Module: Rudy::Routines::DiskHelper

Extended by:
DiskHelper
Includes:
HelperBase
Included in:
DiskHelper
Defined in:
lib/rudy/routines/helpers/diskhelper.rb

Class Method Summary collapse

Instance Method Summary collapse

Methods included from HelperBase

#command_separator, #execute_rbox_command, #keep_going?

Methods included from Huxtable

change_environment, change_position, change_region, change_role, change_zone, #check_keys, #config_dirname, create_domain, #current_group_name, #current_machine_address, #current_machine_count, #current_machine_group, #current_machine_hostname, #current_machine_image, #current_machine_name, #current_machine_size, #current_user, #current_user_keypairpath, debug?, #debug?, domain, domain_exists?, #group_metadata, #has_keypair?, #has_keys?, #has_pem_keys?, #has_root_keypair?, keypair_path_to_name, #known_machine_group?, #root_keypairname, #root_keypairpath, #switch_user, update_config, update_global, update_logger, #user_keypairname, #user_keypairpath

Class Method Details

.rudy_mkfs(*args) ⇒ Object

We need to add mkfs since it’s not enabled by default. We add it only to this instance we’re using. We give it a funny name so we can delete it.



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# File 'lib/rudy/routines/helpers/diskhelper.rb', line 29

def @rbox.rudy_mkfs(*args); cmd('mkfs', args); end

Instance Method Details

#create(disks) ⇒ Object 



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# File 'lib/rudy/routines/helpers/diskhelper.rb', line 135

def create(disks)
  rdisk = Rudy::Disks.new
  
  disks.each_pair do |path, props|
    disk = Rudy::MetaData::Disk.new(path, props[:size], props[:device], @machine.position)
    olddisk = rdisk.get(disk.name)
    if olddisk && olddisk.exists?
      olddisk.update
      puts "Disk found: #{olddisk.name}"
      if olddisk.attached?
        puts "In use. Skipping...".color(:red)
        return
      else
        disk = olddisk
      end
    else
      puts "Creating #{disk.name} "
      disk.fstype = props[:fstype] || 'ext3'
    end
    
    unless disk.exists? # Checks the EBS volume
      msg = "Creating volume... "
      disk.create
      Rudy::Utils.waiter(2, 60, STDOUT, msg) { 
        disk.available?
      }
    end
    
    msg = "Attaching #{disk.awsid} to #{@machine.awsid}... "
    disk.attach(@machine.awsid)
    Rudy::Utils.waiter(2, 10, STDOUT, msg) { 
      disk.attached?
    }
    
    # The device needs some time. 
    # Otherwise mkfs returns:
    # "No such file or directory while trying to determine filesystem size"
    sleep 2 
    
    # TODO: Cleanup. See ScriptHelper
    begin
      if disk.raw == true
        print "Creating #{disk.fstype} filesystem for #{disk.device}... "
        @rbox.rudy_mkfs(:t, disk.fstype, :F, disk.device)
        disk.raw = false
        disk.save
        puts "done"
      end
      
      @rbox.mkdir(:p, disk.path)
      
      print "Mounting at #{disk.path}... "
  
      ret = @rbox.mount(:t, disk.fstype, disk.device, disk.path) 
      print_response ret
      if ret.exit_code > 0
        STDERR.puts "Error creating disk".color(:red)
        return
      else
        puts "done"
      end
      disk.mounted = true
      disk.save
      
    rescue Net::SSH::AuthenticationFailed, Net::SSH::HostKeyMismatch => ex  
      STDERR.puts "Error creating disk".color(:red)
      STDERR.puts ex.message.color(:red)
     rescue Rye::CommandNotFound => ex
      puts "  CommandNotFound: #{ex.message}".color(:red)
      
    rescue
      STDERR.puts "Error creating disk" .color(:red)
      Rudy::Utils.bug
    end
 
  end
end

#destroy(disks) ⇒ Object 



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# File 'lib/rudy/routines/helpers/diskhelper.rb', line 295

