DHCP Service LoadBalancing Scheduler

DHCP Service LoadBalancing Scheduler

In this blueprint, we also propose to write a generic scheduler
framework which can be used to schedule a new resource on
selected least loaded agents.
Currently dhcp_load_type will be fetched from neutron.conf file
and corresponding load is obtained by the agent report state.
The obtained load will be populated in the "load" column of the
agents table.
During scheduling, agent will be selected based on sorting all
the agents of particular type based on load column.
Example dhcp_load_type is networks

DocImpact

Implements: blueprint dhcpservice-loadbalancing

Change-Id: I5ec8adf0c4336f885d603662223caa7694708876
Author: Shivakumar M <shiva.kum.m@hp.com>
Co-Authored-By: Praveen Kumar SM <praveen-sm.kumar@hp.com>
Co-Authored-By: Benjamin GRASSART <benjamin.grassart@thalesgroup.com>
Co-Authored-By: Sourabh Patwardhan <sopatwar@cisco.com>