Python 4.1.1 SDK and connecting to Servers with version less than 6.6

Python SDK
1

I am trying to connect to a couchbase cluster running on version < 6.6 and I am getting this error while using python SDK

Code:

from datetime import timedelta

# needed for any cluster connection
from couchbase.auth import PasswordAuthenticator
from couchbase.cluster import Cluster
# needed for options -- cluster, timeout, SQL++ (N1QL) query, etc.
from couchbase.options import (ClusterOptions, ClusterTimeoutOptions,
                               QueryOptions)

# Update this to your cluster
username = "The actual user"
password = "The correct password"
bucket_name = "The_Bucket"
# User Input ends here.

# Connect options - authentication
auth = PasswordAuthenticator(
    username,
    password,
)

# Get a reference to our cluster
# NOTE: For TLS/SSL connection use 'couchbases://<your-ip-address>' instead
cluster = Cluster('couchbase://abc.test.com', ClusterOptions(auth))

# get a reference to our bucket
cb = cluster.bucket(bucket_name)

# Wait until the cluster is ready for use.
cluster.wait_until_ready(timedelta(seconds=5))

Error:

AuthenticationException                   Traceback (most recent call last)
<ipython-input-15-9443e614a719> in <module>
     23 # Get a reference to our cluster
     24 # NOTE: For TLS/SSL connection use 'couchbases://<your-ip-address>' instead
---> 25 cluster = Cluster('couchbase://abc.test.com', ClusterOptions(auth))
     26 
     27 # get a reference to our bucket

/idn/home/user/venv/test/test1/lib/python3.7/site-packages/couchbase/cluster.py in __init__(self, connstr, *options, **kwargs)
     97 
     98         super().__init__(connstr, *options, **kwargs)
---> 99         self._connect()
    100 
    101     @BlockingWrapper.block(True)

/idn/home/user/test/test1/ve_magics/lib/python3.7/site-packages/couchbase/logic/wrappers.py in wrapped_fn(self, *args, **kwargs)
     99                         e._message = ('If using Couchbase Server < 6.6, '
    100                                       'a bucket needs to be opened prior to cluster level operations')
--> 101                     raise e
    102                 except Exception as ex:
    103                     exc_cls = PYCBC_ERROR_MAP.get(ExceptionMap.InternalSDKException.value, CouchbaseException)

/idn/home/user/test/test1/ve_magics/lib/python3.7/site-packages/couchbase/logic/wrappers.py in wrapped_fn(self, *args, **kwargs)
     83             def wrapped_fn(self, *args, **kwargs):
     84                 try:
---> 85                     ret = fn(self, *args, **kwargs)
     86                     if isinstance(ret, BaseCouchbaseException):
     87                         raise ErrorMapper.build_exception(ret)

/idn/home/user/test/test1/ve_magics/lib/python3.7/site-packages/couchbase/cluster.py in _connect(self, **kwargs)
    103         ret = super()._connect_cluster(**kwargs)
    104         if isinstance(ret, BaseCouchbaseException):
--> 105             raise ErrorMapper.build_exception(ret)
    106         self._set_connection(ret)
    107 

AuthenticationException: <ec=6, category=couchbase.common, message=authentication_failure (6). Possible reasons: incorrect authentication configuration, bucket doesn't exist or bucket may be hibernated., C Source=/home/ec2-user/workspace/python/sdk/python-manylinux-wheel-pipeline/couchbase-python-client/src/connection.cxx:199>

Any suggestions ?

2

The issue is happening if the username is like this “svc.testid”. If I give the bucket user, it is going through

3

Hi @himanshu.mps - This seems like an environment issue. Are you sure the credentials are correct? There should not be a problem with a user name of “svc.testid” if that user exists. Also, what do you mean by “bucket user”? Also, it might be beneficial to provide logs (PYCBC_LOG_LEVEL=debug python3 ).

4

The issue was because the user was ldap user and we had to change the connection string to specify ldap authentication

5

So you needed to use PasswordAuthenticator’s static ldap_compatible() method? Just want to make sure other users can see what the solution was.

7

I created the cluster connection this way

cluster = Cluster('couchbase://cluster.com?sasl_mech_force=PLAIN', ClusterOptions(auth))