WIP DNM Allow OpenStack access from the outside

[tomassedovic]

This sets the HOST_IP value of Devstack to the floating IP address. That should in theory allow the OpenStack to be accessed from the outside.

What happens in practice is that ./stack.sh fails on teh Ceph plugin with:

# ceph --verbose -c /etc/ceph/ceph.conf osd create
parsed_args: Namespace(admin_socket=None, cephconf='/etc/ceph/ceph.conf', client_id=None, client_name=None, cluster=None, cluster_timeout=None, completion=False, help=False, input_file=None, output_file=None, output_format=None, setgroup=None, setuser=None, status=False, verbose=True, version=False, watch=False, watch_channel='cluster', watch_debug=False, watch_error=False, watch_info=False, watch_sec=False, watch_warn=False), childargs: ['osd', 'create']
2020-01-20 17:00:11.642674 7f11f7f54700  0 monclient(hunting): authenticate timed out after 300
2020-01-20 17:00:11.642755 7f11f7f54700  0 librados: client.admin authentication error (110) Connection timed out
[errno 110] error connecting to the cluster

I have not yet figured out how to fix that.

[tomassedovic]

Okay, we need to update /etc/ceph/ceph.conf to set public_addr and mon_host to the server's fixed IP address (i.e. the private one).

Devstack already configures mon_host but sets it to the floating IP. That on its own doesn't work and trying to set public_addr to the floating IP is not working either.

Setting them to the private IP works at least for the ceph osd create command.