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我通過SSH連接到遠程SQL數據庫。如果我從Linux命令行設置SSH連接（使用ssh-add my_private_key.key，然後使用ssh [email protected]），則連接時間不到一秒鐘。但是如果我使用sshtunnel（在下面的腳本中）使用Python來完成，大約需要70秒。我接受使用Python可能會帶來一些開銷，但不是那麼多！特別是因爲如果我在從命令行連接後運行Python腳本，速度非常快。我需要在腳本中添加哪些內容以使其更快？來自Python的SSH隧道連接太慢
Python腳本：
import pymysql, shlex, shutil, subprocess
import logging
import sshtunnel
from sshtunnel import SSHTunnelForwarder
import iot_config as cfg
def OpenRemoteDB():
global remotecur, remotedb
sshtunnel.DEFAULT_LOGLEVEL = logging.DEBUG
with SSHTunnelForwarder(
(cfg.sshconn['host'], cfg.sshconn['port']),
ssh_username = cfg.sshconn['user'],
ssh_private_key = cfg.sshconn['private_key_loc'],
ssh_private_key_password = cfg.sshconn['private_key_passwd'],
remote_bind_address = ('127.0.0.1', 3306)) as server:
print("OK")
# Main program starts here
OpenRemoteDB()
Python的輸出：
2016-09-20 12:34:15,272 | WARNING | Could not read SSH configuration file: ~/.ssh/config
2016-09-20 12:34:15,305 | INFO | 0 keys loaded from agent
2016-09-20 12:34:15,332 | DEBUG | Private key file (/etc/ssh/my_private_key.key, <class 'paramiko.rsakey.RSAKey'>) successfully loaded
2016-09-20 12:34:15,364 | INFO | Connecting to gateway: mysite.co.uk:22 as user 'user'
2016-09-20 12:34:15,389 | DEBUG | Concurrent connections allowed: True
2016-09-20 12:34:15,409 | DEBUG | Trying to log in with key: b'XXX'
2016-09-20 12:35:26,610 | INFO | Opening tunnel: 0.0.0.0:34504 <> 127.0.0.1:3306