Service Chaining and Service Scaling
OpenStack Queens do not support VM-Series firewall deployment
through service chaining or service scaling.
Service chaining is a Contrail feature that deploys a VM-Series
firewall as a service instance in your OpenStack environment. A service chain is a
set of service virtual machines, such as firewalls or load balancers, and each
virtual machine in the service chain is a service instance. Service scaling allows
you to dynamically deploy additional instances of the VM-Series
firewall. Using CPU utilization or incoming bytes per second metrics gathered by
Ceilometer, OpenStack deploys or shuts down additional instances of the VM-Series firewall to meet the current needs of your network.
The VM-Series firewall in OpenStack solution leverages heat
orchestration templates to configure and deploy the components required for service
chaining and service scaling. The heat templates provided by Palo Alto Networks
create a service template, service instance, and service policy (to direct traffic
to the VM-Series firewall) to deploy two Linux servers and the VM-Series firewall service instance between them.