Understanding instance booting

Launching an instance on your OpenStack cloud requires interaction with multiple services. When a user requests a new virtual machine, behind the scenes, the user request must be authenticated, a compute node with adequate resources to host the virtual machine must be selected, requests must be made to the image store to get the correct image for the virtual machine, and all the resources required to launch the virtual machine must be allocated. These resources include network connectivity and storage volume allocation.

Understanding the Nova scheduling process

Nova scheduling is one of the critical steps in the process of launching the virtual machine. It involves the process of selecting the best candidate compute node to host a virtual machine. The default scheduler used for placing the virtual machine is the filter scheduler that uses a scheme of filtering and weighting to find the right compute node for the virtual machine. The scheduling process consists...