http://nexus.sonatype.org/oss-repository-hosting.html/vertx-parent/vertx-ext/vertx-ext-parent/vertx-zookeeper: Sonatype helps open source projects to set up Maven repositories on https://oss.sonatype.org/ (Eclipse) 
package example;

import io.vertx.core.Vertx;
import io.vertx.core.VertxOptions;
import io.vertx.core.json.JsonObject;
import io.vertx.core.spi.cluster.ClusterManager;
import io.vertx.spi.cluster.zookeeper.ZookeeperClusterManager;
import org.apache.curator.framework.CuratorFramework;


Created by stream.

/**
 * Created by stream.
 */
public class Examples {

  public void example1() {
    ClusterManager mgr = new ZookeeperClusterManager();
    VertxOptions options = new VertxOptions().setClusterManager(mgr);
    Vertx.clusteredVertx(options, res -> {
      if (res.succeeded()) {
        Vertx vertx = res.result();
      } else {
        // failed!
      }
    });
  }

  public void example2() {
    JsonObject zkConfig = new JsonObject();
    zkConfig.put("zookeeperHosts", "127.0.0.1");
    zkConfig.put("rootPath", "io.vertx");
    zkConfig.put("retry", new JsonObject()
        .put("initialSleepTime", 3000)
        .put("maxTimes", 3));


    ClusterManager mgr = new ZookeeperClusterManager(zkConfig);
    VertxOptions options = new VertxOptions().setClusterManager(mgr);

    Vertx.clusteredVertx(options, res -> {
      if (res.succeeded()) {
        Vertx vertx = res.result();
      } else {
        // failed!
      }
    });
  }

  public void example3(CuratorFramework curator) {
    ClusterManager mgr = new ZookeeperClusterManager(curator);
    VertxOptions options = new VertxOptions().setClusterManager(mgr);
    Vertx.clusteredVertx(options, res -> {
      if (res.succeeded()) {
        Vertx vertx = res.result();
      } else {
        // failed!
      }
    });
  }
}