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我在使用consul的时候主要用于prometheus的consul服务发现，把数据库、虚拟机信息发布到consul，prometheus通过consul拿到数据库、虚拟机信息去采集指标信息。

此篇文章前提是已经安装好consul服务以后，安装consul请参考二进制方式部署consul单机版进行安装。

1.consul模板

文件名：consul-register.json.template

{"ID": "{{ exporter_id }}","Name": "{{ exporter_id }}","Tags": [{% for tag in tags %}"{{ tag }}"{% if not loop.last %},{% endif %}{% endfor %}],"Address": "{{ exporter_address }}","Port": {{ exporter_port }},"Meta": {{% for key, value in labels.items() %}"{{ key }}":"{{ value }}"{% if not loop.last %},{% endif %}{% endfor %}},"EnableTagOverride": false,"Weights": {"Passing": 10,"Warning": 1}
}

2.consul服务注册

import json
import osimport requests
from jinja2 import Environment, FileSystemLoaderclass Config:PROJECT_DIR = os.path.dirname(os.path.abspath(__file__))# 配置文件地址，根据自身存放路径修改CONSUL_TEMPLATE_DIR = os.path.join(PROJECT_DIR, 'common/consul')jinja_env = Environment(loader=FileSystemLoader(Config.CONSUL_TEMPLATE_DIR))
consul_register_template = jinja_env.get_template('consul-register.json.template')def register_vhost_exporter_to_consul() -> None:print(f"register node exporter to consul.")host = "192.168.56.108"exporter_id = f'node-exporter-192.168.56.108'params = consul_register_template \.render(exporter_id=exporter_id,tags=['vhost', 'node', 'exporter', 'node-exporter'],exporter_address=host,exporter_port=49150,labels={"host": host,"bk_inst_id": 1,"vh_oper_staff": 'test'})print(f"Start register svc: {exporter_id}")# http://192.168.56.108:8500为consul服务器地址resp = requests.put(f"http://192.168.56.108:8500/v1/agent/service/register",json=json.loads(params),verify=False)if not resp.ok:raise Exception(f"register svc {exporter_id} failed.")print(f"register svc {exporter_id} Success.")if __name__ == '__main__':register_vhost_exporter_to_consul()

执行注册后，效果如下图

3.consul服务注销

import requestsdef unregister_vhost_exporter_from_consul():exporter_id = f'node-exporter-192.168.56.108'resp = requests.put(f"http://192.168.56.108:8500/v1/agent/service/deregister/{exporter_id}",verify=False)if not resp.ok and resp.status_code != 404:# 404说明已经取消注册过了raise Exception(f"unregister svc {exporter_id} failed.")if __name__ == '__main__':unregister_vhost_exporter_from_consul()

注销后效果如下图