-
Notifications
You must be signed in to change notification settings - Fork 149
/
server.go
237 lines (200 loc) · 5.59 KB
/
server.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
package daemon
import (
"context"
"fmt"
"io"
"net"
"net/http"
_ "net/http/pprof" // import pprof for diagnose
"os"
"os/signal"
"path/filepath"
"runtime"
"strings"
"sync"
"syscall"
"time"
"github.com/go-logr/logr"
logf "sigs.k8s.io/controller-runtime/pkg/log"
"github.com/AliyunContainerService/terway/pkg/metric"
"github.com/AliyunContainerService/terway/pkg/tracing"
"github.com/AliyunContainerService/terway/pkg/utils"
"github.com/AliyunContainerService/terway/rpc"
"github.com/prometheus/client_golang/prometheus"
"github.com/prometheus/client_golang/prometheus/promhttp"
"google.golang.org/grpc"
)
const daemonRPCTimeout = 118 * time.Second
const (
prevCNIConfFile = "10-terway.conf"
cinConfFile = "10-terway.conflist"
tmpCNIConfigPath = "/etc/cni/net.d" // that is tmpfs
hostCNIConfigPath = "/host-etc-net.d"
)
// stackTriger print golang stack trace to log
func stackTriger() {
sigchain := make(chan os.Signal, 1)
go func(c chan os.Signal) {
for {
<-sigchain
var (
buf []byte
stackSize int
)
bufferLen := 16384
for stackSize == len(buf) {
buf = make([]byte, bufferLen)
stackSize = runtime.Stack(buf, true)
bufferLen *= 2
}
buf = buf[:stackSize]
os.Stdout.Write(buf)
}
}(sigchain)
signal.Notify(sigchain, stackTriggerSignals...)
}
// Run terway daemon
func Run(ctx context.Context, socketFilePath, debugSocketListen, configFilePath, daemonMode string) error {
l, err := newUnixListener(socketFilePath)
if err != nil {
return fmt.Errorf("error listen at %s: %v", socketFilePath, err)
}
svc, err := newNetworkService(ctx, configFilePath, daemonMode)
if err != nil {
return err
}
grpcServer := grpc.NewServer(grpc.ChainUnaryInterceptor(
cniInterceptor,
))
rpc.RegisterTerwayBackendServer(grpcServer, svc)
rpc.RegisterTerwayTracingServer(grpcServer, tracing.DefaultRPCServer())
stop := make(chan struct{})
stackTriger()
err = runDebugServer(ctx, &svc.wg, debugSocketListen)
if err != nil {
return err
}
go func() {
serviceLog.Info("start serving", "path", socketFilePath)
err = grpcServer.Serve(l)
if err != nil {
serviceLog.Error(err, "error serving grpc")
close(stop)
}
}()
err = ensureCNIConfig()
if err != nil {
return err
}
select {
case <-ctx.Done():
case <-stop:
}
grpcServer.Stop()
svc.wg.Wait()
return nil
}
func newUnixListener(addr string) (net.Listener, error) {
err := os.MkdirAll(filepath.Dir(addr), 0700)
if err != nil {
return nil, fmt.Errorf("error create socket dir: %s, %w", addr, err)
}
err = syscall.Unlink(addr)
if err != nil && !os.IsNotExist(err) {
return nil, fmt.Errorf("error unlink socket file: %s, %w", addr, err)
}
mask := syscallUmask(0777)
defer syscallUmask(mask)
l, err := net.Listen("unix", addr)
if err != nil {
return nil, err
}
err = os.Chmod(addr, 0600)
if err != nil {
return nil, err
}
return l, nil
}
func ensureCNIConfig() error {
src, err := os.Open(filepath.Join(tmpCNIConfigPath, cinConfFile))
if err != nil {
return err
}
defer src.Close()
dst, err := os.OpenFile(filepath.Join(hostCNIConfigPath, cinConfFile), os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0600)
if err != nil {
return err
}
defer dst.Close()
_, err = io.Copy(dst, src)
if err != nil {
return err
}
serviceLog.Info("write cni conf success")
_ = os.Remove(filepath.Join(hostCNIConfigPath, prevCNIConfFile))
return nil
}
func runDebugServer(ctx context.Context, wg *sync.WaitGroup, debugSocketListen string) error {
var (
l net.Listener
err error
)
if strings.HasPrefix(debugSocketListen, "unix://") {
debugSocketListen = strings.TrimPrefix(debugSocketListen, "unix://")
l, err = newUnixListener(debugSocketListen)
if err != nil {
return fmt.Errorf("error listen at %s: %v", debugSocketListen, err)
}
} else {
l, err = net.Listen("tcp", debugSocketListen)
if err != nil {
return fmt.Errorf("error listen at %s: %v", debugSocketListen, err)
}
}
registerPrometheus()
http.DefaultServeMux.Handle("/metrics", promhttp.Handler())
go func() {
err := http.Serve(l, http.DefaultServeMux)
if err != nil {
serviceLog.Error(err, "error start debug server")
}
}()
wg.Add(1)
go func() {
<-ctx.Done()
_ = l.Close()
wg.Done()
}()
return nil
}
// RegisterPrometheus register metrics to prometheus server
func registerPrometheus() {
prometheus.MustRegister(metric.RPCLatency)
prometheus.MustRegister(metric.OpenAPILatency)
prometheus.MustRegister(metric.MetadataLatency)
// ResourcePool
prometheus.MustRegister(metric.ResourcePoolTotal)
prometheus.MustRegister(metric.ResourcePoolIdle)
prometheus.MustRegister(metric.ResourcePoolDisposed)
// ENIIP
prometheus.MustRegister(metric.ENIIPFactoryIPCount)
prometheus.MustRegister(metric.ENIIPFactoryENICount)
prometheus.MustRegister(metric.ENIIPFactoryIPAllocCount)
}
func cniInterceptor(ctx context.Context, req interface{}, info *grpc.UnaryServerInfo, handler grpc.UnaryHandler) (interface{}, error) {
ctx, cancel := context.WithTimeout(ctx, daemonRPCTimeout)
defer cancel()
switch r := req.(type) {
case *rpc.AllocIPRequest:
l := logf.FromContext(ctx, "pod", utils.PodInfoKey(r.K8SPodNamespace, r.K8SPodName), "containerID", r.K8SPodInfraContainerId)
ctx = logr.NewContext(ctx, l)
case *rpc.ReleaseIPRequest:
l := logf.FromContext(ctx, "pod", utils.PodInfoKey(r.K8SPodNamespace, r.K8SPodName), "containerID", r.K8SPodInfraContainerId)
ctx = logr.NewContext(ctx, l)
case *rpc.GetInfoRequest:
l := logf.FromContext(ctx, "pod", utils.PodInfoKey(r.K8SPodNamespace, r.K8SPodName), "containerID", r.K8SPodInfraContainerId)
ctx = logr.NewContext(ctx, l)
default:
}
return handler(ctx, req)
}