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app/vmagent: allow setting -httpListenAddr to empty string in order to disable listening for http requests

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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/340
This commit is contained in:
Aliaksandr Valialkin 2020-02-26 20:57:51 +02:00
parent 8c2d396e8a
commit 0597f1e39a
1 changed files with 12 additions and 6 deletions
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18
app/vmagent/main.go
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@ -29,7 +29,9 @@ import (
) )
var ( var (
httpListenAddr = flag.String("httpListenAddr", ":8429", "TCP address to listen for http connections") httpListenAddr = flag.String("httpListenAddr", ":8429", "TCP address to listen for http connections. "+
"Set this flag to empty value in order to disable listening on any port. This mode may be useful for running multiple vmagent instances on the same server. "+
"Note that /targets and /metrics pages aren't available if -httpListenAddr=''")
influxListenAddr = flag.String("influxListenAddr", "", "TCP and UDP address to listen for Influx line protocol data. Usually :8189 must be set. Doesn't work if empty") influxListenAddr = flag.String("influxListenAddr", "", "TCP and UDP address to listen for Influx line protocol data. Usually :8189 must be set. Doesn't work if empty")
graphiteListenAddr = flag.String("graphiteListenAddr", "", "TCP and UDP address to listen for Graphite plaintext data. Usually :2003 must be set. Doesn't work if empty") graphiteListenAddr = flag.String("graphiteListenAddr", "", "TCP and UDP address to listen for Graphite plaintext data. Usually :2003 must be set. Doesn't work if empty")
opentsdbListenAddr = flag.String("opentsdbListenAddr", "", "TCP and UDP address to listen for OpentTSDB metrics. "+ opentsdbListenAddr = flag.String("opentsdbListenAddr", "", "TCP and UDP address to listen for OpentTSDB metrics. "+
@ -68,18 +70,22 @@ func main() {
promscrape.Init(remotewrite.Push) promscrape.Init(remotewrite.Push)
go httpserver.Serve(*httpListenAddr, requestHandler) if len(*httpListenAddr) > 0 {
go httpserver.Serve(*httpListenAddr, requestHandler)
}
logger.Infof("started vmagent in %.3f seconds", time.Since(startTime).Seconds()) logger.Infof("started vmagent in %.3f seconds", time.Since(startTime).Seconds())
sig := procutil.WaitForSigterm() sig := procutil.WaitForSigterm()
logger.Infof("received signal %s", sig) logger.Infof("received signal %s", sig)
logger.Infof("gracefully shutting down webservice at %q", *httpListenAddr)
startTime = time.Now() startTime = time.Now()
if err := httpserver.Stop(*httpListenAddr); err != nil { if len(*httpListenAddr) > 0 {
logger.Fatalf("cannot stop the webservice: %s", err) logger.Infof("gracefully shutting down webservice at %q", *httpListenAddr)
if err := httpserver.Stop(*httpListenAddr); err != nil {
logger.Fatalf("cannot stop the webservice: %s", err)
}
logger.Infof("successfully shut down the webservice in %.3f seconds", time.Since(startTime).Seconds())
} }
logger.Infof("successfully shut down the webservice in %.3f seconds", time.Since(startTime).Seconds())
promscrape.Stop() promscrape.Stop()