Change Citadel Domain

We will use mail as hostname, mail.example.net as our original domain, and mail.example.com as our new domain; and 203.0.113.1 as our public facing IP address on this page for the citadel server. Replace with your own.

Pre-Install

• Before you start set your DNS to point your domain to the servers IP. How to do that is out of this manuals scope.

Next we will set some variables, replace with your domain and IP address then execute following in your servers shell.

export CIT_DOMAIN_ORG=mail.example.net
export CIT_DOMAIN_NEW=mail.example.com

Change your /etc/hosts & lighttpd.conf file replace old with new domain

# Replace text in files
sed -i "s|$CIT_DOMAIN_ORG|$CIT_DOMAIN_NEW|g" /etc/hosts
sed -i "s|$CIT_DOMAIN_ORG|$CIT_DOMAIN_NEW|g" /etc/lighttpd/lighttpd.conf

# Check config file
lighttpd -tt -f /etc/lighttpd/lighttpd.conf

If there is an error at this point check your /etc/lighttpd/lighttpd.conf file. Fix the problem and run last command again.

• No error continue

certbot certonly --agree-tos --non-interactive --text --rsa-key-size 4096 \
	--email webmaster@${CIT_DOMAIN_NEW} \
	--webroot --webroot-path /srv/www/lighttpd \
	--domains ${CIT_DOMAIN_NEW}

• No error continue

sv stop lighttpd

• No error continue

cp /etc/letsencrypt/live/${CIT_DOMAIN_NEW}/privkey.pem /usr/local/citadel/keys/citadel.key 
cp /etc/letsencrypt/live/${CIT_DOMAIN_NEW}/fullchain.pem /usr/local/citadel/keys/citadel.cer

• No error continue

docker stop citadel
wait
docker rename citadel citadel.net

• No error continue

docker run -d --restart=unless-stopped --network host \
    --volume=/usr/local/citadel:/citadel-data \
    --volume=/usr/local/webcit/.well-known:/usr/local/webcit/.well-known \
    --volume=/usr/local/webcit/static.local:/usr/local/webcit/static.local \
    --name=citadel citadeldotorg/citadel --http-port=8080 --https-port=8443

• No error continue

sv start lighttpd

• Last we change the certbot post renewal hook

sed -i "s|$CIT_DOMAIN_ORG|$CIT_DOMAIN_NEW|g" /etc/letsencrypt/renewal-hooks/post/citadel.sh

All done check your new setup.
If you have a problem ask questions at Citadel Support