Install K3s Agent On Ubuntu 20.04
Get Kubernetes Token
SSH into one of your controller servers, and run:
sudo cat /var/lib/rancher/k3s/server/node-token
Now that we have our token, SSH into the server you wish to become an agent, and run the following script (addig the token as a variable).
LOAD_BALANCER_IP=192.168.0.73 TOKEN="K1033..." sudo curl -sfL https://get.k3s.io | K3S_URL=https://$LOAD_BALANCER_IP:6443 K3S_TOKEN=$TOKEN sh -
Testing It Worked
If you now log into one of your master/controller servers and run:
sudo k3s kubectl get node
... then you will see your agent, like below:
NAME STATUS ROLES AGE VERSION kube1 Ready control-plane,master 94m v1.21.1+k3s1 kube-agent1 Ready <none> 8m20s v1.21.1+k3s1 kube2 Ready control-plane,master 92m v1.21.1+k3s1 kube3 Ready control-plane,master 43m v1.21.1+k3s1
Error Message When Running Command On Agent
If you run the command above on the agent, instead of one of the master/controller servers, then you will get the following error message:
The connection to the server localhost:8080 was refused - did you specify the right host or port?
In order to get the command working on the agents, you need to follow the configuration section on my post on how to install kubectl on your local machine.
- Kubernetes Forum - The connection to the server localhost:8080 was refused - did you specify the right host or port?
First published: 23rd June 2021