Compute node requirements

Compute nodes run virtual machine instances on bare-metal systems that support hardware virtualization. Ensure your Compute nodes have sufficient resources to support the virtual machine instances that they host.

Note

Red Hat OpenStack Services on OpenShift (RHOSO) 18.0 does not support using QEMU architecture emulation.
Processor
64-bit x86 processor with support for the Intel 64 or AMD64 CPU extensions, and the AMD-V or Intel Virtualization Technology (Intel VT) hardware virtualization extensions enabled. The processor has a minimum of 4 cores.
Memory

A minimum of 6 GB of RAM for the host operating system, plus additional memory to accommodate for the following considerations:

  • Add additional memory that you intend to make available to virtual machine instances.
  • Add additional memory to run special features or additional resources on the host, such as additional kernel modules, virtual switches, monitoring solutions, and other additional background tasks.
  • If you intend to use non-uniform memory access (NUMA), you should designate 8GB per CPU socket node or 16 GB per socket node if you have more than 256 GB of physical RAM.
  • Configure at least 4 GB of swap space.

For more information about planning for Compute node memory configuration, seeConfigure Compute nodes and instance provisioning.

Disk space
A minimum of 50 GB of available disk space.
Network Interface Cards
A minimum of one 1 Gbps Network Interface Cards for testing, and a minimum of two NICs in a production environment. Use additional network interface cards for bonded interfaces or to delegate tagged VLAN traffic.
Platform management
Compute nodes that are installer-provisioned require a supported platform management interface, such as an Intelligent Platform Management Interface (IPMI) functionality, on the server system board. This interface is not required for pre-provisioned nodes.