so this is the commit that introduced radvd support for ipv6:
https://github.com/openstack/neutron/commit/7f8ae630b87392193974dd9cb198c1165cdec93b
on signal 9 the pid file get's cleaned up, but only on signal 9 (SIGKILL):
https://github.com/openstack/neutron/blob/c33805919eb89f5ea6d8b54d4142d4c829d9a2a0/neutron/agent/linux/external_process.py#L123
so this is the commit that introduced radvd support for ipv6:
https:/ /github. com/openstack/ neutron/ commit/ 7f8ae630b873921 93974dd9cb198c1 165cdec93b
on signal 9 the pid file get's cleaned up, but only on signal 9 (SIGKILL):
https:/ /github. com/openstack/ neutron/ blob/c33805919e b89f5ea6d8b54d4 142d4c829d9a2a0 /neutron/ agent/linux/ external_ process. py#L123