7.2. 配置用于从监控堆栈接收指标

配置的 OpenTelemetry Collector 自定义资源(CR)可以设置 Prometheus 接收器从集群监控堆栈中提取指标。

用于从集群监控堆栈中提取指标的 OpenTelemetry Collector CR 示例

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: otel-collector
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-monitoring-view 
subjects:
  - kind: ServiceAccount
    name: otel-collector
    namespace: observability
---
kind: ConfigMap
apiVersion: v1
metadata:
  name: cabundle
  namespace: observability
  annotations:
    service.beta.openshift.io/inject-cabundle: "true" 
---
apiVersion: opentelemetry.io/v1beta1
kind: OpenTelemetryCollector
metadata:
  name: otel
  namespace: observability
spec:
  volumeMounts:
    - name: cabundle-volume
      mountPath: /etc/pki/ca-trust/source/service-ca
      readOnly: true
  volumes:
    - name: cabundle-volume
      configMap:
        name: cabundle
  mode: deployment
  config:
    receivers:
      prometheus: 
        config:
          scrape_configs:
            - job_name: 'federate'
              scrape_interval: 15s
              scheme: https
              tls_config:
                ca_file: /etc/pki/ca-trust/source/service-ca/service-ca.crt
              bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
              honor_labels: false
              params:
                'match[]':
                  - '{__name__="<metric_name>"}' 
              metrics_path: '/federate'
              static_configs:
                - targets:
                  - "prometheus-k8s.openshift-monitoring.svc.cluster.local:9091"
    exporters:
      debug: 
        verbosity: detailed
    service:
      pipelines:
        metrics:
          receivers: [prometheus]
          processors: []
          exporters: [debug]

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
  name: otel-collector
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-monitoring-view


subjects:
  - kind: ServiceAccount
    name: otel-collector
    namespace: observability
---
kind: ConfigMap
apiVersion: v1
metadata:
  name: cabundle
  namespace: observability
  annotations:
    service.beta.openshift.io/inject-cabundle: "true"


---
apiVersion: opentelemetry.io/v1beta1
kind: OpenTelemetryCollector
metadata:
  name: otel
  namespace: observability
spec:
  volumeMounts:
    - name: cabundle-volume
      mountPath: /etc/pki/ca-trust/source/service-ca
      readOnly: true
  volumes:
    - name: cabundle-volume
      configMap:
        name: cabundle
  mode: deployment
  config:
    receivers:
      prometheus:


        config:
          scrape_configs:
            - job_name: 'federate'
              scrape_interval: 15s
              scheme: https
              tls_config:
                ca_file: /etc/pki/ca-trust/source/service-ca/service-ca.crt
              bearer_token_file: /var/run/secrets/kubernetes.io/serviceaccount/token
              honor_labels: false
              params:
                'match[]':
                  - '{__name__="<metric_name>"}'


              metrics_path: '/federate'
              static_configs:
                - targets:
                  - "prometheus-k8s.openshift-monitoring.svc.cluster.local:9091"
    exporters:
      debug:


        verbosity: detailed
    service:
      pipelines:
        metrics:
          receivers: [prometheus]
          processors: []
          exporters: [debug]

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1: 将 cluster-monitoring-view 集群角色分配给 OpenTelemetry Collector 的服务帐户，以便它可以访问指标数据。
2: 注入 OpenShift 服务 CA，用于在 Prometheus 接收器中配置 TLS。
3: 配置 Prometheus 接收器，以从集群内监控堆栈中提取 federate 端点。
4: 使用 Prometheus 查询语言选择要提取的指标。有关联合端点的详情和限制，请参阅集群监控文档。
5: 配置 debug exporter，将指标输出到标准输出。

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7.2. 配置用于从监控堆栈接收指标

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