forked from Azure/azure-container-networking
-
Notifications
You must be signed in to change notification settings - Fork 0
/
npm.go
309 lines (259 loc) · 9.39 KB
/
npm.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
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
// Copyright 2018 Microsoft. All rights reserved.
// MIT License
package npm
import (
"fmt"
"os"
"reflect"
"sync"
"time"
"github.com/Azure/azure-container-networking/log"
"github.com/Azure/azure-container-networking/npm/iptm"
"github.com/Azure/azure-container-networking/npm/util"
"github.com/Azure/azure-container-networking/telemetry"
corev1 "k8s.io/api/core/v1"
networkingv1 "k8s.io/api/networking/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/version"
"k8s.io/client-go/informers"
coreinformers "k8s.io/client-go/informers/core/v1"
networkinginformers "k8s.io/client-go/informers/networking/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
)
const (
hostNetAgentURLForNpm = "http://168.63.129.16/machine/plugins?comp=netagent&type=npmreport"
contentType = "application/json"
telemetryRetryWaitTimeInSeconds = 60
restoreRetryWaitTimeInSeconds = 5
restoreMaxRetries = 10
backupWaitTimeInSeconds = 60
)
// NetworkPolicyManager contains informers for pod, namespace and networkpolicy.
type NetworkPolicyManager struct {
sync.Mutex
clientset *kubernetes.Clientset
informerFactory informers.SharedInformerFactory
podInformer coreinformers.PodInformer
nsInformer coreinformers.NamespaceInformer
npInformer networkinginformers.NetworkPolicyInformer
nodeName string
nsMap map[string]*namespace
isAzureNpmChainCreated bool
clusterState telemetry.ClusterState
reportManager *telemetry.ReportManager
serverVersion *version.Info
TelemetryEnabled bool
}
// GetClusterState returns current cluster state.
func (npMgr *NetworkPolicyManager) GetClusterState() telemetry.ClusterState {
pods, err := npMgr.clientset.CoreV1().Pods("").List(metav1.ListOptions{})
if err != nil {
log.Printf("Error Listing pods in GetClusterState")
}
namespaces, err := npMgr.clientset.CoreV1().Namespaces().List(metav1.ListOptions{})
if err != nil {
log.Printf("Error Listing namespaces in GetClusterState")
}
networkpolicies, err := npMgr.clientset.NetworkingV1().NetworkPolicies("").List(metav1.ListOptions{})
if err != nil {
log.Printf("Error Listing networkpolicies in GetClusterState")
}
npMgr.clusterState.PodCount = len(pods.Items)
npMgr.clusterState.NsCount = len(namespaces.Items)
npMgr.clusterState.NwPolicyCount = len(networkpolicies.Items)
return npMgr.clusterState
}
// UpdateAndSendReport updates the npm report then send it.
// This function should only be called when npMgr is locked.
func (npMgr *NetworkPolicyManager) UpdateAndSendReport(err error, eventMsg string) error {
if !npMgr.TelemetryEnabled {
return nil
}
clusterState := npMgr.GetClusterState()
v := reflect.ValueOf(npMgr.reportManager.Report).Elem().FieldByName("ClusterState")
if v.CanSet() {
v.FieldByName("PodCount").SetInt(int64(clusterState.PodCount))
v.FieldByName("NsCount").SetInt(int64(clusterState.NsCount))
v.FieldByName("NwPolicyCount").SetInt(int64(clusterState.NwPolicyCount))
}
reflect.ValueOf(npMgr.reportManager.Report).Elem().FieldByName("EventMessage").SetString(eventMsg)
if err != nil {
reflect.ValueOf(npMgr.reportManager.Report).Elem().FieldByName("EventMessage").SetString(err.Error())
}
var telemetryBuffer *telemetry.TelemetryBuffer
connectToTelemetryServer(telemetryBuffer)
return npMgr.reportManager.SendReport(telemetryBuffer)
}
// restore restores iptables from backup file
func (npMgr *NetworkPolicyManager) restore() {
iptMgr := iptm.NewIptablesManager()
var err error
for i := 0; i < restoreMaxRetries; i++ {
if err = iptMgr.Restore(util.IptablesConfigFile); err == nil {
return
}
time.Sleep(restoreRetryWaitTimeInSeconds * time.Second)
}
log.Printf("Timeout restoring Azure-NPM states")
panic(err.Error)
}
// backup takes snapshots of iptables filter table and saves it periodically.
func (npMgr *NetworkPolicyManager) backup() {
iptMgr := iptm.NewIptablesManager()
var err error
for {
time.Sleep(backupWaitTimeInSeconds * time.Second)
if err = iptMgr.Save(util.IptablesConfigFile); err != nil {
log.Printf("Error backing up Azure-NPM states")
}
}
}
// Start starts shared informers and waits for the shared informer cache to sync.
func (npMgr *NetworkPolicyManager) Start(stopCh <-chan struct{}) error {
// Starts all informers manufactured by npMgr's informerFactory.
npMgr.informerFactory.Start(stopCh)
// Failure detected. Needs to restore Azure-NPM related iptables entries.
if util.Exists(util.IptablesConfigFile) {
npMgr.restore()
}
// Wait for the initial sync of local cache.
