MAPREDUCE服务 MRS-准备安全认证:安全认证代码

时间：2023-12-20 16:24:58

MAPREDUCE服务 MRS

安全认证代码

目前样例代码统一调用LoginUtil类进行安全认证。

在HDFS样例工程代码中，不同的样例工程，使用的认证代码不同，包括基本安全认证和带ZooKeeper认证。

基本安全认证：

com.huawei.bigdata.hdfs.examples包的HdfsExample类样例程序不需要访问HBase或ZooKeeper，所以使用基本的安全认证代码即可。示例代码如下：

...
    private static final String PATH_TO_HDFS_SITE_XML = HdfsExample.class.getClassLoader().getResource("hdfs-site.xml").getPath();
    private static final String PATH_TO_CORE_SITE_XML = HdfsExample.class.getClassLoader().getResource("core-site.xml").getPath();
    private static final String PRNCIPAL_NAME = "hdfsDeveloper";
    private static final String PATH_TO_KEYTAB = HdfsExample.class.getClassLoader().getResource("user.keytab").getPath();
    private static final String PATH_TO_KRB5_CONF = HdfsExample.class.getClassLoader().getResource("krb5.conf").getPath();
    private static Configuration conf = null;
    }
...
    private static void authentication() throws IOException {
        // security mode
        if ("kerberos".equalsIgnoreCase(conf.get("hadoop.security.authentication"))) {
            System.setProperty("java.security.krb5.conf", PATH_TO_KRB5_CONF);
            LoginUtil.login(PRNCIPAL_NAME, PATH_TO_KEYTAB, PATH_TO_KRB5_CONF, conf);
        }
    }

带ZooKeeper认证：

com.huawei.bigdata.hdfs.examples包的“ColocationExample”类样例程序不仅需要基础安全认证，还需要添加ZooKeeper服务端Principal才能完成安全认证。示例代码如下：

...
    private static final String ZOOKEEPER_SERVER_PRINCIPAL_KEY = "zookeeper.server.principal";
    private static final String PRINCIPAL = "username.client.kerberos.principal";
    private static final String KEYTAB = "username.client.keytab.file";
    private static final String PRNCIPAL_NAME = "hdfsDeveloper";
    private static final String LOGIN_CONTEXT_NAME = "Client";
    private static final String PATH_TO_KEYTAB = System.getProperty("user.dir") + File.separator + "conf" + File.separator + "user.keytab";
    private static final String PATH_TO_KRB5_CONF = ColocationExample.class.getClassLoader().getResource("krb5.conf") .getPath();
    private static String zookeeperDefaultServerPrincipal = null;
    private static Configuration conf = new Configuration();
    private static DFSColocationAdmin dfsAdmin;
    private static DFSColocationClient dfs;
    private static void init() throws IOException {
        LoginUtil.login(PRNCIPAL_NAME, PATH_TO_KEYTAB, PATH_TO_KRB5_CONF, conf);
        LoginUtil.setJaasConf(LOGIN_CONTEXT_NAME, PRNCIPAL_NAME, PATH_TO_KEYTAB);
        zookeeperDefaultServerPrincipal = "zookeeper/hadoop." + KerberosUtil.getKrb5DomainRealm().toLowerCase();
        LoginUtil.setZookeeperServerPrincipal(ZOOKEEPER_SERVER_PRINCIPAL_KEY, zookeeperDefaultServerPrincipal);
    }	
...

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