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main.go
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main.go
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package main
import (
"expvar"
"log"
"net/http"
_ "net/http/pprof"
"os"
envstruct "code.cloudfoundry.org/go-envstruct"
"code.cloudfoundry.org/log-cache/internal/metrics"
. "code.cloudfoundry.org/log-cache/internal/nozzle"
"google.golang.org/grpc"
loggregator "code.cloudfoundry.org/go-loggregator"
)
func main() {
log.SetFlags(log.LstdFlags | log.Lmicroseconds)
log.Print("Starting LogCache Nozzle...")
defer log.Print("Closing LogCache Nozzle.")
cfg, err := LoadConfig()
if err != nil {
log.Fatalf("invalid configuration: %s", err)
}
envstruct.WriteReport(cfg)
tlsCfg, err := loggregator.NewEgressTLSConfig(
cfg.LogsProviderTLS.LogProviderCA,
cfg.LogsProviderTLS.LogProviderCert,
cfg.LogsProviderTLS.LogProviderKey,
)
if err != nil {
log.Fatalf("invalid LogsProviderTLS configuration: %s", err)
}
m := metrics.New(expvar.NewMap("Nozzle"))
loggr := log.New(os.Stderr, "[LOGGR] ", log.LstdFlags)
dropped := m.NewCounter("Dropped")
streamConnector := loggregator.NewEnvelopeStreamConnector(
cfg.LogProviderAddr,
tlsCfg,
loggregator.WithEnvelopeStreamLogger(loggr),
loggregator.WithEnvelopeStreamBuffer(10000, func(missed int) {
loggr.Printf("dropped %d envelope batches", missed)
dropped(uint64(missed))
}),
)
nozzle := NewNozzle(
streamConnector,
cfg.LogCacheAddr,
cfg.ShardId,
WithNozzleLogger(log.New(os.Stderr, "", log.LstdFlags)),
WithNozzleMetrics(m),
WithNozzleDialOpts(
grpc.WithTransportCredentials(
cfg.LogCacheTLS.Credentials("log-cache"),
),
),
WithNozzleSelectors(cfg.Selectors...),
)
go nozzle.Start()
// health endpoints (pprof and expvar)
log.Printf("Health: %s", http.ListenAndServe(cfg.HealthAddr, nil))
}