if !cache.WaitForCacheSync(stopCh, npMgr.podInformer.Informer().HasSynced) {
return fmt.Errorf("Pod informer failed to sync")
}
if !cache.WaitForCacheSync(stopCh, npMgr.nsInformer.Informer().HasSynced) {
return fmt.Errorf("Namespace informer failed to sync")
}
if !cache.WaitForCacheSync(stopCh, npMgr.npInformer.Informer().HasSynced) {
return fmt.Errorf("Namespace informer failed to sync")
}
go npMgr.backup()
return nil
}
func connectToTelemetryServer(telemetryBuffer *telemetry.TelemetryBuffer) {
for {
telemetryBuffer = telemetry.NewTelemetryBuffer("")
err := telemetryBuffer.StartServer()
if err == nil || telemetryBuffer.FdExists {
connErr := telemetryBuffer.Connect()
if connErr == nil {
break
}
log.Printf("[NPM-Telemetry] Failed to establish telemetry manager connection.")
time.Sleep(time.Second * telemetryRetryWaitTimeInSeconds)
}
}
}
// RunReportManager starts NPMReportManager and send telemetry periodically.
func (npMgr *NetworkPolicyManager) RunReportManager() {
if !npMgr.TelemetryEnabled {
return
}
var telemetryBuffer *telemetry.TelemetryBuffer
connectToTelemetryServer(telemetryBuffer)
go telemetryBuffer.BufferAndPushData(time.Duration(0))
for {
clusterState := npMgr.GetClusterState()
v := reflect.ValueOf(npMgr.reportManager.Report).Elem().FieldByName("ClusterState")
if v.CanSet() {
v.FieldByName("PodCount").SetInt(int64(clusterState.PodCount))
v.FieldByName("NsCount").SetInt(int64(clusterState.NsCount))
v.FieldByName("NwPolicyCount").SetInt(int64(clusterState.NwPolicyCount))
}
if err := npMgr.reportManager.SendReport(telemetryBuffer); err != nil {
log.Printf("[NPM-Telemetry] Error sending NPM telemetry report")
connectToTelemetryServer(telemetryBuffer)
}
time.Sleep(5 * time.Minute)
}
}
// NewNetworkPolicyManager creates a NetworkPolicyManager
func NewNetworkPolicyManager(clientset *kubernetes.Clientset, informerFactory informers.SharedInformerFactory, npmVersion string) *NetworkPolicyManager {
podInformer := informerFactory.Core().V1().Pods()
nsInformer := informerFactory.Core().V1().Namespaces()
npInformer := informerFactory.Networking().V1().NetworkPolicies()
serverVersion, err := clientset.ServerVersion()
if err != nil {
log.Printf("Error retrieving server version")
panic(err.Error)
}
log.Printf("API server version: %+v", serverVersion)
if err = util.SetIsNewNwPolicyVerFlag(serverVersion); err != nil {
log.Printf("Error setting IsNewNwPolicyVerFlag")
panic(err.Error)
}
npMgr := &NetworkPolicyManager{
clientset: clientset,
informerFactory: informerFactory,
podInformer: podInformer,
nsInformer: nsInformer,
npInformer: npInformer,
nodeName: os.Getenv("HOSTNAME"),
nsMap: make(map[string]*namespace),
isAzureNpmChainCreated: false,
clusterState: telemetry.ClusterState{
PodCount: 0,
NsCount: 0,
NwPolicyCount: 0,
},
reportManager: &telemetry.ReportManager{
HostNetAgentURL: hostNetAgentURLForNpm,
ContentType: contentType,
Report: &telemetry.NPMReport{},
},
serverVersion: serverVersion,
TelemetryEnabled: true,
}
clusterID := util.GetClusterID(npMgr.nodeName)
clusterState := npMgr.GetClusterState()
npMgr.reportManager.Report.(*telemetry.NPMReport).GetReport(clusterID, npMgr.nodeName, npmVersion, serverVersion.GitVersion, clusterState)
allNs, err := newNs(util.KubeAllNamespacesFlag)
if err != nil {
log.Printf("Error creating all-namespace")
panic(err.Error)
}
npMgr.nsMap[util.KubeAllNamespacesFlag] = allNs
podInformer.Informer().AddEventHandler(
// Pod event handlers
cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
npMgr.AddPod(obj.(*corev1.Pod))
},
UpdateFunc: func(old, new interface{}) {
npMgr.UpdatePod(old.(*corev1.Pod), new.(*corev1.Pod))
},
DeleteFunc: func(obj interface{}) {
npMgr.DeletePod(obj.(*corev1.Pod))
},
},
)
nsInformer.Informer().AddEventHandler(
// Namespace event handlers
cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
npMgr.AddNamespace(obj.(*corev1.Namespace))
},
UpdateFunc: func(old, new interface{}) {
npMgr.UpdateNamespace(old.(*corev1.Namespace), new.(*corev1.Namespace))
},
DeleteFunc: func(obj interface{}) {
npMgr.DeleteNamespace(obj.(*corev1.Namespace))
},
},
)
npInformer.Informer().AddEventHandler(
// Network policy event handlers
cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
npMgr.AddNetworkPolicy(obj.(*networkingv1.NetworkPolicy))
},
UpdateFunc: func(old, new interface{}) {
npMgr.UpdateNetworkPolicy(old.(*networkingv1.NetworkPolicy), new.(*networkingv1.NetworkPolicy))
},
DeleteFunc: func(obj interface{}) {
npMgr.DeleteNetworkPolicy(obj.(*networkingv1.NetworkPolicy))
},
},
)
return npMgr
}