<div dir="ltr"><div><div><div>hi all:<br><br></div>I want to change flavor of an existing nova instance in horizon web, but nova-compute encounters the following error:<br><br> 4017 2013-11-20 10:26:20.980 7475 DEBUG nova.openstack.common.processutils [req-9ef5662e-1215-4c07-9659-b2462387c850 b5565c9bee874a32bbde11f8f910cef9 53707d290204404dbff625378969c25c] Running cmd (subp rocess): sudo nova-rootwrap /etc/nova/rootwrap.conf qemu-nbd -d /dev/nbd11 execute /usr/local/lib/python2.7/dist-packages/nova/openstack/common/processutils.py:147<br>
4018 2013-11-20 10:26:21.082 7475 DEBUG nova.virt.disk.vfs.localfs [req-9ef5662e-1215-4c07-9659-b2462387c850 b5565c9bee874a32bbde11f8f910cef9 53707d290204404dbff625378969c25c] Failed to mount image Fai led to mount filesystem: Unexpected error while running command.<br>
4019 Command: sudo nova-rootwrap /etc/nova/rootwrap.conf mount /dev/nbd11 /tmp/openstack-vfs-localfsJ1DbZS<br> 4020 Exit code: 32<br> 4021 Stdout: ''<br> 4022 Stderr: 'mount: you must specify the filesystem type\n') setup /usr/local/lib/python2.7/dist-packages/nova/virt/disk/vfs/localfs.py:83<br>
4023 2013-11-20 10:26:21.083 7475 DEBUG nova.virt.disk.api [req-9ef5662e-1215-4c07-9659-b2462387c850 b5565c9bee874a32bbde11f8f910cef9 53707d290204404dbff625378969c25c] Unable to mount image /var/lib/no va/instances/60df248b-a4be-48d7-b0d9-764cf097da7a/disk with error Failed to mount filesystem: Unexpected error while running command.<br>
4024 Command: sudo nova-rootwrap /etc/nova/rootwrap.conf mount /dev/nbd11 /tmp/openstack-vfs-localfsJ1DbZS<br> 4025 Exit code: 32<br> 4026 Stdout: ''<br> 4027 Stderr: 'mount: you must specify the filesystem type\n'. Cannot resize. is_image_partitionless /usr/local/lib/python2.7/dist-packages/nova/virt/disk/api.py:183<br>
<br></div>my openstack(havana) is installed in ubuntu 12.04, <br>root@node1:~# dpkg -l|grep kvm<br>ii kvm 1:84+dfsg-0ubuntu16+1.0+noroms+0ubuntu14.12 dummy transitional package from kvm to qemu-kvm<br>
ii kvm-ipxe 1.0.0+git-3.55f6c88-0ubuntu1 PXE ROM's for KVM<br>ii qemu-kvm 1.0+noroms-0ubuntu14.12 Full virtualization on i386 and amd64 hardware<br>
<br></div><div>Is it a nova bug, or my configuration error?<br></div><div><br></div><div>Thanks<br></div><div><br></div>Liu Wenmao<br></div>