Apologies for the silly question. I am attempting to upgrade my cluster. I have one master and 3 worker nodes. I am looking at https://docs.k3s.io/upgrades/manual and I was going to use

curl -sfL <https://get.k3s.io> | <EXISTING_K3S_ENV> sh -s - <EXISTING_K3S_ARGS>

however I am not sure what to fill in for

<EXISTING_K3S_ENV>

and

<EXISTING_K3S_ARGS>

. When I installed K3S I did something like:

$ export K3S_URL=<https://kubemaster.mydomain.com:6443>
$ export K3S_TOKEN=$TOKEN
$ curl -fsL <https://get.k3s.io> | K3S_URL=$K3S_URL K3S_TOKEN=$K3S_TOKEN sh -