3.7. 目标分配器

目标分配器是 OpenTelemetry Operator 的一个可选组件，它会在部署的 OpenTelemetry Collector 实例间分片提取目标。目标分配器与 Prometheus PodMonitor 和 ServiceMonitor 自定义资源 (CR) 集成。启用目标分配器时，OpenTelemetry Operator 会将 http_sd_config 字段添加到连接到目标分配器服务的启用的 prometheus 接收器。

重要

目标分配器只是一个技术预览功能。技术预览功能不受红帽产品服务等级协议（SLA）支持，且功能可能并不完整。红帽不推荐在生产环境中使用它们。这些技术预览功能可以使用户提早试用新的功能，并有机会在开发阶段提供反馈意见。

有关红帽技术预览功能支持范围的更多信息，请参阅技术预览功能支持范围。

带有启用的 Target Allocator 的 OpenTelemetryCollector CR 示例

apiVersion: opentelemetry.io/v1beta1
kind: OpenTelemetryCollector
metadata:
  name: otel
  namespace: observability
spec:
  mode: statefulset 
  targetAllocator:
    enabled: true 
    serviceAccount: 
    prometheusCR:
      enabled: true 
      scrapeInterval: 10s
      serviceMonitorSelector: 
        name: app1
      podMonitorSelector: 
        name: app2
  config:
    receivers:
      prometheus: 
        config:
          scrape_configs: []
    processors:
    exporters:
      debug: {}
    service:
      pipelines:
        metrics:
          receivers: [prometheus]
          processors: []
          exporters: [debug]
# ...

apiVersion: opentelemetry.io/v1beta1
kind: OpenTelemetryCollector
metadata:
  name: otel
  namespace: observability
spec:
  mode: statefulset


  targetAllocator:
    enabled: true


    serviceAccount:


    prometheusCR:
      enabled: true


      scrapeInterval: 10s
      serviceMonitorSelector:


        name: app1
      podMonitorSelector:


        name: app2
  config:
    receivers:
      prometheus:


        config:
          scrape_configs: []
    processors:
    exporters:
      debug: {}
    service:
      pipelines:
        metrics:
          receivers: [prometheus]
          processors: []
          exporters: [debug]
# ...

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1: 启用 Target Allocator 时，部署模式必须设置为 statefulset。
2: 启用目标分配器。默认值为 false。
3: Target Allocator 部署的服务帐户名称。服务帐户需要具有 RBAC 才能从集群中获取 ServiceMonitor、PodMonitor 自定义资源和其他对象，以便在提取的指标上正确设置标签。默认服务名称为 <collector_name>-targetallocator。
4: 启用与 Prometheus PodMonitor 和 ServiceMonitor 自定义资源集成。
5: Prometheus ServiceMonitor 自定义资源的标签选择器。当留空时，请启用所有服务监视器。
6: Prometheus PodMonitor 自定义资源的标签选择器。留空时，启用所有 pod 监视器。
7: Prometheus 接收器带有 minimal, empty scrape_config: [] 配置选项。

Target Allocator 部署使用 Kubernetes API 从集群中获取相关对象，因此它需要自定义 RBAC 配置。

目标 Allocator 服务帐户的 RBAC 配置

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: otel-targetallocator
rules:
  - apiGroups: [""]
    resources:
      - services
      - pods
      - namespaces
    verbs: ["get", "list", "watch"]
  - apiGroups: ["monitoring.coreos.com"]
    resources:
      - servicemonitors
      - podmonitors
      - scrapeconfigs
      - probes
    verbs: ["get", "list", "watch"]
  - apiGroups: ["discovery.k8s.io"]
    resources:
      - endpointslices
    verbs: ["get", "list", "watch"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: otel-targetallocator
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: otel-targetallocator
subjects:
  - kind: ServiceAccount
    name: otel-targetallocator 
    namespace: observability 
# ...

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: otel-targetallocator
rules:
  - apiGroups: [""]
    resources:
      - services
      - pods
      - namespaces
    verbs: ["get", "list", "watch"]
  - apiGroups: ["monitoring.coreos.com"]
    resources:
      - servicemonitors
      - podmonitors
      - scrapeconfigs
      - probes
    verbs: ["get", "list", "watch"]
  - apiGroups: ["discovery.k8s.io"]
    resources:
      - endpointslices
    verbs: ["get", "list", "watch"]
---
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: otel-targetallocator
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: otel-targetallocator
subjects:
  - kind: ServiceAccount
    name: otel-targetallocator


    namespace: observability


# ...

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1: 目标 Allocator 服务帐户的名称。
2: Target Allocator 服务帐户的命名空间。

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3.7. 目标分配器

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