我有一个Sping Boot REST应用程序，它只是打印Hello world。这工作正常，现在我正在尝试向我的应用程序添加可观察性，所以我安装了一个Kind Kuberntes集群并部署了开放遥测收集器。OpenTelemetry收集器在kind集群中运行，我的Spring Boot应用程序在我的主机上运行。当我的Spring Boot应用程序启动时，它打印以下错误消息：

[OkHttp http://otel-collector-collector.opentelemetry-operator-system.svc.cluster.local:5555/...] 
ERROR io.opentelemetry.exporter.internal.grpc.OkHttpGrpcExporter -
Failed to export metrics. The request could not be executed.
Full error message: otel-collector-collector.opentelemetry-operator-
system.svc.cluster.local: nodename nor servname provided, or not known

我有一个Shell文件，它运行我的应用程序：

mvn clean package -Dmaven.test.skip=true

    AGENT_FILE=opentelemetry-javaagent-all.jar
    if [ ! -f "${AGENT_FILE}" ]; then
      curl -L https://github.com/aws-observability/aws-otel-java- 
    instrumentation/releases/download/v1.19.2/aws-opentelemetry-agent.jar --output 
    ${AGENT_FILE}
    fi

    export OTEL_TRACES_EXPORTER=otlp
    export OTEL_METRICS_EXPORTER=otlp
    export OTEL_EXPORTER_OTLP_ENDPOINT=http://otel-collector-collector.opentelemetry- 
    operator-system.svc.cluster.local:5555

    export OTEL_RESOURCE_ATTRIBUTES=service.name=hello-app,service.version=1.0
    export OTEL_TRACES_SAMPLER=always_on
    export OTEL_IMR_EXPORT_INTERVAL=1000
    export OTEL_METRIC_EXPORT_INTERVAL=1000

    java -javaagent:./${AGENT_FILE} -jar target/hello-app-1.0.jar

我通过操作员安装了OTel收集器：

kubectl apply -f https://github.com/cert-manager/cert-manager/releases/download/v1.10.0/cert-manager.yaml

kubectl apply -f https://github.com/open-telemetry/opentelemetry-operator/releases/latest/download/opentelemetry-operator.yaml

我的OpenTelemetry采集器配置文件为：

apiVersion: opentelemetry.io/v1alpha1
kind: OpenTelemetryCollector
metadata:
  name: otel-collector
  namespace: opentelemetry-operator-system
  labels:
    app: opentelemetry
    component: otel-collector
spec:
  mode: deployment
  config: |
    receivers:
      otlp:
        protocols:
          grpc:
            endpoint: 0.0.0.0:5555
    processors:
      batch:
        timeout: 1s
        send_batch_size: 1024
    exporters:
      prometheus:
        endpoint: 0.0.0.0:6666
      otlp:
        endpoint: http://tempo.monitoring:3100
        tls:
          insecure: true
    service:
      pipelines:
        metrics:
          receivers: [otlp]
          processors: [batch]
          exporters: [prometheus]
        traces:
          receivers: [otlp]
          processors: [batch]
          exporters: [otlp]
      telemetry:
        logs:
          level: debug