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Update scale-prometheus-with-federation.md
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riverbuilding committed Oct 8, 2019
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如上图所示,在每个数据中心部署单独的Prometheus Server,用于采集当前数据中心监控数据。并由一个中心的Prometheus Server负责聚合多个数据中心的监控数据。这一特性在Promthues中称为联邦集群。

联邦集群的核心在于每一个Prometheus Server都包含额一个用于获取当前实例中监控样本的接口/federate。对于中心Prometheus Server而言,无论是从其他的Prometheus实例还是Exporter实例中获取数据实际上并没有任何差异。
联邦集群的核心在于每一个Prometheus Server都包含一个用于获取当前实例中监控样本的接口/federate。对于中心Prometheus Server而言,无论是从其他的Prometheus实例还是Exporter实例中获取数据实际上并没有任何差异。

```
scrape_configs:
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