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module Foreman::Model
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class Libvirt < ComputeResource
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validates :url, :format => { :with => URI.regexp }
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# Some getters/setters for the attrs Hash
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def display_type
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self.attrs[:display].present? ? self.attrs[:display] : 'vnc'
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end
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def display_type=(display)
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self.attrs[:display] = display
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end
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def provided_attributes
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super.merge({:mac => :mac})
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end
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def capabilities
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[:build]
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end
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def find_vm_by_uuid uuid
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client.servers.get(uuid)
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rescue ::Libvirt::RetrieveError => e
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raise(ActiveRecord::RecordNotFound)
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end
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# we default to destroy the VM's storage as well.
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def destroy_vm uuid, args = { }
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find_vm_by_uuid(uuid).destroy({ :destroy_volumes => true }.merge(args))
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rescue ActiveRecord::RecordNotFound
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true
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end
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def self.model_name
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ComputeResource.model_name
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end
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def max_cpu_count
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hypervisor.cpus
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end
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# libvirt reports in KB
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def max_memory
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hypervisor.memory * 1024
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rescue => e
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logger.debug "unable to figure out free memory, guessing instead due to:#{e}"
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16*1024*1024*1024
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end
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def test_connection options = {}
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super
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errors[:url].empty? and hypervisor
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rescue => e
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disconnect rescue nil
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errors[:base] << e.message
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end
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def new_nic attr={ }
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client.nics.new attr
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end
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def new_volume attr={ }
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client.volumes.new(attrs.merge(:allocation => '0G'))
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end
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def storage_pools
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client.pools rescue []
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end
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def interfaces
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client.interfaces rescue []
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end
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def networks
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client.networks rescue []
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end
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def new_vm attr={ }
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test_connection
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return unless errors.empty?
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opts = vm_instance_defaults.merge(attr.to_hash).symbolize_keys
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# convert rails nested_attributes into a plain hash
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[:nics, :volumes].each do |collection|
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nested_attrs = opts.delete("#{collection}_attributes".to_sym)
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opts[collection] = nested_attributes_for(collection, nested_attrs) if nested_attrs
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end
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opts.reject! { |k, v| v.nil? }
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vm = client.servers.new opts
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vm.memory = opts[:memory] if opts[:memory]
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vm
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end
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def create_vm args = { }
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vm = new_vm(args)
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create_volumes :prefix => vm.name, :volumes => vm.volumes
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vm.save
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rescue Fog::Errors::Error => e
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errors.add(:base, e.to_s)
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false
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end
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def console uuid
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vm = find_vm_by_uuid(uuid)
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raise Foreman::Exception.new(N_("VM is not running!")) unless vm.ready?
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password = random_password
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# Listen address cannot be updated while the guest is running
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# When we update the display password, we pass the existing listen address
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vm.update_display(:password => password, :listen => vm.display[:listen], :type => vm.display[:type])
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WsProxy.start(:host => hypervisor.hostname, :host_port => vm.display[:port], :password => password).merge(:type => vm.display[:type].downcase, :name=> vm.name)
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rescue ::Libvirt::Error => e
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if e.message =~ /cannot change listen address/
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logger.warn e
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Foreman::Exception.new(N_("Unable to change VM display listen address, make sure the display is not attached to localhost only"))
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else
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raise e
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end
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end
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def hypervisor
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client.nodes.first
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end
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def associated_host(vm)
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Host.authorized(:view_hosts, Host).where(:mac => vm.mac).first
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end
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protected
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def client
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# WARNING potential connection leak
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tries ||= 3
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Thread.current[url] ||= ::Fog::Compute.new(:provider => "Libvirt", :libvirt_uri => url)
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rescue ::Libvirt::RetrieveError
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Thread.current[url] = nil
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retry unless (tries -= 1).zero?
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end
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def disconnect
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client.terminate if Thread.current[url]
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Thread.current[url] = nil
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end
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def vm_instance_defaults
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super.merge(
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:memory => 768*1024*1024,
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:boot_order => %w[network hd],
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:nics => [new_nic],
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:volumes => [new_volume],
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:display => {
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:type => display_type.downcase,
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:listen => Setting[:libvirt_default_console_address],
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:password => random_password,
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:port => '-1'
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}
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)
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end
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def create_volumes args
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args[:volumes].each {|vol| validate_volume_capacity(vol)}
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begin
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vols = []
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(volumes = args[:volumes]).each do |vol|
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vol.name = "#{args[:prefix]}-disk#{volumes.index(vol)+1}"
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vol.capacity = "#{vol.capacity}G" unless vol.capacity.to_s.end_with?('G')
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vol.allocation = "#{vol.allocation}G" unless vol.allocation.to_s.end_with?('G')
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vol.save
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vols << vol
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end
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vols
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rescue => e
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logger.debug "Failure detected #{e}: removing already created volumes" if vols.any?
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vols.each { |vol| vol.destroy }
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raise e
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end
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end
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def validate_volume_capacity(vol)
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if vol.capacity.to_s.empty? or /\A\d+G?\Z/.match(vol.capacity.to_s).nil?
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raise Foreman::Exception.new(N_("Please specify volume size. You may optionally use suffix 'G' to specify volume size in gigabytes."))
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end
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end
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end
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end
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