[Openstack] Error While Launching Instance - Could not open backing file. Could not read image for determining its format ; Invalid Argument

[Prashant Sawant]

Hi,

I am trying to launch instance on 2 node Openstack system.
Controller and compute both nodes are on Ubuntu Server 14.04 / intel i5
processor
while booting instance through command prompt as well as from dashboard,
I am getting following error in nova-compute.log

*qemuMonitorOpenUnix : 306 : failed to connect to monitor socket ; no such
a process*
*qemuprocesswaitformonitor : 1915 : internal error : process exited  while
connecting throu*
*Could not open backing file. Could not read image for determining its
format : Invalid Argument*

While launching instance  I can even see following error in syslog file
nbd8: unknown partition table
EXT4-fs (nbd8): VFS: Can't find ext4 filesystem
EXT4-fs (nbd8): VFS: Can't find ext4 filesystem
EXT4-fs (nbd8): VFS: Can't find ext4 filesystem
FAT-fs (nbd8): invalid media value (0x74)
FAT-fs (nbd8): cant find a valid FAT filesystem
block nbd8: NBD_DISCONNECT

the partition table with* fdisk -l *is as below
DeviceBootStartEndBlocks
Id System
/dev/sda1 1 976773167488386583+
  ee GPT

The output of *lsblk *is as below

NAME  MAJ:MINRM  SIZE   RO
   TYPE  MOUNTPOINT
sda  8:0  0 465.8G
0   disk
|-sda1   8:1  0 512M
0part/boot/efi
|-sda2   8:2  0 457.4G
0part/
|-sda3   8:3  0 7.9G
  0part   [SWAP]
|

with *sudo parted* */dev/sda *the output is as below

GNU Parted 2.3
Using /dev/sda
Welcome to GNU Parted! Type 'help'to view list of commands
(parted) p
Model: ATA HGST HTS725050A7 (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/4096B
Partition Table: GPT

NumberStartEnd  SizeFile System  Name
Flags
  1   1049kB538MB  537MBFAT32
boot
  2538MB492GB  491GB  ext4
  3492GB 500GB  8491MB   linux-swap(v1)

(parted)

Please help to resolve the problem. Is it due to GPT partitioning and How
can I make it understand underlying ext4 partition ? Let me know if need to
give any more details.
Thanks in advance
-- 

*-Regards*

*Prof. Prashant Bharat Sawant*

*Asst. Professor,*

*K J Somaiya Institute of Engineering  & IT,*

*Somaiya Ayurvihar Complex, Sion(e), Mumbai*
*Mob. : 9096286742*

-- 

   
   
 
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[Openstack] Error While Launching Instance at nova node

[Prashant Sawant]

Hello every One...

I am facing problem while launchig error in nova.conf file

EXT4-fs (nbd3)L:VFS : cant fine ext4 filesystem
Invalid Media value..


Even though my file system is ext4...

Help me i am stuck here since three week.. I tried tiwse setup for ext4
file format

-- 

*-Regards*

*Prof. Prashant Bharat Sawant*

*Asst. Professor,*

*K J Somaiya Institute of Engineering  & IT,*

*Somaiya Ayurvihar Complex, Sion(e), Mumbai*
*Mob. : 9096286742*

-- 

   
   
 
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