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Add flag to send request to another endpoint instead of the FQDN #102

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Add flag to send request to another endpoint instead of the FQDN #102

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18 changes: 12 additions & 6 deletions cmd/client/main.go
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Original file line number Diff line number Diff line change
Expand Up @@ -43,12 +43,13 @@ import (
)

var (
myFqdn = kingpin.Flag("fqdn", "FQDN to register with").Default(fqdn.Get()).String()
proxyURL = kingpin.Flag("proxy-url", "Push proxy to talk to.").Required().String()
caCertFile = kingpin.Flag("tls.cacert", "<file> CA certificate to verify peer against").String()
tlsCert = kingpin.Flag("tls.cert", "<cert> Client certificate file").String()
tlsKey = kingpin.Flag("tls.key", "<key> Private key file").String()
metricsAddr = kingpin.Flag("metrics-addr", "Serve Prometheus metrics at this address").Default(":9369").String()
myFqdn = kingpin.Flag("fqdn", "FQDN to register with").Default(fqdn.Get()).String()
proxyURL = kingpin.Flag("proxy-url", "Push proxy to talk to.").Required().String()
caCertFile = kingpin.Flag("tls.cacert", "<file> CA certificate to verify peer against").String()
tlsCert = kingpin.Flag("tls.cert", "<cert> Client certificate file").String()
tlsKey = kingpin.Flag("tls.key", "<key> Private key file").String()
metricsAddr = kingpin.Flag("metrics-addr", "Serve Prometheus metrics at this address").Default(":9369").String()
internalEndpoint = kingpin.Flag("internal-endpoint", "If set, requests will be forwarded to this endpoint").String()

retryInitialWait = kingpin.Flag("proxy.retry.initial-wait", "Amount of time to wait after proxy failure").Default("1s").Duration()
retryMaxWait = kingpin.Flag("proxy.retry.max-wait", "Maximum amount of time to wait between proxy poll retries").Default("5s").Duration()
Expand Down Expand Up @@ -133,6 +134,11 @@ func (c *Coordinator) doScrape(request *http.Request, client *http.Client) {
return
}

if *internalEndpoint != "" {
newHost := fmt.Sprintf("%s:%s", *internalEndpoint, request.URL.Port())
request.URL.Host = newHost
}

scrapeResp, err := client.Do(request)
if err != nil {
msg := fmt.Sprintf("failed to scrape %s", request.URL.String())
Expand Down