Python3 descarga la base de datos mysql de respaldo del servidor en el local

Hacer una copia de seguridad de la base de datos mysql

Recientemente, he tenido una gran presión. Estoy haciendo operación y mantenimiento con el dinero para la prueba. Se
estima que solo Xiao Diaosi puede entender. .
Xiao Diaosi expresó su insatisfacción. . . .
Como quiero hacer una copia de seguridad de los datos, escribí un script y dejé que se ejecutara solo ~~

# -*- coding:utf-8 -*-
# @Time   : 2020-07-29
# @Author : Dingjs

#DB基本信息
import os
import time
import datetime
import glob
import shutil
"""
Python3.7 来执行mysql数据备份操作
自动保持7天的数据
备份的sql文件名精确到时分秒，这样即使一天备份多次，也不会进行覆盖
"""

#数据库基本信息设定
DB_HOST = '输入数据库地址'
DB_USER = '输入数据库账号'
DB_USER_PASSWORD = '输入数据库密码'
DB_PORT = '端口号3306'

#多库备份
#写法一：把需要备份的库名写到txt文件中，然后读取txt文件内的数据
#DB_NAME = '/backup/dbnames.txt'

#写法二：通过执行sql语句来匹配下载的库
# sqlStr1 = "show databases like 'iot%'"

#单库备份
DB_NAME = 'iot_test'

#备份路径
BACKUP_PATH = '../conn_DB/sql_path/'
#设置编码格式
DB_CharSet = 'utf8'
#创建datatime，作为备份文件名称
DATETIME = time.strftime('%Y%m%d')
#这里主要是做.sql文件的日期区分
DT_time = time.strftime("%Y%m%d_%H%M%S")
TODAYBACKUPPATH = BACKUP_PATH + DATETIME

#保留7天的备份文件
print ('del folder seven days ago')
folders = glob.glob('/backup/dbbackup/*')
today = datetime.datetime.now()
for item in folders:
    try:
        foldername = os.path.split(item)[1]
        day = datetime.datetime.strptime(foldername, "%Y%m%d")
        diff = today - day
        if diff.days >= 7:
            shutil.rmtree(item)
    except:
        pass

print("creating backup folder")
#查看备份文件夹是否存在，不存在，则创建

if not os.path.exists(TODAYBACKUPPATH):
    os.makedirs(TODAYBACKUPPATH)

# Code for checking if you want to take single database backup or assinged multiple backups in DB_NAME.
#开始备份文件
print ("checking for databases names file.")
if os.path.exists(DB_NAME):
    file1 = open(DB_NAME)
    multi = 1
    print("Databases file found...")
    print ("Starting backup of all dbs listed in file " + DB_NAME)
else:
    print ("Databases file not found...")
    print ("Starting backup of database " + DB_NAME)
    multi = 0

# Starting actual database backup process.

if multi:
   in_file = open(DB_NAME,"r")
   flength = len(in_file.readlines())
   in_file.close()
   p = 1
   dbfile = open(DB_NAME,"r")

   while p <= flength:
       # 从数据库读取文件
       db = dbfile.readline()
       db = db[:-1]

       #在python中通过cmd执行mysqldump备份语句
       # dumpcmd = "mysqldump -u " + DB_USER + "-h"+DB_HOST + " -p" + DB_USER_PASSWORD + " " + db + " > " + TODAYBACKUPPATH + "/" + db + ".sql"
       # os.system(dumpcmd)
		#在python中通过cmd来执行mysqldump命令的另一种写法
       os.system( "mysqldump -h%s -u%s -p%s %s --default_character-set=%s > %s/%s_%s.sql" % (
           DB_HOST, DB_USER, DB_USER_PASSWORD, db, DB_CharSet, TODAYBACKUPPATH, DT_time, db))

       p = p + 1
   dbfile.close()
else:
   db = DB_NAME
   # dumpcmd = "mysqldump -u " + DB_USER + " -p" + DB_USER_PASSWORD + " " + db + " > " + TODAYBACKUPPATH + "/" + db + ".sql"
   # os.system(dumpcmd)
   os.system("mysqldump -h%s -u%s -p%s %s --default_character-set=%s > %s/%s_%s.sql" % (
       DB_HOST, DB_USER, DB_USER_PASSWORD, db, DB_CharSet, TODAYBACKUPPATH,DT_time, db))

#结束后，打印执行状态信息
print ("Backup script completed")
print("Your backups has been created in '" + TODAYBACKUPPATH + "' directory")

Durante la ejecución, encontré un problema. Encontré

este problema, principalmente debido a la configuración de mysql.
Bueno, verifique si mysqldump.exe está en la ruta especificada o si está configurado para la variable de entorno del sistema.
> Reinstalé mysql hoy, este tipo de problema ya no existe <

Publicaré los resultados de la
ejecución , ejecutaré una base de datos y

ejecutaré varias bases de datos

Descargue el archivo de datos de respaldo en el local

archivo de respaldo

import os
import paramiko

def RemoteScp(host_ip, host_port, host_username, host_password, remote_file, local_file):
  scp = paramiko.Transport((host_ip, host_port))
  scp.connect(username=host_username, password=host_password)
  sftp = paramiko.SFTPClient.from_transport(scp)
  sftp.get(remote_file, local_file)
  scp.close()
  return ("success")

if __name__ == '__main__':
  host_ip = '输入远程服务器的ip'
  host_port = 22
  host_username = '输入远程服务器的账号'
  host_password = '输入远程服务器的密码'
  remote_path = '输入要备份的文件名称：/conn_DB/test.sql'
  local_path = '输入备份到本地的文件路径就名称：/DB_backup/test.sql'
  RemoteScp(host_ip, host_port, host_username, host_password, remote_path, local_path)

Carpeta de respaldo

import os
import paramiko

def RemoteScp(host_ip, host_port, host_username, host_password, remote_path, local_path):
  scp = paramiko.Transport((host_ip, host_port))
  scp.connect(username=host_username, password=host_password)
  sftp = paramiko.SFTPClient.from_transport(scp)
  try:
    remote_files = sftp.listdir(remote_path)
    for file in remote_files:  #遍历读取远程目录里的所有文件
      local_file = local_path + file
      remote_file = remote_path + file
      sftp.get(remote_file, local_file)
  except IOError:  # 如果目录不存在则抛出异常
    return ("remote_path or local_path is not exist")
  scp.close()


if __name__ == '__main__':
  host_ip = '输入远程服务器的ip'   
  host_port = 22       
  host_username = '输入远程服务器的账号'
  host_password = '输入远程服务器的密码'
  remote_path = '输入要备份的文件夹目录：/conn_DB/'     
  local_path = '输入备份到本地的文件夹目录：/DB_backup/'     
  RemoteScp(host_ip, host_port, host_username, host_password, remote_path, local_path)