Can Docker Compose build a ZooKeeper Discovery service for Swarm?

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First off, newbie here, so please be kind if this is a lame question! Also, please take pains to be thorough in any answers as I (and others) may not quite be ready for the leap to hyperspace!

Found this Five Server ZooKeeper Example . It uses Docker Compose to deploy a 5 host ensemble.

My questions are:

  1. Can that ZooKeeper instance subsequently be used as a Discovery Service in Swarm? If so, how would that be accomplished (assuming only the five nodes for the swarm)?
  2. Related to the first question - the Docker Documentation says that Compose and Swarm aim to have full integration… meaning you can point a Compose app at a Swarm Cluster. But how much of the Swarm Cluster can Compose compose? That is, is it possible to have Compose also build the swarm cluster it will subsequently use?
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ZooKeeper is an available backend for the “legacy Swarm” (https://github.com/docker/swarm) but as of 1.12.0 orchestration and discovery features are built in to a new Docker-native “swarm mode”. You should look into that, you may not need ZK at all.