Update HAProxy Lets Encrypt

cert_renew.sh

#!/bin/bash

cert_name="generic_cert"
haproxy_cert_dir="/etc/haproxy/certs"
email="<your_email>"

domains=""
for domain in "$@"
do
  domains+="-d $domain "
done

certbot certonly --standalone --agree-tos --non-interactive \
-m $email --preferred-challenges http \
--http-01-port 9785 --cert-name $cert_name \
--renew-with-new-domains --keep-until-expiring $domains

# Combine the certificate chain and private key and put it
# into the correct HAProxy directory
cd /etc/letsencrypt/live/$cert_name
cat fullchain.pem privkey.pem > "$haproxy_cert_dir/cert.pem"

echo "Reloading haproxy"
sudo systemctl reload haproxy