prometheus 配置项注意事项

1.job:metrics_path

如果是静态模式下配置job（statics），直接配置job的metrics_path选项是不生效的。需要同时在exporter端指定metrics_path。如图

prometheus server端配置：

exporter端启动命令（假设是node-exporter）：

/node_exporter --web.telemetry-path=/danny

这里的“--web.telemetry-path=/danny”就是指定path是"/danny"，而非默认的“/metrics”；

2.global：external_labels

配置项external_labels是用于外部系统标签的，不是用于metrics数据

3.job：honor_labels

honor_labels主要用于解决prometheus server的label与exporter端用户自定义label冲突的问题。

官方说明：

#If honor_labels is set to "true", label conflicts are resolved by keeping label
# values from the scraped data and ignoring the conflicting server-side labels.
#
# If honor_labels is set to "false", label conflicts are resolved by renaming
# conflicting labels in the scraped data to "exported_<original-label>" (for
# example "exported_instance", "exported_job") and then attaching server-side
# labels. This is useful for use cases such as federation, where all labels
# specified in the target should be preserved.