Initialization: Set service discovery address equal to druid.host (without port if any)

client/src/main/java/com/metamx/druid/initialization/Initialization.java

@@ -278,6 +278,7 @@ public class Initialization
     final ServiceInstance serviceInstance =
         ServiceInstance.builder()
                        .name(config.getServiceName().replace('/', ':'))
+                       .address(addressFromHost(config.getHost()))
                        .port(config.getPort())
                        .build();
     final ServiceDiscovery serviceDiscovery =
@@ -361,6 +362,16 @@ public class Initialization
     return String.format("%s/%s", basePath, PROP_SUBPATH);
   }
 
+  public static String addressFromHost(final String host)
+  {
+    final int colon = host.indexOf(':');
+    if (colon < 0) {
+      return host;
+    } else {
+      return host.substring(0, colon);
+    }
+  }
+
   /**
    * Validate and Resolve Properties.
    * Resolve zpaths with props like druid.zk.paths.*Path using druid.zk.paths.base value.

client/src/main/java/com/metamx/druid/initialization/ServiceDiscoveryConfig.java

@@ -28,6 +28,9 @@ public abstract class ServiceDiscoveryConfig extends CuratorConfig
   @Config("druid.service")
   public abstract String getServiceName();
 
+  @Config("druid.host")
+  public abstract String getHost();
+
   @Config("druid.port")
   public abstract int getPort();