Examples with MiniKdc org.apache.hadoop.minikdc.MiniKdc used on opensource projects

Example 41 with MiniKdc

use of org.apache.hadoop.minikdc.MiniKdc in project hbase by apache.

the class HBaseTestingUtility method setupMiniKdc.

/**
 * Sets up {@link MiniKdc} for testing security.
 * Uses {@link HBaseKerberosUtils} to set the given keytab file as
 * {@link HBaseKerberosUtils#KRB_KEYTAB_FILE}.
 * FYI, there is also the easier-to-use kerby KDC server and utility for using it,
 * {@link org.apache.hadoop.hbase.util.SimpleKdcServerUtil}. The kerby KDC server is preferred;
 * less baggage. It came in in HBASE-5291.
 */
public MiniKdc setupMiniKdc(File keytabFile) throws Exception {
    Properties conf = MiniKdc.createConf();
    conf.put(MiniKdc.DEBUG, true);
    MiniKdc kdc = null;
    File dir = null;
    // There is time lag between selecting a port and trying to bind with it. It's possible that
    // another service captures the port in between which'll result in BindException.
    boolean bindException;
    int numTries = 0;
    do {
        try {
            bindException = false;
            dir = new File(getDataTestDir("kdc").toUri().getPath());
            kdc = new MiniKdc(conf, dir);
            kdc.start();
        } catch (BindException e) {
            // clean directory
            FileUtils.deleteDirectory(dir);
            numTries++;
            if (numTries == 3) {
                LOG.error("Failed setting up MiniKDC. Tried " + numTries + " times.");
                throw e;
            }
            LOG.error("BindException encountered when setting up MiniKdc. Trying again.");
            bindException = true;
        }
    } while (bindException);
    HBaseKerberosUtils.setKeytabFileForTesting(keytabFile.getAbsolutePath());
    return kdc;
}