Components

• Controller
• Nova-Compute
• Neutron
• Cinder
• Telemetry
• Heat
• Swift

Controller

• Authenticates users/services as Identity provider
• Provides endpoint for each services

Nova-Compute

• nova-compute actual hypervisor
• nova-scheduler distributes vms across hosts
• nova-vnc and few for console services

Neutron

• Takes care of networking
• SDN-openvswitch, l3-agent,gre
• Flat network-openvswitch/linux bridge
• dhcp-agent
• api-server

SDN

• VPC equivalent
• not directly reachable, vpn/jump box/floating ip needed
• l3-agent HA not readily available, need to use CRM

Flat

• Uses existing network components
• no vpc features
• no extra steps for high availability

Cinder

• Cinder-api centralized server
• cinder-volume movable volumes and mount via iscsci (not redundant/netApp might be the solution)
• cinder-scheduler

Cons

• Multiple moving parts
• Setting up and maintenance will involve lot of automation
• Logging is not proper
• Docker LXC Support

https://wiki.openstack.org/wiki/HypervisorSupportMatrix

Pros

• Exact Replica of amazon aws
• End User migration will be easier
• Better Community Support