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2016-12-02 00:26:52 -0500 answered a question In booting an instance on Compute node, what to do with 'authentication'?

The issue is enough disk space unavailability.

2014-09-11 23:30:30.436 901 WARNING nova.scheduler.host_manager [req-a452c062-a105-44da-8a20-b2417902c657 9a6fb67d19c44b95b299fc0d6007a03e a8c813f2bd9b4d41b895f933bac32c3d] Host has more disk space than database expected (4gb > 1gb)

The instance you are trying to create has a disk space of 4 gb, try making it with a lesser disk space.

2016-12-02 00:21:55 -0500 answered a question How to authenticate and use a nova service using curl for a openstack end user ?

You must specify the openstack user with "-u" option. The you will be prompted for the password to enter.

2016-12-02 00:15:04 -0500 answered a question Ubuntu VM - In google chrome no microphone or video is showing. Any idea why?

I had a similar problem when i was trying to run cisco webex on a vm. My issue was that the application could only be run on a 64 bit browser while i was running the 32-bit VM.

In your case, you can check whether the resources are even available to the VM or not. It can be the issues because of the hypervisor you are using.

The other problem can be that version compatibility, that was in my case.

2016-12-02 00:08:24 -0500 answered a question Restart devstack services

Which version are you using? If its an older release, you can either download the rejoin-stack file from some previous openstack release/version

OR

you can stop it by running unstack.sh and then start it again with stack.sh

2016-11-16 01:37:55 -0500 answered a question Why we need to integrate contrail with openstack ? does it provide any extra features than neutron ?

Basically the Contrail is to replace the Neutron in Openstack. Contrail is highly scalabe where the Openstack-Neutron will panic. Following video provides a glance of networking scalability using Contrail. Have a look.

https://www.youtube.com/watch?v=xN0rXHD_dqk (https://www.youtube.com/watch?v=xN0rX...)