Class: Flare::Tools::Cli::Master

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

Returns a new instance of Master.



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# File 'lib/flare/tools/cli/master.rb', line 38

def initialize
  super
  @force = false
  @retry = 10
  @activate = false
  @without_clean = false
end

Instance Method Details

#execute(config, args) ⇒ Object 



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# File 'lib/flare/tools/cli/master.rb', line 46

def execute(config, args)
  parse_index_server(config, args)
  status = S_OK

  return S_NG if args.empty?
  hosts = args.map {|x| x.to_s.split(':')}
  hosts.each do |x|
    if x.size != 4
      error "invalid argument '#{x.join(':')}'."
      return S_NG
    end
    if x[2].to_i <= 0
      error "invalid balance '#{x.join(':')}'."
      return S_NG
    end
    if nodekey_of(x[0..1]).nil?
      error "invalid nodekey '#{x.join(':')}'."
      return S_NG
    end
  end
  hosts = hosts.sort_by{|hostname,port,balance,partition| [partition]}

  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)

    hosts.each do |hostname,port,balance,partition|
      role = 'master'
      nodekey = nodekey_of hostname, port
      ipaddr = address_of_hostname(hostname)

      unless cluster.has_nodekey? nodekey
        error "unknown host: #{nodekey}"
        # return S_NG
      end

      node = cluster.node_stat(nodekey)

      partition = if partition == '' then node['partition'].to_i else partition.to_i end
      balance = if balance == '' then node['balance'] else balance.to_i end
      existing_master = cluster.master_in_partition(partition)

      exec = false
      if @force
        exec = true
      elsif node['role'] == role
        info "no need to change the role of #{ipaddr}:#{port}."
      elsif existing_master
        info "the partiton already has a master #{existing_master}."
      elsif node['role'] != 'proxy'
        puts "#{nodekey} is not a proxy."
      else
        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 the node master (node=#{ipaddr}:#{port}, role=#{node['role']} -> #{role})#{clean_notice} (y/n): "
        exec = interruptible {(gets.chomp.upcase == "Y")}
      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 master node."
        end

        nretry = 0
        resp = false
        while resp == false && nretry < @retry
          resp = s.set_role(hostname, port, role, balance, partition)
          if resp
            info "started constructing the master node..."
          else
            nretry += 1
            info "waiting #{nretry} sec..."
            sleep nretry
            info "retrying..."
          end
        end
        if resp
          state = wait_for_master_construction(s, nodekey, @timeout)
          if state == 'ready' && @activate
            unless @force
              node = s.stats_nodes[nodekey]
              STDERR.print "changing node's state (node=#{ipaddr}:#{port}, state=#{node['state']} -> active) (y/n): "
              exec = interruptible {
                (gets.chomp.upcase == "Y")
              }
            end
            if exec
              begin
                resp = s.set_state(hostname, port, 'active')
                unless resp
                  error "failed to activate #{nodekey}"
                  status = S_NG
                end
              rescue Timeout::Error
                error "failed to activate #{nodekey} (timeout)"
                status = S_NG
              end
            end
          end
        else
          error "failed to change the state."
          status = S_NG
        end
      end
    end

    break if status == S_NG
    STDOUT.puts string_of_nodelist(s.stats_nodes, hosts.map {|x| "#{x[0]}:#{x[1]}"})
  end

  status
end

#setup ⇒ Object 



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# File 'lib/flare/tools/cli/master.rb', line 28

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('--activate', "change node's state from ready to active") { @activate = true }
  @optp.on('--without-clean', "don't clear datastore before construction") { @without_clean = true }
end