets
for _, s := range pod.Spec.ImagePullSecrets {
secrets = append(secrets, s.Name)
}
return
}
func (lc *LocationCache) newNodes(oldNodes []string, node string) []string {
for _, n := range oldNodes {
if n == node {
return oldNodes
}
}
return append(oldNodes, node)
}
// AddOrUpdatePod add pod to node, pod to configmap, configmap to pod, pod to secret, secret to pod relation
func (lc *LocationCache) AddOrUpdatePod(pod v1.Pod) {
configMaps, secrets := lc.PodConfigMapsAndSecrets(pod)
for _, c := range configMaps {
configMapKey := fmt.Sprintf("%s/%s", pod.Namespace, c)
// update configMapPod
value, ok := lc.configMapNode.Load(configMapKey)
var newNodes []string
if ok {
nodes, _ := value.([]string)
newNodes = lc.newNodes(nodes, pod.Spec.NodeName)
} else {
newNodes = []string{pod.Spec.NodeName}
}
lc.configMapNode.Store(configMapKey, newNodes)
}
for _, s := range secrets {
secretKey := fmt.Sprintf("%s/%s", pod.Namespace, s)
// update secretPod
value, ok := lc.secretNode.Load(secretKey)
var newNodes []string
if ok {
nodes, _ := value.([]string)
newNodes = lc.newNodes(nodes, pod.Spec.NodeName)
} else {
newNodes = []string{pod.Spec.NodeName}
}
lc.secretNode.Store(secretKey, newNodes)
}
}
// ConfigMapNodes return all nodes which deploy pod on with configmap
func (lc *LocationCache) ConfigMapNodes(namespace, name string) (nodes []string) {
configMapKey := fmt.Sprintf("%s/%s", namespace, name)
value, ok := lc.configMapNode.Load(configMapKey)
if ok {
if nodes, ok := value.([]string); ok {
return nodes
}
}
return
}
// SecretNodes return all nodes which deploy pod on with secret
func (lc *LocationCache) SecretNodes(namespace, name string) (nodes []string) {
secretKey := fmt.Sprintf("%s/%s", namespace, name)
value, ok := lc.secretNode.Load(secretKey)
if ok {
if nodes, ok := value.([]string); ok {
return nodes
}
}
return
}
//IsEdgeNode checks weather node is edge node or not
func (lc *LocationCache) IsEdgeNode(nodeName string) bool {
_, ok := lc.EdgeNodes.Load(nodeName)
return ok
}
// UpdateEdgeNode is to maintain edge nodes name upto-date by querying kubernetes client
func (lc *LocationCache) UpdateEdgeNode(nodeName string) {
lc.EdgeNodes.Store(nodeName, struct{}{})
}
// DeleteConfigMap from cache
func (lc *LocationCache) DeleteConfigMap(namespace, name string) {
lc.configMapNode.Delete(fmt.Sprintf("%s/%s", namespace, name))
}
// DeleteSecret from cache
func (lc *LocationCache) DeleteSecret(namespace, name string) {
lc.secretNode.Delete(fmt.Sprintf("%s/%s", namespace, name))
}
// DeleteNode from cache
func (lc *LocationCache) DeleteNode(nodeName string) {
lc.EdgeNodes.Delete(nodeName)
}
|
