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python 使用sqlalchemy,mysqldb模块通过ssh隧道连接mysql

2016-11-22 10:37 831 查看

出于安全考虑，数据库服务器只允许堡垒机通过ssh访问，这对日常的使用带来了麻烦。昨天的工作中，就遇到了这样的问题，MySQL数据库放在了服务器A上，只允许服务器B来访问，而我在机器C上，可以通过ssh连接服务器B。为了解决在机器C上连接mysql这个问题。

1：use sqlalchemy

from sshtunnel import SSHTunnelForwarder #Run pip install sshtunnel
from sqlalchemy.orm import sessionmaker #Run pip install sqlalchemy

with SSHTunnelForwarder(
('10.160.1.24', 22), #Remote server IP and SSH port
ssh_username = "<usr>",
ssh_password = "<pwd>",
remote_bind_address=('127.0.0.1', 5432)
) as server:

server.start() #start ssh sever
print 'Server connected via SSH'

#connect to PostgreSQL
local_port = str(server.local_bind_port)
engine = create_engine('postgresql://<db_user>:<db_pwd>@127.0.0.1:' + local_port +'/<db_name>')

Session = sessionmaker(bind=engine)
session = Session()

print 'Database session created'

#test data retrieval
test = session.execute("SELECT * FROM <table_name>")

2： use mysqldb

[python] view
plain copy

import MySQLdb

from sshtunnel import SSHTunnelForwarder



with SSHTunnelForwarder(

         ('sshhost.domain.com', 22),    #B机器的配置

         ssh_password="sshpasswd",

         ssh_username="sshusername",

         remote_bind_address=('mysqlhost.domain.com', 3306)) as server:  #A机器的配置



    conn = MySQLdb.connect(host='127.0.0.1',              #此处必须是是127.0.0.1

                           port=server.local_bind_port,

                           user='user',

                           passwd='password',

                           db='dbname')

2down
vote

You could use the SSHTunnel library as follows:

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