正确使用SSHTunnel

Question

我正在尝试在python2.7中使用pymysql和sshtunnel来隧道连接，以便我可以连接到只能通过堡垒服务器访问的mysql实例。堡垒服务器的主机名为BASTIONIP，该服务器可以毫无问题地连接到MYSQLHOST。但是，python似乎无法通过隧道连接。以下是我的代码：

    with sshtunnel.SSHTunnelForwarder(
            (BASTIONIP, 22),
            ssh_username='dataengineer',
            ssh_pkey="/Users/USERNAME/.ssh/id_rsa",
            remote_bind_address=(MYSQLHOST, 3306),
            local_bind_address=(MYSQLHOST, 3306)
    ) as tunnel:
        self.DB = {'con': pymysql.connect(host=MYSQLHOST,
                                          user=USERNAME,
                                          passwd=PASSWORD,
                                          db=DBNAME,
                                          port=tunnel.local_bind_port,
                                          charset='utf8',
                                          autocommit=True)}
        self.DB['cursor'] = self.DB['con'].cursor(pymysql.cursors.DictCursor)

但是，当我尝试连接时，我收到以下错误：

  File "/Library/Python/2.7/site-packages/sshtunnel.py", line 1378, in _get_local_interfaces
    local_if = socket.gethostbyname_ex(socket.gethostname())[-1]
gaierror: [Errno 8] nodename nor servname provided, or not known

谁能指出我做错了什么？

Answer 1

下面提到我在谷歌搜索之后可能弄清楚的可能原因：

1. 不确定，它是由_get_local_interfaces尝试解析本地主机名并失败（可能只是一个坏的/ etc / hosts文件或其他东西）引起的

尝试以root /etc/hosts文件打开，并添加如下所示的行

# IP ADDR      HOSTNAME
192.168.1.1    your_desired_hostname

并且名称应该解决。用您的IP地址更新192.168.1.1。 Here

2. 另一项决议：替换：

local_if = socket.gethostbyname_ex(socket.gethostname())[-1]

同

  try:
    local_if = socket.gethostbyname_ex(socket.gethostname())[-1]
except:
    local_if = []

Here

Answer 2

奇迹般有效。

In [1]: from sshtunnel import SSHTunnelForwarder
   ...:     ...: 
   ...:     ...: with SSHTunnelForwarder(
   ...:     ...:     ('xx.xx.xx.xx', 22),
   ...:     ...:     ssh_username='deploy',
   ...:     ...:     ssh_pkey='~/.ssh/id_rsa',
   ...:     ...:     remote_bind_address=('127.0.0.1', 3306),
   ...:     ...:     local_bind_address=('0.0.0.0', 3307)
   ...:     ...: ) as tunnel:
   ...:     ...:     print('pass')
   ...: 
   ...:     
pass