python连接服务器执行命令进行部署

说明

部署时需要执行linux命令,可以使用shell脚本。但我更希望全程部署使用python实现,因此有了此文,作为记录。

参考文章:
python3模拟实现xshell远程执行linux命令的方法

代码


# -*- coding: UTF-8 -*-
import os
import time
import paramiko


class MyLinux(object):
    # 通过IP, 用户名,密码,超时时间初始化一个远程Linux主机
    def __init__(self, ip, username, password, timeout=30):
        self.ip = ip
        self.username = username
        self.password = password
        self.timeout = timeout
        # transport和chanel
        self.t = ''
        self.chan = ''
        # 链接失败的重试次数
        self.try_times = 3

    # 调用该方法连接远程主机
    def connect(self):
        while True:
            # 连接过程中可能会抛出异常,比如网络不通、链接超时
            try:
                self.t = paramiko.Transport(sock=(self.ip, 22))
                self.t.connect(username=self.username, password=self.password)
                self.chan = self.t.open_session()
                self.chan.settimeout(self.timeout)
                self.chan.get_pty()
                self.chan.invoke_shell()
                # 如果没有抛出异常说明连接成功,直接返回
                print('连接%s成功' % self.ip)
                # 接收到的网络数据解码为str
                return
            except Exception as e1:
                if self.try_times != 0:
                    print('连接%s失败,进行重试' % self.ip)
                    self.try_times -= 1
                else:
                    print('重试3次失败,结束程序')
                    exit(1)

    # 断开连接
    def close(self):
        # 如果要运行服务,不能关闭连接
        self.chan.close()
        self.t.close()

    # 发送要执行的命令
    def send(self, cmd):
        cmd += '\r'
        # 发送要执行的命令
        self.chan.send(cmd)
        # 回显很长的命令可能执行较久,通过循环分批次取回回显,执行成功返回true,失败返回false
        result = ''
        while True:
            time.sleep(0.5)
            ret = self.chan.recv(65535)
            result += ret.decode('utf-8')
            if len(ret) < 65535:
                break
        print(result.replace(result.split("\n")[-1], "").strip("\n"))

    def upload_file(self, upload_files, upload_path):
        """
        上传文件
        :param upload_files: 上传文件路径 例如:/tmp/test.py
        :param upload_path: 上传到目标路径 例如:/tmp/test_new.py
        :return:
        """
        try:
            tran = paramiko.Transport(sock=(self.ip, self.port))
            tran.connect(username=self.username, password=self.password)
            sftp = paramiko.SFTPClient.from_transport(tran)
            result = sftp.put(upload_files, upload_path)
            return True if result else False
        except Exception as ex:
            print(ex)
            tran.close()
        finally:
            tran.close()

    def replace_file_cmd(self, from_file, to_file):
        """替换文件"""
        cmd = f"cp {from_file} {to_file}"
        self.send(cmd)

    def replace_file(self, deploy_dir, project_from_file, project_to_file):
        """部署路径下的文件替换"""
        from_file = os.path.join(deploy_dir, project_from_file)
        to_file = os.path.join(deploy_dir, project_to_file)
        self.replace_file_cmd(from_file, to_file)

    def replace_text_file(self, from_text, to_text, file):
        """替换文件中的文本"""
        cmd = f"sed -e 's/{from_text}/{to_text}/g' {file} "
        self.send(cmd)


def my_deploy():
    host = MyLinux('172.27.11.200', 'rst', 'rst.2020')  # 传入Ip,用户名,密码
    host.connect()
    # 根据8001端口号杀死服务进程
    host.send(" ps -ef | grep 8001 | grep -v grep | cut -c 9-16 | xargs kill -s 9")  
    host.send("conda activate django ")
    host.send("cd /forest_monitor ")
    host.send("nohup python manage.py runserver 0:8001 &")
    # 如果要运行服务,不能关闭连接
    # host.close()


if __name__ == '__main__':
    my_deploy()

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