Python——操作远程服务器

本人最近遇到的一些有关于定期执行的服务器上的脚本的问题，于是本人通过的利用python中的paramiko架包来实现对远程的一个控制。执行需要制定的脚本的命令。

pip install paramiko

#!/usr/bin/env python
import socket

import paramiko
paramiko.util.log_to_file('paramiko.log')

hostname = '192.168.25.138'
username = 'root'
password = 'xjl'


def connect_remote_invoke_cmd():
    client = paramiko.SSHClient()
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    client.connect(hostname=hostname, username=username, password=password)
    stdin, stdout, stderr = client.exec_command('docker images')
    output_date = str(stdout.read())[2:-1].split("\n")
    for data in output_date:
        print(data)
    print("----------------------------------------------------------------------------")
    stdin, stdout, stderr = client.exec_command('docker search mysql')
    result = (str(stdout.read(), encoding="utf-8"))[2:-1].split("\n")
    for data in result:
        print(data)
    print("----------------------------------------------------------------------------")
    stdin, stdout, stderr = client.exec_command('docker ps -a')
    result = (str(stdout.read(), encoding="utf-8"))[2:-1].split("\n")
    for data in result:
        print(data)
    client.close()

if __name__ == '__main__':
    connect_remote_invoke_cmd()

• paramiko模块exec_command()函数是将服务器执行完的结果一次性返回给你；
• invoke_shell()函数类似shell终端，可以将执行结果分批次返回，看到任务的执行情况，不会因为执行一个很长的脚本而不知道是否执行成功。

#!/usr/bin/env python
import socket

import paramiko
import timer

paramiko.util.log_to_file('paramiko.log')

hostname = '192.168.25.138'
username = 'root'
password = 'xjl'


def connect_remote_invoke_cmd():
    """
    连接远程服务器并执行的cmd命令
    :return:
    """
    client = paramiko.SSHClient()
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    client.connect(hostname=hostname, username=username, password=password)
    stdin, stdout, stderr = client.exec_command('docker images')
    output_date = str(stdout.read())[2:-1].split("\n")
    for data in output_date:
        print(data)
    print("----------------------------------------------------------------------------")
    stdin, stdout, stderr = client.exec_command('docker search mysql')
    result = (str(stdout.read(), encoding="utf-8"))[2:-1].split("\n")
    for data in result:
        print(data)
    print("----------------------------------------------------------------------------")
    stdin, stdout, stderr = client.exec_command('docker ps -a')
    result = (str(stdout.read(), encoding="utf-8"))[2:-1].split("\n")
    for data in result:
        print(data)
    client.close()

def exec_command_test():
    """
    连接远程服务器并将服务器执行完的结果一次性返回给你；
    :return:
    """
    cmd=""
    client = paramiko.SSHClient()
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    client.connect(hostname=hostname, username=username, password=password)
    stdin, stdout, stderr = client.exec_command(cmd)
    result = (str(stdout.read(), encoding="utf-8"))[2:-1]
    return result


def invoke_shell_test():
    """
    连接远程服务器并将服务器执行完的并查询返回的结果
    :return: 
    """
    cmd = ""
    client = paramiko.SSHClient()
    # 允许将信任的主机自动加入到host_allow 列表，此方法必须有，且必须放在connect方法的前面，否则报错
    client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
    # 连接服务器
    client.connect(hostname=hostname, username=username, password=password)
    # 激活terminal
    channel=client.invoke_shell()
    # 向服务器发送commond
    channel.send(cmd+"n")
    while True:
        timer.set_timer(1)
        # 接受服务器的返回值
        stoud = channel.recv(1024)
        # 查询返回的执行结果
        print(stoud.decode('utf-8'))
    

if __name__ == '__main__':
    connect_remote_invoke_cmd()