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Cloud & infrastructure · #openstack
Learn how to move running VMs between compute nodes using OpenStack live migration, what prerequisites are needed, and how to verify success.
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.
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.
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.
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.
Learn how OpenStack Nova live migration works, what prerequisites you need, and a step‑by‑step example to move a running VM with minimal downtime.
Step‑by‑step diagnostic guide for OpenStack Nova instances that stall in spawning or error state, with checks, fixes, and escalation rules.
Decision guide comparing legacy PCI passthrough aliases vs. Placement-based scheduling with custom resource classes and traits for GPUs, FPGAs, and SmartNICs in OpenStack Nova. Includes concrete implementation steps, validation commands, and operational trade-offs.
Neutron DVR moves L3 routing to compute nodes, eliminating the east-west traffic bottleneck. Learn the data-plane changes, OVS/OVN configuration, and the control-plane trade-offs for scaling.