OpenStack for Architects - Second Edition

Updating the physical architecture design

Once the mapping of services to physical (or virtual) machines has been determined, the design document should be updated to include a definition of the host groups and their associated functions. A simple example is provided as follows:

• Load balancer: These systems provide the load balancing services in an active/passive configuration
• Cloud controller: These systems provide the API services, the scheduling services, and the Horizon dashboard services in an active/active configuration
• Database node: These systems provide the MySQL database services in an active/passive configuration
• Messaging node: These systems provide the RabbitMQ messaging services in an active/active configuration
• Compute node ...