Thanks Balaji for your reply. Is there a reason why Ranger does not call authorizer for superuser operations?
Even the audits are not captured via Ranger for *hdfs *users. By encrypting the data we can solve the issue of data access by admins partially, as hdfs user can apply brute force method to crack the encryption system and this activity is never logged in Ranger. Can we enable auditing for superusers? Thanks in advance! On Thu, Jun 4, 2015 at 12:28 PM, Balaji Ganesan <[email protected]> wrote: > Yes, best way to protect sensitive data from admins would be to use > encryption. For access control, HDFS does not call Ranger authorizer for > superuser operations. Consequently, there is no access control enforced by > Ranger nor there is Ranger audit. > > On Thu, Jun 4, 2015 at 6:17 AM, Suraj Nayak <[email protected]> wrote: > >> Thanks Loïc for the quick response! So, to protect PII information being >> accessed from admins encryption is the way ahead. Right? >> >> On Thu, Jun 4, 2015 at 5:55 AM, Chanel Loïc <[email protected]> >> wrote: >> >>> Hi Suraj Nayak, >>> >>> >>> >>> As Hadoop authorizations run the same way than Unix ones, *hdfs* is the >>> equivalent of super user in Linux. >>> >>> So basically yes *hdfs* can bypass any rule/policy set by Ranger as it >>> has all the rights on the cluster. >>> >>> >>> >>> Regards, >>> >>> >>> >>> >>> >>> Loïc >>> >>> >>> >>> >>> >>> *De :* Suraj Nayak [mailto:[email protected]] >>> *Envoyé :* jeudi 4 juin 2015 14:48 >>> *À :* [email protected] >>> *Objet :* hdfs user can bypass policy in ranger >>> >>> >>> >>> Hi Ranger Users, >>> >>> >>> >>> Am new to Ranger. What I tried was, I created a HDFS policy for a file >>> created by user say *hdusr. *The policy states only hdusr can access. >>> Ranger behaves perfectly well by denying access to this hdfs file resource >>> for all users other than *hdusr* except *hdfs* user. >>> >>> >>> >>> Does this mean that *hdfs *superuser can bypass the policy and open, >>> rename and delete a file which is protected by Ranger policy? >>> >>> >>> >>> Thanks in advance :) >>> >>> >>> >>> -- >>> >>> Thanks >>> >>> Suraj Nayak M >>> >>> ------------------------------ >>> >>> Ce message et les pièces jointes sont confidentiels et réservés à >>> l'usage exclusif de ses destinataires. Il peut également être protégé par >>> le secret professionnel. Si vous recevez ce message par erreur, merci d'en >>> avertir immédiatement l'expéditeur et de le détruire. L'intégrité du >>> message ne pouvant être assurée sur Internet, la responsabilité de >>> Worldline ne pourra être recherchée quant au contenu de ce message. Bien >>> que les meilleurs efforts soient faits pour maintenir cette transmission >>> exempte de tout virus, l'expéditeur ne donne aucune garantie à cet égard et >>> sa responsabilité ne saurait être recherchée pour tout dommage résultant >>> d'un virus transmis. >>> >>> This e-mail and the documents attached are confidential and intended >>> solely for the addressee; it may also be privileged. If you receive this >>> e-mail in error, please notify the sender immediately and destroy it. As >>> its integrity cannot be secured on the Internet, the Worldline liability >>> cannot be triggered for the message content. Although the sender endeavours >>> to maintain a computer virus-free network, the sender does not warrant that >>> this transmission is virus-free and will not be liable for any damages >>> resulting from any virus transmitted. >>> >> >> >> >> -- >> Thanks >> Suraj Nayak M >> > > -- Thanks Suraj Nayak M
