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module Foreman::Model
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class Libvirt < ComputeResource
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validates_format_of :url, :with => URI.regexp
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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 ::Libvirt::RetrieveError => e
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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
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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 attr
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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 networks
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client.interfaces rescue []
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end
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def new_vm attr={ }
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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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client.servers.new opts
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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 "VM is not running!" unless vm.ready?
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raise "Spice display is not supported at the moment" if vm.display[:type] =~ /spice/i
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password = random_password
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vm.update_display(:password => password, :listen => '0')
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VNCProxy.start :host => hypervisor.hostname, :host_port => vm.display[:port], :password => password
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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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raise "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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protected
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def client
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# WARNING potential connection leak
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Thread.current[id] ||= ::Fog::Compute.new(:provider => "Libvirt", :libvirt_uri => url)
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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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{
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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 => { :type => 'vnc', :listen => '0', :password => random_password, :port => '-1' }
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}
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end
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def nested_attributes_for type, opts
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return unless opts
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opts.delete("new_#{type}") # delete template
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# convert our options hash into a sorted array (e.g. to preserve nic / disks order)
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opts = opts.sort { |l, r| l[0][0] <=> r[0][0] }.map { |e| Hash[e[1]] }
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opts.map do |k, v|
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if v[:"_delete"] == '1'
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nil
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else
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v.delete(:"_delete")
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v.symbolize_keys # convert to symbols deeper hashes
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end
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end.compact
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end
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def create_volumes args
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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.allocation = "0G"
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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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end
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