python实现nacos服务注册和HTTP探活

如果使用nacos-sdk-python（注意适用nacos版本），需要按照下面的链接修改源码的bug

https://github.com/nacos-group/nacos-sdk-python/issues/135

代码如下：

import nacos
import threading
import socket
import requests
import json
from flask import Flask

app = Flask(__name__)

class NacosReg:
    def __init__(self):
        self.SERVER_HOST = "127.0.0.1"
        self.SERVER_PORT = 8848
        self.SERVER_ADDRESSES = f"http://{self.SERVER_HOST}:{self.SERVER_PORT}"
        self.SERVICE_NAME = "test_server"
        self.GROUP_NAME = "DEFAULT_GROUP"
        self.username = "nacos"
        self.password = "nacos"
        self.client = nacos.NacosClient(self.SERVER_ADDRESSES, username=self.username, password=self.password)
        self.model_port = 8000

    def get_host_ip(self):
        try:
            s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
            s.connect((self.SERVER_HOST, self.SERVER_PORT))
            ip = s.getsockname()[0]
        finally:
            s.close()
        return ip

    def service_register_and_check(self):
        self.service_register_()
        self.set_http_check()

    def service_register(self):
        self.client.add_naming_instance(self.SERVICE_NAME,
                                        self.get_host_ip(),
                                        self.model_port, ephemeral=False, group_name=self.GROUP_NAME)

    def service_register_(self):
        params = {
            "ip": self.get_host_ip(),
            "port": self.model_port,
            "serviceName": self.SERVICE_NAME,
            "weight": 1.0,
            "enable": True,
            "healthy": True,
            "clusterName": "None",
            "ephemeral": False,
            "groupName": self.GROUP_NAME,
            'username': self.username,
            'password': self.password
        }
        res = requests.post(f"{self.SERVER_ADDRESSES}/nacos/v1/ns/instance", params=params)
        print(res.text)

    def service_unregister(self):
        self.client.remove_naming_instance(self.SERVICE_NAME,
                                           self.get_host_ip(),
                                           self.model_port, ephemeral=False, group_name=self.GROUP_NAME)

    def set_http_check(self):
        data = {
            "serviceName": f"{self.GROUP_NAME}@@{self.SERVICE_NAME}",
            "clusterName": "None",
            "checkPort": 80,
            "useInstancePort4Check": True,
            "healthChecker": json.dumps({"type": "HTTP", "path": "/test"}),
            "namespaceId": ""
        }
        res = requests.put(f"{self.SERVER_ADDRESSES}/nacos/v1/ns/cluster",
                           params={'username': self.username, 'password': self.password}, data=data)
        print(res.text)

    def service_list(self):
        return self.client.list_naming_instance(self.SERVICE_NAME, healthy_only=True)

@app.route("/test", methods=['GET'])
def test():
    return "ok"

if __name__ == '__main__':
    threading.Timer(1, NacosReg().service_register_and_check).start()
    app.run(port=8000)

服务器运行情况：