配置

Prometheus 启动的时候，可以加载运行参数 -config.file 指定配置文件，默认为 prometheus.yml。

在配置文件中我们可以指定 global, alerting, rule_files, scrape_configs, remote_write, remote_read 等属性。

其代码结构体定义为：

  1. // Config is the top-level configuration for Prometheus's config files.
  2. type Config struct {
  3.     GlobalConfig   GlobalConfig    `yaml:"global"`
  4.     AlertingConfig AlertingConfig  `yaml:"alerting,omitempty"`
  5.     RuleFiles      []string        `yaml:"rule_files,omitempty"`
  6.     ScrapeConfigs  []*ScrapeConfig `yaml:"scrape_configs,omitempty"`
  8.     RemoteWriteConfigs []*RemoteWriteConfig `yaml:"remote_write,omitempty"`
  9.     RemoteReadConfigs  []*RemoteReadConfig  `yaml:"remote_read,omitempty"`
  11.     // Catches all undefined fields and must be empty after parsing.
  12.     XXX map[string]interface{} `yaml:",inline"`
  14.     // original is the input from which the config was parsed.
  15.     original string
  16. }

配置文件结构大概为：

  1. global:
  2.   # How frequently to scrape targets by default.
  3.   [ scrape_interval: <duration> | default = 1m ]
  5.   # How long until a scrape request times out.
  6.   [ scrape_timeout: <duration> | default = 10s ]
  8.   # How frequently to evaluate rules.
  9.   [ evaluation_interval: <duration> | default = 1m ]
  11.   # The labels to add to any time series or alerts when communicating with
  12.   # external systems (federation, remote storage, Alertmanager).
  13.   external_labels:
  14.     [ <labelname>: <labelvalue> ... ]
  16. # Rule files specifies a list of globs. Rules and alerts are read from
  17. # all matching files.
  18. rule_files:
  19.   [ - <filepath_glob> ... ]
  21. # A list of scrape configurations.
  22. scrape_configs:
  23.   [ - <scrape_config> ... ]
  25. # Alerting specifies settings related to the Alertmanager.
  26. alerting:
  27.   alert_relabel_configs:
  28.     [ - <relabel_config> ... ]
  29.   alertmanagers:
  30.     [ - <alertmanager_config> ... ]
  32. # Settings related to the experimental remote write feature.
  33. remote_write:
  34.   [ - <remote_write> ... ]
  36. # Settings related to the experimental remote read feature.
  37. remote_read:
  38.   [ - <remote_read> ... ]