mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-15 08:23:34 +01:00
275 lines
9.5 KiB
Go
275 lines
9.5 KiB
Go
package remotewrite
|
|
|
|
import (
|
|
"crypto/tls"
|
|
"encoding/base64"
|
|
"flag"
|
|
"fmt"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"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/fasthttp"
|
|
"github.com/VictoriaMetrics/metrics"
|
|
)
|
|
|
|
var (
|
|
sendTimeout = flag.Duration("remoteWrite.sendTimeout", time.Minute, "Timeout for sending a single block of data to -remoteWrite.url")
|
|
|
|
tlsInsecureSkipVerify = flag.Bool("remoteWrite.tlsInsecureSkipVerify", false, "Whether to skip tls verification when connecting to -remoteWrite.url")
|
|
tlsCertFile = flagutil.NewArray("remoteWrite.tlsCertFile", "Optional path to client-side TLS certificate file to use when connecting to -remoteWrite.url. "+
|
|
"If multiple args are set, then they are applied independently for the corresponding -remoteWrite.url")
|
|
tlsKeyFile = flagutil.NewArray("remoteWrite.tlsKeyFile", "Optional path to client-side TLS certificate key to use when connecting to -remoteWrite.url. "+
|
|
"If multiple args are set, then they are applied independently for the corresponding -remoteWrite.url")
|
|
tlsCAFile = flagutil.NewArray("remoteWrite.tlsCAFile", "Optional path to TLS CA file to use for verifying connections to -remoteWrite.url. "+
|
|
"By default system CA is used. If multiple args are set, then they are applied independently for the corresponding -remoteWrite.url")
|
|
tlsServerName = flagutil.NewArray("remoteWrite.tlsServerName", "Optional TLS server name to use for connections to -remoteWrite.url. "+
|
|
"By default the server name from -remoteWrite.url is used. If multiple args are set, then they are applied independently for the corresponding -remoteWrite.url")
|
|
|
|
basicAuthUsername = flagutil.NewArray("remoteWrite.basicAuth.username", "Optional basic auth username to use for -remoteWrite.url. "+
|
|
"If multiple args are set, then they are applied independently for the corresponding -remoteWrite.url")
|
|
basicAuthPassword = flagutil.NewArray("remoteWrite.basicAuth.password", "Optional basic auth password to use for -remoteWrite.url. "+
|
|
"If multiple args are set, then they are applied independently for the corresponding -remoteWrite.url")
|
|
bearerToken = flagutil.NewArray("remoteWrite.bearerToken", "Optional bearer auth token to use for -remoteWrite.url. "+
|
|
"If multiple args are set, then they are applied independently for the corresponding -remoteWrite.url")
|
|
)
|
|
|
|
type client struct {
|
|
urlLabelValue string
|
|
remoteWriteURL string
|
|
host string
|
|
requestURI string
|
|
authHeader string
|
|
fq *persistentqueue.FastQueue
|
|
hc *fasthttp.HostClient
|
|
|
|
requestDuration *metrics.Histogram
|
|
requestsOKCount *metrics.Counter
|
|
errorsCount *metrics.Counter
|
|
retriesCount *metrics.Counter
|
|
|
|
wg sync.WaitGroup
|
|
stopCh chan struct{}
|
|
}
|
|
|
|
func newClient(argIdx int, remoteWriteURL, urlLabelValue string, fq *persistentqueue.FastQueue, concurrency int) *client {
|
|
authHeader := ""
|
|
username := basicAuthUsername.GetOptionalArg(argIdx)
|
|
password := basicAuthPassword.GetOptionalArg(argIdx)
|
|
if len(username) > 0 || len(password) > 0 {
|
|
// See https://en.wikipedia.org/wiki/Basic_access_authentication
|
|
token := username + ":" + password
|
|
token64 := base64.StdEncoding.EncodeToString([]byte(token))
|
|
authHeader = "Basic " + token64
|
|
}
|
|
token := bearerToken.GetOptionalArg(argIdx)
|
|
if len(token) > 0 {
