由于脚本执行时间，Paramiko 块中的命令

Question

hello guys i have three server and i mange it from SSH so i made this script to run my Register script "Register.py" so everyday i turn on Register mode so the problem how i can login to multiple SSH connection without close the other

import paramiko
import os
ZI1={"ip":"192.168.1.2","pass":"Administrator"}
ZI2={"ip":"192.168.1.3","pass":"AdminTeachers"}
ZI3={"ip":"192.168.1.4","pass":"AdminStudents"}
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
for F1 in ZI1:
    ssh.connect(ZI1["ip"],username='root', password=ZI1["pass"])
    ssh.exec_command('./register.py -time 6') #6 hour so the script still working for 6 hours
    ssh.close()
for F2 in ZI2:
    ssh.connect(ZI2["ip"],username='root', password=ZI2["pass"])
    ssh.exec_command('./register.py -time 6')
    ssh.close()
for F3 in ZI3:
    ssh.connect(ZI2["ip"],username='root', password=ZI2["pass"])
    ssh.exec_command('./register.py -time 6')
    ssh.close()

so what i have to do to open 3 sessions without stopping script !!

Answer 1

I'd suggest looking at Fabric . It may help you with working with SSH connections.

Answer 2

The way you are currently doing it blocks beacuse you are not logging out of the hosts for six hours.

Multiprocessing:

If you need to see return codes from the script, you should open your connections to each host using python's multiprocessing module .

nohup:

Another method (that will not allow you to see the script's return value via paramiko ) is to use nohup to disassociate the script from the shell. That will put it in the background and allow you to logout. To do this use...

    ssh.exec_command('nohup ./register.py -time 6 &') 

Typos:

BTW, you had typos in the last loop... ZI2 should be ZI3 in the last loop... furthermore, the for -loops are unnecessary... I fixed your very last iteration... Acks to @johnsyweb for spotting more of the OP's typos than I did...

ssh.connect(ZI3["ip"],username='root', password=ZI3["pass"])
ssh.exec_command('./register.py -time 6')   # <------------- missing s in ssh
ssh.close()

Answer 3

Another way is using Thread if you need do some action based on return of Register.py

See example:

import paramiko
import os
import sys
from threading import Thread

SERVER_LIST = [{"ip":"192.168.1.2","pass":"Administrator"},{"ip":"192.168.1.4","pass":"AdminStudents"},{"ip":"192.168.1.3","pass":"AdminTeachers"}]



class ExecuteRegister(Thread):
    def __init__ (self,options):
        Thread.__init__(self)
        self.options = options       
        self.ssh = paramiko.SSHClient()
        self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())



    def run(self):
        try:
           self.ssh.connect(self.options['ip'],username='root', password=self.options["pass"])
           self.ssh.exec_command('./register.py -time 6') #6 hour so the script still working for 6 hours
           self.ssh.close()
        except:
           print sys.exc_info()



for server in SERVER_LIST:
    Register = ExecuteRegister(server)
    Register.start()