Pythonclickhouse_driver通过ssh连接错误

Question

我的问题已经苦苦挣扎了一个星期，希望你能向我解释这里出了什么问题。

我正在尝试连接远程服务器上的 Clickhouse DB，这是绝对默认设置。所以我正在连接到远程服务器并在我的机器上创建隧道。

import sshtunnel as sshtunnel
from clickhouse_driver import connect

server = sshtunnel.SSHTunnelForwarder(
    ('host', 22),
    ssh_username='username',
    ssh_pkey="username.openssh",
    ssh_private_key_password="password",
    remote_bind_address=('localhost', 8123),
    local_bind_address=('localhost', 555)
)

server.start()
conn = connect(host='localhost', port=555, database='ertb')
cursor = conn.cursor()
cursor.execute('SHOW TABLES')
cursor.fetchall()
server.stop()

我收到这个错误

Traceback (most recent call last):
  File "C:/Users/user/PycharmProjects/alerts/ssh_coonection.py", line 42, in <module>
    cursor.execute('SHOW TABLES')
  File "C:\Users\user\PycharmProjects\alerts\venv\lib\site-packages\clickhouse_driver\dbapi\cursor.py", line 102, in execute
    **execute_kwargs
  File "C:\Users\user\PycharmProjects\alerts\venv\lib\site-packages\clickhouse_driver\client.py", line 205, in execute
    self.connection.force_connect()
  File "C:\Users\user\PycharmProjects\alerts\venv\lib\site-packages\clickhouse_driver\connection.py", line 180, in force_connect
    self.connect()
  File "C:\Users\user\PycharmProjects\alerts\venv\lib\site-packages\clickhouse_driver\connection.py", line 256, in connect
    return self._init_connection(host, port)
  File "C:\Users\user\PycharmProjects\alerts\venv\lib\site-packages\clickhouse_driver\connection.py", line 237, in _init_connection
    self.send_hello()
  File "C:\Users\user\PycharmProjects\alerts\venv\lib\site-packages\clickhouse_driver\connection.py", line 325, in send_hello
    write_binary_str(self.user, self.fout)
  File "C:\Users\user\PycharmProjects\alerts\venv\lib\site-packages\clickhouse_driver\writer.py", line 19, in write_binary_str
    text = text.encode('utf-8')
AttributeError: 'NoneType' object has no attribute 'encode'

我真的试图理解这个 NoneType 对象出现的位置，但有点卡在代码中。

Answer 1

有两个问题：

没有传递用户和密码导致错误'NoneType' 对象没有属性 'encode'
使用了错误的端口访问 CH（clickhouse-driver is designed to communicate with ClickHouse server over native protocol (TCP) that by default use port 9000 for non-secure communication (see Issue connecting to Dockerized Clickhouse Server with Python driver 了解详情））

import sshtunnel as sshtunnel
from clickhouse_driver import connect

with sshtunnel.SSHTunnelForwarder(
    ('localhost', 22),
    ssh_username="root",
    ssh_password="root",
    remote_bind_address=('localhost', 9000)) as server:

    local_port = server.local_bind_port
    print(local_port)

    conn = connect(f'clickhouse://default:@localhost:{local_port}/ertb')
    #conn = connect(host='localhost', port=local_port, database='ertb', user='default', password='')

    cursor = conn.cursor()
    cursor.execute('SHOW TABLES')
    print(cursor.fetchall())

Pythonclickhouse_driver通过ssh连接错误

Python clickhouse_driver through ssh connection error

python

ssh

ssh-tunnel

clickhouse