Java Client For Secure Hbase

Hi I am trying to write a java client for secure hbase. I want to do kinit also from code itself for that i`m using the usergroup information class. Can anyone point out where am I going wrong here?

this is the main method that Im trying to connect o hbase from.

I have to add the configuration in the CONfiguration object rather than using the xml, because the client can be located anywhere.

Please see the code below:

    public static void main(String [] args) {
    try {
        System.setProperty(CommonConstants.KRB_REALM, ConfigUtil.getProperty(CommonConstants.HADOOP_CONF, "krb.realm"));
        System.setProperty(CommonConstants.KRB_KDC, ConfigUtil.getProperty(CommonConstants.HADOOP_CONF,"krb.kdc"));
        System.setProperty(CommonConstants.KRB_DEBUG, "true");

        final Configuration config = HBaseConfiguration.create();

        config.set(CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTHENTICATION, AUTH_KRB);
        config.set(CommonConfigurationKeysPublic.HADOOP_SECURITY_AUTHORIZATION, AUTHORIZATION);
        config.set(CommonConfigurationKeysPublic.FS_AUTOMATIC_CLOSE_KEY, AUTO_CLOSE);
        config.set(CommonConfigurationKeysPublic.FS_DEFAULT_NAME_KEY, defaultFS);
        config.set("hbase.zookeeper.quorum", ConfigUtil.getProperty(CommonConstants.HBASE_CONF, "hbase.host"));
        config.set("hbase.zookeeper.property.clientPort", ConfigUtil.getProperty(CommonConstants.HBASE_CONF, "hbase.port"));
        config.set("hbase.client.retries.number", Integer.toString(0));
        config.set("zookeeper.session.timeout", Integer.toString(6000));
        config.set("zookeeper.recovery.retry", Integer.toString(0));
        config.set("hbase.master", "gauravt-namenode.pbi.global.pvt:60000");
        config.set("zookeeper.znode.parent", "/hbase-secure");
        config.set("hbase.rpc.engine", "org.apache.hadoop.hbase.ipc.SecureRpcEngine");
        config.set("hbase.security.authentication", AUTH_KRB);
        config.set("hbase.security.authorization", AUTHORIZATION);
        config.set("hbase.master.kerberos.principal", "hbase/gauravt-namenode.pbi.global.pvt@pbi.global.pvt");
        config.set("hbase.master.keytab.file", "D:/var/lib/bda/secure/keytabs/hbase.service.keytab");
        config.set("hbase.regionserver.kerberos.principal", "hbase/gauravt-datanode2.pbi.global.pvt@pbi.global.pvt");
        config.set("hbase.regionserver.keytab.file", "D:/var/lib/bda/secure/keytabs/hbase.service.keytab");

        UserGroupInformation.setConfiguration(config);
        UserGroupInformation userGroupInformation = UserGroupInformation.loginUserFromKeytabAndReturnUGI("hbase/gauravt-datanode2.pbi.global.pvt@pbi.global.pvt", "D:/var/lib/bda/secure/keytabs/hbase.service.keytab");
        UserGroupInformation.setLoginUser(userGroupInformation);

        User user = User.create(userGroupInformation);

        user.runAs(new PrivilegedExceptionAction<Object>() {

            @Override
            public Object run() throws Exception {
                HBaseAdmin admins = new HBaseAdmin(config);

                if(admins.isTableAvailable("ambarismoketest")) {
                    System.out.println("Table is available");
                };

                HConnection connection = HConnectionManager.createConnection(config);

                HTableInterface table = connection.getTable("ambarismoketest");



                admins.close();
                System.out.println(table.get(new Get(null)));
                return table.get(new Get(null));
            }
        });
        System.out.println(UserGroupInformation.getLoginUser().getUserName());


    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }

I`m getting the following exception:

    Caused by: org.apache.hadoop.ipc.RemoteException(javax.security.sasl.SaslException): GSS initiate failed
at org.apache.hadoop.hbase.security.HBaseSaslRpcClient.readStatus(HBaseSaslRpcClient.java:110)
at org.apache.hadoop.hbase.security.HBaseSaslRpcClient.saslConnect(HBaseSaslRpcClient.java:146)
at org.apache.hadoop.hbase.ipc.RpcClient$Connection.setupSaslConnection(RpcClient.java:762)
at org.apache.hadoop.hbase.ipc.RpcClient$Connection.access$600(RpcClient.java:354)
at org.apache.hadoop.hbase.ipc.RpcClient$Connection$2.run(RpcClient.java:883)
at org.apache.hadoop.hbase.ipc.RpcClient$Connection$2.run(RpcClient.java:880)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:396)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)
at org.apache.hadoop.hbase.ipc.RpcClient$Connection.setupIOstreams(RpcClient.java:880)
... 33 more

Any pointers would be helpful.

Answer

The above works nicely, but I’ve seen a lot of folks struggle with setting all of the right properties in the Configuration object. There’s no de-facto list that I’ve found of exactly what you need and don’t need and it is painfully dependent on your cluster configuration.

The surefire way is to have a copy of your HBase configurations in your classpath, since your client can be anywhere as you mentioned. Then you can add the resources to your object without having to specify all properties.

Configuration conf = HBaseConfiguration.create();
conf.addResource("core-site.xml");
conf.addResource("hbase-site.xml");
conf.addResource("hdfs-site.xml");

Here were some sources to back this approach: IBM, Scalding (Scala)

Also note that this approach doesn’t limit you to actually use the internal Zookeeper principal and keytab, i.e. you can create keytabs for applications or Active Directory users and leave the internally generated keytabs for the daemons to authenticate amongst themselves.

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Answer