Open Stack

If it is not going to nova-compute, it must be thrown out directly at nova-api due to any of the following reasons:

1.       No valid host to launch the instance: Though you can see free memory on the compute node, but it does check for few more things: disk space and CPU. Please note that the disk space being looked at is the theoretical value.

2.       The instance flavor type is incorrect. The image uploaded might have not been specified the right correct min. disk and min. memory needs. So, if you use tiny flavor and the image really requires more than 2 GB of root, it is going to fail.

You may like to run the following command:
nova hypervisor-stats

Regards~hrushi

From: Vikash Kumar [mailto:vikash.kumar at oneconvergence.com]
Sent: Monday, July 07, 2014 9:13 PM
To: Openstack Milis; openstack-dev
Subject: [Openstack] [Nova] Launch of VM failed after certain count openstack Havana

Hi all,
    I am facing issue with VM launch. I am using openstack Havana. I have one compute node with following specification:

root at compute-node:~# lscpu
Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    1
Core(s) per socket:    4
Socket(s):             2
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 15
Stepping:              7
CPU MHz:               1995.104
BogoMIPS:              3990.02
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              4096K
NUMA node0 CPU(s):     0-7

root at compute-node:~# free -h
             total       used       free     shared    buffers     cached
Mem:           15G       1.5G        14G         0B       174M       531M
-/+ buffers/cache:       870M        14G
Swap:          15G         0B        15G

But I am not able to launch more than 12-14 VM. VM launch fails. Even I don't see ERROR logs in any of nova logs on both openstack controller and compute node. Don't see any request coming to compute node also. I just tailed nova compute logs on compute node. As soon as, I clean the previous VMs , everything works fine. I have never observed this with Grizzly.

Regards,
Vikash

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