Compute

Floating IPs

github.com/gophercloud/gophercloud/openstack/compute/v2/extensions/floatingip is now github.com/gophercloud/gophercloud/openstack/compute/v2/extensions/floatingips
floatingips.Associate and floatingips.Disassociate have been removed.
floatingips.DisassociateOpts is now required to disassociate a Floating IP.

Security Groups

secgroups.AddServerToGroup is now secgroups.AddServer.
secgroups.RemoveServerFromGroup is now secgroups.RemoveServer.

Servers

servers.Reboot now requires a servers.RebootOpts struct:

rebootOpts := &servers.RebootOpts{
        Type: servers.SoftReboot,
}
res := servers.Reboot(client, server.ID, rebootOpts)

Identity

V3

Tokens

Token.ExpiresAt is now of type gophercloud.JSONRFC3339Milli instead of time.Time