When installing flatcar on an VM or after changing it’s IP address you will see the following inside Lens

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Instructions (production)

Note: This will cause some downtime

  1. SSH into your server

  2. Execute sudo vi /etc/systemd/system/k3s.service to open the k3s service file in VI

  3. Add ‘—tls-san=YOUR.IP.HERE’ \ to the ExecStart command

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  4. Save and close the file

  5. Execute

    sudo kubectl -n kube-system delete secrets/k3s-serving
sudo mv /var/lib/rancher/k3s/server/tls/dynamic-cert.json /tmp/dynamic-cert.json
sudo systemctl restart k3s

  6. This will delete the old k3s certificate and restart k3s to generate a new one

Instructions (development)

This method is insecure, and should not be used in production

  1. Open the Settings of your Cluster

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  2. Click on the filepath to open an explorer Window

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