-
Notifications
You must be signed in to change notification settings - Fork 1.1k
/
client.go
476 lines (442 loc) · 20.5 KB
/
client.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
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
package remotewrite
import (
"bytes"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"strings"
"sync"
"time"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/awsapi"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/flagutil"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/persistentqueue"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/promauth"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/protoparser/common"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/ratelimiter"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/timerpool"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/timeutil"
"github.com/VictoriaMetrics/metrics"
)
var (
forcePromProto = flagutil.NewArrayBool("remoteWrite.forcePromProto", "Whether to force Prometheus remote write protocol for sending data "+
"to the corresponding -remoteWrite.url . See https://docs.victoriametrics.com/vmagent/#victoriametrics-remote-write-protocol")
forceVMProto = flagutil.NewArrayBool("remoteWrite.forceVMProto", "Whether to force VictoriaMetrics remote write protocol for sending data "+
"to the corresponding -remoteWrite.url . See https://docs.victoriametrics.com/vmagent/#victoriametrics-remote-write-protocol")
rateLimit = flagutil.NewArrayInt("remoteWrite.rateLimit", 0, "Optional rate limit in bytes per second for data sent to the corresponding -remoteWrite.url. "+
"By default, the rate limit is disabled. It can be useful for limiting load on remote storage when big amounts of buffered data "+
"is sent after temporary unavailability of the remote storage. See also -maxIngestionRate")
sendTimeout = flagutil.NewArrayDuration("remoteWrite.sendTimeout", time.Minute, "Timeout for sending a single block of data to the corresponding -remoteWrite.url")
proxyURL = flagutil.NewArrayString("remoteWrite.proxyURL", "Optional proxy URL for writing data to the corresponding -remoteWrite.url. "+
"Supported proxies: http, https, socks5. Example: -remoteWrite.proxyURL=socks5://proxy:1234")
tlsHandshakeTimeout = flagutil.NewArrayDuration("remoteWrite.tlsHandshakeTimeout", 20*time.Second, "The timeout for estabilishing tls connections to the corresponding -remoteWrite.url")
tlsInsecureSkipVerify = flagutil.NewArrayBool("remoteWrite.tlsInsecureSkipVerify", "Whether to skip tls verification when connecting to the corresponding -remoteWrite.url")
tlsCertFile = flagutil.NewArrayString("remoteWrite.tlsCertFile", "Optional path to client-side TLS certificate file to use when connecting "+
"to the corresponding -remoteWrite.url")
tlsKeyFile = flagutil.NewArrayString("remoteWrite.tlsKeyFile", "Optional path to client-side TLS certificate key to use when connecting to the corresponding -remoteWrite.url")
tlsCAFile = flagutil.NewArrayString("remoteWrite.tlsCAFile", "Optional path to TLS CA file to use for verifying connections to the corresponding -remoteWrite.url. "+
"By default, system CA is used")
