如何传递用户名和密码到cassandra在python [英] How to pass along username and password to cassandra in python

问题描述

我正在学习，只是设置我的cassandra集群，并试图使用python作为客户端与它进行交互。在yaml中，我将验证器设置为PasswordAuthenticator。

现在我打算提供我的用户名和密码给connect函数，但没有找到它们放在哪里。

  cluster = Cluster（hosts）
 session = cluster.connect（keyspace）
  

基本上，您只提供主机和键空间。文档类型建议与匿名的连接？
http://datastax.github.io/python-driver/getting_started。 html＃connecting-to-cassandra

如果我只是使用示例，我会收到以下错误

  raise NoHostAvailable（无法连接到任何服务器，错误）
 cassandra.cluster.NoHostAvailable：（'无法连接到任何服务器'，{'hou722067 '：AuthenticationFailed（'Remote end requires authentication。'，}} 
  

一些配置文件？它似乎是一个非常基本的功能，我不能想象它没有涵盖在python客户端驱动程序。

总之，我的问题是：如何使用python登录cassandra？

提前感谢任何提示！

========================== ======================
有了它。

我应该提供auth_provider字段中的用户名和密码，该字段返回包含具有适当字符串值的username和password键的字典。

类似
def getCredential（self，host）：
credential = {'username'：'myUser'，'password'：'myPassword'}
返回凭证

cluster = Cluster（nodes，auth_provider = getCredential）

解决方案

按照ops建议使用：

 从cassandra.cluster导入集群
 
 def getCredential（self）：
 return {'username'：'foo' ，'password'：'bar'} 
 
 node_ips = ['0.0.0.0'，'0.0.0.1'] 
 
 cluster = Cluster（node_ips，protocol_version = 1， auth_provider = getCredential）
 session = cluster.connect（）
  

版本2，那么您必须使用AuthProvider对象进行身份验证。 EX：

 从cassandra.auth导入PlainTextAuthProvider 
从cassandra.cluster导入集群
 
 ap = PlainTextAuthProvider（username = foo，password = bar）
c = Cluster（protocol_version = 2，auth_provider = ap）
s = c.connect（）
  pre> 
 
 
有人可以使用这些方法中的任何一种解释最佳做法，以便使用远程群集进行身份验证？
 
I'm learning and just setup my cassandra cluster and trying to use python as the client to interact with it. In the yaml, I set the authenticator to be PasswordAuthenticator.

So now I plan to provide my username and password over to the connect function but find no where to put them.
cluster = Cluster(hosts)
session = cluster.connect(keyspace)
Basically, you provide only the host and the keyspace. The documentation kind of suggest a connection with anonymous?
http://datastax.github.io/python-driver/getting_started.html#connecting-to-cassandra

If I just use the example, I will get the following error
raise NoHostAvailable("Unable to connect to any servers", errors)
cassandra.cluster.NoHostAvailable: ('Unable to connect to any servers', {'hou722067': AuthenticationFailed('Remote end requires authentication.',)})
Is the authentication information supplied through some config files? It seems like a very basic functionality and I can't imagine it's not covered in the python client driver. I must have miss something.

In short, my question is: How do I login to cassandra using python?

Thanks in advance for any hint possible!

=================================================
Got it figured.

I should provide the username and password in the auth_provider field which is a function returning a dictionary containing ‘username’ and ‘password’ keys with appropriate string values.

Something like
def getCredential(self, host):
                credential = {'username':'myUser', 'password':'myPassword'}
                return credential

cluster = Cluster(nodes, auth_provider=getCredential)
解决方案
Following the ops recommendation use:
from cassandra.cluster import Cluster

def getCredential(self):
    return {'username': 'foo', 'password': 'bar'} 

node_ips = ['0.0.0.0', '0.0.0.1']

cluster = Cluster(node_ips, protocol_version=1, auth_provider=getCredential)
session = cluster.connect()
If you're using protocol version 2 then you must authenticate with an AuthProvider object. EX:
from cassandra.auth import PlainTextAuthProvider
from cassandra.cluster import Cluster

ap = PlainTextAuthProvider(username=foo, password=bar)
c = Cluster(protocol_version=2, auth_provider=ap)
s = c.connect()
Can someone can explain best practices using either of these methods to authenticate with a remote cluster?

                        
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