What is the working principle of Prometheus?

Prometheus is an open-source monitoring system designed to collect real-time metric data. Its operation mainly involves the following steps:

  1. Data collection: Prometheus regularly collects various metrics data, such as CPU usage and memory consumption, through a central server called Prometheus Server.
  2. Data storage: Prometheus stores the collected metric data in a local time series database, allowing for analysis and queries of the data.
  3. Data retrieval: Users can query stored metric data using PromQL, the query language provided by Prometheus, to calculate metrics such as average and maximum values.
  4. Displaying Data: Prometheus also offers a graphical user interface for showcasing real-time metric data, allowing users to monitor the status of their system.

In general, the principle of operation for Prometheus involves regularly collecting, storing, querying, and displaying metric data to help users monitor the performance and operation of a system.

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