tlsServerName = flagutil.NewArrayString("remoteWrite.tlsServerName", "Optional TLS server name to use for connections to the corresponding -remoteWrite.url. "+
"By default, the server name from -remoteWrite.url is used")
headers = flagutil.NewArrayString("remoteWrite.headers", "Optional HTTP headers to send with each request to the corresponding -remoteWrite.url. "+
"For example, -remoteWrite.headers='My-Auth:foobar' would send 'My-Auth: foobar' HTTP header with every request to the corresponding -remoteWrite.url. "+
"Multiple headers must be delimited by '^^': -remoteWrite.headers='header1:value1^^header2:value2'")
basicAuthUsername = flagutil.NewArrayString("remoteWrite.basicAuth.username", "Optional basic auth username to use for the corresponding -remoteWrite.url")
basicAuthPassword = flagutil.NewArrayString("remoteWrite.basicAuth.password", "Optional basic auth password to use for the corresponding -remoteWrite.url")
basicAuthPasswordFile = flagutil.NewArrayString("remoteWrite.basicAuth.passwordFile", "Optional path to basic auth password to use for the corresponding -remoteWrite.url. "+
"The file is re-read every second")
bearerToken = flagutil.NewArrayString("remoteWrite.bearerToken", "Optional bearer auth token to use for the corresponding -remoteWrite.url")
bearerTokenFile = flagutil.NewArrayString("remoteWrite.bearerTokenFile", "Optional path to bearer token file to use for the corresponding -remoteWrite.url. "+
"The token is re-read from the file every second")
oauth2ClientID = flagutil.NewArrayString("remoteWrite.oauth2.clientID", "Optional OAuth2 clientID to use for the corresponding -remoteWrite.url")
oauth2ClientSecret = flagutil.NewArrayString("remoteWrite.oauth2.clientSecret", "Optional OAuth2 clientSecret to use for the corresponding -remoteWrite.url")
oauth2ClientSecretFile = flagutil.NewArrayString("remoteWrite.oauth2.clientSecretFile", "Optional OAuth2 clientSecretFile to use for the corresponding -remoteWrite.url")
oauth2EndpointParams = flagutil.NewArrayString("remoteWrite.oauth2.endpointParams", "Optional OAuth2 endpoint parameters to use for the corresponding -remoteWrite.url . "+
`The endpoint parameters must be set in JSON format: {"param1":"value1",...,"paramN":"valueN"}`)
oauth2TokenURL = flagutil.NewArrayString("remoteWrite.oauth2.tokenUrl", "Optional OAuth2 tokenURL to use for the corresponding -remoteWrite.url")
oauth2Scopes = flagutil.NewArrayString("remoteWrite.oauth2.scopes", "Optional OAuth2 scopes to use for the corresponding -remoteWrite.url. Scopes must be delimited by ';'")
awsUseSigv4 = flagutil.NewArrayBool("remoteWrite.aws.useSigv4", "Enables SigV4 request signing for the corresponding -remoteWrite.url. "+
"It is expected that other -remoteWrite.aws.* command-line flags are set if sigv4 request signing is enabled")
awsEC2Endpoint = flagutil.NewArrayString("remoteWrite.aws.ec2Endpoint", "Optional AWS EC2 API endpoint to use for the corresponding -remoteWrite.url if -remoteWrite.aws.useSigv4 is set")
awsSTSEndpoint = flagutil.NewArrayString("remoteWrite.aws.stsEndpoint", "Optional AWS STS API endpoint to use for the corresponding -remoteWrite.url if -remoteWrite.aws.useSigv4 is set")
