[joshribakoff]

The whole premise behind letsencrypt is the ACME protocol, so you don't have to manually renew certs [although you can]. The problem is in handling SSL renewals on a cluster, you have to do renewals via DNS & rsync certs around, and there's not many tools to do this. But for a single server, its very easy to automate. Another problem with letsencrypt is the rate limits & such.

[bckygldstn]

Google App Engine only a few weeks ago released an API for managing certificates. Before that, the only way to add or update a certificate was to manually paste the key into a web form.

[andy_ppp]

If using docker you can mount a volume to your let’s encrypt certs on all your frontend servers.