# docker-letsencrypt-cron
Create and automatically renew website SSL certificates using the letsencrypt free certificate authority, and its client *certbot*.

# ACME Validation challenge

To authenticate the certificates, the you need to pass the ACME validation challenge. This requires requests made on port 80 to your.domain.com/.well-known/ to be forwarded to this container.

The recommended way to use this image is to set up your reverse proxy to automatically forward requests for the ACME validation challenges to this container.

## Nginx example

If you use nginx as a reverse proxy, you can add the following to your configuration file in order to pass the ACME challenge.

``` nginx
upstream certbot_upstream{
  server certbot:80;
}

server {
  listen              80;
  location '/.well-known/acme-challenge' {
    default_type "text/plain";
    proxy_pass http://certbot_upstream;
  }
}

```

# More information

Find out more about letsencrypt: https://letsencrypt.org

Certbot github: https://github.com/certbot/certbot

# Changelog

### 0.4
- Rip out a bunch of stuff because `@staticfloat` is a monster, and likes to do things his way

### 0.3
- Add support for webroot mode.
- Run certbot once with all domains.

### 0.2
- Upgraded to use certbot client
- Changed image to use alpine linux

### 0.1
- Initial release