Class: VCAP::Services::Base::Backup

Inherits:
Object
  • Object
show all
Defined in:
lib/base/backup.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Backup

Returns a new instance of Backup.



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# File 'lib/base/backup.rb', line 31

def initialize
  @run_lock = Mutex.new
  @shutdown = false
  trap("TERM") { exit_fun }
  trap("INT") { exit_fun }
end

Instance Method Details

#check_mount_points ⇒ Object 



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# File 'lib/base/backup.rb', line 124

def check_mount_points
  # make sure the backup base dir is mounted
  pn = Pathname.new(@config["backup_base_dir"])
  if !@tolerant && !pn.mountpoint?
    echo @config["backup_base_dir"] + " is not mounted, exit",true
    exit
  end
end

#echo(output, err = false) ⇒ Object 



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# File 'lib/base/backup.rb', line 133

def echo(output, err=false)
  if err
    $stderr.puts(output) unless @logger
    @logger.error(output) if @logger
  else
    $stdout.puts(output) unless @logger
    @logger.info(output) if @logger
  end
end

#exit_fun ⇒ Object 



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# File 'lib/base/backup.rb', line 42

def exit_fun
  @shutdown = true
  Thread.new do
    @run_lock.synchronize { exit }
  end
end

#get_dump_path(name, options = {}) ⇒ Object 



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# File 'lib/base/backup.rb', line 112

def get_dump_path(name, options={})
  name = name.sub(/^(mongodb|redis)-/,'')
  mode = options[:mode] || 0
  time = options[:time] || Time.now
  case mode
  when 1
    File.join(@config['backup_base_dir'], 'backups', @config['service_name'],name, time.to_i.to_s,@config['node_id'])
  else
    File.join(@config['backup_base_dir'], 'backups', @config['service_name'], name[0,2], name[2,2], name[4,2], name, time.to_i.to_s)
  end
end

#more_options(opts) ⇒ Object 



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# File 'lib/base/backup.rb', line 160

def more_options(opts)
end

#parse_options ⇒ Object 



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# File 'lib/base/backup.rb', line 143

def parse_options
  OptionParser.new do |opts|
    opts.banner = "Usage: #{File.basename(script_file)} [options]"
    opts.on("-c", "--config [ARG]", "Node configuration File") do |opt|
      @config_file = opt
    end
    opts.on("-h", "--help", "Help") do
      puts opts
      exit
    end
    opts.on("-t", "--tolerant",    "Tolerant mode") do
      @tolerant = true
    end
    more_options(opts)
  end.parse!
end

#script_file ⇒ Object 



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# File 'lib/base/backup.rb', line 38

def script_file
  $0
end

#single_app(&blk) ⇒ Object 



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# File 'lib/base/backup.rb', line 49

def single_app(&blk)
  if File.open(script_file).flock(File::LOCK_EX|File::LOCK_NB)
    blk.call
  else
    echo "Script #{ script_file } is already running",true
  end
end

#start ⇒ Object 



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# File 'lib/base/backup.rb', line 57

def start
  single_app do
    echo "#{File.basename(script_file)} starts"
    @config_file = default_config_file
    parse_options

    echo "Load config file"
    # load conf file
    begin
      @config = YAML.load(File.open(@config_file))
    rescue => e
      echo "Could not read configuration file: #{e}",true
      exit
    end

    # Setup logger
    echo @config["logging"]
    logging_config = Steno::Config.from_hash(@config["logging"])
    Steno.init(logging_config)
    # Use running binary name for logger identity name.
    @logger = Steno.logger(File.basename(script_file))

    # Make pidfile
    if @config["pid"]
      pf = VCAP::PidFile.new(@config["pid"])
      pf.unlink_at_exit
    end

    echo "Check mount points"
    check_mount_points

    # make sure backup dir on nfs storage exists
    @nfs_base = @config["backup_base_dir"] + "/backups/" + @config["service_name"]
    echo "Check NFS base"
    if File.directory? @nfs_base
      echo @nfs_base + " exists"
    else
      echo @nfs_base + " does not exist, create it"
      begin
        FileUtils.mkdir_p @nfs_base
      rescue => e
        echo "Could not create dir on nfs!",true
        exit
      end
    end
    echo "Run backup task"
    @run_lock.synchronize { backup_db }
    echo "#{File.basename(script_file)} task is completed"
  end
rescue => e
  echo "Error: #{e.message}\n #{e.backtrace}",true
rescue Interrupt => it
  echo "Backup is interrupted!"
end