-
Notifications
You must be signed in to change notification settings - Fork 77
/
main.go
362 lines (306 loc) · 10.7 KB
/
main.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
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
package main
import (
"context"
"flag"
"fmt"
"io/ioutil"
"log"
"math/rand"
"os"
"os/signal"
"runtime"
"runtime/pprof"
"strings"
"syscall"
"time"
)
var (
resultChan = make(chan Result)
stopWaitLoop = false
randomSource = rand.New(rand.NewSource(time.Now().UnixNano()))
subscriberClientIdTemplate = "mqtt-stresser-sub-%s-worker%d-%d"
publisherClientIdTemplate = "mqtt-stresser-pub-%s-worker%d-%d"
topicNameTemplate = "internal/mqtt-stresser/%s/worker%d-%d"
errorLogger = log.New(os.Stderr, "ERROR: ", log.Lmicroseconds|log.Ltime|log.Lshortfile)
verboseLogger = log.New(os.Stderr, "DEBUG: ", log.Lmicroseconds|log.Ltime|log.Lshortfile)
argNumClients = flag.Int("num-clients", 10, "Number of concurrent clients")
argNumMessages = flag.Int("num-messages", 10, "Number of messages shipped by client")
argConstantPayload = flag.String("constant-payload", "", "Use this constant payload in every MQTT message. If not set, an nearly constant autogenerated payload is used.")
argTimeout = flag.String("timeout", "5s", "Timeout for pub/sub actions")
argGlobalTimeout = flag.String("global-timeout", "60s", "Timeout spanning all operations")
argRampUpSize = flag.Int("rampup-size", 100, "Size of rampup batch. Default rampup batch size is 100.")
argRampUpDelay = flag.String("rampup-delay", "500ms", "Time between batch rampups")
argBrokerUrl = flag.String("broker", "", "Broker URL")
argUsername = flag.String("username", "", "Username")
argPassword = flag.String("password", "", "Password")
argLogLevel = flag.Int("log-level", 0, "Log level (0=nothing, 1=errors, 2=debug, 3=error+debug)")
argProfileCpu = flag.String("profile-cpu", "", "write cpu profile `file`")
argProfileMem = flag.String("profile-mem", "", "write memory profile to `file`")
argHideProgress = flag.Bool("no-progress", false, "Hide progress indicator")
argHelp = flag.Bool("help", false, "Show help")
argRetain = flag.Bool("retain", false, "if set, the retained flag of the published mqtt messages is set")
argPublisherQoS = flag.Int("publisher-qos", 0, "QoS level of published messages")
argSubscriberQoS = flag.Int("subscriber-qos", 0, " QoS level for the subscriber")
argSkipTLSVerification = flag.Bool("skip-tls-verification", false, "skip the tls verfication of the MQTT Connection")
argCafile = flag.String("cafile", "", "path to a file containing trusted CA certificates to enable encrypted certificate based communication.")
argKey = flag.String("key", "", "client private key for authentication, if required by server.")
argCert = flag.String("cert", "", "client certificate for authentication, if required by server.")
argPauseBetweenMessages = flag.String("pause-between-messages", "0s", "Adds a pause between sending messages to simulate sensors sending messages infrequently")
argTopicBasePath = flag.String("topic-base-path", "", "topic base path, if empty the default is internal/mqtt-stresser")
)
type Result struct {
WorkerId int
Event string
PublishTime time.Duration
ReceiveTime time.Duration
MessagesReceived int
MessagesPublished int
Error bool
ErrorMessage error
}
type TimeoutError interface {
Timeout() bool
Error() string
}
func parseQosLevels(qos int, role string) (byte, error) {
if qos < 0 || qos > 2 {
return 0, fmt.Errorf("%q is an invalid QoS level for %s. Valid levels are 0, 1 and 2", qos, role)
}
return byte(qos), nil
}
func fileExists(filename string) bool {
info, err := os.Stat(filename)
if os.IsNotExist(err) {
return false
}
return !info.IsDir()
}
// An error is returned of the given TLS configuration is invalid.
func validateTLSFiles(argCafile, argKey, argCert string) error {
if len(argCafile) > 0 {
if !fileExists(argCafile) {
return fmt.Errorf("CA file %q does not exist", argCafile)
}
}
if len(argKey) > 0 {
if !fileExists(argKey) {
return fmt.Errorf("key file %q does not exist", argKey)
}
}
if len(argCert) > 0 {
if !fileExists(argCert) {
return fmt.Errorf("cert file %q does not exist", argCert)
}
}
if len(argKey) > 0 && len(argCert) < 1 {
return fmt.Errorf("A key file is specified but no certificate file")
}
if len(argKey) < 1 && len(argCert) > 0 {
return fmt.Errorf("A cert file is specified but no key file")
}
return nil
}
// loadTLSFile loads the given file. If the filename is empty neither data nor an error is returned.
func loadTLSFile(fileName string) ([]byte, error) {
if len(fileName) > 0 {
data, err := ioutil.ReadFile(fileName)
if err != nil {
return nil, fmt.Errorf("failed to load TLS file: %q: %w", fileName, err)
}
return data, nil
}
return nil, nil
}
func main() {
flag.Parse()
if flag.NFlag() < 1 || *argHelp {
flag.Usage()
if *argHelp {
os.Exit(0)
}
os.Exit(1)
}
if *argProfileCpu != "" {
f, err := os.Create(*argProfileCpu)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create CPU profile: %s\n", err)
os.Exit(1)
}
if err := pprof.StartCPUProfile(f); err != nil {
fmt.Fprintf(os.Stderr, "Failed to start CPU profile: %s\n", err)
os.Exit(1)
}
}
num := *argNumMessages
username := *argUsername
password := *argPassword
actionTimeout, err := time.ParseDuration(*argTimeout)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to parse '--timeout': %q is not a valid duration string. See https://golang.org/pkg/time/#ParseDuration for valid duration strings\n", *argTimeout)
os.Exit(1)
}
verboseLogger.SetOutput(ioutil.Discard)
errorLogger.SetOutput(ioutil.Discard)
if *argLogLevel == 1 || *argLogLevel == 3 {
errorLogger.SetOutput(os.Stderr)
}
if *argLogLevel == 2 || *argLogLevel == 3 {
verboseLogger.SetOutput(os.Stderr)
}
if *argBrokerUrl == "" {
fmt.Fprintln(os.Stderr, "'--broker' is empty. Abort.")
