Red Hat SummitChapter 1. Bare Metal Provisioning service (ironic) functionality
You can use the Bare Metal Provisioning service (ironic) components to provision and manage physical machines directly on physical hardware as bare-metal instances.
The Bare Metal Provisioning service interacts with the following Red Hat OpenStack Services on OpenShift (RHOSO) services:
- The Compute service (nova) provides scheduling, tenant quotas, and a user-facing API for managing virtual machine instances.
- The Identity service (keystone) provides request authentication and helps to locate the other RHOSO services.
- The Image service (glance) manages disk and instance images and image metadata.
- The Networking service (neutron) provides DHCP and network configuration, and provisions the virtual or physical networks that instances connect to when they power on.
The Object Storage service (swift) exposes temporary image URLs for some drivers.
- Bare Metal Provisioning service components
-
The Bare Metal Provisioning service consists of services, named
ironic-<service>, which include the following: - Bare Metal Provisioning API (
ironic-api) - This service provides the external REST API to users. The API sends application requests to the Bare Metal Provisioning conductor over remote procedure call (RPC).
- Bare Metal Provisioning conductor (
ironic-conductor) - This service uses drivers to perform the following bare-metal node management tasks:
- Adds, edits, and deletes bare-metal nodes.
- Powers bare-metal nodes on and off with IPMI, Redfish, or other vendor-specific protocol.
Provisions, deploys, and cleans bare metal nodes.
- Bare Metal Provisioning inspector (
ironic-inspector) - This service discovers the hardware properties of a bare-metal node that are required for scheduling bare-metal instances, and creates the Bare Metal Provisioning service ports for the discovered ethernet MACs.
- Bare Metal Provisioning database
- This database tracks hardware information and state.
- Bare Metal Provisioning agent (
ironic-python-agent) -
This service runs in a temporary RAM disk to provide
ironic-conductorandironic-inspectorservices with remote access, hardware control, and hardware introspection. - Provisioning a bare-metal instance
You can configure the Bare Metal Provisioning service to use PXE, iPXE, or virtual media to provision physical machines as bare-metal instances:
When you use PXE or iPXE, the Bare Metal Provisioning service provisions the bare-metal instances over the network when they power on.
When you use virtual media the Bare Metal Provisioning service provisions the bare-metal instances by creating a temporary ISO image and requesting the Baseboard Management Controller (BMC) to use that image.
- Bare Metal Provisioning inspector (
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