Bug 1463837
| Summary: | [RFE][Neutron][NFV][IF4] Scheduler to relate bandwidth per SR-IOV interface to total PF bandwidth | ||
|---|---|---|---|
| Product: | Red Hat OpenStack | Reporter: | JP Jung <jjung> |
| Component: | openstack-neutron | Assignee: | OSP Team <rhos-maint> |
| Status: | NEW --- | QA Contact: | Toni Freger <tfreger> |
| Severity: | low | Docs Contact: | |
| Priority: | high | ||
| Version: | 13.0 (Queens) | CC: | brault, chrisw, djuran, ekuris, jlibosva, srevivo, weiyongjun |
| Target Milestone: | --- | Keywords: | FutureFeature |
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | Type: | Bug | |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | |||
| Bug Blocks: | 1235009, 1624465, 1476902 | ||
We have reviewed this feature request and we won't be able to prioritize it for RHOSP 13 due to other priorities. |
Description of problem: * Some VNF requires the use of SRIOV for dataplane interfaces, specifying also a BW for that interface. The BW required for each interface is a requirement specified in the VNF descriptor. * PCI SRIOV allows multiplexing a single physical interface into several virtual interfaces called Virtual Functions (VF) or SRIOV interfaces. This means that from a single 10G physical interface we should be able to split it in several virtual functions each one consuming a different BW: * Example 1: 4 virtual functions with 5Gbps, 2Gbps, 2Gbps and 1Gbps * Example 2: 10 virtual functions, each one with 1Gbps * The number of VF configured in a physical interface can be high, for instance 64, but the number of actually used VF in a physical interface depends on the actual BW reserved for each VF and the total BW of the physical interface. * When searching a host to deploy a VM, nova scheduler should take into account the amount of BW reserved by the previous VMs on each physical interface. Today, BW is not taken into consideration. * Moreover, BW occupied on each physical interface is an important driver for host selection. It might make sense for nova to have some policy that prefers deploying on a host whose physical interfaces have less available BW in order to make a better use of the network resources.