Greg Senia created HADOOP-13988:
-----------------------------------
Summary: KMSClientProvider does not work with WebHDFS and Apache
Knox w/ProxyUser
Key: HADOOP-13988
URL: https://issues.apache.org/jira/browse/HADOOP-13988
Project: Hadoop Common
Issue Type: Bug
Components: common, kms
Affects Versions: 2.7.3
Environment: HDP 2.5.3.0
WebHDFSUser --> Knox --> HA NameNodes(WebHDFS) --> DataNodes
Reporter: Greg Senia
After upgrading to HDP 2.5.3.0 noticed that all of the KMSClientProvider issues
have not been resolved. We put a test build together and applied HADOOP-13558
and HADOOP-13749 these two fixes did still not solve the issue with requests
coming from WebHDFS through to Knox to a TDE zone.
So we added some debug to our build and determined effectively what is
happening here is a double proxy situation which does not seem to work. So we
propose the following fix in getActualUgi Method:
}
// Use current user by default
UserGroupInformation actualUgi = currentUgi;
if (currentUgi.getRealUser() != null) {
// Use real user for proxy user
if (LOG.isDebugEnabled()) {
LOG.debug("using RealUser for proxyUser);
}
actualUgi = currentUgi.getRealUser();
if (getDoAsUser() != null) {
if (LOG.isDebugEnabled()) {
LOG.debug("doAsUser exists");
LOG.debug("currentUGI realUser shortName: {}",
currentUgi.getRealUser().getShortUserName());
LOG.debug("processUGI loginUser shortName: {}",
UserGroupInformation.getLoginUser().getShortUserName());
}
if (currentUgi.getRealUser().getShortUserName() !=
UserGroupInformation.getLoginUser().getShortUserName()) {
if (LOG.isDebugEnabled()) {
LOG.debug("currentUGI.realUser does not match
UGI.processUser);
}
actualUgi = UserGroupInformation.getLoginUser();
if (LOG.isDebugEnabled()) {
LOG.debug("LoginUser for Proxy: {}",
actualUgi.getLoginUser());
}
}
}
} else if (!currentUgiContainsKmsDt() &&
!currentUgi.hasKerberosCredentials()) {
// Use login user for user that does not have either
// Kerberos credential or KMS delegation token for KMS operations
if (LOG.isDebugEnabled()) {
LOG.debug("using loginUser no KMS Delegation Token no Kerberos
Credentials");
}
actualUgi = currentUgi.getLoginUser();
}
return actualUgi;
}
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