一、获取服务名
- 登陆 consul UI 平台, 找到我们对应的服务，他们服务在 consul 中的名称。
二、 脚本
注销基于的api：
http://{}:{}/v1/agent/service/deregister/{}
注销脚本：
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# @Time : 2021/3/29 10:26
# @Author : dongjiaxiao
# @Email :
# @File : consul_deregister.py
# @Desc :
import requests
import json
import logging
import sys
def http_request(url, methods):
if methods == 'get':
try:
responce = requests.get(url=url, timeout=5)
res_data = responce.json()
except Exception as e:
logging.error(e)
elif methods == 'put':
try:
responce = requests.put(url=url, timeout=5)
res_data = responce.status_code
except Exception as e:
logging.error(e)
return res_data
def get_node_ip(nodeName):
"""
获取nodeName 对应的IP
:param nodeName:
:return:
"""
node_url = "http://{}:{}/v1/catalog/node/{}".format(consul_host, consul_port, nodeName)
node_data = http_request(node_url, 'get')
node_ip = node_data["Node"].get('Address', '')
return node_ip
def check_service(service_name):
"""
检查服务
:return:
"""
res = {'critical':[], 'passing': []}
chek_url = 'http://{}:{}/v1/health/checks/{}'.format(consul_host, consul_port, service_name)
check_data = http_request(chek_url, 'get')
if check_data:
for i in check_data:
if i['Status'] == 'critical':
node_ip = get_node_ip(i['Node'])
res['critical'].append({'serviceID': i['ServiceID'], 'node': i['Node'], 'ip': node_ip})
elif i['Status'] == 'passing':
node_ip = get_node_ip(i['Node'])
res['passing'].append({'serviceID': i['ServiceID'], 'node': i['Node'], 'ip': node_ip})
return res
else:
logging.error("未找到服务 {}".format(service_name))
return "未找到服务 {}".format(service_name)
def check_node_service(service_name, hostIp):
"""
基于 服务名和 主机ip 进行查找节点信息
:param service_name:
:return:
"""
res = []
chek_url = 'http://{}:{}/v1/health/checks/{}'.format(consul_host, consul_port, service_name)
check_data = http_request(chek_url, 'get')
if check_data:
for i in check_data:
node_ip = get_node_ip(i['Node'])
if node_ip == hostIp:
res.append({'serviceID': i['ServiceID'], 'node': i['Node'], 'ip': hostIp})
return res
def deregister_operation(nodeIp, serviceId):
"""
注销服务
:param nodeIp:
:param serviceId:
:return:
"""
deregister_url = 'http://{}:{}/v1/agent/service/deregister/{}'.format(nodeIp, consul_port, serviceId)
res = http_request(deregister_url, 'put')
logging.info("注销节点url: {} res: {}".format(deregister_url, res))
return res
def deregister_service(service_name):
res = check_service(service_name)
if isinstance(res, dict):
critical_service = res.get('critical')
if critical_service:
data = {"异常节点": [], '已经注销节点': []}
for service_data in critical_service:
serviceId = service_data.get('serviceID')
nodeIp = service_data.get('ip')
data['异常节点'].append(serviceId)
if serviceId and nodeIp:
res_code = deregister_operation(nodeIp, serviceId)
if res_code == 200:
data['已经注销节点'].append(serviceId)
else:
logging.error("serviceId {} and nodeIp {} 缺少参数".format(serviceId, nodeIp))
return data
else:
return "未找到异常节点"
return res
def deregister_service_host(service_name, hostIp):
"""
基于 服务名和 主机ip 进行注销对应主机上的节点信息
:param service_name:
:return:
"""
res = check_node_service(service_name, hostIp)
if res:
data = {"需要注销节点": [], '已经注销节点': []}
for service_data in res:
serviceId = service_data.get('serviceID')
nodeIp = service_data.get('ip')
data['需要注销节点'].append(serviceId)
if serviceId and nodeIp:
res_code = deregister_operation(nodeIp, serviceId)
if res_code == 200:
data['已经注销节点'].append(serviceId)
logging.info("serviceId {} and nodeIp {}, res: {} ".format(serviceId, nodeIp, res))
else:
logging.error("serviceId {} and nodeIp {} 缺少参数".format(serviceId, nodeIp))
return data
return '在主机未找到该服务'
if __name__ == '__main__':
consul_host = '10.60.6.37'
consul_port = '8500'
file_handler = logging.FileHandler(filename='./consul_deregister.log', encoding='utf-8')
logging.basicConfig(format="%(asctime)s %(name)s:%(levelname)s:%(message)s", datefmt='%Y-%m-%d %H:%M:%S',
level=logging.INFO, handlers={file_handler})
if len(sys.argv) == 3 and sys.argv[1] == "check": # 获取异常节点
service_name = sys.argv[2]
data = check_service(service_name)
if isinstance(data, dict):
print("异常节点信息: {}".format(data.get('critical')))
print("正常节点信息: {}".format(data.get('passing')))
else:
print(data)
elif len(sys.argv) == 3 and sys.argv[1] == "deregister": # 注销异常节点, 指定服务名
service_name = sys.argv[2]
print(deregister_service(service_name))
elif len(sys.argv) == 4 and sys.argv[1] == "deregister": # 注销异常节点, 指定服务名和ip
service_name = sys.argv[2]
hostIp = sys.argv[3]
print(deregister_service_host(service_name, hostIp))
elif len(sys.argv) == 4 and sys.argv[1] == "deregister_serviceid": # 注销异常节点, 指定nodeip(注册的consul client ip) 和 service_id
hostIp = sys.argv[3]
service_id = sys.argv[2]
print(deregister_operation(hostIp, service_id))
else:
print("please use parameter check|deregister service_name")
三、基本功能操作
-
获取某个服务当前状态。
python3 consul_tools.py check cmdb-front-dp-test响应：
[root@djx scripts]# python3 consul_tools.py check cmdb-front-dp-test 异常节点信息: [] 正常节点信息: [{'serviceID': 'docker-57-58.baidu.com:cmdb-front-dp_0_22fecc7-190308.170959:80', 'node': 'docker-57-58.baidu.com', 'ip': '192.168.57.58'}] -
注销服务当前异常节点
会拿上面异常节点的信息，然后进行注销服务
python3 consul_tools.py deregister cmdb-front-dp-test响应：
-
未找到节点
-
{'异常节点': ['docker-110-89.baidu.com:user-server-sit-skywalking_0_v2.1:8080'], '已经注销节点': ['docker-110-89.baidu.com:user-server-sit-skywalking_0_v2.1:8080']}
-
-
下线指定机器 ip 上的指定服务
适用场景：
- 某机器上的某个节点忽好忽坏，我们获取机器ip 和 服务名后，不管该服务是否健康检查通过，都将其下线。
不管该机器上的对应服务节点是正常，还是异常都会进行下线。
python3 consul_tools.py deregister cmdb-front-dp-test 10.57.57.58响应：
-
如果在主机上未找到
在主机未找到该服务 -
下线
{'需要注销节点': ['docker-10-58.baidu.com:cmdb-front-dp_0_22fecc7-190308.170959:80'], '已经注销节点': ['docker-10-58.baidu.com:cmdb-front-dp_0_22fecc7-190308.170959:80']}
-
已经知道要下线的服务的 ID ，形如，
docker-10-58.baidu.com:cmdb-front-dp_0_22fecc7-190308.170959:80和 知道该服务注册的consul ippython3 consul_tools.py deregister_serviceid 192.168.57.58 docker-10-58.baidu.com:cmdb-front-dp_0_22fecc7-190308.170959:80