https://prometheus.io/docs/prometheus/latest/configuration/configuration/

# List of HTTP service discovery configurations.
http_sd_configs:


HTTP-based service discovery provides a more generic way to configure static targets and serves as an interface to plug in custom service discovery mechanisms.

It fetches targets from an HTTP endpoint containing a list of zero or more static_config . 
The target must reply with an HTTP 200 response. 
The HTTP header Content-Type must be application/json, and the body must be valid JSON.

Example response body:

[
  {
    "targets": [ "host", ... ],
    "labels": {
      "labelname": "labelvalue", ...
    }
  },
  ...
]
The endpoint is queried periodically at the specified refresh interval. 
The prometheus_sd_http_failures_total counter metric tracks the number of refresh failures.

Each target has a meta label __meta_url during the relabeling phase. 
Its value is set to the URL from which the target was extracted.




static_configs


  - job_name: 'app1'

    # metrics_path defaults to '/metrics'
    # scheme defaults to 'http'.
    static_configs:
    - targets: ['192.168.0.8:8000','192.168.0.8:8010']

  - job_name: 'app2'
    metrics_path:'/my/metrics'
    static_configs:
    - targets: ['127.0.0.1:8080','127.0.0.1:8090']




scrape_configs:
  - job_name: 'http-sd-demo'
    http_sd_configs:
     - url: http://127.0.0.1:8080/api/services 
    



[
    {
        "targets": ["10.0.10.2:9100", "10.0.10.3:9100", "10.0.10.4:9100", "10.0.10.5:9100"],
        "labels": {
            "__meta_datacenter": "london",
            "__meta_prometheus_job": "node"
        }
    },
    {
        "targets": ["10.0.40.2:9200", "10.0.40.3:9200"],
        "labels": {
            "__meta_datacenter": "london",
            "__meta_prometheus_job": "alertmanager"
        }
    },
    {
        "targets": ["10.0.40.2:9093", "10.0.40.3:9093"],
        "labels": {
            "__meta_datacenter": "newyork",
            "__meta_prometheus_job": "alertmanager"
        }
    }
]




./prometheus --version
prometheus, version 2.17.1 (branch: HEAD, revision: ae041f97cfc6f43494bed65ec4ea4e3a0cf2ac69)

./promtool check config prometheus.yml
Checking prometheus.yml
  FAILED: parsing YAML file prometheus.yml: yaml: unmarshal errors:
  line 92: field http_sd_configs not found in type config.plain
  

  



使用nacos的服务发现功能，自动获取实例配置监控，将某服务的实例列表写入文件。
https://gitee.com/lhtzbj12/prometheus-sd-nacos