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Kerberos support #1025 #1030

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2a653d8
Kerberos properties and authentication support.
blueshift-brasil Mar 27, 2018
c2ecc75
Default value to kerberos properties.
blueshift-brasil Mar 27, 2018
6c75835
Update versions from 1.2.0 to 1.3.0 and update propery keys from ".ke…
blueshift-brasil Mar 28, 2018
580e582
Rename method "loginWithKerberos" to "hdfsLoginWithKerberos".
blueshift-brasil Mar 28, 2018
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16 changes: 16 additions & 0 deletions modules/api/src/main/java/org/apache/fluo/api/config/FluoConfiguration.java
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Expand Up @@ -48,6 +48,22 @@ public class FluoConfiguration extends SimpleConfiguration {

// Client properties
private static final String CLIENT_PREFIX = FLUO_PREFIX + ".client";

/**
* @since 1.2.0
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This should be 1.3.0

*/
public static final String CLIENT_KERBEROS = CLIENT_PREFIX + ".kerberos";
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Since this is only used for HDFS and not for zookeeper or accumulo, I think the prop name should be CLIENT_HDFS_KERBEROS = CLIENT_PREFIX + ".hdfs.kerberos"


/**
* @since 1.2.0
*/
public static final String CLIENT_KERBEROS_REALM = CLIENT_PREFIX + ".kerberos.realm";

/**
* @since 1.2.0
*/
public static final String CLIENT_KERBEROS_KEYTAB = CLIENT_PREFIX + ".kerberos.keytab";

/**
* @deprecated since 1.2.0 replaced by fluo.connection.application.name
*/
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31 changes: 31 additions & 0 deletions modules/core/src/main/java/org/apache/fluo/core/client/FluoAdminImpl.java
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Expand Up @@ -59,6 +59,7 @@
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.zookeeper.KeeperException;
import org.apache.zookeeper.KeeperException.NodeExistsException;
import org.slf4j.Logger;
Expand All @@ -76,6 +77,28 @@ public class FluoAdminImpl implements FluoAdmin {

private final String appRootDir;

/**
* Kerberos autentication method.
*
* @param realm Realm to be used in authentication.
* @param keytab Keytab path.
* @since 1.2.0
*/
public void loginWithKerberos(final String realm, final String keytab) {
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As far as I can tell, this only enables authentication to HDFS using HDFS client-side authentication features. The name should indicate hdfsLoginWithKerberos or some other indication. At the very least, the Javadoc should indicate that this is HDFS authentication.

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As we notice, just the jar copy process demanded kerberos authentication. All other components were able to retrieve the tokens from environment. But I agree with you. Fluo should work using the environment authentication.

I'll try other approaches. For while if someone want to use Fluo on kerberos this could help.

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Oh, interesting. I'm surprised other components worked from the environment, but this did not. I wonder why. Did you try fluo-yarn? Also, do you know if this change allows it to work with Accumulo with Kerberos tokens? Or did you only try Accumulo using regular PasswordTokens?

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Another possible way to fix this would be to ensure we use hadoop config from the classpath and document that.

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Yes! Our Accumulo is kerberized too. We have no problem with. We didn’t tried fluo-yarn yet on this environment. We can try.


try {
Configuration conf = new Configuration();
conf.set("hadoop.security.authentication", "kerberos");
conf.set("hadoop.security.authorization", "true");
UserGroupInformation.setConfiguration(conf);
UserGroupInformation.loginUserFromKeytab(realm, keytab);

logger.info("Connected with REALM: '{}'.", realm);
} catch (Exception e) {
throw new RuntimeException(e);
}
}

public FluoAdminImpl(FluoConfiguration config) {
this.config = config;

Expand Down Expand Up @@ -373,6 +396,14 @@ public static String copyDirToDfs(String dfsRoot, String appName, String srcDir,
}

private String copyJarsToDfs(String jars, String destDir) {

if (config.getClientConfiguration().getBoolean(FluoConfiguration.CLIENT_KERBEROS, false)) {
this.loginWithKerberos(
config.getClientConfiguration().getString(FluoConfiguration.CLIENT_KERBEROS_REALM, ""),
config.getClientConfiguration().getString(FluoConfiguration.CLIENT_KERBEROS_KEYTAB, ""));
}


String dfsAppRoot = config.getDfsRoot() + "/" + config.getApplicationName();
String dfsDestDir = dfsAppRoot + "/" + destDir;

Expand Down