A Docker image for obtaining Let's Encrypt SSL certificates for Cloudflare domains using dehydrated and kappataumu/letsencrypt-cloudflare-hook.
In order to use this image, you must expose your Cloudflare account's email and API key in the environment as the CF_EMAIL and CF_KEY, and then mount /dehydrated/certs to where you want your SSL certs to go.
$ docker create -v /etc/ssl/certs:/dehydrated/certs -v /dehydrated/accounts --name dehydrated-data timdumol/docker-dehydrated-cloudflare
$ docker run --rm -e CF_EMAIL='user@example.com' -e CF_KEY=AbCd12345678 --volumes-from dehydrated-data timdumol/docker-dehydrated-cloudflare --register --accept-terms
$ docker run --rm -e CF_EMAIL='user@example.com' -e CF_KEY=AbCd12345678 --volumes-from dehydrated-data timdumol/docker-dehydrated-cloudflare --cron -d www.example.com
You can also use the environment variable CF_DNS_SERVERS to specify the DNS servers to be used for propagation checking, and CF_DEBUG=true to see more details about the hook's execution. Configuration for dehydrated is also available by setting the appropriate environemnt variable (see config.tmpl for the full list of variables):
$ docker run --rm -e CONTACT_EMAIL='user@example.com' -e CF_EMAIL='user@example.com' -e CF_KEY=AbCd12345678 --volumes-from dehydrated-data timdumol/docker-dehydrated-cloudflare --cron -d www.example.com