Batch host management using python

In Daily O & M work, batch host management is very common. There are also a lot of software on the market for batch host management, but sometimes these software cannot fully meet our needs. In python, the module about batch host management is provided. today, let's take a look at how to use python to implement batch host management. in Daily O & M work, batch host management is very common, there are also a lot of software for batch host management on the market, but sometimes these software cannot fully meet our needs. In python, the module about batch host management is provided. today, let's take a look at how to implement batch host management using python.

Python provides three main modules for batch host management: paramiko, fabric, and pexpect. today we mainly talk about the paramiko module, and the paramiko module is a third-party module.

Installation: pip install paramiko or yum install python-paramiko. if installation fails, use the source code for installation.

SOURCE package: https://github.com/paramiko/paramiko/archive/master.zip

Common operations:

Ssh = paramiko. SSHClient () // instantiation, ssh session class

Ssh. set_missing_host_key_policy (paramiko. AutoAddPolicy () // The first connection automatically returns yes

Ssh. connect ('server IP', port, 'username', 'password') // connect to the server

Stdin, stdout, stderr = ssh.exe c_command ("command") // run the command, standard output, return successful command, return failed command

Ssh. close () // close the connection

Upload and download:

Get_put = paramiko. Transport (ip, port) // server ip address and port (used when SFTP is used)

Get_put.connect (username = "root", password = "123.com") // connect to the server, user name, and password

Sftp = paramiko. SFTPClient. from_transport (get_put) // use the SFTP protocol

Sftp. put (the file to be uploaded, the location where the uploaded file is saved) // Upload

Sftp. get (Download location, download location) // download

Batch host management:

#! /Usr/bin/python

#-*-Coding: UTF-8 -*-

Import paramiko

Import OS

Def Connect (ip = '2017. 0.0.1 ', Port = 22, user = 'root', pwd = '2017. com '):

Ssh = paramiko. SSHClient ()

Ssh. set_missing_host_key_policy (paramiko. AutoAddPolicy ())

Ssh. connect (hostname = ip, port = Port, username = user, password = pwd) # connect to the server

Return ssh # return server handle

Def IP_ADD (ip): # determines whether the user inputs an address or an address range.

_ Ip = ip. split ('--')

If len (_ ip) = 2: # if it is an address range

Ip_add = _ ip [0] # retrieve the ip address

Ip_range = int (_ ip [1]) # retrieve the maximum value of an ip address

Host_ip_split = ip_add.split ('.') # Separate the ip addresses by. into 4 segments.

Host_ip = int (host_ip_split.pop () # obtain the minimum ip address.

Ip_3 = '.'. join (host_ip_split) + '.' # splice the remaining parts that have been removed from the minimum ip value.

Host_add_range = range (host_ip, ip_range + 1) # Generate the connection ip range

Add_pool = []

For I in host_add_range:

Add = ip_3 + str (I) # splice to a valid IP address

Add_pool.append (add) # generate an address pool

Return add_pool # return address pool

Elif len (_ ip) = 1: # if the input is a single address

Valid_ip = _ ip [0]

Ip_value = valid_ip.split ('.') [0: 4] # Check ip validity

[Int (I) for I in ip_value]

Return _ ip # return address

If _ name _ = '_ main __':

OS. system ('clear ')

Fa = True

While Fa:

Ip = raw_input ('Enter an ip address or address range :')

Exclude_ip = raw_input ('Enter the address to be excluded :')

Try:

Ip_list = IP_ADD (ip) # hand over the ip address entered by the user to the function for processing

If exclude_ip.strip (): # determine whether the user wants to exclude the addresses in the address pool.

Exclude_add = exclude_ip.split (',') # define the exclusion format

[Ip_list.remove (I) for I in exclude_add] # exclude IP addresses

Fa = False # exit the loop

Except t:

Print '\ 033 [31m address format error \ 033 [0m'

Print ''' example:

127.0.0.1 perform operations on a single host

127.0.0.1 -- 254 perform operations on hosts in the same address range

127.0.0.8, 127.0.0.10 exclude addresses in the address pool

'''

Continue

Print '\ 033 [31m input script_exit exit program \ 033 [0m'

While True:

Shell_comd = raw_input ('Enter the command to execute: ') # The command to be executed

If shell_comd = 'script _ exit ':

Break

For I in ip_list: # Loop address pool

Try:

Comd = Connect (ip = I) # Connect to the server

Stdin, stdout, stderr = comd.exe c_command (shell_comd) # run the command

Stderr = stderr. read () # Result of correct command execution

Stdout = stdout. read () # command executed incorrectly

If stdout:

Print '\ 033 [31 m ++ % s ++ \ 033 [0m' % I

# Commands executed by that server

Print stdout

Else:

Print '\ 033 [31 m ++ % s ++ \ 033 [0m' % I

Print stderr

Except t:

Print '\ 033 [31 m % s connection failed \ 033 [0m' % I

Paramiko can also be used to download and upload files in batches. The principle is basically the same as that of executing commands in batches.

The above describes how to implement batch host management using python. For more information, see other related articles in the first PHP community!