awsRegion = flagutil.NewArrayString("remoteWrite.aws.region", "Optional AWS region to use for the corresponding -remoteWrite.url if -remoteWrite.aws.useSigv4 is set")
awsRoleARN = flagutil.NewArrayString("remoteWrite.aws.roleARN", "Optional AWS roleARN to use for the corresponding -remoteWrite.url if -remoteWrite.aws.useSigv4 is set")
awsAccessKey = flagutil.NewArrayString("remoteWrite.aws.accessKey", "Optional AWS AccessKey to use for the corresponding -remoteWrite.url if -remoteWrite.aws.useSigv4 is set")
awsService = flagutil.NewArrayString("remoteWrite.aws.service", "Optional AWS Service to use for the corresponding -remoteWrite.url if -remoteWrite.aws.useSigv4 is set. "+
"Defaults to \"aps\"")
awsSecretKey = flagutil.NewArrayString("remoteWrite.aws.secretKey", "Optional AWS SecretKey to use for the corresponding -remoteWrite.url if -remoteWrite.aws.useSigv4 is set")
)
type client struct {
sanitizedURL string
remoteWriteURL string
// Whether to use VictoriaMetrics remote write protocol for sending the data to remoteWriteURL
useVMProto bool
fq *persistentqueue.FastQueue
hc *http.Client
sendBlock func(block []byte) bool
authCfg *promauth.Config
awsCfg *awsapi.Config
rl *ratelimiter.RateLimiter
bytesSent *metrics.Counter
blocksSent *metrics.Counter
requestDuration *metrics.Histogram
requestsOKCount *metrics.Counter
errorsCount *metrics.Counter
packetsDropped *metrics.Counter
rateLimit *metrics.Gauge
retriesCount *metrics.Counter
sendDuration *metrics.FloatCounter
wg sync.WaitGroup
stopCh chan struct{}
}
func newHTTPClient(argIdx int, remoteWriteURL, sanitizedURL string, fq *persistentqueue.FastQueue, concurrency int) *client {
authCfg, err := getAuthConfig(argIdx)
if err != nil {
logger.Fatalf("cannot initialize auth config for -remoteWrite.url=%q: %s", remoteWriteURL, err)
}
awsCfg, err := getAWSAPIConfig(argIdx)
if err != nil {
logger.Fatalf("cannot initialize AWS Config for -remoteWrite.url=%q: %s", remoteWriteURL, err)
}
tr := &http.Transport{
DialContext: statDial,
TLSHandshakeTimeout: tlsHandshakeTimeout.GetOptionalArg(argIdx),
MaxConnsPerHost: 2 * concurrency,
MaxIdleConnsPerHost: 2 * concurrency,
IdleConnTimeout: time.Minute,
WriteBufferSize: 64 * 1024,
}
pURL := proxyURL.GetOptionalArg(argIdx)
if len(pURL) > 0 {
if !strings.Contains(pURL, "://") {
logger.Fatalf("cannot parse -remoteWrite.proxyURL=%q: it must start with `http://`, `https://` or `socks5://`", pURL)
}
pu, err := url.Parse(pURL)
if err != nil {
logger.Fatalf("cannot parse -remoteWrite.proxyURL=%q: %s", pURL, err)
}
tr.Proxy = http.ProxyURL(pu)
}
hc := &http.Client{
Transport: authCfg.NewRoundTripper(tr),
Timeout: sendTimeout.GetOptionalArg(argIdx),
}
c := &client{
sanitizedURL: sanitizedURL,
remoteWriteURL: remoteWriteURL,
authCfg: authCfg,
awsCfg: awsCfg,
fq: fq,
hc: hc,
stopCh: make(chan struct{}),
}
c.sendBlock = c.sendBlockHTTP
useVMProto := forceVMProto.GetOptionalArg(argIdx)
usePromProto := forcePromProto.GetOptionalArg(argIdx)
if useVMProto && usePromProto {
logger.Fatalf("-remoteWrite.useVMProto and -remoteWrite.usePromProto cannot be set simultaneously for -remoteWrite.url=%s", sanitizedURL)
}
if !useVMProto && !usePromProto {
// Auto-detect whether the remote storage supports VictoriaMetrics remote write protocol.
