Deploying OpenStack Nova Cells v2 for Multi‑Cell Compute Scaling
Guide to deploying OpenStack Nova Cells v2 for multi‑cell compute scaling, including prerequisites, cell creation, service mapping, validation steps, and recovery options.
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openstackLive Migrate OpenStack Nova Instances Using Shared Storage
Move running OpenStack instances between compute hosts without downtime by placing disk images on shared storage accessible to every node.
OpenStack Nova 'No Valid Host Was Found': A Scheduling Failure Triage Guide
Why Nova reports 'No valid host was found': triage compute services, Placement inventory drift, scheduler filter rejections, cell mapping, and image reachability.
Live Migration in OpenStack: Moving Running VMs Without Downtime
Learn how OpenStack Nova live migration moves a running VM between hosts with little downtime, what configuration is needed, and the key limits to watch for.
Live‑Migrate OpenStack Instances for Zero‑Downtime Maintenance
Learn how to move running VMs between compute nodes using OpenStack live migration, what prerequisites are needed, and how to verify success.
Control Instance Placement with Nova Server Groups
Learn how to create and use affinity/anti‑affinity server groups in OpenStack Nova, verify placement, and understand the trade‑offs and best practices for production deployments.
Diagnosing CPU Pinning Problems on an OpenStack Nova Compute Host
A diagnostic guide for when Nova CPU pinning is silently ignored: how to confirm the symptom, a cause table, ordered checks from flavor to cgroup, version-aware fixes, and when to escalate.
Using Nova Server Groups for Reliable Multi‑Instance Deployment in OpenStack
Learn how to create an anti‑affinity server group, boot instances with a hint, and verify they land on separate compute hosts for true HA resilience.
Live Migration in OpenStack Nova with Shared Storage: A Practical Guide
Learn how to configure, execute, and verify Nova live migration when using NFS or Ceph shared storage, with a step‑by‑step example and notes on CPU compatibility and network limits.