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Certbot Autorenew for HAProxy + OVH DNS

Docker image of certbot, using ovh DNS automation, aimed at updating Haproxy Certificates. This container is designed to update certificates for HAProxy using inotify reload as designed in : acaranta/lbdocker

Container Usage

In order to use this container, there are 2 steps :

  • First use it to generate/create the LetsEncrypt Certificates (manually)
  • Run it to allow for auto Renew

Common parameters

Common parameters wether in certificate creation or autorenew are Certbot mount paths for certificates storage and OVH API:

/etc/letsencrypt
/var/lib/letsencrypt
/etc/ovh

Certificates Creation

To request/create a Certificate, using OVH DNS API, first create ovh.ini as specified here

Then Run your container with the command line :

docker run -it --rm --name certbot \ 
          -v "/volumespath/certbot/etc:/etc/letsencrypt" \ 
          -v "/volumespath/certbot/var/lib:/var/lib/letsencrypt" \ 
          -v /volumespath/certbot/ovh:/etc/ovh \ 
          certbot/dns-ovh certonly \ 
          --dns-ovh --dns-ovh-credentials /etc/ovh/ovh.ini \  
          --dns-ovh-propagation-seconds 60 \ 
          -d <YOURDOMAINCERT2GENERATE>

This will request and generate a certificate for YOURDOMAINCERT2GENERATE and will sotre its configuration in the volumes specified.

Run the autorenew Mode

Once your certificates are generated you can run the container using this docker-compose configuration :

  certbot:
    image: acaranta/certbot-autorenew:latest
    environment:
      - "CERTDIR=/crts"
      - "INTERVAL=7d"
    volumes:
      - /volumespath/certbot/etc:/etc/letsencrypt
      - /volumespath/certbot/var/lib:/var/lib/letsencrypt
      - /volumespath/certbot/ovh:/etc/ovh
      - /volumespath/lbdocker/conf/certs:/crts
    restart: always

Where the Environment Variables passed are :

  • CERTDIR : is the path to where the haproxy certificates will be placed/overwritten once the renew will be done
  • INTERVAL : Interval between renewal attempts by certbot (Default 7D = 7 Days)

This will run certbot every INTERVAL, and will try to renew every Certificates found within the letsencrypt cerbot volumes.