/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hive.llap.security;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.common.UgiFactory;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.conf.HiveConf.ConfVars;
import org.apache.hadoop.hive.llap.LlapUtil;
import org.apache.hadoop.hive.shims.HadoopShims;
import org.apache.hadoop.hive.shims.ShimLoader;
import org.apache.hadoop.security.UserGroupInformation;
/** No Java application is complete until it has a FactoryFactory. */
public class LlapUgiFactoryFactory {
private static final HadoopShims SHIMS = ShimLoader.getHadoopShims();
private static class KerberosUgiFactory implements UgiFactory {
private final UserGroupInformation baseUgi;
public KerberosUgiFactory(String keytab, String principal) throws IOException {
baseUgi = LlapUtil.loginWithKerberos(principal, keytab);
}
@Override
public UserGroupInformation createUgi() throws IOException {
// Make sure the UGI is current.
baseUgi.checkTGTAndReloginFromKeytab();
// TODO: the only reason this is done this way is because we want unique Subject-s so that
// the FS.get gives different FS objects to different fragments.
// TODO: could we log in from ticket cache instead? no good method on UGI right now.
return SHIMS.cloneUgi(baseUgi);
}
}
private static class NoopUgiFactory implements UgiFactory {
@Override
public UserGroupInformation createUgi() throws IOException {
return null;
}
}
public static UgiFactory createFsUgiFactory(Configuration conf) throws IOException {
String fsKeytab = HiveConf.getVar(conf, ConfVars.LLAP_FS_KERBEROS_KEYTAB_FILE),
fsPrincipal = HiveConf.getVar(conf, ConfVars.LLAP_FS_KERBEROS_PRINCIPAL);
boolean hasFsKeytab = fsKeytab != null && !fsKeytab.isEmpty(),
hasFsPrincipal = fsPrincipal != null && !fsPrincipal.isEmpty();
if (hasFsKeytab != hasFsPrincipal) {
throw new IOException("Inconsistent FS keytab settings " + fsKeytab + "; " + fsPrincipal);
}
return hasFsKeytab ? new KerberosUgiFactory(fsKeytab, fsPrincipal) : new NoopUgiFactory();
}
}