Bug 1042400 - [RFE][neutron]: Quantum Multi-host DHCP and L3
Summary: [RFE][neutron]: Quantum Multi-host DHCP and L3
Keywords:
Status: CLOSED UPSTREAM
Alias: None
Product: Red Hat OpenStack
Classification: Red Hat
Component: RFEs
Version: unspecified
Hardware: Unspecified
OS: Unspecified
unspecified
medium
Target Milestone: ---
: ---
Assignee: RHOS Maint
QA Contact:
URL: https://blueprints.launchpad.net/neut...
Whiteboard: upstream_milestone_next upstream_stat...
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2013-12-12 22:09 UTC by RHOS Integration
Modified: 2015-11-20 19:24 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: Enhancement
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-03-19 17:18:16 UTC
Target Upstream Version:


Attachments (Terms of Use)

Description RHOS Integration 2013-12-12 22:09:06 UTC
Cloned from launchpad blueprint https://blueprints.launchpad.net/neutron/+spec/quantum-multihost.

Description:

Goal here is to have a DHCP implementation that provides the same properties as nova-network's "multi_host" functionality, where the DHCP server for a particular VM runs directly on the same hypervisor as the VM itself (with the exception of when a VM migrates). 

The main goal of this approach is that you don't need to worry about providing HA for a centralized DHCP agent. 

Note: the downside of this approach is that each DHCP instance consumes an IP, meaning it can reduce the number of available IPs on a subnet (i.e., it probably makes sense to double or triple the size of the subnet when using multi_host, assuming subnets are using "free" RFC 1918 space). 

Specification URL (additional information):

https://docs.google.com/document/d/1Y41g-POd3DLmtFnD6JfKFDvZJikbUvsL0wIi8LFD35U/edit?usp=sharing


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