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As you said, it is a multi node setup. Which physical node is used when
your VM is booting ? And how many disk did  the VM image need when booting
? Those could be the next steps to check.

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2015-01-06 16:56 GMT+08:00 ppnaik <ppnaik at cse.iitb.ac.in>:

> Hi All,
> I have a multi node setup of openstack juno on centos 7. After I
> instantiate multiple VMs and check the nova-compute.log on compute nodes it
> shows a negative value for free disks even though the the physical system
> has a lot of free memory
>
> on the physical system. df -h
>
> Filesystem               Size  Used Avail Use% Mounted on
> /dev/mapper/centos-root   50G  2.0G   49G   4% /
> devtmpfs                  16G     0   16G   0% /dev
> tmpfs                     16G     0   16G   0% /dev/shm
> tmpfs                     16G  281M   16G   2% /run
> tmpfs                     16G     0   16G   0% /sys/fs/cgroup
> /dev/mapper/centos-home  865G   33M  865G   1% /home
> /dev/sda1                494M  137M  358M  28% /boot
>
> nova-compute.log on compute node:
>
> 2015-01-06 11:00:28.756 8123 AUDIT nova.compute.resource_tracker [-] Total
> physical ram (MB): 31911, total allocated virtual ram (MB): 17920
> 2015-01-06 11:00:28.756 8123 AUDIT nova.compute.resource_tracker [-] Free
> disk (GB): -113
> 2015-01-06 11:00:28.757 8123 AUDIT nova.compute.resource_tracker [-] Total
> usable vcpus: 16, total allocated vcpus: 10
>
> What is the issue and how can I resolve it? Please help.
>
> Thanks,
>
> Priyanka
>
>
>
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