需求： 检查一个zookeeper服务中的某些节点是否存在，如果存在返回OK，不存在则给出不存的节点信息。要求返回的信息是和pyunit的结果信息一致。

实现环境：

1. python 2.7 以及自带的pyunit
2. bottle 作为一个python的简易服务器

pip install bottle

3. kazoo 一个python的zookeeper客户端

pip install kazoo

1. 创建一个python的测试类 zk_check.py

 -*- coding: utf-8 -*- 
 
 from kazoo.client import KazooClient 
 import unittest 
 class zktest(unittest.TestCase): 
 def runTest(self): 
 zknamespace = “/app/zktest_performance_1” 
 zkhosts = “127.0.0.1:2181,127.0.0.1:2182,127.0.0.1:2183” 
 ZKTEST_DRIVERS = [“ip1”, “ip2”] 
 ZKTEST_NODES = [“ip3”, “ip4”, “ip5”, “ip6”]
 
 driverChildren = [] 
 nodeChildren = [] 
 badDrivers = [] 
 badNodes = [] 
 # checking 
 zk = KazooClient(hosts=zkhosts, read_only=True) 
 zk.start() 
 driverFatherPath = zknamespace + “/status/drivers” 
 nodeFatherPath = zknamespace + “/status/nodes” 
 
 if zk.exists(driverFatherPath): 
 driverChildren = zk.get_children(driverFatherPath) 
 if len(driverChildren) > 
 
 for driver in zktest_DRIVERS: 
 if driver not in driverChildren: 
 badDrivers.append(driver) 
 
 if zk.exists(nodeFatherPath): 
 nodeChildren = zk.get_children(nodeFatherPath) 
 if len(nodeChildren) > 
 
 for node in zktest_NODES: 
 if node not in nodeChildren: 
 badNodes.append(node) 
 zk.stop()
 if (len(badNodes)==0) and (len(badDrivers)==0): 
 self.assertEquals(1,1,”pass”) 
 else: 
 if len(badDrivers) > 0: 
 self.assertEquals(1,2,'len : %d , error : %s' % (len(badDrivers),badDrivers))
 if len(badNodes) > 0: 
 self.assertEquals(1,2,'len : %d , error : %s' % (len(badNodes),badNodes)) 
 if __name__ == ‘__main__': 
 unittest.main()

2. 写一个bottle服务，将结果输出

 import commands 
 from bottle import route, run, template 
 @route(‘/alisa') 
 def index(): 
 command = “python /Users/metaboy/script/zk_check.py” 
 
 #output = os.popen(command) 
 return template(‘{{text}}', text=commands.getoutput(command)) 
 
 run(host='localhost', port=8888) 

3. 后台启动bottle服务，提供外部访问ip

现在可以直接通过 http://localhost:8888/alisa 进行访问。