12.2. 在没有 sidecar 的情况下迁移

流程

1. 配置 OpenTelemetry Collector 部署。

2. 创建部署 OpenTelemetry Collector 的项目。

   apiVersion: project.openshift.io/v1
   kind: Project
   metadata:
     name: observability

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3. 创建用于运行 OpenTelemetry Collector 实例的服务帐户。

   apiVersion: v1
   kind: ServiceAccount
   metadata:
     name: otel-collector-deployment
     namespace: observability

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4. 创建集群角色，以设置处理器所需的权限。

   apiVersion: rbac.authorization.k8s.io/v1
   kind: ClusterRole
   metadata:
     name: otel-collector
   rules:
     

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   - apiGroups: ["", "config.openshift.io"]
     resources: ["pods", "namespaces", "infrastructures", "infrastructures/status"]
     verbs: ["get", "watch", "list"]

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   k8sattributesprocessor 需要 pods 和 namespaces 资源的权限。

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   resourcedetectionprocessor 需要 infrastructures 和 infrastructures/status 的权限。

5. 创建 ClusterRoleBinding 来为服务帐户设置权限。

   apiVersion: rbac.authorization.k8s.io/v1
   kind: ClusterRoleBinding
   metadata:
     name: otel-collector
   subjects:
   - kind: ServiceAccount
     name: otel-collector-deployment
     namespace: observability
   roleRef:
     kind: ClusterRole
     name: otel-collector
     apiGroup: rbac.authorization.k8s.io

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6. 创建 OpenTelemetry Collector 实例。

   注意

   此收集器会将 trace 导出至 TempoStack 实例。您必须使用 Red Hat Tempo Operator 创建 TempoStack 实例，并放在正确的端点中。

   apiVersion: opentelemetry.io/v1beta1
   kind: OpenTelemetryCollector
   metadata:
     name: otel
     namespace: observability
   spec:
     mode: deployment
     serviceAccount: otel-collector-deployment
     config:
       receivers:
         jaeger:
           protocols:
             grpc: {}
             thrift_binary: {}
             thrift_compact: {}
             thrift_http: {}
       processors:
         batch: {}
         k8sattributes: {}
         memory_limiter:
           check_interval: 1s
           limit_percentage: 50
           spike_limit_percentage: 30
         resourcedetection:
           detectors: [openshift]
       exporters:
         otlp:
           endpoint: "tempo-example-gateway:8090"
           tls:
             insecure: true
       service:
         pipelines:
           traces:
             receivers: [jaeger]
             processors: [memory_limiter, k8sattributes, resourcedetection, batch]
             exporters: [otlp]

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7. 将追踪端点指向 OpenTelemetry Operator。

8. 如果您要将 trace 直接从应用程序导出到 Jaeger，请将 API 端点从 Jaeger 端点改为 OpenTelemetry Collector 端点。

   使用带有 Golang 的 jaegerexporter 导出 trace 的示例

   exp, err := jaeger.New(jaeger.WithCollectorEndpoint(jaeger.WithEndpoint(url))) 

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   URL 指向 OpenTelemetry Collector API 端点。