Comment 2 for bug 1655605

I observed the following log fyi.

journalctl -l -u neutron-dhcp-agent.service -f

#create metadata proxy process 15975
Jan 11 05:16:07 perry1-controller-1 sudo[15977]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/local/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ip netns exec qdhcp-125373bc-aae2-4ff0-a484-b551ce557c94 neutron-ns-metadata-proxy --pid_file=/var/lib/neutron/external/pids/125373bc-aae2-4ff0-a484-b551ce557c94.pid --metadata_proxy_socket=/var/lib/neutron/metadata_proxy --network_id=125373bc-aae2-4ff0-a484-b551ce557c94 --state_path=/var/lib/neutron --metadata_port=80 --metadata_proxy_user=982 --metadata_proxy_group=979 --debug --log-file=neutron-ns-metadata-proxy-125373bc-aae2-4ff0-a484-b551ce557c94.log --log-dir=/var/log/neutron

Jan 11 05:16:08 perry1-controller-1 sudo[16000]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/local/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ip netns exec qdhcp-125373bc-aae2-4ff0-a484-b551ce557c94 ip addr show ns-8c9996eb-f7

#it checked and thoughts the subnet is not isolated, so it tried to kill the process of metadata proxy 15975
Jan 11 05:16:08 perry1-controller-1 sudo[16007]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/local/bin/neutron-rootwrap /etc/neutron/rootwrap.conf kill -HUP 15975
Jan 11 05:16:09 perry1-controller-1 dnsmasq[15975]: read /var/lib/neutron/dhcp/125373bc-aae2-4ff0-a484-b551ce557c94/addn_hosts - 3 addresses
Jan 11 05:16:09 perry1-controller-1 dnsmasq-dhcp[15975]: read /var/lib/neutron/dhcp/125373bc-aae2-4ff0-a484-b551ce557c94/host
Jan 11 05:16:09 perry1-controller-1 dnsmasq-dhcp[15975]: read /var/lib/neutron/dhcp/125373bc-aae2-4ff0-a484-b551ce557c94/opts
Jan 11 05:16:09 perry1-controller-1 sudo[16013]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/local/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ip netns exec qdhcp-125373bc-aae2-4ff0-a484-b551ce557c94 ip route list dev ns-8c9996eb-f7
Jan 11 05:16:09 perry1-controller-1 sudo[16019]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/local/bin/neutron-rootwrap /etc/neutron/rootwrap.conf kill -9 15999
Jan 11 05:16:09 perry1-controller-1 sudo[16023]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/local/bin/neutron-rootwrap /etc/neutron/rootwrap.conf ip netns exec qdhcp-125373bc-aae2-4ff0-a484-b551ce557c94 ip addr show ns-8c9996eb-f7
Jan 11 05:16:10 perry1-controller-1 sudo[16028]: neutron : TTY=unknown ; PWD=/ ; USER=root ; COMMAND=/usr/local/bin/neutron-rootwrap /etc/neutron/rootwrap.conf kill -HUP 15975
Jan 11 05:16:10 perry1-controller-1 dnsmasq[15975]: read /var/lib/neutron/dhcp/125373bc-aae2-4ff0-a484-b551ce557c94/addn_hosts - 3 addresses
Jan 11 05:16:10 perry1-controller-1 dnsmasq-dhcp[15975]: read /var/lib/neutron/dhcp/125373bc-aae2-4ff0-a484-b551ce557c94/host
Jan 11 05:16:10 perry1-controller-1 dnsmasq-dhcp[15975]: read /var/lib/neutron/dhcp/125373bc-aae2-4ff0-a484-b551ce557c94/opts