doRequest := func(url string) (*http.Response, error) {
return c.doRequest(url, nil)
}
useVMProto = common.HandleVMProtoClientHandshake(c.remoteWriteURL, doRequest)
if !useVMProto {
logger.Infof("the remote storage at %q doesn't support VictoriaMetrics remote write protocol. Switching to Prometheus remote write protocol. "+
"See https://docs.victoriametrics.com/vmagent/#victoriametrics-remote-write-protocol", sanitizedURL)
}
}
c.useVMProto = useVMProto
return c
}
func (c *client) init(argIdx, concurrency int, sanitizedURL string) {
limitReached := metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_rate_limit_reached_total{url=%q}`, c.sanitizedURL))
if bytesPerSec := rateLimit.GetOptionalArg(argIdx); bytesPerSec > 0 {
logger.Infof("applying %d bytes per second rate limit for -remoteWrite.url=%q", bytesPerSec, sanitizedURL)
c.rl = ratelimiter.New(int64(bytesPerSec), limitReached, c.stopCh)
}
c.bytesSent = metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_bytes_sent_total{url=%q}`, c.sanitizedURL))
c.blocksSent = metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_blocks_sent_total{url=%q}`, c.sanitizedURL))
c.rateLimit = metrics.GetOrCreateGauge(fmt.Sprintf(`vmagent_remotewrite_rate_limit{url=%q}`, c.sanitizedURL), func() float64 {
return float64(rateLimit.GetOptionalArg(argIdx))
})
c.requestDuration = metrics.GetOrCreateHistogram(fmt.Sprintf(`vmagent_remotewrite_duration_seconds{url=%q}`, c.sanitizedURL))
c.requestsOKCount = metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_requests_total{url=%q, status_code="2XX"}`, c.sanitizedURL))
c.errorsCount = metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_errors_total{url=%q}`, c.sanitizedURL))
c.packetsDropped = metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_packets_dropped_total{url=%q}`, c.sanitizedURL))
c.retriesCount = metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_retries_count_total{url=%q}`, c.sanitizedURL))
c.sendDuration = metrics.GetOrCreateFloatCounter(fmt.Sprintf(`vmagent_remotewrite_send_duration_seconds_total{url=%q}`, c.sanitizedURL))
metrics.GetOrCreateGauge(fmt.Sprintf(`vmagent_remotewrite_queues{url=%q}`, c.sanitizedURL), func() float64 {
return float64(*queues)
})
for i := 0; i < concurrency; i++ {
c.wg.Add(1)
go func() {
defer c.wg.Done()
c.runWorker()
}()
}
logger.Infof("initialized client for -remoteWrite.url=%q", c.sanitizedURL)
}
func (c *client) MustStop() {
close(c.stopCh)
c.wg.Wait()
logger.Infof("stopped client for -remoteWrite.url=%q", c.sanitizedURL)
}
func getAuthConfig(argIdx int) (*promauth.Config, error) {
headersValue := headers.GetOptionalArg(argIdx)
var hdrs []string
if headersValue != "" {
hdrs = strings.Split(headersValue, "^^")
}
username := basicAuthUsername.GetOptionalArg(argIdx)
password := basicAuthPassword.GetOptionalArg(argIdx)
passwordFile := basicAuthPasswordFile.GetOptionalArg(argIdx)
var basicAuthCfg *promauth.BasicAuthConfig
if username != "" || password != "" || passwordFile != "" {
basicAuthCfg = &promauth.BasicAuthConfig{
Username: username,
Password: promauth.NewSecret(password),
PasswordFile: passwordFile,
}
}
token := bearerToken.GetOptionalArg(argIdx)
tokenFile := bearerTokenFile.GetOptionalArg(argIdx)
var oauth2Cfg *promauth.OAuth2Config
clientSecret := oauth2ClientSecret.GetOptionalArg(argIdx)
clientSecretFile := oauth2ClientSecretFile.GetOptionalArg(argIdx)
if clientSecretFile != "" || clientSecret != "" {
endpointParamsJSON := oauth2EndpointParams.GetOptionalArg(argIdx)
endpointParams, err := flagutil.ParseJSONMap(endpointParamsJSON)
if err != nil {
return nil, fmt.Errorf("cannot parse JSON for -remoteWrite.oauth2.endpointParams=%s: %w", endpointParamsJSON, err)
}
oauth2Cfg = &promauth.OAuth2Config{
ClientID: oauth2ClientID.GetOptionalArg(argIdx),
ClientSecret: promauth.NewSecret(clientSecret),
ClientSecretFile: clientSecretFile,
EndpointParams: endpointParams,
