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Do i need to run devstack everytime?

Friends,

I'm new to the OpenStack and trying to build the environment for testing. I installed DevStack on my Ubuntu VM. I was able to successfully install OpenStack and everything working fine.

My problem is, whenever i reboot the Ubuntu server the horizon dashboard is opening. But some of the functionalists are not working.

Example:

  1. When i click Overview below error message appears

Error: Unable to retrieve usage information.

  1. When i click hypervisor below error message appears Error: Unable to retrieve hypervisor information. Error: Unable to get nova services list. Error: Unable to retrieve hypervisor statistics.

Similarly, i'm getting error message from all menus

But, if i rerun the "stack.sh" everything becomes normal. Is that something the service not running or anything i'm missing?

appreciate your support in this regard

Thanks Baluchen