Class: Esteem::Reindex

Inherits:
Object
  • Object
show all
Defined in:
lib/esteem/reindex.rb

Overview

Cribbed from geronime’s “es-reindex” script: github.com/geronime/es-reindex

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(source:, destination:, frame:, update:) ⇒ Reindex

Perform a new reindex job. Success or failure will be reported by the read-only “success” attribute.

Parameters:

  • [String] (Hash) —

    a customizable set of options

  • [Integer] (Hash) —

    a customizable set of options

  • [Boolean] (Hash) —

    a customizable set of options



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# File 'lib/esteem/reindex.rb', line 21

def initialize source:, destination:, frame:, update:
  src, dst = source, destination
  @success = false

  type, src = src.reverse.split('/', 2).map(&:reverse)

  surl, durl, sidx, didx = '', '', '', ''
  [[src, surl, sidx], [dst, durl, didx]].each{|param, url, idx|
    if param =~ %r{^(.*)/(.*?)$}
      url.replace $1
      idx.replace $2
    else
      url.replace 'http://127.0.0.1:9200'
      idx.replace param
    end
  }

  puts "Copying '%s/%s/%s' to '%s/%s'" % [ surl, sidx, type, durl, didx ]

  scount = retried_request :get, "#{surl}/#{sidx}/#{type}/_count?q=*"
  scount = Oj.load(scount)['count'].to_i

  puts "%d documents" % scount

  if scount == 0
    puts "Hey, this index is empty! Skipping..."
    @success = true
    return
  end

  t, done = Time.now, 0
  shards = retried_request :get, "#{surl}/#{sidx}/_count?q=*"
  shards = Oj.load(shards)['_shards']['total'].to_i
  scan = retried_request(:get, "#{surl}/#{sidx}/#{type}/_search?search_type=scan&scroll=10m&size=#{frame / shards}")
  scan = Oj.load scan
  scroll_id = scan['_scroll_id']
  total = scan['hits']['total']
  printf "    %u/%u (%.1f%%) done.\r", done, total, 0

  bulk_op = update ? "index" : "create"

  loop do
    data = retried_request(:get, "#{surl}/_search/scroll?scroll=10m&scroll_id=#{scroll_id}")
    data = Oj.load data
    break if data['hits']['hits'].empty?

    scroll_id = data['_scroll_id']
    bulk = ''

    data['hits']['hits'].each do |doc|
      bulk << %Q({"#{bulk_op}": {"_index" : "#{didx}", "_id" : "#{
          doc['_id']}", "_type" : "#{doc['_type']}"}}\n)
      bulk << Oj.dump(doc['_source']) + "\n"
      done += 1
    end

    unless bulk.empty?
      bulk << "\n" # empty line in the end required
      retried_request :post, "#{durl}/_bulk", bulk
    end

    eta = total * (Time.now - t) / done
    printf "    %u/%u (%.1f%%) done in %s, E.T.A.: %s.\r",
      done, total, 100.0 * done / total, tm_len(Time.now - t), t + eta
  end

  printf "#{' ' * 80}\r    %u/%u done in %s.\n",
    done, total, tm_len(Time.now - t)



  tries = 0
  dcount = -1

  puts "Waiting for documents to appear in index..."
  until total <= dcount
    dcount = retried_request :get, "#{durl}/#{didx}/#{type}/_count"
    dcount = Oj.load(dcount)['count'].to_i
    tries += 1

    if tries > 30
      puts "Too many tries!"
      @success = false
      return
    end

    sleep 15
  end

  if done != dcount
    puts "Incomplete done! %d != %d" % [ done, dcount ]
    @success = false
    return
  end

  @success = true
end

Instance Attribute Details

#success ⇒ Object (readonly)

Returns the value of attribute success.



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# File 'lib/esteem/reindex.rb', line 11

def success
  @success
end