> Right, the Neutron L3 agent is the only OpenStack service that is > not stateless, and therefore you cannot use traditional > load-balancing across a set of identical nodes.
Hi jay, how about dhcp-agent? I've went through the bps of neutron for icehouse release. There's no related topics on dhcp-agent. I wonder how to implement the same functionality of dhcp-agent. Thanks very much, Li Ma (Nick) Email: skywalker.n...@gmail.com 2013/12/28 Li Ma <skywalker.n...@gmail.com>: > That's awesome!! I'll try and test the patch for grizzly and also the > new function of icehouse. > > Many thanks, jay. > > > 2013/12/27 Jay Pipes <jaypi...@gmail.com>: >> On 12/26/2013 02:22 PM, Diego Parrilla Santamaría wrote: >>> >>> That's really a nice stuff... >> >> >> So, to wrap up this particular mini-thread... here is the solution: >> >> If on Grizzly or Havana and you don't want use Pacemaker (so that you can >> spread L3 agent load across multiple nodes): >> >> 1) Apply this patch to Neutron: >> >> https://gist.github.com/jaypipes/8135839 >> >> 2) Set the router_scheduler_driver in nova.conf to >> neutron.scheduler.l3_agent_scheduler.LeastUtilizedScheduler >> >> Reference: >> https://github.com/stackforge/cookbook-openstack-network/blob/master/templates/default/neutron.conf.erb#L232 >> >> 3) Put this script into a cron job: >> >> https://github.com/stackforge/cookbook-openstack-network/blob/master/files/default/neutron-ha-tool.py >> >> If you're on Icehouse, simply do: >> >> 1) Set the router_scheduler_driver in nova.conf to >> neutron.scheduler.l3_agent_scheduler.LeastRoutersScheduler >> >> Reference: >> https://github.com/openstack/neutron/blob/master/etc/neutron.conf#L223 >> >> 2) Put this script into a cron job: >> >> https://github.com/stackforge/cookbook-openstack-network/blob/master/files/default/neutron-ha-tool.py >> >> Best, >> -jay >> >>> On Thu, Dec 26, 2013 at 5:58 PM, Jay Pipes <jaypi...@gmail.com >>> <mailto:jaypi...@gmail.com>> wrote: >>> >>> On 12/26/2013 07:43 AM, skywalker.n...@gmail.com >>> <mailto:skywalker.n...@gmail.com> wrote: >>> >>> Hi stackers, >>> I'm preparing for an OpenStack cloud in the production system. >>> I've >>> achieved HA and load balancing for most of the components to a >>> certain >>> degree. >>> Finally I find it hard for Neutron to do such configuration. Are >>> there >>> any ways to run multiple l3-agents and dhcp-agents and cluster >>> them >>> together? >>> >>> >>> Right, the Neutron L3 agent is the only OpenStack service that is >>> not stateless, and therefore you cannot use traditional >>> load-balancing across a set of identical nodes. >>> >>> That said, there's nothing wrong with running multiple L3 nodes, >>> with routers for different tenants hosted on different L3 agents. We >>> do this successfully in our deployment using a custom Neutron >>> scheduler that my colleague Alan Meadows wrote [1] and a Python >>> script (also written by Alan) that runs in cron looking for failures >>> on an L3 agent and if found, moves the routers from the failed node >>> to a working one. [2] >>> >>> The advantage to this vs. something like pacemaker is that you >>> spread the L3 agent workload across many nodes -- accomplishing a >>> sort of poor-man's load balancing/sharding for L3 agent requests. >>> >>> Best, >>> -jay >>> >>> [1] https://gist.github.com/__jaypipes/8135839 >>> <https://gist.github.com/jaypipes/8135839> >>> [2] >>> >>> https://github.com/stackforge/__cookbook-openstack-network/__blob/master/files/default/__neutron-ha-tool.py >>> >>> <https://github.com/stackforge/cookbook-openstack-network/blob/master/files/default/neutron-ha-tool.py> >>> >>> >>> _________________________________________________ >>> Mailing list: >>> http://lists.openstack.org/__cgi-bin/mailman/listinfo/__openstack >>> >>> <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack> >>> Post to : openstack@lists.openstack.org >>> <mailto:openstack@lists.openstack.org> >>> Unsubscribe : >>> http://lists.openstack.org/__cgi-bin/mailman/listinfo/__openstack >>> <http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack> >>> >>> >> >> >> _______________________________________________ >> Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack >> Post to : openstack@lists.openstack.org >> Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > > > > -- > Li Ma (Nick) > > Architect of Stackinsider > > Email: skywalker.n...@gmail.com _______________________________________________ Mailing list: http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack Post to : openstack@lists.openstack.org Unsubscribe : http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack
