Python scripts remotely execute commands in batches

Python scripts remotely execute commands in batches
Abstract: This article mainly writes a python script to remotely connect to multiple servers, then executes commands in batches, and finally returns the command execution result. This is the simplest prototype of Ansible, Puppet, and other tools. Everyone who is doing O & M should know about it. Body multi_task.py

#_*_coding:utf-8_*_import  multiprocessingimport paramikoimport getpassimport ConfigParserclass MultiTask(object):    '''handles all the multi task works'''    def __init__(self):        msg = self._interactive()        self.__run_cmd(msg)    def __show_cmd_list(self,msg):        '''show all available cmd list'''        help_content = '''        run_cmd     run cmd on multiple hosts                    run_cmd -u remote_user -g group1,group2 -cmd pwd                    run_cmd -u remote_user -re regular expression -cmd pwd

 

'''Def _ interactive (self ):

    msg = []        nodes = []        #parse setting.conf        Config = ConfigParser.ConfigParser()        Config.read("./setting.conf")        groups = Config.sections()        print groups        # Input group name        while True:            try:                group = raw_input("\033[33;1mPlease Input Group Name:\033[0m").strip()                if len(group) == 0 : continue                elif group not in groups:                    print "Wrong group name ! Please input again!"                    continue                else :

 

  print "You have choose group %s , the children in this group are :" % group                    break                         except (KeyboardInterrupt):                print '\n'                exit(1)                 items = dict(Config.items(group))        for node in items.values():            nodes.append(node)            print node                 # Input command        while True:            try:                cmd = raw_input("\033[33;1mPlease Input Command:\033[0m").strip()                if len(cmd) == 0 : continue                else: break            except (KeyboardInterrupt):                print '\n'                exit(1)        print "Command you input is %s" % cmd

 

      # Input username and password        while True:            try:                username = raw_input("\033[33;1mPlease Input username:\033[0m").strip()                if len(username) == 0 : continue                else: break            except (KeyboardInterrupt):                print '\n'                exit(1)        password = getpass.getpass()                msg = [nodes,username,password,cmd]        print msg        return msg    def __run_cmd(self,msg):        pool = multiprocessing.Pool(5)        lock = multiprocessing.Manager().Lock()        res_list = []        #msg = [['10.9.214.10','haohzhang','871102_Hadoop'],['10.9.214.105','haohzhang','

 

871102_Hadoop '], ['10. 9.214.106 ', 'haohzhang', '000000_hadoop '] for host in msg [0]: p = pool. apply_async (run_task, args = (host, msg [1:], lock) res_list.append (p) pool. close () pool. join () print '-------- All tasks are finished! ------- 'Def run_task (host, msg, lock): ip = host username = msg [0] password = msg [1] cmd = msg [2] print "ip % s, username % s, passwd % s, cmd % s "% (ip, username, password, cmd) port = 22 s = paramiko. SSHClient () # bind instance s. load_system_host_keys () # load the local know host file s. set_missing_host_key_policy (paramiko. autoAddPolicy () try:

 

S. connect (ip, port

, Username, password, timeout = 5) # connect to the remote host stdin, stdout, stderr = s.exe c_command (cmd) # Run the command cmd_result = stdout. read (), stderr. read () # read the command result lock. acquire () print '----------- HOST: % s IP: % s -------------' % (username, ip) for line in each _result: print line, lock. release () s. close () failed t Exception, e: print '----------- HOST: % s IP: % s -------------' % (username, ip) print '\ 033 [31; 1 mError: % s \ 033 [0m' % e # vim: ts = 4: sw = 4: expandtab

 

Setting. conf

[datanodes]node1=10.9.214.10node2=10.9.214.105node3=10.9.214.106node4=10.9.214.113[masternodes]masternode=10.9.214.15

 

Main. py

from multi_task import MultiTask, run_tasktasks = MultiTask()

 

Running Method: python main. py explanation: