python之multiprocessing(二)：multiprocessing.Pool

[实现:多进程paramiko]

1.server_list.txt   :格式   HOST  PORT   USER   PASSWD

localhost 22 root root
193.168.49.144 22 root root

2.get_server_list.py

server_list_file = "server_list.txt"
def get_serverlist_dic():
        server_dic = {}
        f = file(server_list_file)
        for line in f.readlines():
                if len(line.strip()) == 0:break
                server_dic[line.split()[0]] = line.split()[1:]
        f.close()
        return server_dic
server_dic = get_serverlist_dic()
#print server_dic

3.single_paramiko.py

#!/usr/bin/env python
#encoding:utf8
import paramiko
import sys,os,time

host = sys.argv[1]
port = int(sys.argv[2])
user = sys.argv[3]
password = sys.argv[4]
cmd = str(sys.argv[5])

msg = "---------Result:%s----------" %host


p_client = paramiko.SSHClient() #绑定实例
p_client.load_system_host_keys() #加载本机HOST主机文件
p_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())

try:
        p_client.connect(host,port,user,password,timeout=5)
        stdin,stderr,stdout = p_client.exec_command(cmd)

        cmd_result = stdout.read(),stderr.read()
        print msg

        for line in cmd_result:
                print line,

except paramiko.AuthenticationException,e:
        print msg
        print "message:" + str(e)
        sys.exit()
except paramiko.BadHostKeyException,e:
        print msg
        print "Bad host key" + str(e)

        p_client.close()

4.multi_async.py

import multiprocessing
import os,sys,time
import get_server_list

cmd = sys.argv[1]
result = []

def runCmd(h,port,user,passwd,command):

        cmd = "python single_paramiko.py %s %s %s %s %s" %(h,port,user,passwd,command)
        print cmd
        os.system(cmd)
p = multiprocessing.Pool(processes=250)

server_dic = get_server_list.server_dic

for host,values in server_dic.items():
        ssh_port = values[0]
        username = values[1]
        password = values[2]
        result.append(p.apply_async(runCmd,(host,ssh_port,username,password,cmd,)))

for res in result:
        res.get(timeout=35)

5.实际运行

[root@centos6 multiprocess]# python multi_async.py ls
python single_paramiko.py 193.168.49.144 22 root root ls
python single_paramiko.py localhost 22 root root ls
---------Result:localhost----------
 aaa.a
anaconda-ks.cfg
Desktop
Documents
Downloads
install.log
install.log.syslog
.....

.....
---------Result:193.168.49.144----------
 anaconda-ks.cfg
Desktop
Documents
Downloads
install.log
install.log.syslog
.....

.....