初步理解多线程的好处
这两个例子告诉我们同样的事情，一个用了8s一个用了5s这就是多线程并发执行的好处。
paramiko 和 threading 多线程远程执行的基本案例 --[root@scsv01181 pythontest]# cat paramiko-threading.py #!/usr/bin/python #coding:utf-8 #from settings.py import * import paramiko import threading import time def tunction(ip,username,password,command): client = paramiko.SSHClient() client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) client.connect(ip,username= username,password=password) stdin,stdout,stdeer = client.exec_command(command) print stdout.read() client.close() def main(host_list,command): thread_list = [] for ip,username,password in host_list: t = threading.Thread(target = tunction,args = (ip,username,password,command)) thread_list.append(t) for th in thread_list: th.start() for th in thread_list: th.join()
if name == "main":
host_list = [
("10.133.107.8","gluster_zabbix","gluster"),
("10.133.107.9","gluster_zabbix","gluster"),
]
command = "ls /tmp/"
main(host_list,command)
==============================
优化：当我们的机器很多而且需要经常修改我们可以单独做一个配置文件
创建一个settings.py的配置文件
目录结构
--[root@scsv01181 pythontest]# cat settings.py
#!/usr/bin/python
#coding:utf-8
host_list = [ ("10.13.17.8","glustqeqr_zabbix","gluqwester"), ("10.13.17.9","glustewrer_zabbix","glursdaster"),
] command = "ls /var/"
代码 --[root@scsv01181 pythontest]# cat paramiko-threading.py #!/usr/bin/python #coding:utf-8 from settings import * import paramiko import threading import time def tunction(ip,username,password,command): client = paramiko.SSHClient() client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) client.connect(ip,username= username,password=password) stdin,stdout,stdeer = client.exec_command(command) print stdout.read() client.close() def main(host_list,command): thread_list = [] for ip,username,password in host_list: t = threading.Thread(target = tunction,args = (ip,username,password,command)) thread_list.append(t) for th in thread_list: th.start() for th in thread_list: th.join()
if name == "main":
main(host_list,command)
================================ 还可以设置守护线程
--[root@scsv01181 pythontest]# cat paramiko-threading.py #!/usr/bin/python #coding:utf-8 from settings import * import paramiko import threading import time def tunction(ip,username,password,command): client = paramiko.SSHClient() client.set_missing_host_key_policy(paramiko.AutoAddPolicy()) client.connect(ip,username= username,password=password) stdin,stdout,stdeer = client.exec_command(command) print stdout.read() client.close() def main(host_list,command): thread_list = [] for ip,username,password in host_list: t = threading.Thread(target = tunction,args = (ip,username,password,command)) thread_list.append(t) for th in thread_list: th.start() for th in thread_list: th.join()
if name == "main": start_time = time.time() m = threading.Thread(target = main,args = (host_list,command)) m.setDaemon(True) m.start() m.join() end_time = time.time() chg_time = str(start_time - end_time) + "s" print chg_time
