Class: Flare::Tools::Cli::Reconstruct

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

Constant Summary

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

SubCommand::S_NG, 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 ⇒ Reconstruct

Returns a new instance of Reconstruct.



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# File 'lib/flare/tools/cli/reconstruct.rb', line 42

def initialize
  super
  @force = false
  @unsafe = false
  @retry = 10
  @all = false
end

Instance Method Details

#execute(config, args) ⇒ Object 



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

def execute(config, args)
  parse_index_server(config, args)

  if @all
    unless args.empty?
      puts "don't specify any nodes with --all option."
      return S_NG
    else
      Flare::Tools::IndexServer.open(config[:index_server_hostname], config[:index_server_port], @timeout) do |s|
        cluster = Flare::Tools::Cluster.new(s.host, s.port, s.stats_nodes)
        args = cluster.master_and_slave_nodekeys
      end
    end
  else
    return S_NG if args.size == 0
  end

  hosts = args.map {|x| x.to_s.split(':')}
  hosts.each do |x|
    if x.size != 2
      puts "invalid argument '#{x.join(':')}'. it must be hostname:port."
      return S_NG
    end
  end

  status = S_OK

  Flare::Tools::IndexServer.open(config[:index_server_hostname], config[:index_server_port], @timeout) do |s|
    puts string_of_nodelist(s.stats_nodes, hosts.map {|x| nodekey_of(x[0], x[1])})

    hosts.each do |hostname,port|
      nodekey = nodekey_of hostname, port
      cluster = Flare::Tools::Cluster.new(s.host, s.port, s.stats_nodes)

      unless node = cluster.node_stat(nodekey)
        puts "#{nodekey} is not found in this cluster."
        return S_NG
      end
      unless cluster.reconstructable? nodekey
        puts "#{nodekey} is not reconstructable."
        status = S_NG
        next
      end
      is_safe = cluster.safely_reconstructable? nodekey
      if !@unsafe && !is_safe
        puts "The partition needs one more slave to reconstruct #{nodekey} safely."
        status = S_NG
        next
      end

      exec = @force
      unless exec
        puts "you are trying to reconstruct #{nodekey} without redanduncy." unless is_safe
        input = nil
        while input.nil?
          STDERR.print "reconstructing node (node=#{nodekey}, role=#{node['role']}) (y/n/a/q/h:help): "
          input = interruptible do
            gets.chomp.upcase
          end
          case input
          when "A"
            @force = true
            exec = true
          when "N"
          when "Q"
            return S_OK
          when "Y"
            exec = true
          else
            puts "y: execute, n: skip, a: execute all the left nodes, q: quit, h: help"
            input = nil
          end
        end
      end
      if exec && !@dry_run
        puts "turning down..."
        s.set_state(hostname, port, 'down')

        puts "waiting for node to be active again..."
        sleep 3

        Flare::Tools::Node.open(hostname, port, @timeout) do |n|
          n.flush_all
        end

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

    puts string_of_nodelist(s.stats_nodes, hosts.map {|x| "#{x[0]}:#{x[1]}"})
  end # open

  status
end

#setup ⇒ Object 



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# File 'lib/flare/tools/cli/reconstruct.rb', line 29

def setup
  super
  set_option_index_server
  set_option_dry_run
  set_option_force
  @optp.on('--unsafe',         "reconstruct a node safely"              ) { @unsafe = true }
  @optp.on('--safe',           "[obsolete] now reconstruct a node safely by default") do
    # do nothing
  end
  @optp.on('--retry=COUNT',    "specify retry count (default:#{@retry})") {|v| @retry = v.to_i }
  @optp.on('--all',            "reconstruct all nodes"                  ) { @all = true }
end