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第 8 章 托管 control plane Observability

您可以通过配置指标集来收集托管 control plane 的指标。HyperShift Operator 可以为它管理的每个托管集群在管理集群中创建或删除监控仪表板。

8.1. 为托管 control plane 配置指标集
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为 Red Hat OpenShift Container Platform 托管 control plane 会在每个 control plane 命名空间中创建 ServiceMonitor 资源，允许 Prometheus 堆栈从 control plane 收集指标。ServiceMonitor 资源使用指标重新标记来定义从特定组件（如 etcd 或 Kubernetes API 服务器）包含或排除哪些指标。control plane 生成的指标数量会直接影响收集它们的监控堆栈的资源要求。

您可以配置一个指标集来标识为每个 control plane 生成的一组指标，而不是生成固定的指标数量。支持以下指标集：

  • Telemetry ：遥测需要这些指标。这个集合是默认设置，是最小指标集合。
  • SRE ：此集合包含生成警报并允许对 control plane 组件的故障排除所需的指标。
  • All ：此集合包括由独立 OpenShift Container Platform control plane 组件生成的所有指标。

要配置指标集，请输入以下命令在 HyperShift Operator 部署中设置 METRICS_SET 环境变量： 

$ oc set env -n hypershift deployment/operator METRICS_SET=All
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8.1.1. 配置 SRE 指标集
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当您指定 SRE 指标集时，HyperShift Operator 会查找带有一个键 config 的名为 sre-metric-set 的配置映射。config 键的值必须包含一组由 control plane 组件组织的 RelabelConfigs。

您可以指定以下组件：

  • etcd
  • kubeAPIServer
  • kubeControllerManager
  • openshiftAPIServer
  • openshiftControllerManager
  • openshiftRouteControllerManager
  • cvo
  • olm
  • catalogOperator
  • registryOperator
  • nodeTuningOperator
  • controlPlaneOperator
  • hostedClusterConfigOperator

以下示例中演示了 SRE 指标集的配置： 

kubeAPIServer:
  - action:       "drop"
    regex:        "etcd_(debugging|disk|server).*"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "apiserver_admission_controller_admission_latencies_seconds_.*"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "apiserver_admission_step_admission_latencies_seconds_.*"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "scheduler_(e2e_scheduling_latency_microseconds|scheduling_algorithm_predicate_evaluation|scheduling_algorithm_priority_evaluation|scheduling_algorithm_preemption_evaluation|scheduling_algorithm_latency_microseconds|binding_latency_microseconds|scheduling_latency_seconds)"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "apiserver_(request_count|request_latencies|request_latencies_summary|dropped_requests|storage_data_key_generation_latencies_microseconds|storage_transformation_failures_total|storage_transformation_latencies_microseconds|proxy_tunnel_sync_latency_secs)"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "docker_(operations|operations_latency_microseconds|operations_errors|operations_timeout)"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "reflector_(items_per_list|items_per_watch|list_duration_seconds|lists_total|short_watches_total|watch_duration_seconds|watches_total)"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "etcd_(helper_cache_hit_count|helper_cache_miss_count|helper_cache_entry_count|request_cache_get_latencies_summary|request_cache_add_latencies_summary|request_latencies_summary)"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "transformation_(transformation_latencies_microseconds|failures_total)"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "network_plugin_operations_latency_microseconds|sync_proxy_rules_latency_microseconds|rest_client_request_latency_seconds"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "apiserver_request_duration_seconds_bucket;(0.15|0.25|0.3|0.35|0.4|0.45|0.6|0.7|0.8|0.9|1.25|1.5|1.75|2.5|3|3.5|4.5|6|7|8|9|15|25|30|50)"
    sourceLabels: ["__name__", "le"]
kubeControllerManager:
  - action:       "drop"
    regex:        "etcd_(debugging|disk|request|server).*"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "rest_client_request_latency_seconds_(bucket|count|sum)"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "root_ca_cert_publisher_sync_duration_seconds_(bucket|count|sum)"
    sourceLabels: ["__name__"]
openshiftAPIServer:
  - action:       "drop"
    regex:        "etcd_(debugging|disk|server).*"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "apiserver_admission_controller_admission_latencies_seconds_.*"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "apiserver_admission_step_admission_latencies_seconds_.*"
    sourceLabels: ["__name__"]
  - action:       "drop"
    regex:        "apiserver_request_duration_seconds_bucket;(0.15|0.25|0.3|0.35|0.4|0.45|0.6|0.7|0.8|0.9|1.25|1.5|1.75|2.5|3|3.5|4.5|6|7|8|9|15|25|30|50)"
    sourceLabels: ["__name__", "le"]
openshiftControllerManager:
  - action:       "drop"
    regex:        "etcd_(debugging|disk|request|server).*"
    sourceLabels: ["__name__"]
openshiftRouteControllerManager:
  - action:       "drop"
    regex:        "etcd_(debugging|disk|request|server).*"
    sourceLabels: ["__name__"]
olm:
  - action:       "drop"
    regex:        "etcd_(debugging|disk|server).*"
    sourceLabels: ["__name__"]
catalogOperator:
  - action:       "drop"
    regex:        "etcd_(debugging|disk|server).*"
    sourceLabels: ["__name__"]
cvo:
  - action: drop
    regex: "etcd_(debugging|disk|server).*"
    sourceLabels: ["__name__"]
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