Class: S3Rsync::Sync

Inherits:
Base
  • Object
show all
Defined in:
lib/s3rsync/sync.rb

Instance Method Summary collapse

Methods inherited from Base

#error_exit, #init_logger, #init_statsd, #pass_cli

Constructor Details

#initialize(opt) ⇒ Sync

Returns a new instance of Sync.



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# File 'lib/s3rsync/sync.rb', line 9

def initialize(opt)
  @log = init_logger(opt['log-path'])
  @log.debug "opt: #{opt.inspect}"
  @params = {}
  @params[:path]        = File.expand_path(opt['path'])
  @params[:s3_prefix]   = opt['s3-prefix']
  @params[:config_path] = opt['config-path']
  @params[:s3cmd_conf]  = @params[:config_path].sub('.json', '_s3rsync.conf')
  @params[:dry_run]     = opt['dry-run']
  @params[:make_public] = opt['make-public']
  @params[:enable_lock] = opt['enable-lock']
  @log.debug "@params[:config_path]: #{@params[:config_path]}"
  begin
    conf = JSON.parse File.read(@params[:config_path])
  rescue Exception => e
    error_exit "ERROR: opening or parsing config file failed: #{e.inspect}"
  end
  
  @log.debug "conf: #{conf}"
  @params[:s3_bucket]   = conf['env.static.s3.bucket']
  @params[:s3_access]   = conf['env.static.s3.key.user']
  @params[:s3_secret]   = conf['env.static.s3.key.secret']
  @params[:statsd_host] = conf['env.metrics.host'] || 'localhost'
  @params[:statsd_port] = conf['env.metrics.port'] || 8125
  @log.debug "@params: #{@params.inspect}"
  @statsd = init_statsd @params[:statsd_host], @params[:statsd_port]
  @log.debug "@statsd: #{@statsd.inspect}"
  
  init_s3cmd_conf
  @s3cmd = "s3cmd"
end

Instance Method Details

#get_lock(name = 'common') ⇒ Object 



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# File 'lib/s3rsync/sync.rb', line 41

def get_lock(name = 'common')
  lockfile = Lockfile.new(
  "/tmp/s3rsync_#{name}.lock",
  :timeout  => 3,
  :max_age  => 3600,
  :debug    => !ENV['DEBUG'].nil?
  )
end

#init_s3cmd_conf ⇒ Object 



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# File 'lib/s3rsync/sync.rb', line 50

def init_s3cmd_conf
  @log.debug "@params[:s3cmd_conf]: #{@params[:s3cmd_conf]}"
  if !File.exists? @params[:s3cmd_conf]
    @log.info "Generating dynamic s3cfg: #{@params[:s3cmd_conf]}"
    begin
      erb_path = File.join(File.dirname(__FILE__), 'templates', 's3cmd_conf.erb')
      erb_template = IO.read erb_path
      @log.debug "erb_template: #{erb_template.inspect}"
      erb = ERB.new erb_template
      rendered_template = erb.result(binding)
      @log.debug "rendered_template: #{rendered_template}"
      File.write @params[:s3cmd_conf], rendered_template
    rescue Exception => e
      error_exit "generating s3cmd config failed: #{e.inspect}"
    end
    @log.info "Dynamic s3cfg generated: #{@params[:s3cmd_conf]}"
  end
end

#run(mode = :upload) ⇒ Object 



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# File 'lib/s3rsync/sync.rb', line 69

def run(mode = :upload)
  init_s3cmd_conf
  
  valid_file_upload = (mode == :upload && File.exists?(@params[:path])) 
  if !Dir.exists?(@params[:path]) && !valid_file_upload
    @log.error "Local dir or file not exist on disk: #{@params[:path]}"
    return 4
  end
  
  @params[:path] += '/' if Dir.exists?(@params[:path])
  sync_locations = "#{@params[:path]} s3://#{@params[:s3_bucket]}/#{@params[:s3_prefix]}#{@params[:path]}"
  @log.debug "original sync_locations: #{sync_locations}"
  
  if @params[:enable_lock]
    lockfile = get_lock(mode)
    @log.debug "lockfile: #{lockfile.inspect}"
    if lockfile.locked?
      @log.warn "lock file found, exiting: #{lockfile.inspect}"
      return 5
    end
  end
  
  if mode == :download
    @log.debug "reversing sync_locations"
    sync_locations = sync_locations.split(' ').reverse.join(' ')
    @log.debug "download sync_locations: #{sync_locations}"
  end
  
  sync_output = 1
  begin
    lockfile.lock if @params[:enable_lock]
    s3cmd_args = {}
    s3cmd_args['-c']            = @params[:s3cmd_conf]
    s3cmd_args['--dry-run']     = '' if @params[:dry_run]
    s3cmd_args['--acl-public']  = '' if @params[:make_public]
    @log.debug "s3cmd_args: #{s3cmd_args.inspect}"
    compiled_args = s3cmd_args.to_a.flatten.reject { |v| v.empty? }.join(' ')
    @log.debug "compiled_args: #{compiled_args.inspect}"
    cmd = "#{@s3cmd} #{compiled_args} sync #{sync_locations}"
    @log.debug "cmd: #{cmd}"
    sync_output = pass_cli cmd
    @log.debug "sync_output: #{sync_output.inspect}"
  rescue Exception => e
    sync_output = 1
    @log.error "something wrong while trying to run the sync: #{e.inspect}"
  ensure
    lockfile.unlock if @params[:enable_lock]
  end
  
  if (sync_output == 1) || sync_output.downcase.include?('error')
    @log.error "errors found in output: #{sync_output}"
    return 1
  else
    return 0
  end
end