Using the ruby sdk I'm unable to start a VM on a specific host. According to the API docs at api/v4/model#types/vm_placement_policy : Name Type ---------------- hosts Host[] No matter what I specify, I run into this same bug: https://bugzilla.redhat.com/show_bug.cgi?id=1249521 65: require 'pry' 66: binding.pry 67: => 68: machine.start( 69: use_cloud_init: true, 70: vm: vm_configuration 71: ) 72: 73: @app.call(env) [1] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> vm_configuration[:placement_policy] = { :hosts => [{ :host => 'server.test.local' }], :affinity => 'pinned' } [2] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> vm_configuration => {:initialization=> {:host_name=>"test", :nic_configurations=>[{:name=>"eth0", :on_boot=>true, :boot_protocol=>"static", :ip=>{:version=>"v4", :address=>"192.168.2.200", :gateway=>"192.168.2.1"}}], :custom_script=> "write_files:\n - content: |\n wat\n path: /tmp/something.txt\n permissions: '0644'\nnetwork-interfaces: |\n auto eth0\n iface eth0 inet static\n address 192.168.2.201\n network 192.168.2.0\n netmask 255.255.255.0\n gateway 192.168.2.1\n dns-nameservers 192.168.2.113 192.168.2.1\n"}, :placement_policy=>{:hosts=>[{:host=>"server.test.local"}], :affinity=>"pinned"}} ==> default: An error occured. Recovering.. ==> default: Halting VM... ==> default: Waiting for VM to shutdown... ==> default: Removing VM... /home/myoung/.rvm/gems/ruby-2.2.3/gems/ovirt-engine-sdk-4.1.2/lib/ovirtsdk4/service.rb:52:in `raise_error': Fault reason is "Incomplete parameters". Fault detail is "Host [id|name] required for validateAndUpdateHostsInPlacementPolicy". HTTP response code is 400. (OvirtSDK4::Error) The same goes with giving an object instead of a hash object => 68: machine.start( 69: use_cloud_init: true, 70: vm: vm_configuration 71: ) 72: 73: @app.call(env) [1] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> hosts_service = env[:connection].system_service.hosts_service [2] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> host = hosts_service.list(search: 'name=server.test.local')[0] [3] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> host.status => "up" [4] pry(#<VagrantPlugins::OVirtProvider::Action::StartVM>)> vm_configuration[:placement_policy] = { :hosts => [{ :host => host }]} ==> default: An error occured. Recovering.. ==> default: Halting VM... ==> default: Waiting for VM to shutdown... ==> default: Removing VM... /home/myoung/.rvm/gems/ruby-2.2.3/gems/ovirt-engine-sdk-4.1.2/lib/ovirtsdk4/service.rb:52:in `raise_error': Fault reason is "Incomplete parameters". Fault detail is "Host [id|name] required for validateAndUpdateHostsInPlacementPolicy". HTTP response code is 400. (OvirtSDK4::Error) from /home/myoung/.rvm/gems/ruby-2.2.3/gems/ovirt-engine-sdk-4.1.2/lib/ovirtsdk4/service.rb:85:in `check_action' from /home/myoung/.rvm/gems/ruby-2.2.3/gems/ovirt-engine-sdk-4.1.2/lib/ovirtsdk4/services.rb:29460:in `start'