Vihang Karajgaonkar created HIVE-14822:

             Summary: Add support for credential provider for jobs launched 
from Hiveserver2
                 Key: HIVE-14822
             Project: Hive
          Issue Type: Bug
          Components: HiveServer2
            Reporter: Vihang Karajgaonkar
            Assignee: Vihang Karajgaonkar

When using encrypted passwords via the Hadoop Credential Provider, HiveServer2 
currently does not correctly forward enough information to the job 
configuration for jobs to read those secrets. If your job needs to access any 
secrets, like S3 credentials, then there's no convenient and secure way to 
configure this today.

You could specify the decryption key in files like mapred-site.xml that 
HiveServer2 uses, but this would place the encryption password on local disk in 
plaintext, which can be a security concern.

To solve this problem, HiveServer2 should modify job configuration to include 
the environment variable settings needed to decrypt the passwords. 
Specifically, it will need to modify:
* For MR2 jobs:
** mapreduce.admin.user.env
* For Spark jobs:
** spark.yarn.appMasterEnv.HADOOP_CREDSTORE_PASSWORD

HiveServer2 can get the decryption password from its own environment, the same 
way it does for its own credential provider store today.

Additionally, it can be desirable for HiveServer2 to have a separate encrypted 
password file than what is used by the job. HiveServer2 may have secrets that 
the job should not have, such as the metastore database password or the 
password to decrypt its private SSL certificate. It is also best practices to 
have separate passwords on separate files. To facilitate this, Hive will also 
* A configuration for a path to a credential store to use for jobs. This should 
already be uploaded in HDFS. (hive.server2.job.keystore.location or a better 
name) If this is not specified, then HS2 will simply use the value of
* An environment variable for the password to decrypt the credential store 
(HIVE_JOB_KEYSTORE_PASSWORD or better). If this is not specified, then HS2 will 
simply use the standard environment variable for decrypting the Hadoop 
Credential Provider.

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