A host is a physical machine that you supply to your PMO cloud as a hypervisor.
Once configured, workloads are then deployed as virtual machines on top of the hosts.
To best utilize your resources in PMO and to run a production setup, you need to configure your hosts to perform specific functions. You do this by assinging different
roles to different hosts.
When you onboard a new host in PMO by installing the PMO agent, the host shows up in the PMO UI as awaiting authorization. At this point, you get the choice of assigning one of the following roles to the host:
- hypervisor - A host with this role will be used by PMO to schedule your virtual machine workloads on.
- image library - A host with this role will be utilized by PMO to host the Glance image library. The host must have sufficient storage avaialble to host virtual machine images. You can create a highly available image library configuration by assigning the image library role to multiple hosts.
- network node - A host with this role will be utilized as a network node. It will get deployed with the required Neutron networking components so that the host can perform routing and other needed functionality. You can configure multiple nodes to have a networking role. Alternatively you can also configure all your hosts with Distributed Virtual Routing (DVR) where each host will act as a router in addition to any other roles that might be assigned to that host.
You can assign more than one role to a host. But for production setup, we recommend that you designate separate sets of hosts for separate roles.