vpki-proxy is a quick & dirty configurable TLS proxy which uses Let's Encrypt (via rsc.io/letsencrypt) to retrieve certificates for the services. The usage of the vpki library means that it should be trivial to set up vault as a cert provider as well. I intend to do this in the near term.
This proxy will also export Prometheus metrics if an IP prefix is given. This should be extended in the future to allow more flexibility.
go get -u astuart.co/vpki-proxy
See example config for an example configuration.
vpki-proxy -metric-ip="192.168.1.2" config.yml