|
|
if authHeader != "" {
|
|
logger.Panicf("FATAL: `-remoteWrite.bearerToken`=%q cannot be set when `-remoteWrite.basicAuth.*` flags are set", token)
|
|
}
|
|
authHeader = "Bearer " + token
|
|
}
|
|
|
|
readTimeout := *sendTimeout
|
|
if readTimeout <= 0 {
|
|
readTimeout = time.Minute
|
|
}
|
|
writeTimeout := readTimeout
|
|
var u fasthttp.URI
|
|
u.Update(remoteWriteURL)
|
|
scheme := string(u.Scheme())
|
|
switch scheme {
|
|
case "http", "https":
|
|
default:
|
|
logger.Panicf("FATAL: unsupported scheme in -remoteWrite.url=%q: %q. It must be http or https", remoteWriteURL, scheme)
|
|
}
|
|
host := string(u.Host())
|
|
if len(host) == 0 {
|
|
logger.Panicf("FATAL: invalid -remoteWrite.url=%q: host cannot be empty. Make sure the url looks like `http://host:port/path`", remoteWriteURL)
|
|
}
|
|
requestURI := string(u.RequestURI())
|
|
isTLS := scheme == "https"
|
|
var tlsCfg *tls.Config
|
|
if isTLS {
|
|
var err error
|
|
tlsCfg, err = getTLSConfig(argIdx)
|
|
if err != nil {
|
|
logger.Panicf("FATAL: cannot initialize TLS config: %s", err)
|
|
}
|
|
}
|
|
if !strings.Contains(host, ":") {
|
|
if isTLS {
|
|
host += ":443"
|
|
} else {
|
|
host += ":80"
|
|
}
|
|
}
|
|
maxConns := 2 * concurrency
|
|
hc := &fasthttp.HostClient{
|
|
Addr: host,
|
|
Name: "vmagent",
|
|
Dial: statDial,
|
|
IsTLS: isTLS,
|
|
TLSConfig: tlsCfg,
|
|
MaxConns: maxConns,
|
|
MaxIdleConnDuration: 10 * readTimeout,
|
|
ReadTimeout: readTimeout,
|
|
WriteTimeout: writeTimeout,
|
|
MaxResponseBodySize: 1024 * 1024,
|
|
}
|
|
c := &client{
|
|
urlLabelValue: urlLabelValue,
|
|
remoteWriteURL: remoteWriteURL,
|
|
host: host,
|
|
requestURI: requestURI,
|
|
authHeader: authHeader,
|
|
fq: fq,
|
|
hc: hc,
|
|
stopCh: make(chan struct{}),
|
|
}
|
|
c.requestDuration = metrics.GetOrCreateHistogram(fmt.Sprintf(`vmagent_remotewrite_duration_seconds{url=%q}`, c.urlLabelValue))
|
|
c.requestsOKCount = metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_requests_total{url=%q, status_code="2XX"}`, c.urlLabelValue))
|
|
c.errorsCount = metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_errors_total{url=%q}`, c.urlLabelValue))
|
|
c.retriesCount = metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_retries_count_total{url=%q}`, c.urlLabelValue))
|
|
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.remoteWriteURL)
|
|
return c
|
|
}
|
|
|
|
func (c *client) MustStop() {
|
|
close(c.stopCh)
|
|
c.wg.Wait()
|
|
logger.Infof("stopped client for -remoteWrite.url=%q", c.remoteWriteURL)
|
|
}
|
|
|
|
func getTLSConfig(argIdx int) (*tls.Config, error) {
|
|
tlsConfig := &promauth.TLSConfig{
|
|
CAFile: tlsCAFile.GetOptionalArg(argIdx),
|
|
CertFile: tlsCertFile.GetOptionalArg(argIdx),
|
|
KeyFile: tlsKeyFile.GetOptionalArg(argIdx),
|
|
ServerName: tlsServerName.GetOptionalArg(argIdx),
|
|
InsecureSkipVerify: *tlsInsecureSkipVerify,
|
|
}
|
|
cfg, err := promauth.NewConfig(".", nil, "", "", tlsConfig)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot populate TLS config: %s", err)
|
|
}
|
|
tlsCfg := cfg.NewTLSConfig()
|
|
return tlsCfg, nil
|
|
}
|
|
|
|
func (c *client) runWorker() {
|
|
var ok bool
|
|
var block []byte
|
|
ch := make(chan struct{})
|
|
for {
|
|
block, ok = c.fq.MustReadBlock(block[:0])
|
|
if !ok {
|
|
return
|
|
}
|
|
go func() {
|
|
c.sendBlock(block)
|
|
ch <- struct{}{}
|
|
}()
|
|
select {
|
|
case <-ch:
|
|
// The block has been sent successfully
|
|
continue
|
|
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 <-ch:
|
|
// The block has been sent successfully.
