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Public bug reported:

dhcp_agents_per_network does not effect when service_plugins config have
segments value

without segments, if dhcp_agents_per_network = 2, the dhcp-agent-
scheduler will choose 2 compute node with neutron-dhcp-agent running to
create q-dhcp namespace and start a dnsmasq process

after add segments value to service_plugins in the neutron.conf then
restart neutron-server, if you choose another compute node that neutron-
dhcp-agent on it but no dnsmasq process running, then restart the
neutron-dhcp-agent service, you will find that the dnsmasq running after
neutron-dhcp-agent service restart.

neutron dhcp-agent-list-hosting-net <network_name>
you will find there are 3 items in the list, but the dhcp_agents_per_network = 2.

** Affects: neutron
     Importance: Undecided
         Status: New


** Tags: dhcp-agent

** Description changed:

- dhcp_agents_per_network does not effect when service_plugins config hae
+ dhcp_agents_per_network does not effect when service_plugins config have
  segments value
  
  without segments, if dhcp_agents_per_network = 2, the dhcp-agent-
  scheduler will choose 2 compute node with neutron-dhcp-agent running to
  create q-dhcp namespace and start a dnsmasq process
  
  after add segments value to service_plugins in the neutron.conf then
  restart neutron-server, if you choose another compute node that neutron-
  dhcp-agent on it but no dnsmasq process running, then restart the
  neutron-dhcp-agent service, you will find that the dnsmasq running after
  neutron-dhcp-agent service restart.
  
- 
  neutron dhcp-agent-list-hosting-net <network_name>
  you will find there are 3 items in the list, but the dhcp_agents_per_network = 2.

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https://bugs.launchpad.net/bugs/1702600

Title:
  dhcp_agents_per_network no effects when using segments service plugin

Status in neutron:
  New

Bug description:
  dhcp_agents_per_network does not effect when service_plugins config
  have segments value

  without segments, if dhcp_agents_per_network = 2, the dhcp-agent-
  scheduler will choose 2 compute node with neutron-dhcp-agent running
  to create q-dhcp namespace and start a dnsmasq process

  after add segments value to service_plugins in the neutron.conf then
  restart neutron-server, if you choose another compute node that
  neutron-dhcp-agent on it but no dnsmasq process running, then restart
  the neutron-dhcp-agent service, you will find that the dnsmasq running
  after neutron-dhcp-agent service restart.

  neutron dhcp-agent-list-hosting-net <network_name>
  you will find there are 3 items in the list, but the dhcp_agents_per_network = 2.

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