Prometheus配置详解

prometheus配置文件说明 ，官网地址： https://prometheus.io/docs/prometheus/latest/configuration/configuration/#scrape_config

全局整体分为六个部分，具体配置如下：

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 remote write feature.
remote_write:
  [ - <remote_write> ... ]

# Settings related to the remote read feature.
remote_read:
  [ - <remote_read> ... ]

1、global, 全局配置

scrape_interval： 从targets获取数据的间隔，这里配置的是默认值。
scrape_timeout: 获取数据的超时时间
evaluation_interval: alert告警规则以及record规则的计算周期, 计算是否到达阈值。
external_labels: 发送给外部系统，添加的标签。比如: 发送给alertmanager的报警信息中包含，alertmanager发出来的报警也就包含这个标签。

2、rule_files, 指定报警规则的文件

rule_files:
   - "rules/test.yml"

 

3、scrape_configs, 指定监控目标targets的配置。

scrape_configs:
  [ - <scrape_config> ... ]

3.1 static_configs

job_name：名称

targets:目标，可以填写多个，隔开

 - job_name: 'mariadb-01'
    static_configs:
    - targets: ['172.100.102.100:9104']
      labels:
        alias: mariadb-01

  - job_name: 'mariadb-02'
    static_configs:
    - targets: ['172.100.102.102:9104']
      labels:
        alias: mariadb-02

3.2 eureka_sd_configs

从eureka等服务注册服务读取地址：

eureka_sd_configs:
  - server: http://10.126.126.77:19136/eureka
    refresh_interval: 30s

3.3 file_sd_configs

从file动态读取地址：

file_sd_configs:
  - files:
    - /opt/soft/prometheus/prometheus-2.12.0.linux-amd64/sd/huntermanualcheck.json
    refresh_interval: 1m

3.4 relabel_configs

重写label，可以根据规则进行动态的修改label的各个属性。

target_label:修改的目的label

source_labels:源label

regex:正则表达式

replacement：替换结果

action：动作为replace，默认为replace

separator:多个source_labels之间的分隔符

 

3.4.1.修改端口

relabel_configs:
    - source_labels: [ __address__ ]
      target_label: __address__
      regex: (.*):10250
      replacement: $1:9101
      action: replace

__address__:为target的host:port的部分

$1为regex中正则匹配到的部分

3.4.2.修改地址以及添加标签

    relabel_configs:
    - source_labels: [__address__]
      target_label: __address__
      regex: (.*)
      replacement: 127.0.0.1:9090
      action: replace
    - source_labels: [__address__, __metrics_path__]
      target_label: test
      separator: '-'
      regex: (.*)
      replacement: $1
      action: replace

3.4.3.只保留符合的target

  relabel_configs:
    - source_labels: [__meta_kubernetes_pod_container_name,__meta_kubernetes_pod_container_port_number]
      separator: ;
      regex: coredns;9153
      action: keep

3.4.4.删除target

 relabel_configs:
    - regex: ^.*(annotation|label|uid|job).*$
      action: labeldrop

 

4、alerting

Alertmanager相关配置

5、remote_write

指定url，写入远程服务器。

6、remote_read

指定url, 从远程服务器读。