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lib/promscrape: add -promscrape.disableKeepAlive command-line flag for disabling http keep-alive connections when scraping targets

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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/580
This commit is contained in:
Aliaksandr Valialkin 2020-07-01 02:19:58 +03:00
parent aa26b94f33
commit 0f754bea49
1 changed files with 5 additions and 0 deletions
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5
lib/promscrape/client.go
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@ -16,6 +16,8 @@ var (
"Bigger responses are rejected")
disableCompression = flag.Bool("promscrape.disableCompression", false, "Whether to disable sending 'Accept-Encoding: gzip' request headers to scrape targets. "+
"This may reduce CPU usage on scrape targets at the cost of higher network bandwidth utilization")
disableKeepAlive = flag.Bool("promscrape.disableKeepAlive", false, "Whether to disable HTTP keep-alive connections when scraping targets. This may be useful when targets "+
"has no support for HTTP keep-alive connection. Note that disabling HTTP keep-alive may increase load on both vmagent and scrape targets")
)
type client struct {
@ -73,6 +75,9 @@ func (c *client) ReadData(dst []byte) ([]byte, error) {
if !*disableCompression {
req.Header.Set("Accept-Encoding", "gzip")
}
if *disableKeepAlive {
req.SetConnectionClose()
}
if c.authHeader != "" {
req.Header.Set("Authorization", c.authHeader)
}