Class: MiqOpenStackInstance

Inherits:
Object
  • Object
show all
Includes:
MiqOpenStackCommon
Defined in:
lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb

Overview

TODO: Create common base class for MiqOpenStackInstance and MiqOpenStackImage and factor out common code. Also, refactor MiqVm so it can be a proper super class.

Constant Summary collapse

SUPPORTED_METHODS = 
[:rootTrees, :extract, :diskInitErrors, :vmConfig, :volumeManager]

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from MiqOpenStackCommon

#create_image_from_snapshot, #disk_format, #disk_format_glance_v1, #disk_format_glance_v2, #download_image_data_glance_v2, #get_image_file_common, #get_image_file_glance_v1, #get_image_file_glance_v2, #get_image_metadata_snapshot_id

Constructor Details

#initialize(instance_id, openstack_handle) ⇒ MiqOpenStackInstance

Returns a new instance of MiqOpenStackInstance.



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 16

def initialize(instance_id, openstack_handle)
  @instance_id      = instance_id
  @openstack_handle = openstack_handle
  @vmConfigFile     = instance_id
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(sym, *args) ⇒ Object (private) 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 201

def method_missing(sym, *args)
  return super unless SUPPORTED_METHODS.include? sym
  return miq_vm.send(sym) if args.empty?
  miq_vm.send(sym, args)
end

Instance Attribute Details

#vmConfigFile ⇒ Object (readonly)

Returns the value of attribute vmConfigFile.



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 12

def vmConfigFile
  @vmConfigFile
end

Instance Method Details

#compute_service ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 22

def compute_service
  @compute_service ||= @openstack_handle.compute_service
end

#create_evm_snapshot(options = {}) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 73

def create_evm_snapshot(options = {})
  log_prefix = "MIQ(#{self.class.name}##{__method__}) instance_id=[#{@instance_id}]"

  miq_snapshot = nil
  if snapshot_image_id
    $log.debug "#{log_prefix}: Found pointer to existing snapshot: #{snapshot_image_id}"
    miq_snapshot = begin
      image_service.images.get(snapshot_image_id)
    rescue => err
      $log.debug "#{log_prefix}: #{err}"
      $log.debug err.backtrace.join("\n")
      nil
    end

    if miq_snapshot
      raise "Already has an EVM snapshot: #{miq_snapshot.name}, with id: #{miq_snapshot.id}"
    else
      $log.debug "#{log_prefix}: Snapshot does not exist, deleting metadata"
      snapshot_metadata.destroy
    end
  else
    $log.debug "#{log_prefix}: No existing snapshot detected for: #{instance.name}"
  end

  $log.debug "#{log_prefix}: Snapshotting instance: #{instance.name}..."
  # TODO: pass in snapshot name.
  rv = compute_service.create_image(instance.id, "EvmSnapshot", :description => options[:desc])
  rv.body['image'][:service] = image_service

  miq_snapshot = image_service.images.get(rv.body['image']['id'])

  until miq_snapshot.status.upcase == "ACTIVE"
    $log.debug "#{log_prefix}: #{miq_snapshot.status}"
    sleep 1
    # TODO(lsmola) identity is missing in Glance V2 object, fix it in Fog, then miq_snapshot.reload will work
    # miq_snapshot.reload
    miq_snapshot = image_service.images.get(miq_snapshot.id)
  end
  $log.debug "#{log_prefix}: #{miq_snapshot.status}"
  $log.debug "#{log_prefix}: EVM snapshot creation complete"

  instance.metadata.update(:miq_snapshot => miq_snapshot.id)
  return miq_snapshot
rescue => err
  $log.error "#{log_prefix}, error: #{err}"
  $log.debug err.backtrace.join("\n") if $log.debug?
  raise
end

#create_snapshot(options = {}) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 52

def create_snapshot(options = {})
  log_prefix = "MIQ(#{self.class.name}##{__method__}) instance_id=[#{@instance_id}]"

  $log.debug "#{log_prefix}: Snapshotting instance: #{instance.name}..."

  snapshot = compute_service.create_image(instance.id, options[:name], :description => options[:desc])

  $log.debug "#{log_prefix}: #{snapshot.status}"
  $log.debug "#{log_prefix}: snapshot creation complete"

  return snapshot.body["image"]
rescue => err
  $log.error "#{log_prefix}, error: #{err}"
  $log.debug err.backtrace.join("\n") if $log.debug?
  raise
end

#delete_evm_snapshot(image_id) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 122

def delete_evm_snapshot(image_id)
  log_prefix = "MIQ(#{self.class.name}##{__method__}) snapshot=[#{image_id}]"

  snapshot = begin
    image_service.images.get(image_id)
  rescue => err
    $log.debug "#{log_prefix}: #{err}"
    $log.debug err.backtrace.join("\n")
    nil
  end

  if snapshot
    begin
      if snapshot_image_id != image_id
        $log.warn "#{log_prefix}: pointer from instance doesn't match #{snapshot_image_id}"
      end
      $log.info "#{log_prefix}: deleting snapshot image"

      image = compute_service.images.get(image_id)
      image.metadata.each do |m|
        next unless m.key == "block_device_mapping"
        m.value.each do |volume_snapshot|
          volume_snapshot_id = volume_snapshot["snapshot_id"]
          delete_volume_snapshot(volume_snapshot_id) if volume_snapshot_id
        end
      end
      snapshot.destroy
      snapshot_metadata.destroy
    rescue => err
      $log.debug "#{log_prefix}: #{err}"
      $log.debug err.backtrace.join("\n") if $log.debug?
    end
  else
    $log.info "#{log_prefix}: no longer exists, deleting references"
  end
end

#delete_snapshot(image_id) ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 69

def delete_snapshot(image_id)
  delete_evm_snapshot(image_id)
end

#image_service ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 26

def image_service
  @image_service ||= @openstack_handle.detect_image_service
end

#instance ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 34

def instance
  @instance ||= compute_service.servers.get(@instance_id)
end

#snapshot_image_id ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 42

def snapshot_image_id
  @snapshot_image_id ||= snapshot_metadata && snapshot_metadata.value
end

#snapshot_metadata ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 38

def snapshot_metadata
  @snapshot_metadata ||= instance.metadata.length > 0 && instance.metadata.get(:miq_snapshot)
end

#unmount ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 46

def unmount
  return unless @miq_vm
  @miq_vm.unmount
  @temp_image_file.unlink
end

#volume_service ⇒ Object 



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# File 'lib/OpenStackExtract/MiqOpenStackVm/MiqOpenStackInstance.rb', line 30

def volume_service
  @volume_service ||= @openstack_handle.detect_volume_service
end