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105 lines
4.2 KiB
105 lines
4.2 KiB
#!/usr/bin/env python |
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# -*- coding:utf-8 -*- |
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''' |
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1, yum install pip |
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yum -y install python-pip |
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2, pip install kazoo |
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pip install kazoo |
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or |
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3, conda install kazoo |
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conda install -c conda-forge kazoo |
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run script and parameter description： |
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nohup python -u monitor_server.py /data1_1T/dolphinscheduler 192.168.xx.xx:2181,192.168.xx.xx:2181,192.168.xx.xx:2181 /dolphinscheduler/masters /dolphinscheduler/workers> monitor_server.log 2>&1 & |
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the parameters are as follows: |
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/data1_1T/dolphinscheduler : the value comes from the installPath in install.sh |
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192.168.xx.xx:2181,192.168.xx.xx:2181,192.168.xx.xx:2181 : the value comes from zkQuorum in install.sh |
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the value comes from zkWorkers in install.sh |
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/dolphinscheduler/masters : the value comes from zkMasters in install.sh |
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/dolphinscheduler/workers : the value comes from zkWorkers in install.sh |
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''' |
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import sys |
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import socket |
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import os |
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import sched |
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import time |
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from datetime import datetime |
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from kazoo.client import KazooClient |
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schedule = sched.scheduler(time.time, time.sleep) |
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class ZkClient: |
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def __init__(self): |
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# hosts configuration zk address cluster |
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self.zk = KazooClient(hosts=zookeepers) |
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self.zk.start() |
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# read configuration files and assemble them into a dictionary |
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def read_file(self,path): |
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with open(path, 'r') as f: |
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dict = {} |
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for line in f.readlines(): |
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arr = line.strip().split('=') |
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if (len(arr) == 2): |
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dict[arr[0]] = arr[1] |
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return dict |
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# get the ip address according to hostname |
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def get_ip_by_hostname(self,hostname): |
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return socket.gethostbyname(hostname) |
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# restart server |
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def restart_server(self,inc): |
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config_dict = self.read_file(install_path + '/conf/config/run_config.conf') |
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master_list = config_dict.get('masters').split(',') |
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print master_list |
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master_list = list(map(lambda item : self.get_ip_by_hostname(item),master_list)) |
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worker_list = config_dict.get('workers').split(',') |
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print worker_list |
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worker_list = list(map(lambda item: self.get_ip_by_hostname(item), worker_list)) |
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if (self.zk.exists(masters_zk_path)): |
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zk_master_list = [] |
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zk_master_nodes = self.zk.get_children(masters_zk_path) |
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for zk_master_node in zk_master_nodes: |
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zk_master_list.append(zk_master_node.split('_')[0]) |
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restart_master_list = list(set(master_list) - set(zk_master_list)) |
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if (len(restart_master_list) != 0): |
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for master in restart_master_list: |
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print("master " + self.get_ip_by_hostname(master) + " server has down") |
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os.system('ssh ' + self.get_ip_by_hostname(master) + ' sh ' + install_path + '/bin/dolphinscheduler-daemon.sh start master-server') |
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if (self.zk.exists(workers_zk_path)): |
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zk_worker_list = [] |
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zk_worker_nodes = self.zk.get_children(workers_zk_path) |
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for zk_worker_node in zk_worker_nodes: |
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zk_worker_list.append(zk_worker_node.split('_')[0]) |
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restart_worker_list = list(set(worker_list) - set(zk_worker_list)) |
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if (len(restart_worker_list) != 0): |
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for worker in restart_worker_list: |
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print("worker " + self.get_ip_by_hostname(worker) + " server has down") |
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os.system('ssh ' + self.get_ip_by_hostname(worker) + ' sh ' + install_path + '/bin/dolphinscheduler-daemon.sh start worker-server') |
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print(datetime.now().strftime("%Y-%m-%d %H:%M:%S")) |
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schedule.enter(inc, 0, self.restart_server, (inc,)) |
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# default parameter 60s |
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def main(self,inc=60): |
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# the enter four parameters are: interval event, priority (sequence for simultaneous execution of two events arriving at the same time), function triggered by the call， |
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# the argument to the trigger function (tuple form) |
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schedule.enter(0, 0, self.restart_server, (inc,)) |
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schedule.run() |
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if __name__ == '__main__': |
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if (len(sys.argv) < 4): |
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print('please input install_path,zookeepers,masters_zk_path and worker_zk_path') |
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install_path = sys.argv[1] |
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zookeepers = sys.argv[2] |
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masters_zk_path = sys.argv[3] |
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workers_zk_path = sys.argv[4] |
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zkClient = ZkClient() |
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zkClient.main(300) |