Configuration de l'authentification Kerberos à l'aide du centre de distribution de clés local et du centre de distribution de clés Active Directory

Le cluster Big Data Service provisionne le KDC MIT local par défaut. Le cluster peut également être provisionné pour utiliser le KDC Active Directory pour les utilisateurs appartenant au domaine Active Directory. Vous devez également configurer la confiance croisée entre les deux domaines.

Mise à jour d'Ambari pour utiliser le KDC Active Directory

  1. Accédez à Apache Ambari.
  2. Dans la barre d'outils latérale, sous Administration du cluster, sélectionnez Kerberos.
  3. Sélectionnez l'onglet Configurations, puis développez la section Advanced krb5-conf.
  4. Modifiez le champ Modèle krb5-conf à l'image du contenu suivant :
    {#
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    # distributed with this work for additional information
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    # to you under the Apache License, Version 2.0 (the
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    [libdefaults]
      renew_lifetime = 7d
      forwardable = true
      default_realm = {{realm}}
      ticket_lifetime = 24h
      dns_lookup_realm = false
      dns_lookup_kdc = false
      #default_ccache_name = /tmp/krb5cc_%{uid}
      #default_tgs_enctypes = {{encryption_types}}
      #default_tkt_enctypes = {{encryption_types}}
    {% if domains %}
    [domain_realm]
    {%- for domain in domains.split(',') %}
      {{domain|trim()}} = {{realm}}
    {%- endfor %}
    {% endif %}
      example.oraclevcn.com = <ad-realm>
     
    [logging]
      default = FILE:/var/log/krb5kdc.log
      admin_server = FILE:/var/log/kadmind.log
      kdc = FILE:/var/log/krb5kdc.log
     
    [realms]
      {{realm}} = {
    {%- if master_kdc %}
        master_kdc = {{master_kdc|trim()}}
    {%- endif -%}
    {%- if kdc_hosts > 0 -%}
    {%- set kdc_host_list = kdc_hosts.split(',')  -%}
    {%- if kdc_host_list and kdc_host_list|length > 0 %}
        admin_server = {{admin_server_host|default(kdc_host_list[0]|trim(), True)}}
    {%- if kdc_host_list -%}
    {%- if master_kdc and (master_kdc not in kdc_host_list) %}
        kdc = {{master_kdc|trim()}}
    {%- endif -%}
    {% for kdc_host in kdc_host_list %}
        kdc = {{kdc_host|trim()}}
    {%- endfor -%}
    {% endif %}
    {%- endif %}
    {%- endif %}
      }
     
    {# Append additional realm declarations below #}
      <ad-realm> = {
        admin_server = server-example.oraclevcn.com:749
        kdc = kdc-example.oraclevcn.com:88
        default_domain = domain-example.oraclevcn.com
      }
     
    [capaths]
    <ad-realm> = {
    <your-local-realm> = .
    }
  5. Enregistrez la configuration et redémarrez tous les services concernés.
  6. Accédez à HDFS > Configurations > Avancé > core-site avancé.
  7. Modifiez le paramètre hadoop.security.auth_to_local comme suit :
    RULE:[1:$1@$0](.*@<ad-realm>)s/@.*//

    Exemple :

    RULE:[2:$1@$0](yarn@EXAMPLE.ORACLE.COM)s/.*/yarn/
    RULE:[2:$1@$0](yarn-ats-hbase@EXAMPLE.ORACLE.COM)s/.*/yarn-ats/
    RULE:[1:$1@$0](.*@EXAMPLE.REALM)s/@.*//
    DEFAULT