pythom导出mysql指定binlog文件

要求

要求本地有py环境和全局环境变量

先测试直接执行binlog命令执行命令

Windows 本地直接执行命令

# E:\output>E:\phpstudy_pro\Extensions\MySQL5.7.26\bin\mysqlbinlog binglog文件地址
# --no-defaults 不限制编码
# -h mysql链接地址
# -u mysql 链接名称
# -p mysql 密码
# -P3306 mysql 端口
# --read-from-remote-server  --raw  mysqlbinlog 命令的一个选项，它指示 mysqlbinlog 从远程 MySQL 服务器读取二进制日志文件进行解析。
# binlog.000003 文件地址



#命令如下

E:\output>E:\phpstudy_pro\Extensions\MySQL5.7.26\bin\mysqlbinlog --no-defaults -h 127.0.0.1 -u root -p -P3306 --read-from-remote-server --raw binlog.000003

代码

import subprocess

def download_binlogs(host, user, password, port, start_binlog, end_binlog, output_path):
    try:
        for binlog_number in range(start_binlog, end_binlog + 1):
            binlog_filename = f"binlog.{str(binlog_number).zfill(6)}"
            output_filename = f"{output_path}/binlog_{binlog_number}.sql"

            # 构建命令
            command = [
                'E:/phpstudy_pro/Extensions/MySQL5.7.26/bin/mysqlbinlog.exe',
                '--no-defaults',
                '-h', host,
                '-u', user,
                '-p' + password,
                '-P' + str(port),
                '--read-from-remote-server',
                '--raw',
                binlog_filename
            ]

            # 运行命令并将输出重定向到文件
            with open(output_filename, 'w') as output_file:
                subprocess.run(command, stdout=output_file)
                output_file.flush()  # 刷新缓冲区

            print(f"Binlog日志文件 '{binlog_filename}' 下载成功！保存为 '{output_filename}'")

    except Exception as e:
        print(f"下载失败：{e}")

if __name__ == "__main__":
    # 替换以下信息为实际的Polardb连接信息和binlog文件范围
    polardb_host = "127.0.0.1"
    polardb_user = "root"
    polardb_password = "root"
    polardb_port = 3306
    start_binlog_number = 1
    end_binlog_number = 3
    output_directory = "E:/output"  # 替换为你想要保存文件的目录

    download_binlogs(polardb_host, polardb_user, polardb_password, polardb_port, start_binlog_number, end_binlog_number, output_directory)