THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Also, set the WebHCat configuration variables templeton.kerberos.principal and templeton.kerberos.keytab.
Proxy User Support
Proxy User Support in WebHCat allows the caller of WebHCat to instruct WebHCat to run commands on the Hadoop cluster as a particular user.
The canonical example is Joe using Hue to submit a MapReduce job through WebHCat. For the following description, assume Joe has the Unix name 'joe', Hue is 'hue' and WebHCat is 'hcat'. If Hue specifies 'doAs=joe' when calling WebHCat, WebHCat submits the MR job as 'joe' so that the Hadoop cluster can perform securitiy checks with respect to 'joe'. If the doAs value is not specified, the MR job will be submitted as user 'hue'.
To set up Proxy User Support, make the following edits in configuration files.
In hive-site.xml, set:
Variable | Value |
|---|---|
hive.security.metastore.authorization.manager | org.apache.hadoop.hive.ql.security.authorization.StorageBasedAuthorizationProvider |
hive.security.metastore.authenticator.manager | org.apache.hadoop.hive.ql.security.HadoopDefaultMetastoreAuthenticator |
hive.metastore.pre.event.listeners | org.apache.hadoop.hive.ql.security.authorization.AuthorizationPreEventListener |
hive.metastore.execute.setugi | true |
In webhcat-site.xml, set:
Variable | Value |
|---|---|
webhcat.proxyuser.hue.groups | A comma-separated list of the Unix groups whose users may be impersonated by 'hue'. |
webhcat.proxyuser.hue.hosts | A comma-separated list of the hosts which are allowed to submit requests by 'hue'. In the canonical example, this would be the servers running Hue. |
In core-site.xml, make sure the following are also set:
Variable | Value |
|---|---|
hadoop.proxyuser.hcat.group | A comma-separated list of the Unix groups whose users may be impersonated by 'hcat'. |
hadoop.proxyuser.hcat.hosts | A comma-separated list of the hosts which are allowed to submit requests by 'hcat'. |
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Previous: Using WebHCat Hive installation: Installing Hive General: WebHCat Manual – HCatalog Manual – Hive Wiki Home – Hive Project Site |