The go programm in otel-collector example not working

[koktlzz]

Description

I use the example go programm to generdate trace data, but it does noting. Here is the output:

[root@gwr-k8s-04 otel-collector]# go run main.go 
2021/09/09 01:11:13 Waiting for connection...

Environment

• OS: CentOS Linux release 7.9.2009 (Core)
• Architecture: x86_64
• Go Version: 1.15.15
• Opentelemetry-collector Image Version: 0.6.0

Steps To Reproduce

I follow the document to configure and run the program.

Expected behavior

The output should contain logs such as "Doing really hard work".

[XSAM]

It seems like the collector is not listening in the <node-ip>:30080, which causes these lines to keep blocking.

opentelemetry-go/example/otel-collector/main.go

Lines 58 to 62 in df2bdbb

	traceExporter, err := otlptracegrpc.New(ctx,
	otlptracegrpc.WithInsecure(),
	otlptracegrpc.WithEndpoint("localhost:30080"),
	otlptracegrpc.WithDialOption(grpc.WithBlock()),
	)

[koktlzz]

It seems like the collector is not listening in the <node-ip>:30080, which causes these lines to keep blocking.

opentelemetry-go/example/otel-collector/main.go

Lines 58 to 62 in df2bdbb

	traceExporter, err := otlptracegrpc.New(ctx,
	otlptracegrpc.WithInsecure(),
	otlptracegrpc.WithEndpoint("localhost:30080"),
	otlptracegrpc.WithDialOption(grpc.WithBlock()),
	)

Thanks for your reply. The NodePort Service otel-collector is already listening the 30080 port:

[root@gwr-k8s-01 ~]# kubectl get svc -n observability 
NAME                        TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)                                  AGE
jaeger-agent                ClusterIP   None            <none>        5775/UDP,5778/TCP,6831/UDP,6832/UDP      29h
jaeger-collector            ClusterIP   10.107.76.37    <none>        9411/TCP,14250/TCP,14267/TCP,14268/TCP   29h
jaeger-collector-headless   ClusterIP   None            <none>        9411/TCP,14250/TCP,14267/TCP,14268/TCP   29h
jaeger-operator-metrics     ClusterIP   10.103.59.255   <none>        8383/TCP,8686/TCP                        32h
jaeger-query                ClusterIP   10.107.52.216   <none>        16686/TCP,16685/TCP                      29h
otel-collector              NodePort    10.108.52.231   <none>        4317:30080/TCP,8889:31865/TCP  

And the otel-collector pod is runnig without any error logs:

