OpenStack node types

In the following table, we will describe the node types that constitute an OpenStack cloud:

Type	Description
Controller	The OpenStack controller node is used to perform the control operations in an OpenStack cloud environment. The main components running on a compute node are: Identity service (Keystone) Image service (Glance) Management functions of compute (Nova) Networking (Neutron) Dashboard (Horizon) It may also include the following optional OpenStack components: Block storage Object storage Orchestration Telemetry Besides the preceding core required and optional packages, it also includes some helper packages or applications including: Database (MySQL or other) Network Time Protocol (NTP)
Compute	This is the node which runs the virtual machines in a hypervisor portion. OpenStack uses the KVM hypervisor by default. Besides the hypervisor portion, the compute node also runs the agents for networking services that provide connectivity to internal and external...