Kubernetes

K3s install

curl -sfL https://get.k3s.io | K3S_KUBECONFIG_MODE="644" sh -s - 

Adding node to the cluster

get the token from the master with

cat /var/lib/rancher/k3s/server/node-token

then to install run

curl -sfL https://get.k3s.io | K3S_TOKEN="YOUR TOKEN" K3S_URL="https://yourserver:6443" K3S_NODE_NAME="servername" sh -

To install rancher

go in the master server and create the file

/etc/rancher/rke2/config.yaml

the content of this file is

token: <anything>
tls-san:
  - <server ip>

then run

curl -sfL https://get.rancher.io | sh -

then enable and start the service

systemctl enable rancherd-server.service
systemctl start rancherd-server.service

then reset your adm password

rancherd reset-admin

if you get some error like "FATA[0000] cluster and rancher are not ready." wait a little more, because your cluster is not ready yet.