I'm configuring Neutron to use ml2 plugin. As described in the official documentation, I set the core_plugins. But when I tried to restart the service neutron-plugin-openvswitch-agent, it prompts
Plugin not recognized: please edit /etc/init.d/neutron-server to select the correct .ini file to load for your plugin [....] Restarting Openstack Neutron OpenVSwitch Plugin Agent: neutron-openvswitch-agentstart-stop-daemon: warning: failed to kill 3166: No such process
so I did. Then when I restart neutron-l3-agent, neutron-dhcp-agent and neutron-metadata-agent services, all of them say
warning: failed to kill xxx: No such process.
What's puzzling is that when I configure the Neutron with network type "local " rather than "gre", the restart of above-mentioned services work and the networks creation works, too.