HBASE-27420 Allow non-loopback for zk standalone server in minizkcluster (#4819)

Signed-off-by: Andrew Purtell <[email protected]>
Signed-off-by: Viraj Jasani <[email protected]>
Co-authored-by: Sanjeet Malhotra <[email protected]>

Author: sanjeet006py

hbase-zookeeper/src/main/java/org/apache/hadoop/hbase/zookeeper/MiniZooKeeperCluster.java

@@ -237,7 +237,9 @@ public int startup(File baseDir, int numZooKeeperServers)
       while (true) {
         try {
           standaloneServerFactory = new NIOServerCnxnFactory();
-          standaloneServerFactory.configure(new InetSocketAddress(LOOPBACK_HOST, currentClientPort),
+          String bindAddr =
+            configuration.get("hbase.zookeeper.property.clientPortAddress", LOOPBACK_HOST);
+          standaloneServerFactory.configure(new InetSocketAddress(bindAddr, currentClientPort),
             configuration.getInt(HConstants.ZOOKEEPER_MAX_CLIENT_CNXNS,
               HConstants.DEFAULT_ZOOKEEPER_MAX_CLIENT_CNXNS));
         } catch (BindException e) {