## HBase Cluster Replication

Deploy HBase replication to point slave cluster.

    module.exports =  header: 'HBase Client Replication', handler: ({options}) ->

## Wait

Wait for the Master to be started.

      @call '@rybajs/metal/hbase/master/wait', once: true, options.wait_hbase_master

## Add Peer

Run the `add_peer` command to register each replicated cluster.

      for k, cluster of options.replicated_clusters
        peer_key = parseInt(k) + 1
        peer_value = "#{cluster.zookeeper_quorum}:#{cluster.zookeeper_port}:#{cluster.zookeeper_node}"
        if cluster.zookeeper_node != options.hbase_site['zookeeper.znode.parent']
          msg_err = "Slave Cluster must have same zookeeper hbase node: #{cluster.zookeeper_node} instead of #{options.hbase_site['zookeeper.znode.parent']}"
          throw new Error msg_err
        else
          @system.execute
            cmd: mkcmd.hbase @, """
            hbase shell -n 2>/dev/null <<-CMD
              add_peer '#{peer_key}', '#{peer_value}'
            CMD
            """
            unless_exec: mkcmd.hbase @, "hbase shell -n 2>/dev/null <<< \"list_peers\" | grep '#{peer_key} #{peer_value} ENABLED'"

## Dependencies

    mkcmd = require '../../lib/mkcmd'