This code for auto scaling in openstack Queen, with Ubuntu 16.04
First, you need install python3 to your system
Then, you need run your openstack and reconfig your information to "admin-openrc" and "demo-openrc" file
Finally, run this code with command $sudo bash auto_scale to auto scaling, or run $sudo bash auto_scale_up if you just need the scale up
When you run this code, if the CPU uses more than 80%, openstack will create a new image, if the CPU use less than 20%, openstack will turn off one image