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main.go
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main.go
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// envelopeemitter: a tool to emit envelopes via v2 gRPC
//
package main
import (
"context"
"flag"
"log"
"time"
"code.cloudfoundry.org/go-loggregator/rpc/loggregator_v2"
"code.cloudfoundry.org/loggregator-release/src/plumbing"
"google.golang.org/grpc"
)
var (
addr = flag.String("addr", "localhost:3458", "address to connect for gRPC")
certFile = flag.String("cert", "", "cert to use to connect for gRPC")
keyFile = flag.String("key", "", "key to use to connect for gRPC")
caFile = flag.String("ca", "", "ca cert to use to connect for gRPC")
srcID = flag.String("source-id", "", "envelope source ID")
value = flag.Float64("value", 0.0, "a value")
)
func main() {
flag.Parse()
creds, err := plumbing.NewClientCredentials(*certFile, *keyFile, *caFile, "metron")
if err != nil {
log.Fatal(err)
}
conn, err := grpc.Dial(*addr, grpc.WithTransportCredentials(creds))
if err != nil {
log.Fatal(err)
}
defer conn.Close()
c := loggregator_v2.NewIngressClient(conn)
// create env
env := &loggregator_v2.Envelope{
SourceId: *srcID,
Message: &loggregator_v2.Envelope_Gauge{
Gauge: &loggregator_v2.Gauge{
Metrics: map[string]*loggregator_v2.GaugeValue{
"test-metric": &loggregator_v2.GaugeValue{
Value: *value,
},
},
},
},
}
sender, err := c.Sender(context.TODO())
if err != nil {
log.Fatal(err)
}
for {
err := sender.Send(env)
if err != nil {
log.Fatal(err)
}
time.Sleep(time.Second)
log.Printf("emmiting a gauge")
}
}