After longer investigation it seems for me that our existing scheduler can
already schedule network to the dhcp agents "per segment". If subnet has
segment configured it will filter host candidates per that segment in
https://github.com/openstack/neutron/blob/4381f792c8bd8e5d309ed50288dd4a15a3628e0f/neutron/api/rpc/agentnotifiers/dhcp_rpc_agent_api.py#L205
So this RFE doesn't makes sense really and I'm closing it now.
** Changed in: neutron
Status: New => Won't Fix
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https://bugs.launchpad.net/bugs/1910533
Title:
[RFE] New dhcp agents scheduler - use all agents for each network
Status in neutron:
Won't Fix
Bug description:
Sometimes in multistack spine&leaf topologies, when dhcp agents are
run on compute nodes there is a need to assign each network to be
hosted by all dhcp agents. Otherwise vms spawn on some of the sites
may not get properly configured IP addresses.
Of course this can be done by setting correct number in
"dhcp_agents_per_network" config option but this solution may not
scale well as it needs to be updated everytime when new nodes/sites
are added.
So maybe better option would be to propose new dhcp scheduler class which can
be used in such cases.
This new scheduler would simply always schedule all networks to the all dhcp
agents which it will find in the deployment.
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