[root@gwr-k8s-01 ~]# kubectl logs otel-collector-77d6fcc9d8-9297f -n observability 
{"level":"info","ts":1631166628.7255526,"caller":"service/service.go:416","msg":"Starting OpenTelemetry Collector...","Version":"latest","GitHash":"781aa072","NumCPU":4}
{"level":"info","ts":1631166628.7387753,"caller":"service/service.go:600","msg":"Using memory ballast","MiBs":683}
{"level":"info","ts":1631166628.7389457,"caller":"service/service.go:256","msg":"Setting up own telemetry..."}
{"level":"info","ts":1631166628.7395058,"caller":"service/telemetry.go:98","msg":"Serving Prometheus metrics","address":":8888","legacy_metrics":false,"new_metrics":true,"level":3,"service.instance.id":"ca520166-d0eb-44ea-936c-2e7a43635aae"}
{"level":"info","ts":1631166628.739889,"caller":"service/service.go:293","msg":"Loading configuration..."}
{"level":"info","ts":1631166628.7414753,"caller":"service/service.go:304","msg":"Applying configuration..."}
{"level":"info","ts":1631166628.741536,"caller":"service/service.go:325","msg":"Starting extensions..."}
{"level":"info","ts":1631166628.741546,"caller":"builder/extensions_builder.go:53","msg":"Extension is starting...","component_kind":"extension","component_type":"health_check","component_name":"health_check"}
{"level":"info","ts":1631166628.7415638,"caller":"healthcheckextension/healthcheckextension.go:40","msg":"Starting health_check extension","component_kind":"extension","config":{"TypeVal":"health_check","NameVal":"health_check","Port":13133}}
{"level":"info","ts":1631166628.7418976,"caller":"builder/extensions_builder.go:59","msg":"Extension started.","component_kind":"extension","component_type":"health_check","component_name":"health_check"}
{"level":"info","ts":1631166628.742107,"caller":"builder/exporters_builder.go:302","msg":"Exporter is enabled.","component_kind":"exporter","exporter":"jaeger"}
{"level":"info","ts":1631166628.7421825,"caller":"builder/exporters_builder.go:302","msg":"Exporter is enabled.","component_kind":"exporter","exporter":"prometheus"}
{"level":"info","ts":1631166628.742306,"caller":"builder/exporters_builder.go:302","msg":"Exporter is enabled.","component_kind":"exporter","exporter":"logging"}
{"level":"info","ts":1631166628.742336,"caller":"service/service.go:340","msg":"Starting exporters..."}
{"level":"info","ts":1631166628.7423434,"caller":"builder/exporters_builder.go:90","msg":"Exporter is starting...","component_kind":"exporter","component_type":"jaeger","component_name":"jaeger"}
{"level":"info","ts":1631166628.7423515,"caller":"builder/exporters_builder.go:95","msg":"Exporter started.","component_kind":"exporter","component_type":"jaeger","component_name":"jaeger"}
{"level":"info","ts":1631166628.7423568,"caller":"builder/exporters_builder.go:90","msg":"Exporter is starting...","component_kind":"exporter","component_type":"prometheus","component_name":"prometheus"}
{"level":"info","ts":1631166628.7423666,"caller":"builder/exporters_builder.go:95","msg":"Exporter started.","component_kind":"exporter","component_type":"prometheus","component_name":"prometheus"}
{"level":"info","ts":1631166628.7423708,"caller":"builder/exporters_builder.go:90","msg":"Exporter is starting...","component_kind":"exporter","component_type":"logging","component_name":"logging"}
{"level":"info","ts":1631166628.7423751,"caller":"builder/exporters_builder.go:95","msg":"Exporter started.","component_kind":"exporter","component_type":"logging","component_name":"logging"}
{"level":"info","ts":1631166628.7423866,"caller":"builder/pipelines_builder.go:205","msg":"Pipeline is enabled.","pipeline_name":"traces","pipeline_datatype":"traces"}
{"level":"info","ts":1631166628.742414,"caller":"builder/pipelines_builder.go:205","msg":"Pipeline is enabled.","pipeline_name":"metrics","pipeline_datatype":"metrics"}
{"level":"info","ts":1631166628.7424238,"caller":"service/service.go:353","msg":"Starting processors..."}
{"level":"info","ts":1631166628.7424297,"caller":"builder/pipelines_builder.go:52","msg":"Pipeline is starting...","pipeline_name":"traces","pipeline_datatype":"traces"}
{"level":"info","ts":1631166628.7424345,"caller":"builder/pipelines_builder.go:62","msg":"Pipeline is started.","pipeline_name":"traces","pipeline_datatype":"traces"}
{"level":"info","ts":1631166628.7424433,"caller":"builder/pipelines_builder.go:52","msg":"Pipeline is starting...","pipeline_name":"metrics","pipeline_datatype":"metrics"}
{"level":"info","ts":1631166628.7424476,"caller":"builder/pipelines_builder.go:62","msg":"Pipeline is started.","pipeline_name":"metrics","pipeline_datatype":"metrics"}
{"level":"info","ts":1631166628.7424963,"caller":"builder/receivers_builder.go:234","msg":"Receiver is enabled.","component_kind":"receiver","component_type":"otlp","component_name":"otlp","datatype":"traces"}
{"level":"info","ts":1631166628.742516,"caller":"builder/receivers_builder.go:234","msg":"Receiver is enabled.","component_kind":"receiver","component_type":"otlp","component_name":"otlp","datatype":"metrics"}
{"level":"info","ts":1631166628.7425404,"caller":"service/service.go:365","msg":"Starting receivers..."}
{"level":"info","ts":1631166628.7425475,"caller":"builder/receivers_builder.go:74","msg":"Receiver is starting...","component_kind":"receiver","component_type":"otlp","component_name":"otlp"}
{"level":"info","ts":1631166628.7425902,"caller":"builder/receivers_builder.go:79","msg":"Receiver started.","component_kind":"receiver","component_type":"otlp","component_name":"otlp"}
{"level":"info","ts":1631166628.7426033,"caller":"healthcheck/handler.go:128","msg":"Health Check state change","component_kind":"extension","status":"ready"}
{"level":"info","ts":1631166628.7426178,"caller":"service/service.go:268","msg":"Everything is ready. Begin running and processing data."}

[MrAlias]

Is the kubernetes cluster running locally and listening on the local network? Does netstat show something listening on 30080?

[koktlzz]

Is the kubernetes cluster running locally and listening on the local network? Does netstat show something listening on 30080?

Seems my k8s cluster goes wrong. Thanks for your reply.