ReadMeFeed / Community knowledge
Real questions. Useful conversations. Find the people who know your stack.
Cloud & infrastructure · #openstack
Resolve 'No valid host found' errors in OpenStack Nova by diagnosing scheduler filters, auditing Placement API inventory, and tuning overcommit ratios.
A decision guide that outlines constraints, compares OVS and Linux Bridge, explains trade‑offs, and provides a minimal validation workflow for selecting the right Neutron network backend.
Learn how to prevent 'noisy neighbor' syndrome in OpenStack by using Cinder Volume Types and QoS specifications to enforce IOPS and throughput limits.
Guide to deploying OpenStack Nova Cells v2 for multi‑cell compute scaling, including prerequisites, cell creation, service mapping, validation steps, and recovery options.
Move running OpenStack instances between compute hosts without downtime by placing disk images on shared storage accessible to every node.
Learn how to make an OpenStack instance reachable from outside by allocating and associating a floating IP through a Neutron L3 router, with a step‑by‑step CLI example and notes on limits.
Learn how to use OpenStack Cinder Volume Types and QoS specs to cap IOPS, prevent noisy-neighbor contention, and verify where enforcement actually happens.
Why Nova reports 'No valid host was found': triage compute services, Placement inventory drift, scheduler filter rejections, cell mapping, and image reachability.
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.