Prometheus - Relabel

2022-02-01 05:13:49

通过对标签的重命名进行重整操作，便于统一化管理或者服务升级前后管理。

原始数据：

cat targets/node-exporter.yml

- targets:
  - "172.20.31.195:9100"
  labels:
    __os__: "linux"
    __release__: "redhat"
- targets:
  - "172.20.31.196:9100"
  labels:
    __os__: "linux"
    __release__: "centos"
- targets:
  - "172.20.31.197:9100"
  labels:
    __os__: "linux"
    __release__: "centos"

Prometheus - Relabel

replace: 对原有的标签进行更名

scrape_configs:
  - job_name: 'node-exporter'
    file_sd_configs:
    - files:
      - targets/node-exporter.yml
      refresh_interval: 1m
    relabel_configs:
    - source_labels:
      - "__os__"
      regex: "(.*)"
      target_label: "os"
      action: replace
      replacement: "$1"

replace-separator: 对字段进行合并处理

scrape_configs:
  - job_name: 'node-exporter'
    file_sd_configs:
    - files:
      - targets/node-exporter.yml
      refresh_interval: 1m
    relabel_configs:
    - source_labels:
      - "__os__"
      - "__release__"
      separator: "-"
      regex: "(.*)"
      target_label: "os_release"
      action: replace
      replacement: "$1"

keep: 满足特定条件的实例进行采集，其他的不采集。

scrape_configs:
  - job_name: 'node-exporter'
    file_sd_configs:
    - files:
      - targets/node-exporter.yml
      refresh_interval: 1m
    relabel_configs:
    - source_labels:
      - "__release__"
      regex: "redhat"
      action: keep

drop：满足特定条件的实例不采集，其他的采集。

scrape_configs:
  - job_name: 'node-exporter'
    file_sd_configs:
    - files:
      - targets/node-exporter.yml
      refresh_interval: 1m
    relabel_configs:
    - source_labels:
      - "__release__"
      regex: "redhat"
      action: drop

labelkeep：对抓取的实例特定标签进行保留，其他标签删除。

scrape_configs:
  - job_name: 'node-exporter'
    file_sd_configs:
    - files:
      - targets/node-exporter.yml
      refresh_interval: 1m
    relabel_configs: 
    - source_labels:
      - "__os__"
      regex: "(.*)"
      target_label: "os"
      action: replace
      replacement: "$1"
    - source_labels:
      - "__release__"
      regex: "(.*)"
      target_label: "release"
      action: replace
      replacement: "$1"
    - regex: "jobs"
      action: labelkeep

labeldrop：对抓取的实例特定标签进行删除。

scrape_configs:
  - job_name: 'node-exporter'
    file_sd_configs:
    - files:
      - targets/node-exporter.yml
      refresh_interval: 1m
    relabel_configs: 
    - source_labels:
      - "__os__"
      regex: "(.*)"
      target_label: "os"
      action: replace
      replacement: "$1"
    - source_labels:
      - "__release__"
      regex: "(.*)"
      target_label: "release"
      action: replace
      replacement: "$1"
    - regex: "os"
      action: labeldrop

hashmod：将target_label设置成source_label的modulus配置的hash值；

labelmap：将regex匹配到的所有标签的名称配置成新的标签，值配置成新标签的值；

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