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1. 安装Prometheus

Prometheus一个系统和服务监控系统。它以给定的时间间隔从配置的目标收集指标，计算规则表达式，显示结果，并在观察到某些条件为真时触发警报。

可观察性侧重于根据系统产生的数据了解系统的内部状态，这有助于确定基础设施是否健康。Prometheus是用于监视和观察系统的核心技术

与其它监控系统相比，特点如下：

• a multi-dimensional data model (timeseries defined by metric name and set of key/value dimensions)
• a flexible query language to leverage this dimensionality
• no dependency on distributed storage; single server nodes are autonomous
• timeseries collection happens via a pull model over HTTP
• pushing timeseries is supported via an intermediary gateway
• targets are discovered via service discovery or static configuration
• multiple modes of graphing and dashboarding support
• support for hierarchical and horizontal federatio