Class: Dumper::Job

Inherits:
Object
  • Object
show all
Includes:
Utility::Log, POSIX::Spawn
Defined in:
lib/dumper/job.rb

Instance Method Summary collapse

Methods included from Utility::Log

#log, #log_last_error, #logger, #stdout_logger

Constructor Details

#initialize(agent, job) ⇒ Job

Returns a new instance of Job.



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# File 'lib/dumper/job.rb', line 9

def initialize(agent, job)
  @agent = agent
  @job = job
end

Instance Method Details

#abort_with(text, code = nil) ⇒ Object 



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# File 'lib/dumper/job.rb', line 145

def abort_with(text, code=nil)
  log text
  @database.try(:finalize)
  if code
    @agent.api_request('backup/fail', :params => { :backup_id => @backup_id, :code => code.to_s, :message => text })
  end
  log 'aborting...'
  exit!
end

#perform(server) ⇒ Object 



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# File 'lib/dumper/job.rb', line 24

def perform(server)
  # Find database
  server_type = server[:type].to_sym
  abort_with "invalid server type: #{server_type}" unless Dumper::Stack::DATABASES.keys.include?(server_type)
  return log "database not found: #{@database.inspect}" unless @database = @agent.stack.databases[server_type]

  # Prepare
  json = @agent.api_request('backup/prepare', :params => { :server_id => server[:id], :manual => server[:manual].to_s, :ext => @database.file_ext })
  abort_with('backup/prepare failed') unless json[:status] == 'ok'

  @backup_id = json[:backup][:id]

  # Dump
  start_at = Time.now
  @database.tmpdir = Dir.mktmpdir
  @database.filename = json[:backup][:filename]
  log 'starting backup...'
  log "tmpdir = #{@database.tmpdir}, filename = #{@database.filename}"
  log "command = #{@database.command}"

  begin
    pid, stdin, stdout, stderr = popen4(@database.command)
    stdin.close
    (out = stdout.read).empty? or log out, :debug
    (err = stderr.read).empty? or log err, :error
  rescue
    Process.kill(:INT, pid) rescue SystemCallError
    abort_with("dump error: #{$!}", :dump_error)
  ensure
    [stdin, stdout, stderr].each{|io| io.close unless io.closed? }
    Process.waitpid(pid)
  end

  dump_duration = Time.now - start_at
  @filesize = File.size(@database.dump_path)
  log "dump_duration = #{dump_duration}, filesize = #{@filesize}"
  if @filesize > @agent.max_filesize
    abort_with("max filesize exceeded: #{@filesize}", :too_large)
  end

  upload_to_s3(json)

  json = @agent.api_request('backup/commit', :params => { :backup_id => @backup_id, :dump_duration => dump_duration.to_i })
rescue
  log_last_error
ensure
  @database.finalize
end

#run_and_exit ⇒ Object 



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# File 'lib/dumper/job.rb', line 14

def run_and_exit
  @job[:servers].each do |server|
    perform(server)
  end
ensure
  log_last_error if $!
  log 'exiting...'
  exit!(true) # Do not use exit or abort to skip at_exit execution, or pid could get deleted on thin
end

#upload_by_aws_sdk(json) ⇒ Object 



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# File 'lib/dumper/job.rb', line 86

def upload_by_aws_sdk(json)
  log "uploading by aws-sdk v#{AWS::VERSION}"

  s3 = json[:s3_federation]
  aws = AWS::S3.new s3[:credentials].merge(region: s3[:region])

  retry_count = 0
  begin
    aws.buckets[s3[:bucket]].objects[s3[:key]].write(
      file: @database.dump_path,
      content_type: 'application/octet-stream',
      content_disposition: "attachment; filename=#{@database.filename}",
    )
  rescue # Errno::ECONNRESET, Errno::EPIPE, etc.
    raise if retry_count > 8
    retry_count += 1
    log "upload failed: #{$!} - retrying after #{2 ** retry_count}sec..."
    sleep 2 ** retry_count
    retry
  end
end

#upload_by_multipart_post(json) ⇒ Object 



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# File 'lib/dumper/job.rb', line 108

def upload_by_multipart_post(json)
  require 'net/http/post/multipart'
  log "uploading by multipart-post v#{Gem.loaded_specs['multipart-post'].version.to_s}"

  fields = json[:fields]
  fields['file'] = UploadIO.new(@database.dump_path, 'application/octet-stream', @database.filename)
  uri = URI.parse(json[:url])
  request = Net::HTTP::Post::Multipart.new uri.path, fields
  http = Net::HTTP.new(uri.host, uri.port)
  if uri.is_a? URI::HTTPS
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_NONE
  end

  retry_count = 0
  begin
    response = http.request(request)
  rescue # Errno::ECONNRESET, Errno::EPIPE, etc.
    raise if retry_count > 8
    retry_count += 1
    fields['file'].rewind
    log "upload failed: #{$!} - retrying after #{2 ** retry_count}sec..."
    sleep 2 ** retry_count
    retry
  end

  log "response from S3 = #{response.to_s} - #{response.body}"

  # http://apidock.com/ruby/Net/HTTPResponse
  case response
  when Net::HTTPSuccess
    true
  else
    abort_with("upload error: #{response.to_s} - #{response.body}", :upload_error)
  end
end

#upload_to_s3(json) ⇒ Object

Upload



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# File 'lib/dumper/job.rb', line 74

def upload_to_s3(json)
  if defined?(AWS::S3::MultipartUpload) and @filesize > 100.megabytes
    # aws-sdk gem installed
    upload_by_aws_sdk(json)
  else
    # fallback to multipart-post
    upload_by_multipart_post(json)
  end
rescue
  abort_with("upload error: #{$!} - please contact our support.", :upload_error)
end