Class: Cumulus::EC2::EbsManager

Inherits:
Common::Manager show all
Defined in:
lib/ec2/managers/EbsManager.rb

Defined Under Namespace

Classes: EbsMigrationData

Instance Method Summary collapse

Methods inherited from Common::Manager

#diff, #diff_one, #filter_local, #list, #sync, #sync_one

Constructor Details

#initialize ⇒ EbsManager

Returns a new instance of EbsManager.



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# File 'lib/ec2/managers/EbsManager.rb', line 15

def initialize
  super()
  @create_asset = true
  @client = Aws::EC2::Client.new(Configuration.instance.client)
end

Instance Method Details

#added_diff(local) ⇒ Object 



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# File 'lib/ec2/managers/EbsManager.rb', line 37

def added_diff(local)
  EbsGroupDiff.added(local)
end

#aws_resources ⇒ Object 



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# File 'lib/ec2/managers/EbsManager.rb', line 29

def aws_resources
  @aws_resources ||= EC2::group_ebs_volumes
end

#create(local) ⇒ Object 



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# File 'lib/ec2/managers/EbsManager.rb', line 99

def create(local)
  local.volume_groups.each do |vg|
    vg.count.times do
      create_volume(vg, local.availability_zone, local.name)
    end
  end
end

#diff_resource(local, aws) ⇒ Object 



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# File 'lib/ec2/managers/EbsManager.rb', line 41

def diff_resource(local, aws)
  local.diff(aws)
end

#local_resources ⇒ Object 



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# File 'lib/ec2/managers/EbsManager.rb', line 25

def local_resources
  @local_resources ||= Hash[EbsLoader.groups.map { |local| [local.name, local] }]
end

#migrate ⇒ Object 



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# File 'lib/ec2/managers/EbsManager.rb', line 46

def migrate
  puts Colors.blue("Migrating EBS Volume Groups...")

  # Create the directories
  ec2_dir = "#{@migration_root}/ec2"
  ebs_dir = "#{ec2_dir}/ebs"

  if !Dir.exists?(@migration_root)
    Dir.mkdir(@migration_root)
  end
  if !Dir.exists?(ec2_dir)
    Dir.mkdir(ec2_dir)
  end
  if !Dir.exists?(ebs_dir)
    Dir.mkdir(ebs_dir)
  end

  puts "Would you like Cumulus to automatically update your volumes to have a Group tag that matches the name of the instance they are attached to? (y/n)"
  update_tags = (STDIN.getc.downcase[0] == "y")

  # Migrate any volumes that have already been grouped
  vol_groups = Hash[EC2.group_ebs_volumes.map { |group_name, cumulus_group| [group_name, EbsMigrationData.new(cumulus_group, nil)] }]

  # Use the instance name to group volumes if they do not have a group.  Anything
  # not attached should not get migrated
  migratable_vols = EC2.ebs_volumes.select { |vol| vol.group.nil? and !vol.attachments.empty? and vol.attached? }
  instance_grouped = migratable_vols.group_by do |vol|
    attachments = vol.attachments.select { |att| att.state == "attached" || att.state == "attaching" }
    attachments.first.instance_id
  end

  instance_grouped.each do |instance_id, vols|
    instance_name = EC2.id_instances[instance_id].name || instance_id
    vol_groups[instance_name] = EbsMigrationData.new(EbsGroupConfig.new(instance_name).populate!(vols), vols)
  end

  vol_groups.each do |group_name, data|
    puts "Migrating group #{group_name}"

    if update_tags and data.set_group_vols
      data.set_group_vols.each do |vol|
        if vol.group.nil?
          set_group_name(vol.volume_id, group_name)
        end
      end
    end

    json = JSON.pretty_generate(data.cumulus_group.to_hash)
    File.open("#{ebs_dir}/#{group_name}.json", "w") { |f| f.write(json) }
  end

end

#resource_name ⇒ Object 



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# File 'lib/ec2/managers/EbsManager.rb', line 21

def resource_name
  "EBS Volume Group"
end

#unmanaged_diff(aws) ⇒ Object 



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# File 'lib/ec2/managers/EbsManager.rb', line 33

def unmanaged_diff(aws)
  EbsGroupDiff.unmanaged(aws)
end

#update(local, diffs) ⇒ Object 



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# File 'lib/ec2/managers/EbsManager.rb', line 107

def update(local, diffs)

  # If they tried to update AZ, use the old value
  availability_zone = (diffs.select { |d| d.type == EbsGroupChange::AZ }.first.aws rescue local.availability_zone)

  diffs.each do |diff|
    case diff.type
    when EbsGroupChange::AZ
      puts Colors.blue("Availability zone cannot be updated")
    when EbsGroupChange::VG_REMOVED
      puts Colors.blue("Cumulus does not delete or detach volumes. Manually update #{diff.local.description}")
    when EbsGroupChange::VG_ADDED
      added_vg = diff.local
      puts Colors.blue("Creating #{added_vg.count} x #{added_vg.description}...")
      added_vg.count.times do
        create_volume(added_vg, availability_zone, local.name)
      end
    when EbsGroupChange::VG_COUNT
      if diff.local.count < diff.aws.count
        puts Colors.blue("Cumulus will not delete or detach volumes. Manually update #{diff.local.description}")
      else
        num_added = diff.local.count - diff.aws.count
        puts Colors.blue("Adding #{num_added} x #{diff.local.description}...")
        num_added.times do
          create_volume(diff.local, availability_zone, local.name)
        end
      end
    end
  end
end