def destroy(disks)
  rdisk = Rudy::Disks.new
  
  disks.each_pair do |path, props|
    adisk = Rudy::MetaData::Disk.new(path, props[:size], props[:device], @machine.position)
    disk = rdisk.get(adisk.name)
    if disk == nil
      puts "Not found: #{adisk.name}".color(:red)
      return
    end
    
    puts "Destroying #{disk.name}"

    if disk.mounted?
      print "Unmounting #{disk.path}..."
      execute_rbox_command { @rbox.umount(disk.path) }
      puts " done"
      sleep 0.5
    end
    
    if disk.attached?
      msg = "Detaching #{disk.awsid}..."
      disk.detach 
      Rudy::Utils.waiter(2, 60, STDOUT, msg) { 
        disk.available? 
      }
      sleep 0.5
    end
    
    puts "Destroying volume and metadata... "
    disk.destroy
    
  end
end

#disks?(routine) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rudy/routines/helpers/diskhelper.rb', line 8

def disks?(routine)
  (routine.is_a?(Caesars::Hash) && routine.disks && 
  routine.disks.is_a?(Caesars::Hash) && !routine.disks.empty?) ? true : false
end

#execute(routine, machine, rbox) ⇒ Object 



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# File 'lib/rudy/routines/helpers/diskhelper.rb', line 18

def execute(routine, machine, rbox)
  return unless routine
  raise "Not a Rudy::Machine" unless machine.is_a?(Rudy::Machine)
  raise "Not a Rye::Box" unless rbox.is_a?(Rye::Box)
  
  @machine = machine
  @rbox = rbox
  
  # We need to add mkfs since it's not enabled by default. 
  # We add it only to this instance we're using. 
  # We give it a funny name so we can delete it. 
  def @rbox.rudy_mkfs(*args); cmd('mkfs', args); end
  
  unless disks?(routine)
    STDERR.puts "[nothing to do]"
    return
  end

  modified = []
  routine.disks.each_pair do |action, disks|
    unless DiskHelper.respond_to?(action)  
      STDERR.puts %Q(DiskHelper: unknown action "#{action}")
      next
    end
    send(action, disks) # create, copy, destroy, ...
    modified << disks
  end
  
  # TODO: remove rudy_mkfs method
  
end

#mount(disks) ⇒ Object 



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# File 'lib/rudy/routines/helpers/diskhelper.rb', line 213

def mount(disks)
  rdisk = Rudy::Disks.new
  disks.each_pair do |path, props|
    adisk = Rudy::MetaData::Disk.new(path, props[:size], props[:device], @machine.position)
    disk = rdisk.get(adisk.name)
    if disk == nil
      puts "Not found: #{adisk.name}".color(:red)
      return
    end
    
    msg = "Attaching #{disk.awsid} to #{@machine.awsid}... "
    disk.attach(@machine.awsid)
    Rudy::Utils.waiter(2, 10, STDOUT, msg) { 
      disk.attached?
    }
    
    sleep 2
    
    begin
      @rbox.mkdir(:p, disk.path)
      
      print "Mounting at #{disk.path}... "
  
      ret = @rbox.mount(:t, disk.fstype, disk.device, disk.path) 
      print_response ret
      if ret.exit_code > 0
        STDERR.puts "Error creating disk".color(:red)
        return
      else
        puts "done"
      end
      disk.mounted = true
      disk.save
      
    rescue Net::SSH::AuthenticationFailed, Net::SSH::HostKeyMismatch => ex  
      STDERR.puts "Error creating disk".color(:red)
      STDERR.puts ex.message.color(:red)
     rescue Rye::CommandNotFound => ex
      puts "  CommandNotFound: #{ex.message}".color(:red)
      
    rescue
      STDERR.puts "Error creating disk" .color(:red)
      Rudy::Utils.bug
    end
    
  end
end

#paths(routine) ⇒ Object 



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# File 'lib/rudy/routines/helpers/diskhelper.rb', line 13

def paths(routine)
  return nil unless disks?(routine)
  routine.disks.values.collect { |d| d.keys }.flatten
end

