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[Brian Haley <1809080@xxxxxxxxxxxxxxxxxx>]

** Changed in: neutron
       Status: New => Won't Fix

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https://bugs.launchpad.net/bugs/1809080

Title:
  reload_cfg doesn't work correctly

Status in neutron:
  Won't Fix

Bug description:
  class ProcessManager[1] is used to managed processes in neutron agents. The reload_cfg function is used to reload configuration by sending HUB signal to the target process. This may work for a linux system administrator, where she/he updates the config file and then sends HUP signal to reload.
  But in openstack, this is a bit different. I have read the code about dnsmasq[2] and haproxy. The parameters and config files are generated by a callback function. This function generates config files and return the command(with parameters). Sending HUP signal doesn't change parameters, neither regenerate config files.

  I would suggest another way to reload/restart process which makes sure
  the callback function is called.

  [1] https://github.com/openstack/neutron/blob/8c59cfe98eb15f024b6c24312c0bf51af02a5dc3/neutron/agent/linux/external_process.py#L50
  [2] https://github.com/openstack/neutron/blob/8c59cfe98eb15f024b6c24312c0bf51af02a5dc3/neutron/agent/linux/dhcp.py#L457-L458

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