Neutron is made up of five daemons, as shown in Figure 6.1.
Figure 6.1: High-level view of Neutron architecture
- neutron-server: The API and primary gateway to Neutron. One must interact with neutron-server to create, list, delete, and manage networks and other network resources.
- neutron-dhcp-agent: Provides DHCP services to DHCP-enabled Neutron subnets. Behind the scenes, neutron-dhcp-agent actually uses dnsmasq, the popular lightweight DHCP server software, within a network namespace. Network namespaces are a feature of the Linux kernel and partition the use of the network, allowing segregation of network resources despite similar IP address ranges.
- neutron-l3-agent: Creates Neutron routers. Behind the scenes, Neutron routers are network namespaces with unique routing tables and iptables rules.
- neutron-metadata-agent: Provides metadata services to instances...
