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This document has an older update date than the original, so the information it contains may be out of date. If you're able to read English, see the English version for the most up-to-date information: Kubernetes Component SLI Metrics
Kubernetes 组件 SLI 指标
特性状态：
Kubernetes v1.27 [beta]
默认情况下，Kubernetes 1.30 会为每个 Kubernetes 组件的二进制文件发布服务等级指标（SLI）。
此指标端点被暴露在每个组件提供 HTTPS 服务的端口上，路径为 /metrics/slis。
从 v1.27 版本开始，对每个 Kubernetes 组件而言，
ComponentSLIs 特性门控都是默认启用的。
SLI 指标
启用 SLI 指标时，每个 Kubernetes 组件暴露两个指标，按照健康检查添加标签：
- 计量值（表示健康检查的当前状态）
- 计数值（记录观察到的每个健康检查状态的累计次数）
你可以使用此指标信息计算每个组件的可用性统计信息。例如，API 服务器检查 etcd 的健康。 你可以计算并报告 etcd 的可用或不可用情况，具体由其客户端（即 API 服务器）进行报告。
Prometheus 计量表数据看起来类似于：
# HELP kubernetes_healthcheck [ALPHA] This metric records the result of a single healthcheck.
# TYPE kubernetes_healthcheck gauge
kubernetes_healthcheck{name="autoregister-completion",type="healthz"} 1
kubernetes_healthcheck{name="autoregister-completion",type="readyz"} 1
kubernetes_healthcheck{name="etcd",type="healthz"} 1
kubernetes_healthcheck{name="etcd",type="readyz"} 1
kubernetes_healthcheck{name="etcd-readiness",type="readyz"} 1
kubernetes_healthcheck{name="informer-sync",type="readyz"} 1
kubernetes_healthcheck{name="log",type="healthz"} 1
kubernetes_healthcheck{name="log",type="readyz"} 1
kubernetes_healthcheck{name="ping",type="healthz"} 1
kubernetes_healthcheck{name="ping",type="readyz"} 1
而计数器数据看起来类似于：
# HELP kubernetes_healthchecks_total [ALPHA] This metric records the results of all healthcheck.
# TYPE kubernetes_healthchecks_total counter
kubernetes_healthchecks_total{name="autoregister-completion",status="error",type="readyz"} 1
kubernetes_healthchecks_total{name="autoregister-completion",status="success",type="healthz"} 15
kubernetes_healthchecks_total{name="autoregister-completion",status="success",type="readyz"} 14
kubernetes_healthchecks_total{name="etcd",status="success",type="healthz"} 15
kubernetes_healthchecks_total{name="etcd",status="success",type="readyz"} 15
kubernetes_healthchecks_total{name="etcd-readiness",status="success",type="readyz"} 15
kubernetes_healthchecks_total{name="informer-sync",status="error",type="readyz"} 1
kubernetes_healthchecks_total{name="informer-sync",status="success",type="readyz"} 14
kubernetes_healthchecks_total{name="log",status="success",type="healthz"} 15
kubernetes_healthchecks_total{name="log",status="success",type="readyz"} 15
kubernetes_healthchecks_total{name="ping",status="success",type="healthz"} 15
kubernetes_healthchecks_total{name="ping",status="success",type="readyz"} 15
使用此类数据
组件 SLI 指标端点旨在以高频率被抓取。
高频率抓取意味着你最终会获得更细粒度的计量信号，然后可以将其用于计算 SLO。
/metrics/slis 端点为各个 Kubernetes 组件提供了计算可用性 SLO 所需的原始数据。
最后修改 May 28, 2023 at 11:41 AM PST: sync slis.md and deployment.md (820f9adf6e)