TokenURL: oauth2TokenURL.GetOptionalArg(argIdx),
Scopes: strings.Split(oauth2Scopes.GetOptionalArg(argIdx), ";"),
}
}
tlsCfg := &promauth.TLSConfig{
CAFile: tlsCAFile.GetOptionalArg(argIdx),
CertFile: tlsCertFile.GetOptionalArg(argIdx),
KeyFile: tlsKeyFile.GetOptionalArg(argIdx),
ServerName: tlsServerName.GetOptionalArg(argIdx),
InsecureSkipVerify: tlsInsecureSkipVerify.GetOptionalArg(argIdx),
}
opts := &promauth.Options{
BasicAuth: basicAuthCfg,
BearerToken: token,
BearerTokenFile: tokenFile,
OAuth2: oauth2Cfg,
TLSConfig: tlsCfg,
Headers: hdrs,
}
authCfg, err := opts.NewConfig()
if err != nil {
return nil, fmt.Errorf("cannot populate auth config for remoteWrite idx: %d, err: %w", argIdx, err)
}
return authCfg, nil
}
func getAWSAPIConfig(argIdx int) (*awsapi.Config, error) {
if !awsUseSigv4.GetOptionalArg(argIdx) {
return nil, nil
}
ec2Endpoint := awsEC2Endpoint.GetOptionalArg(argIdx)
stsEndpoint := awsSTSEndpoint.GetOptionalArg(argIdx)
region := awsRegion.GetOptionalArg(argIdx)
roleARN := awsRoleARN.GetOptionalArg(argIdx)
accessKey := awsAccessKey.GetOptionalArg(argIdx)
secretKey := awsSecretKey.GetOptionalArg(argIdx)
service := awsService.GetOptionalArg(argIdx)
cfg, err := awsapi.NewConfig(ec2Endpoint, stsEndpoint, region, roleARN, accessKey, secretKey, service)
if err != nil {
return nil, err
}
return cfg, nil
}
func (c *client) runWorker() {
var ok bool
var block []byte
ch := make(chan bool, 1)
for {
block, ok = c.fq.MustReadBlock(block[:0])
if !ok {
return
}
go func() {
startTime := time.Now()
ch <- c.sendBlock(block)
c.sendDuration.Add(time.Since(startTime).Seconds())
}()
select {
case ok := <-ch:
if ok {
// The block has been sent successfully
continue
}
// Return unsent block to the queue.
c.fq.MustWriteBlockIgnoreDisabledPQ(block)
return
case <-c.stopCh:
// c must be stopped. Wait for a while in the hope the block will be sent.
graceDuration := 5 * time.Second
select {
case ok := <-ch:
if !ok {
// Return unsent block to the queue.
c.fq.MustWriteBlockIgnoreDisabledPQ(block)
}
case <-time.After(graceDuration):
// Return unsent block to the queue.
c.fq.MustWriteBlockIgnoreDisabledPQ(block)
}
return
}
}
}
func (c *client) doRequest(url string, body []byte) (*http.Response, error) {
req, err := c.newRequest(url, body)
if err != nil {
return nil, err
}
resp, err := c.hc.Do(req)
if err == nil {
return resp, nil
}
if !errors.Is(err, io.EOF) && !errors.Is(err, io.ErrUnexpectedEOF) {
return nil, err
}
// It is likely connection became stale or timed out during the first request.
// Make another attempt in hope request will succeed.
// If not, the error should be handled by the caller as usual.
// This should help with https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4139
req, err = c.newRequest(url, body)
if err != nil {
return nil, fmt.Errorf("second attempt: %w", err)
}
resp, err = c.hc.Do(req)
if err != nil {
return nil, fmt.Errorf("second attempt: %w", err)
}
return resp, nil
}
func (c *client) newRequest(url string, body []byte) (*http.Request, error) {
reqBody := bytes.NewBuffer(body)
req, err := http.NewRequest(http.MethodPost, url, reqBody)
if err != nil {
logger.Panicf("BUG: unexpected error from http.NewRequest(%q): %s", url, err)
}
err = c.authCfg.SetHeaders(req, true)
if err != nil {
return nil, err
}
h := req.Header
h.Set("User-Agent", "vmagent")
h.Set("Content-Type", "application/x-protobuf")
if c.useVMProto {
h.Set("Content-Encoding", "zstd")
h.Set("X-VictoriaMetrics-Remote-Write-Version", "1")
} else {
h.Set("Content-Encoding", "snappy")
h.Set("X-Prometheus-Remote-Write-Version", "0.1.0")
}
if c.awsCfg != nil {
sigv4Hash := awsapi.HashHex(body)
if err := c.awsCfg.SignRequest(req, sigv4Hash); err != nil {
return nil, fmt.Errorf("cannot sign remoteWrite request with AWS sigv4: %w", err)
}
}
return req, nil
}
// sendBlockHTTP sends the given block to c.remoteWriteURL.
