Open Stack

error: sudo nova-rootwrap /etc/nova/rootwrap.conf mount /dev/nbd11 /tmp/openstack-vfs-localfsJ1DbZS

you could try to mount it manually to find out what happend. and in the nova-compute.log ,there would be qemu-img and qemu-nbd commands, you shall pay attention to them.

qemu-img create -fqcow2 -o backing-file= /PATH_TO_DISK_FILE
qemu-nbd -c /deb/nbdX /PATH_TO_DISK_FILE


------------------ Original ------------------
From:  "Liu Wenmao";<marvelliu at gmail.com>;
Date:  Wed, Nov 20, 2013 10:52 AM
To:  "openstack"<openstack at lists.openstack.org>; 

Subject:  [Openstack] unable to resize nova instance



hi all:


I want to change flavor of an existing nova instance in horizon web, but nova-compute encounters the following error:

 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
  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.
  4019 Command: sudo nova-rootwrap /etc/nova/rootwrap.conf mount /dev/nbd11 /tmp/openstack-vfs-localfsJ1DbZS
 4020 Exit code: 32
 4021 Stdout: ''
 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
  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.
  4024 Command: sudo nova-rootwrap /etc/nova/rootwrap.conf mount /dev/nbd11 /tmp/openstack-vfs-localfsJ1DbZS
 4025 Exit code: 32
 4026 Stdout: ''
 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
 

my openstack(havana) is installed in ubuntu 12.04, 
root at node1:~# dpkg -l|grep kvm
ii  kvm                                 1:84+dfsg-0ubuntu16+1.0+noroms+0ubuntu14.12 dummy transitional package from kvm to qemu-kvm
 ii  kvm-ipxe                            1.0.0+git-3.55f6c88-0ubuntu1                PXE ROM's for KVM
ii  qemu-kvm                            1.0+noroms-0ubuntu14.12                     Full virtualization on i386 and amd64 hardware
 

Is it a nova bug, or my configuration error?



Thanks



Liu Wenmao
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