To configure Fabio to use the certificates obtained by Aleff is simply a case of pointing it at the right key in Consul.
With the default Aleff configuration this line is all that's required to configure Fabio:
proxy.addr = :80;proto=http,:443;cs=consul
proxy.cs = cs=consul;type=consul;cert=http://127.0.0.1:8500/v1/kv/certs/active
If you've changed the
KV_CERT_ROOT option you'll need to adjust the Consul URL accordingly.
For further details on configuring Fabio certificate stores, including how to provide an ACL token, see the Fabio documentation.