# 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： ``` // Config is the top-level configuration for Prometheus's config files. type Config struct { GlobalConfig GlobalConfig `yaml:"global"` AlertingConfig AlertingConfig `yaml:"alerting,omitempty"` RuleFiles []string `yaml:"rule_files,omitempty"` ScrapeConfigs []*ScrapeConfig `yaml:"scrape_configs,omitempty"` RemoteWriteConfigs []*RemoteWriteConfig `yaml:"remote_write,omitempty"` RemoteReadConfigs []*RemoteReadConfig `yaml:"remote_read,omitempty"` // Catches all undefined fields and must be empty after parsing. XXX map[string]interface{} `yaml:",inline"` // original is the input from which the config was parsed. original string } ``` 配置文件结构大概为： ``` global: # How frequently to scrape targets by default. [ scrape_interval: <duration> | default = 1m ] # How long until a scrape request times out. [ scrape_timeout: <duration> | default = 10s ] # How frequently to evaluate rules. [ evaluation_interval: <duration> | default = 1m ] # The labels to add to any time series or alerts when communicating with # external systems (federation, remote storage, Alertmanager). external_labels: [ <labelname>: <labelvalue> ... ] # Rule files specifies a list of globs. Rules and alerts are read from # all matching files. rule_files: [ - <filepath_glob> ... ] # A list of scrape configurations. scrape_configs: [ - <scrape_config> ... ] # Alerting specifies settings related to the Alertmanager. alerting: alert_relabel_configs: [ - <relabel_config> ... ] alertmanagers: [ - <alertmanager_config> ... ] # Settings related to the experimental remote write feature. remote_write: [ - <remote_write> ... ] # Settings related to the experimental remote read feature. remote_read: [ - <remote_read> ... ] ```