Softraid support4/18/2023 Remain functional in the event of a single disk failure. Provides exactly the right amount of functionality for Kayobe'sĪ RAID-1 device was selected for the OS so that the hypervisor would However, the current driver implementation To develop instance-driven RAID configurations is not yetĪvailable for software RAID. RAID configuration, applied whenever a node is cleaned and used forĪll instance deployments. A bare metal node is assigned a persistent software In its initial implementation, the software RAID capability isĬonstrained. The CERN team have documented the software RAID support on their tech blog. Recent work led by CERN has contributed software RAID support OS “black box” becomes a white box in exceptional cases such as Without losing Ironic's generalised capability, the guest Supporting Linux software RAID would be a limitation for the primary Software RAID implementation is Linux-specific. The abstractions of virtualisationĭemand that the guest OS is treated like a black box, but the This requirement exemplifies the inherent Linux servers are often deployed with their root filesystem on a Thankfully, Ironic developed a software-based alternative. The hardware RAID controller was unusable. Taking these and other factors into account, it was decided that The driver was not just requiredįor administering the controller, but for mounting the RAID volumes. The RAID controller required a proprietary kernel driver which was notĪvailable for recent CentOS releases.The hardware RAID controller needed to be enabled via the BIOS, but theīIOS administration tool failed on many nodes because the 'personalityīoard' had failed, preventing the tool from retrieving the server model.To meet the workload requirements these are provisionedĪs two RAID volumes - one mirrored (for the OS) and one stripedĮach node also has a hardware RAID controller, and standard practice Nodes and a transfer of control to OpenStack management. This journey began with some older-generation HPE SL230 compute Ansible provides a consistent interface toĮverything, from the physical layer to the application workloads Using Kayobe, a project that integrates Ironic (for hardwareĭeployment) and Kolla-Ansible (for OpenStack deployment), all withinĪn Ansible framework. The OpenStack infrastructure is deployed and configured ION is migrating on-premise HPC infrastructure into an OpenStack Multiple hardware configurations can be a challenge. Providing a consistent software environment across Field failures and replacements add furtherĭivergence. In several generations of hardware being active within the productionĮnvironment at any time. Infrastructure, and operates a phased procurement model that results In the data centre to whack a machine with a large stick).Īs a leader in the seismic processing industry, ION Geophysical maintains a hyperscale production HPC In the face of unreliability (minimising the need to ask someone Mantra of agility, accelerates the interactions with hardware Software-defined infrastructure, the method underpinning the modern Little hairy, never as predictable or reliable as expected. So much for the theory: working with hardware has always been a To define the provisioning of bare metal infrastructure in the Thus far, thatĪutomation has evolved in domain-specific ways, loaded with simplifyingĪssumptions that enable large-scale infrastructure to be provisionedĪnd managed from a minimal service. To ensure repeatability, scalability and efficiency. Automation becomes essential beyond trivial numbers of systems Has included deploying bare metal machines, sometimes at large To exist, Ironic must provide pure abstractions,īut to succeed it must also offer real-world circumventions.įor decades the conventional role of an HPC system administrator However, bare metal is wrapped up in hardware-definedĬoncrete: devices and configurations that have no equivalent in Introduces ever more inventive implementations of the abstractions OpenStack Ironic operates in a curious world.
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