[jira] [Commented] (HDFS-3733) audit logging must cover WebHdfs access

["Andy Isaacson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-3733?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13423623#comment-13423623 ] 

Andy Isaacson commented on HDFS-3733:
-------------------------------------

Additionally, since a denied OPEN does not hit the DN, only allowed OPEN requests generate audit log entries.
                
> audit logging must cover WebHdfs access
> ---------------------------------------
>
>                 Key: HDFS-3733
>                 URL: https://issues.apache.org/jira/browse/HDFS-3733
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: webhdfs
>    Affects Versions: 2.0.0-alpha
>            Reporter: Andy Isaacson
>            Assignee: Andy Isaacson
>
> Access via WebHdfs does not result in audit log entries.  It should.
> {noformat}
> % curl "http://nn1:50070/webhdfs/v1/user/adi/hello.txt?op=GETFILESTATUS"
> {"FileStatus":{"accessTime":1343351432395,"blockSize":134217728,"group":"supergroup","length":12,"modificationTime":1342808158399,"owner":"adi","pathSuffix":"","permission":"644","replication":1,"type":"FILE"}}
> {noformat}
> and observe that no audit log entry is generated.
> Interestingly, OPEN requests do not generate audit log entries when the NN generates the redirect, but do generate audit log entries when the second phase against the DN is executed.
> {noformat}
> % curl -v 'http://nn1:50070/webhdfs/v1/user/adi/hello.txt?op=OPEN'
> ...
> < HTTP/1.1 307 TEMPORARY_REDIRECT
> < Location: http://dn01:50075/webhdfs/v1/user/adi/hello.txt?op=OPEN&namenoderpcaddress=nn1:8020&offset=0
> ...
> % curl -v 'http://dn01:50075/webhdfs/v1/user/adi/hello.txt?op=OPEN&namenoderpcaddress=nn1:8020'
> ...
> < HTTP/1.1 200 OK
> < Content-Type: application/octet-stream
> < Content-Length: 12
> < Server: Jetty(6.1.26.cloudera.1)
> < 
> hello world
> {noformat}
> This happens because {{DatanodeWebHdfsMethods#get}} uses {{DFSClient#open}} thereby triggering the existing {{logAuditEvent}} code.

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