LDAP Error on JupyterHub 0.10.6 on k8s

JupyterHub Zero to JupyterHub on Kubernetes
,
1

Hi, I am trying to enable LDAP on jupyterhub on k8s deployed through helm.
I have deployes jhub v 0.10.6.
I set these parameter in config.yaml:

auth:
  type: ldap
  ldap:
    server:
      address: 111.11.111.11
      ssl: false
    dn:
      lookup: true
      search:
        filter: '({login_attr}={login})'
        user: 'XXXX'
        password: 'XXXX'
      templates:
        - '{username}'
      user:
        searchBase: 'OU=People,DC=xxxx,DC=it'
        escape: false
        attribute: 'sAMAccountName'
        dnAttribute: 'userPrincipalName'

I receive internal erro when I execute authentication and I get this error in hub pod:

[E 2021-02-05 10:03:49.081 JupyterHub web:1789] Uncaught exception POST /hub/login?next=%2Fhub%2F (172.20.254.219)
    HTTPServerRequest(protocol='http', host='jhub.gstp.k8s.altecspace.it', method='POST', uri='/hub/login?next=%2Fhub%2F', version='HTTP/1.1', remote_ip='172.20.254.219')
    Traceback (most recent call last):
      File "/usr/local/lib/python3.8/dist-packages/tornado/web.py", line 1704, in _execute
        result = await result
      File "/usr/local/lib/python3.8/dist-packages/jupyterhub/handlers/login.py", line 144, in post
        user = await self.login_user(data)
      File "/usr/local/lib/python3.8/dist-packages/jupyterhub/handlers/base.py", line 747, in login_user
        authenticated = await self.authenticate(data)
      File "/usr/local/lib/python3.8/dist-packages/jupyterhub/auth.py", line 459, in get_authenticated_user
        authenticated = await maybe_future(self.authenticate(handler, data))
      File "/usr/local/lib/python3.8/dist-packages/ldapauthenticator/ldapauthenticator.py", line 361, in authenticate
        username, resolved_dn = self.resolve_username(username)
      File "/usr/local/lib/python3.8/dist-packages/ldapauthenticator/ldapauthenticator.py", line 236, in resolve_username
        conn = self.get_connection(
      File "/usr/local/lib/python3.8/dist-packages/ldapauthenticator/ldapauthenticator.py", line 314, in get_connection
        conn = ldap3.Connection(
      File "/usr/local/lib/python3.8/dist-packages/ldap3/core/connection.py", line 356, in __init__
        self._do_auto_bind()
      File "/usr/local/lib/python3.8/dist-packages/ldap3/core/connection.py", line 384, in _do_auto_bind
        if self.start_tls(read_server_info=False):
      File "/usr/local/lib/python3.8/dist-packages/ldap3/core/connection.py", line 1307, in start_tls
        if self.server.tls.start_tls(self) and self.strategy.sync:  # for asynchronous connections _start_tls is run by the strategy
      File "/usr/local/lib/python3.8/dist-packages/ldap3/core/tls.py", line 277, in start_tls
        raise LDAPStartTLSError(connection.last_error)
    ldap3.core.exceptions.LDAPStartTLSError: startTLS failed - unavailable

Can anyone help me?
Thanks

2

Please use backticks for the config to maintain the indention.