|
|
case <-time.After(graceDuration):
|
|
logger.Errorf("couldn't sent block with size %d bytes to %q in %.3f seconds during shutdown; dropping it",
|
|
len(block), c.remoteWriteURL, graceDuration.Seconds())
|
|
}
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
func (c *client) sendBlock(block []byte) {
|
|
req := fasthttp.AcquireRequest()
|
|
req.SetRequestURI(c.requestURI)
|
|
req.SetHost(c.host)
|
|
req.Header.SetMethod("POST")
|
|
req.Header.Add("Content-Type", "application/x-protobuf")
|
|
req.Header.Add("Content-Encoding", "snappy")
|
|
req.Header.Add("X-Prometheus-Remote-Write-Version", "0.1.0")
|
|
if c.authHeader != "" {
|
|
req.Header.Set("Authorization", c.authHeader)
|
|
}
|
|
req.SetBody(block)
|
|
|
|
retryDuration := time.Second
|
|
resp := fasthttp.AcquireResponse()
|
|
|
|
again:
|
|
select {
|
|
case <-c.stopCh:
|
|
fasthttp.ReleaseRequest(req)
|
|
fasthttp.ReleaseResponse(resp)
|
|
return
|
|
default:
|
|
}
|
|
|
|
startTime := time.Now()
|
|
err := doRequestWithPossibleRetry(c.hc, req, resp)
|
|
c.requestDuration.UpdateDuration(startTime)
|
|
if err != nil {
|
|
c.errorsCount.Inc()
|
|
retryDuration *= 2
|
|
if retryDuration > time.Minute {
|
|
retryDuration = time.Minute
|
|
}
|
|
logger.Errorf("couldn't send a block with size %d bytes to %q: %s; re-sending the block in %.3f seconds",
|
|
len(block), c.remoteWriteURL, err, retryDuration.Seconds())
|
|
time.Sleep(retryDuration)
|
|
c.retriesCount.Inc()
|
|
goto again
|
|
}
|
|
statusCode := resp.StatusCode()
|
|
if statusCode/100 != 2 {
|
|
metrics.GetOrCreateCounter(fmt.Sprintf(`vmagent_remotewrite_requests_total{url=%q, status_code="%d"}`, c.urlLabelValue, statusCode)).Inc()
|
|
retryDuration *= 2
|
|
if retryDuration > time.Minute {
|
|
retryDuration = time.Minute
|
|
}
|
|
logger.Errorf("unexpected status code received after sending a block with size %d bytes to %q: %d; response body=%q; re-sending the block in %.3f seconds",
|
|
len(block), c.remoteWriteURL, statusCode, resp.Body(), retryDuration.Seconds())
|
|
time.Sleep(retryDuration)
|
|
c.retriesCount.Inc()
|
|
goto again
|
|
}
|
|
c.requestsOKCount.Inc()
|
|
|
|
// The block has been successfully sent to the remote storage.
|
|
fasthttp.ReleaseResponse(resp)
|
|
fasthttp.ReleaseRequest(req)
|
|
}
|
|
|
|
func doRequestWithPossibleRetry(hc *fasthttp.HostClient, req *fasthttp.Request, resp *fasthttp.Response) error {
|
|
// There is no need in calling DoTimeout, since the timeout must be already set in hc.ReadTimeout.
|
|
err := hc.Do(req, resp)
|
|
if err == nil {
|
|
return nil
|
|
}
|
|
if err != fasthttp.ErrConnectionClosed {
|
|
return err
|
|
}
|
|
// Retry request if the server closed the keep-alive connection during the first attempt.
|
|
return hc.Do(req, resp)
|
|
}
|