Change FQDN

1) Sign into your node

2) Sign into your domain registrar and update your record with the updated host name
3) Update the FQDN variable

FQDN='FQDN'

Note: you will need to type this command and change 'FQDN' (the value between the quotes ' ') to the value used in the domain registration for your node

4) Update the .bashrc file with the new FQDN

echo "export FQDN=$FQDN" >> $HOME/.bashrc

5) Update your zen.conf by manually editing it with nano

nano ~/.zen/zen.conf

Arrow down to the two lines: tlscertpath and tlskeypath and delete and replace the existing FQDN cert path with your updated FQDN

Save and exit with CTRL+X, type y and hit <enter>

6) Verify your FQDN has fully propagated using: https://www.whatsmydns.net/

Note: Do not proceed until your FQDN has propagated fully

7) Delete the /etc/letsencrypt directory

sudo rm -rd /etc/letsencrypt

8) Re-Issue certificates for your new FQDN and update the certificate trusted store and apply proper file permissions

sudo certbot certonly -n --agree-tos --register-unsafely-without-email --standalone -d $FQDN

sudo cp /etc/letsencrypt/live/$FQDN/chain.pem /usr/local/share/ca-certificates/chain.crt

sudo update-ca-certificates

sudo chown -R root:sudo /etc/letsencrypt/

sudo chmod -R 750 /etc/letsencrypt/

9) Restart zend

sudo systemctl restart zend

10) Check that zend sees a valid TLS certificate (tls_cert_verified": true)

zen-cli getnetworkinfo | grep tls

11) Update the nodetracker configuration

cd ~/nodetracker && node setup.js

When prompted to enter your FQDN, enter the new one and <enter> through all other unchanged fields

12) Restart the tracker and check that the log output is as expected

sudo systemctl restart zentracker && journalctl -fu zentracker

13) Check on the tracker site to verify the new FQDN is in use and that there are no open exceptions