Class: Flare::Tools::Cli::Slave

Inherits:
SubCommand show all
Includes:
IndexServerConfig, Flare::Tools::Common, Util::Constant, Util::Conversion
Defined in:
lib/flare/tools/cli/slave.rb

Constant Summary collapse

DefaultRetry = 
10

Constants included from IndexServerConfig

IndexServerConfig::Entity, IndexServerConfig::FLARE_INDEX_SERVER, IndexServerConfig::FLARE_INDEX_SERVERS

Constants included from Util::Constant

Util::Constant::DefalutBwlimit, Util::Constant::DefaultIndexServerName, Util::Constant::DefaultIndexServerPort, Util::Constant::DefaultNodePort, Util::Constant::DefaultTimeout, Util::Constant::STATUS_NG, Util::Constant::STATUS_OK

Constants included from Flare::Tools::Common

Flare::Tools::Common::NodeListFormat, Flare::Tools::Common::NodeListHeader

Constants inherited from SubCommand

Flare::Tools::Cli::SubCommand::S_NG, Flare::Tools::Cli::SubCommand::S_OK

Constants included from Util::Interruption

Util::Interruption::InterruptionTargets

Instance Attribute Summary

Attributes included from Option

#optp

Instance Method Summary collapse

Methods included from Util::Logging

#debug, #error, #fatal, #info, logger, #puts, set_logger, #trace, #warn

Methods included from Flare::Tools::Common

#address_of_hostname, #fetch_cluster, #hostname_of_address, #nodekey_of, #string_of_nodelist, #user_confirmed, #wait_for_master_construction, #wait_for_servers, #wait_for_slave_construction

Methods included from Util::Conversion

#short_desc_of_second

Methods inherited from SubCommand

desc, #execute_subcommand, myname, #myname, to_s, to_sym, usage

Methods included from Util::Interruption

included, #initialize_interruption, #interrupt, #interrupt_, interrupt_all, #interrupted?, #interruptible, #interruptible?

Methods included from Option

#option_init, #parse_options, #set_option_dry_run, #set_option_force, #set_option_global, #set_option_index_server

Constructor Details

#initialize ⇒ Slave

Returns a new instance of Slave.



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# File 'lib/flare/tools/cli/slave.rb', line 43

def initialize
  super
  @force = false
  @retry = DefaultRetry
  @without_clean = false
end

Instance Method Details

#execute(config, args) ⇒ Object 



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# File 'lib/flare/tools/cli/slave.rb', line 50

def execute(config, args)
  parse_index_server(config, args)
  return S_NG if args.empty?

  hosts = args.map do |arg|
    hostname, port, balance, partition, rest = arg.split(':', 5)
    if rest != nil || balance.nil?
      error "invalid argument '#{arg}'. it must be hostname:port:balance:partition."
      return S_NG
    end
    [hostname, port, balance.to_i, partition.to_i]
  end

  Flare::Tools::IndexServer.open(config[:index_server_hostname], config[:index_server_port], @timeout) do |s|
    cluster = fetch_cluster(s)

    hosts.each do |hostname,port,balance,partition|
      nodekey = nodekey_of hostname, port

      unless cluster.has_nodekey? nodekey
        error "invalid 'hostname:port' pair: #{nodekey}"
        return S_NG
      end

      node = cluster.node_stat(nodekey)

      if node['role'] != 'proxy'
        puts "#{nodekey} is not a proxy."
        next
      end

      exec = @force
      unless exec
        clean_notice_base = "\nitems stored in the node will be cleaned up (exec flush_all) before constructing it"
        clean_notice = @without_clean ? clean_notice_base : ''
        STDERR.print "making node slave (node=#{nodekey}, role=#{node['role']} -> slave)#{clean_notice} (y/n): "
        interruptible do
          exec = true if gets.chomp.upcase == "Y"
        end
      end
      if exec && !@dry_run
        unless @without_clean
          resp = false
          Flare::Tools::Node.open(hostname, port, @timeout) do |n|
            resp = n.flush_all
          end
          unless resp
            STDERR.print "executing flush_all failed."
            return S_NG
          end
          puts "executed flush_all command before constructing the slave node."
        end

        nretry = 0
        resp = false
        while resp == false && nretry < @retry
          resp = s.set_role(hostname, port, 'slave', 0, partition)
          if resp
            puts "started constructing slave node..."
          else
            nretry += 1
            puts "waiting #{nretry} sec..."
            sleep nretry
            puts "retrying..."
          end
        end
        if resp
          wait_for_slave_construction(s, nodekey, @timeout)
          if balance > 0
            unless @force
              STDERR.print "changing node's balance (node=#{nodekey}, balance=0 -> #{balance}) (y/n): "
              exec = interruptible {(gets.chomp.upcase == "Y")}
            end
            if exec
              s.set_role(hostname, port, 'slave', balance, partition)
            end
          end
        else
          error "failed to change the state."
          return S_NG
        end
      end
    end
    STDOUT.puts string_of_nodelist(s.stats_nodes, hosts.map {|x| x[0..1].join(':')})
  end

  return S_OK
end

#setup ⇒ Object 



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# File 'lib/flare/tools/cli/slave.rb', line 31

def setup
  super
  set_option_index_server
  set_option_dry_run
  set_option_force
  @optp.on('--retry=COUNT', "specify retry count(default:#{@retry})") {|v| @retry = v.to_i}
  @optp.on('--without-clean', "don't clear datastore before construction") { @without_clean = true }
  @optp.on('--clean', '[obsolete] now slave command clear datastore before construction by default.') do
    # do nothing
  end
end