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The High Availability of Dhcp agent :
just modify the neutron.conf:
dhcp_agents_per_network = X

But about the High Availability of l3 agent, keepalived vrrp/conntrackd + dvr can do it.

High availability features will be implemented as extensions or drivers.A first extension/driver will be based on VRRP.
A new scheduler will be also added in order to be able to spawn multiple instances of a same router in many places.
Conntrackd will be used to maintain the TCP sessions going through the router. One instance of conntrackd per virtual router, then one per namespace.

Blueprints:  https://blueprints.launchpad.net/neutron/+spec/l3-high-availability
wiki:        https://wiki.openstack.org/wiki/Neutron/L3_High_Availability_VRRP


发件人: Chinasubbareddy M [mailto:chinasubbareddy_m at persistent.com]
发送时间: 2015年1月29日 14:17
收件人: Vikash Kumar; Openstack Milis; openstack-dev
主题: Re: [Openstack] [openstack-dev] Openstack Network Node High Availability [openstack]

Hi,

As per my knowledge DVR is to avoid neutron node as an single point of failure and distribute l3 operations across compute nodes.

HA for L3 agents is working from Juno but it will be on active/passive mode, only one l3 will be on active at a time .

Subbareddy,
Persistent systems ltd.

From: Vikash Kumar [mailto:vikash.kumar at oneconvergence.com]
Sent: Thursday, January 29, 2015 11:32 AM
To: Openstack Milis; openstack-dev
Subject: Re: [Openstack] [openstack-dev] Openstack Network Node High Availability [openstack]

Is DVR a possible way to some extent(loosely)  to address HA of l3 agents ?

On Thu, Jan 29, 2015 at 11:08 AM, Vikash Kumar <vikash.kumar at oneconvergence.com<mailto:vikash.kumar at oneconvergence.com>> wrote:
Hi,
    Is there any work going on High Availability of Network Node or is there any existing work? I see doc. on running multiple dhcp agent on multiple node but do not got on l3 agent. Is there any doc having details of running multiple dhcp agents on multiple hosts?

--
Regards,
Vikash

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--
Regards,
Vikash

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