#restore(disks) ⇒ Object 



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# File 'lib/rudy/routines/helpers/diskhelper.rb', line 66

def restore(disks)
  rdisk = Rudy::Disks.new
  rback = Rudy::Backups.new
  
  disks.each_pair do |path, props|
    disk = Rudy::MetaData::Disk.new(path, props[:size], props[:device], @machine.position)
    
    olddisk = rdisk.get(disk.name)
    back = nil
    if olddisk && olddisk.exists?
      olddisk.update
      puts "Disk found: #{olddisk.name}. Skipping...".color(:red)
      return
    else
      disk.fstype = props[:fstype] || 'ext3'
      back = (rback.list(nil, nil, props) || []).first
      raise "No backup found" unless back
      puts "Found backup #{back.name} "
    end
    
    
    
    unless disk.exists? # Checks the EBS volume
      msg = "Creating volume from snapshot (#{back.awsid})... "
      disk.create(back.size, @@global.zone, back.awsid)
      Rudy::Utils.waiter(2, 60, STDOUT, msg) { 
        disk.available?
      }
    end
    
    msg = "Attaching #{disk.awsid} to #{@machine.awsid}... "
    disk.attach(@machine.awsid)
    Rudy::Utils.waiter(2, 10, STDOUT, msg) { 
      disk.attached?
    }
    
    sleep 2
    
    begin
      @rbox.mkdir(:p, disk.path)
      
      print "Mounting at #{disk.path}... "
  
      ret = @rbox.mount(:t, disk.fstype, disk.device, disk.path) 
      print_response ret
      if ret.exit_code > 0
        STDERR.puts "Error creating disk".color(:red)
        return
      else
        puts "done"
      end
      disk.mounted = true
      disk.save
      
    rescue Net::SSH::AuthenticationFailed, Net::SSH::HostKeyMismatch => ex  
      STDERR.puts "Error creating disk".color(:red)
      STDERR.puts ex.message.color(:red)
     rescue Rye::CommandNotFound => ex
      puts "  CommandNotFound: #{ex.message}".color(:red)
      
    rescue
      STDERR.puts "Error creating disk" .color(:red)
      Rudy::Utils.bug
    end
    
  end
end

#snapshot(disks) ⇒ Object 



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# File 'lib/rudy/routines/helpers/diskhelper.rb', line 50

def snapshot(disks)
  rdisk = Rudy::Disks.new
  rback = Rudy::Backups.new
  
  disks.each_pair do |path, props|
    adisk = Rudy::MetaData::Disk.new(path, props[:size], props[:device], @machine.position)
    disk = rdisk.get(adisk.name)
    if disk == nil
      puts "Not found: #{adisk.name}".color(:red)
      return
    end
    back = disk.backup
    puts "Created backup: #{back.name}"
  end
end

#umount(disks) ⇒ Object Also known as: unmount 



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# File 'lib/rudy/routines/helpers/diskhelper.rb', line 262

def umount(disks)
  rdisk = Rudy::Disks.new
  disks.each_pair do |path, props|
    adisk = Rudy::MetaData::Disk.new(path, props[:size], props[:device], @machine.position)
    disk = rdisk.get(adisk.name)
    if disk == nil
      puts "Not found: #{adisk.name}".color(:red)
      return
    end
    
    if disk.mounted?
      print "Unmounting #{disk.path}..."
      execute_rbox_command { @rbox.umount(disk.path) }
      puts " done"
      sleep 0.5
    end
    
    sleep 2
    
    if disk.attached?
      msg = "Detaching #{disk.awsid}..."
      disk.detach 
      Rudy::Utils.waiter(2, 60, STDOUT, msg) { 
        disk.available? 
      }
      sleep 0.5
    end
    
    
  end
end