//
// The function returns false only if c.stopCh is closed.
// Otherwise it tries sending the block to remote storage indefinitely.
func (c *client) sendBlockHTTP(block []byte) bool {
c.rl.Register(len(block))
maxRetryDuration := timeutil.AddJitterToDuration(time.Minute)
retryDuration := timeutil.AddJitterToDuration(time.Second)
retriesCount := 0
again:
startTime := time.Now()
resp, err := c.doRequest(c.remoteWriteURL, block)
c.requestDuration.UpdateDuration(startTime)
if err != nil {
c.errorsCount.Inc()
retryDuration *= 2
if retryDuration > maxRetryDuration {
retryDuration = maxRetryDuration
}
logger.Warnf("couldn't send a block with size %d bytes to %q: %s; re-sending the block in %.3f seconds",
len(block), c.sanitizedURL, err, retryDuration.Seconds())
t := timerpool.Get(retryDuration)
select {
case <-c.stopCh:
timerpool.Put(t)
return false
case <-t.C:
timerpool.Put(t)
}
c.retriesCount.Inc()
goto again
}
statusCode := resp.StatusCode
if statusCode/100 == 2 {
_ = resp.Body.Close()
c.requestsOKCount.Inc()
c.bytesSent.Add(len(block))
c.blocksSent.Inc()
return true
}
metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_requests_total{url=%q, status_code="%d"}`, c.sanitizedURL, statusCode)).Inc()
if statusCode == 409 || statusCode == 400 {
body, err := io.ReadAll(resp.Body)
_ = resp.Body.Close()
if err != nil {
remoteWriteRejectedLogger.Errorf("sending a block with size %d bytes to %q was rejected (skipping the block): status code %d; "+
"failed to read response body: %s",
len(block), c.sanitizedURL, statusCode, err)
} else {
remoteWriteRejectedLogger.Errorf("sending a block with size %d bytes to %q was rejected (skipping the block): status code %d; response body: %s",
len(block), c.sanitizedURL, statusCode, string(body))
}
// Just drop block on 409 and 400 status codes like Prometheus does.
// See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/873
// and https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1149
_ = resp.Body.Close()
c.packetsDropped.Inc()
return true
}
// Unexpected status code returned
retriesCount++
retryDuration *= 2
if retryDuration > maxRetryDuration {
retryDuration = maxRetryDuration
}
body, err := io.ReadAll(resp.Body)
_ = resp.Body.Close()
if err != nil {
logger.Errorf("cannot read response body from %q during retry #%d: %s", c.sanitizedURL, retriesCount, err)
} else {
logger.Errorf("unexpected status code received after sending a block with size %d bytes to %q during retry #%d: %d; response body=%q; "+
"re-sending the block in %.3f seconds", len(block), c.sanitizedURL, retriesCount, statusCode, body, retryDuration.Seconds())
}
t := timerpool.Get(retryDuration)
select {
case <-c.stopCh:
timerpool.Put(t)
return false
case <-t.C:
timerpool.Put(t)
}
c.retriesCount.Inc()
goto again
}
var remoteWriteRejectedLogger = logger.WithThrottler("remoteWriteRejected", 5*time.Second)