title: zookeeper cluster configuration on two servers
body: <p>I want to build a cluster using zookeeper, but I just get 2 servers(A,B). If I install two zookeepers(<code>z1</code>, <code>z2</code>) on server A, and one(<code>z3</code>) on server B. Can this cluster work?
  In fact, I have configured my servers like this. <code>z2</code> can start, but I can not check its status. And <code>z1</code> and <code>z3</code> are standalone mode. How to configure? Thanks.</p>