Saving debug log to /var/log/letsencrypt/letsencrypt.log
Missing command line flag or config entry for this setting:
You have an existing certificate that contains a portion of the domains you requested (ref: /etc/letsencrypt/renewal/smokeping.my_personal_domain.com.conf)

It contains these names: smokeping.my_personal_domain.com

You requested these names for the new certificate: smokeping.my_personal_domain.com, pi-hole.my_personal_domain.com.

Do you want to expand and replace this existing certificate with the new certificate?

(You can set this with the --expand flag)
Ask for help or search for solutions at https://community.letsencrypt.org. See the logfile /var/log/letsencrypt/letsencrypt.log or re-run Certbot with -v for more details.

name="letsencrypt"
email="hentgi@my_personal_domain.com"
image="serversideup/certbot-dns-cloudflare:latest"
domains="smokeping.my_personal_domain.com"
token="blah"

    docker run \
     -d \
     --rm \
     --name $name \
     -e PUID=1000 \
     -e PGID=1000 \
     -e CERTBOT_DOMAINS="$domains" \
     -e CERTBOT_EMAIL="$email" \
     -e CLOUDFLARE_API_TOKEN="$token" \
     -v /home/henti/docker/letsencrypt:/etc/letsencrypt \
     -v /home/henti/docker/letsencrypt/log:/var/log/letsencrypt \
     $image

domains="smokeping.my_personal_domain.com,pi-hole.my_personal_domain.com"

Let's Encrypt, shall we?
-----------------------------------------------------------
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Requesting a certificate for smokeping.my_personal_domain.com and pi-hole.my_personal_domain.com
Waiting 10 seconds for DNS changes to propagate

Successfully received certificate.
Certificate is saved at: /etc/letsencrypt/live/smokeping.my_personal_domain.com/fullchain.pem
Key is saved at:         /etc/letsencrypt/live/smokeping.my_personal_domain.com/privkey.pem
This certificate expires on 2025-08-08.
These files will be updated when the certificate renews.
NEXT STEPS:
- The certificate will need to be renewed before it expires. Certbot can automatically renew the certificate in the background, but you may need to take steps to enable that functionality. See https://certbot.org/renewal-setup for instructions.