os.Exit(1)
}
if len(*argTopicBasePath) > 0 {
topicNameTemplate = strings.Replace(topicNameTemplate, "internal/mqtt-stresser", *argTopicBasePath, 1)
}
payloadGenerator := defaultPayloadGen()
if len(*argConstantPayload) > 0 {
if strings.HasPrefix(*argConstantPayload, "@") {
verboseLogger.Printf("Set constant payload from file %s\n", *argConstantPayload)
payloadGenerator = filePayloadGenerator(*argConstantPayload)
}else {
verboseLogger.Printf("Set constant payload to %s\n", *argConstantPayload)
payloadGenerator = constantPayloadGenerator(*argConstantPayload)
}
}
var publisherQoS, subscriberQoS byte
if lvl, err := parseQosLevels(*argPublisherQoS, "publisher"); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
} else {
publisherQoS = lvl
}
if lvl, err := parseQosLevels(*argSubscriberQoS, "subscriber"); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
} else {
subscriberQoS = lvl
}
var ca, cert, key []byte
if err := validateTLSFiles(*argCafile, *argKey, *argCert); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
ca, err = loadTLSFile(*argCafile)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
cert, err = loadTLSFile(*argCert)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
key, err = loadTLSFile(*argKey)
if err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
signalChan := make(chan os.Signal, 1)
signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
rampUpDelay, _ := time.ParseDuration(*argRampUpDelay)
rampUpSize := *argRampUpSize
if rampUpSize < 0 {
rampUpSize = 100
}
resultChan = make(chan Result, *argNumClients**argNumMessages)
globalTimeout, err := time.ParseDuration(*argGlobalTimeout)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed parse '--global-timeout': %q is not a valid duration string. See https://golang.org/pkg/time/#ParseDuration for valid duration strings\n", *argGlobalTimeout)
os.Exit(1)
}
testCtx, cancelFunc := context.WithTimeout(context.Background(), globalTimeout)
pauseBetweenMessages, err := time.ParseDuration(*argPauseBetweenMessages)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed parse '--pause-between-messages': %q is not a valid duration string. See https://golang.org/pkg/time/#ParseDuration for valid duration strings\n", *argPauseBetweenMessages)
os.Exit(1)
}
stopStartLoop := false
for cid := 0; cid < *argNumClients && !stopStartLoop; cid++ {
if cid%rampUpSize == 0 && cid > 0 {
fmt.Printf("%d worker started - waiting %s\n", cid, rampUpDelay)
select {
case <-time.NewTimer(rampUpDelay).C:
case s := <-signalChan:
fmt.Printf("Got signal %s. Cancel test.\n", s.String())
cancelFunc()
stopStartLoop = true
}
}
go (&Worker{
WorkerId: cid,
BrokerUrl: *argBrokerUrl,
Username: username,
Password: password,
SkipTLSVerification: *argSkipTLSVerification,
NumberOfMessages: num,
PayloadGenerator: payloadGenerator,
Timeout: actionTimeout,
Retained: *argRetain,
PublisherQoS: publisherQoS,
SubscriberQoS: subscriberQoS,
CA: ca,
Cert: cert,
Key: key,
PauseBetweenMessages: pauseBetweenMessages,
}).Run(testCtx)
}
fmt.Printf("%d worker started\n", *argNumClients)
finEvents := 0
results := make([]Result, *argNumClients)
for finEvents < *argNumClients && !stopWaitLoop {
select {
case msg := <-resultChan:
results[msg.WorkerId] = msg
if msg.Event == CompletedEvent || msg.Error {
finEvents++
verboseLogger.Printf("%d/%d events received\n", finEvents, *argNumClients)
}
if msg.Error {
errorLogger.Println(msg)
}
if !*argHideProgress {
if msg.Event == ProgressReportEvent {
fmt.Print(".")
}
if msg.Error {
fmt.Print("E")
}
}
case <-testCtx.Done():
switch testCtx.Err().(type) {
case TimeoutError:
fmt.Println("Test timeout. Wait 5s to allow disconnection of clients.")
default:
fmt.Println("Test canceled. Wait 5s to allow disconnection of clients.")
}
time.Sleep(5 * time.Second)
stopWaitLoop = true
case s := <-signalChan:
fmt.Printf("Got signal %s. Cancel test.\n", s.String())
cancelFunc()
stopWaitLoop = true
}
}
summary, err := buildSummary(*argNumClients, num, results)
exitCode := 0
if err != nil {
exitCode = 1
} else {
printSummary(summary)
}
if *argProfileMem != "" {
f, err := os.Create(*argProfileMem)
if err != nil {
fmt.Printf("Failed to create memory profile: %s\n", err)
}
runtime.GC() // get up-to-date statistics
if err := pprof.WriteHeapProfile(f); err != nil {
fmt.Printf("Failed to write memory profile: %s\n", err)
}
f.Close()
}
pprof.StopCPUProfile()
os.Exit(exitCode)
}