python脚本实现本地或远程执行命令

功能：
1、执行本地shell命令，执行完成后获取结果
2、执行本地shell命令，执行中实时获取输出结果
3、执行远程shell命令，执行完成后获取结果
4、执行远程shell命令，执行中实时获取输出结果

实际操作：
1、安装paramiko

apt-get install  python3-pip libevent-dev libffi-dev libssl-dev -y
pip3 install paramiko -i https://pypi.mirrors.ustc.edu.cn/simple/  --trusted-host Https://pypi.mirrors.ustc.edu.cn

2、创建脚本

root@om:~# mkdir /scripts/python -p
root@om:~# touch /scripts/Python/shell.py
root@om:~# cat /scripts/python/shell.py
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import subprocess
import paramiko
import re
import sys
class Cmd(object):
    def onetime_shell(self,cmd):
        cmd = subprocess.Popen(cmd,shell=True,stdout=subprocess.PIPE)
        cmd = cmd.communicate()
        cmd = cmd[0].decode().rstrip()
        return cmd
    def realtime_shell(self,cmd):
        cmd = subprocess.call(cmd, shell=True)
        return cmd
class Remote_cmd(object):
    def __init__(self,PrivateKey,IP,Port,User):
        self.private_key = paramiko.RSAKey.from_private_key_file(PrivateKey)
        self.ssh = paramiko.SSHClient()
        self.set_missing_host_key_policy = self.ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
        self.connect = self.ssh.connect(hostname=IP, port=Port, username=User,pkey=self.private_key)
    def onetime_shell(self,cmd,notice=False):
        stdin, stdout, stderr = self.ssh.exec_command(cmd)
        result = stdout.read().decode('utf-8').rstrip()
        if notice:
           self.ssh.close()
        return result

    def realtime_shell(self,cmd,notice=False):
        try:
           stdin, stdout, stderr = self.ssh.exec_command(cmd)
           for line in stdout:
               print(line.strip("\n"))
           for error in stderr:
               print(error.strip("\n"))
           if notice:
              self.ssh.close()
        except Exception as e:
           print("execute command %s error, error message is %s" % (cmd, e))
           return ""

例子：
1、本地执行shell命令，执行完成后获取结果：
mkdir /tmp/shell #创建目录/tmp/shell
echo shell >> /tmp/shell/shell.log # 输出shell 写入/tmp/shell/shell.log
2、本地执行shell命令，实时获取输出结果
apt-get update #更新
3、远程执行shell命令，执行完成后获取结果
mkdir /tmp/remote_shell #创建目录/tmp/remote_shell
echo remote_shell >> /tmp/remote_shell/remote_shell.log #输出remote_shell写入/tmp/remote_shell/remote_shell.log
4、远程执行shell命令，实时获取输出结果
apt-get update #更新

root@om:~# cat exec_shell.py 
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import sys
sys.path.append('/scripts/python/')
from shell import Cmd,Remote_cmd
class ExecShell (object):
   def __init__(self):
       self.cmd = Cmd()
       self.remote_nfs_server = Remote_cmd('/root/.ssh/id_rsa','nfs-server','22','root')
   def local_onetime_shell(self):
       print("执行本地shell命令，执行完成后获取结果")
       self.cmd.onetime_shell('mkdir /tmp/shell')
       self.cmd.onetime_shell('echo shell >> /tmp/shell/shell.log')
       re = self.cmd.onetime_shell('cat  /tmp/shell/shell.log')
       print(re)
   def local_realtime_shell(self):
       print("执行本地shell命令，执行中实时获取输出结果")
       self.cmd.realtime_shell('apt-get update')
   def remote_onetime_shell(self):
       print("执行远程shell命令，执行完成后获取结果")
       self.remote_nfs_server.onetime_shell('mkdir /tmp/remote_shell')
       self.remote_nfs_server.onetime_shell('echo remote_shell >> /tmp/remote_shell/remote_shell.log')
       re = self.remote_nfs_server.onetime_shell('cat /tmp/remote_shell/remote_shell.log')
       print(re)
   def remote_realtime_shell(self):
       print("执行远程shell命令，执行中实时获取输出结果")
       self.cmd.realtime_shell('apt-get update')
execshell = ExecShell()
execshell.local_onetime_shell()
execshell.local_realtime_shell()
execshell.remote_onetime_shell()
execshell.remote_realtime_shell()

# 执行脚本结果
root@om:~# ./exec_shell.py 
执行本地shell命令，执行完成后获取结果
shell
执行本地shell命令，执行中实时获取输出结果
Hit:1 http://mirrors.aliyun.com/Docker-ce/linux/ubuntu xenial InRelease
Get:2 http://repo.percona.com/apt jessie InRelease [15.9 kB]                                                                                                                            
Hit:3 http://us.arcHive.ubuntu.com/ubuntu xenial InRelease                                                                                                   
Get:4 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB]                                
Hit:5 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease                                                   
Ign:2 http://repo.percona.com/apt jessie InRelease                                  
Hit:6 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease                
Fetched 123 kB in 1s (68.6 kB/s)                             
Reading package lists... Done
W: GPG error: http://repo.percona.com/apt jessie InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9334A25F8507EFA5
W: The repository 'http://repo.percona.com/apt jessie InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
执行远程shell命令，执行完成后获取结果
remote_shell
执行远程shell命令，执行中实时获取输出结果
Hit:1 http://mirrors.aliyun.com/docker-ce/linux/ubuntu xenial InRelease
Get:2 http://repo.percona.com/apt jessie InRelease [15.9 kB]                                                                                                                            
Hit:3 http://us.archive.ubuntu.com/ubuntu xenial InRelease                                                                                                   
Get:4 http://security.ubuntu.com/ubuntu xenial-security InRelease [107 kB]                                
Hit:5 http://us.archive.ubuntu.com/ubuntu xenial-updates InRelease                                                   
Ign:2 http://repo.percona.com/apt jessie InRelease                                  
Hit:6 http://us.archive.ubuntu.com/ubuntu xenial-backports InRelease                
Fetched 123 kB in 1s (63.9 kB/s)                             
Reading package lists... Done
W: GPG error: http://repo.percona.com/apt jessie InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9334A25F8507EFA5
W: The repository 'http://repo.percona.com/apt jessie InRelease' is not signed.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.