server = SSHTunnelForwarder(
    ssh_address_or_host='33.103.212.66',  # 跳板机B地址
    ssh_port=22,  # 跳板机B端口
    ssh_username='root',
    ssh_password='crmQ@cI@voBe%k!fNdffdafdfsdf',
    # local_bind_address=('127.0.0.1', 22),  # 这里必须填127.0.0.1
    remote_bind_address=('10.111.12.123', 3306) # 目标机器A地址，端口
)
server.start()

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.mysql',
        'HOST': '127.0.0.1',
        'PORT': server.local_bind_port,
        'NAME': 'db_test',
        'USER': 'jusr8pr5kbrj',
        'PASSWORD': 'TbH9&UJR8LZh7oZ7'
                    ''
                    ''
                    '',
        'OPTIONS': {
            'sql_mode': 'traditional',
        }
    }
}