openstack-ansible/doc/source/install-guide/configure-lbaas.rst

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Configuring the Network Load Balancing Service (Optional)

The OpenStack Networking Service, Neutron, includes a Load Balancer as a Service (LBaaS). This service lets you configure a load balancer that runs outside of your instances and directs traffic to your instances. A common use case is when you want to use multiple instances to serve web pages and want to meet high performance or availability goals.

OpenStack-Ansible currently provides the OpenStack Neutron LBaaS service using HAProxy as the load balancer.

The following procedure describes how to modify the /etc/openstack_deploy/user_variables.yml file to enable LBaaS.

1. Override the default list of Neutron plugins used in order to include neutron_lbaas.services.loadbalancer.plugin.LoadBalancerPlugin:

   neutron_plugin_base:
     - neutron.services.l3_router.l3_router_plugin.L3RouterPlugin
     - neutron.services.metering.metering_plugin.MeteringPlugin
     - neutron_lbaas.services.loadbalancer.plugin.LoadBalancerPlugin

2. Execute the Neutron install playbook in order to update the configuration of the Neutron Agents:

   # cd /opt/openstack-ansible/playbooks
   # openstack-ansible os-neutron-install.yml

3. Execute the Horizon install playbook in order to update the Horizon configuration to show the LBaaS panels:

   # cd /opt/openstack-ansible/playbooks
   # openstack-ansible os-horizon-install.yml

The LBaaS default configuration options may be changed through the conf override mechanism using the neutron_lbaas_agent_ini_overrides dict.

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