high availability - Whats the best way to migrate a zookeeper ensemble of 3? -

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i have zk ensemble of 3 nodes.

i need move each different server.

whats best way achieve while achieving 0 downtime?

an approach temporary requires increasing ensemble size work too. achieving 0 downtime main goal.

have @ gist: https://gist.github.com/miketheman/6057930

  1. add 2 more nodes on new servers
  2. let them sync, add them existing configs
  3. restart followers
  4. kill remaining master , deploy 3. zk on new server
  5. kill 2 zk on wrong servers

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