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Linux Single Kerberos Realm with LDAP Groups Gateway Node Hadoop Cluster Corporate Network User(user) HadoopClient User'sTicketCache HadoopServices(eg hdfs) Service'sKeytab MITKDC LDAP Contains group info Contains user &service accounts 1kinit(hdfs):hdfs-tgt 2load():credentials 3kinit(guest):user-tgt 4prompt():credentials 5store(user-tgt) 6hadoop fs ls 7load():user-tgt 8tgsReq(user-tgt):user-hdfs-st 9ls[user-hdfs-st](dir):files 10verify(user-hdfs-st) 11groupLookup(user):groups
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