I followed the tutorial how to create a k8s cluster on aws using ubuntu. This works great, so I have one master and three nodes - minions. However I haven't found any working working recipe how to add a new node to the cluster.

1. First of all, I have a new autoscaling group in aws. It was created along with the cluster. I tried to increase the number of nodes in the scaling group, the scaling procedure really added an instance but the node is not among the k8s cluster. There is no kubelet, kube-proxy, no such thing on the instance. So, it's reasonable that it did not join the k8s cluster.

As I have not found any tutorial, maybe I need to do some manual procedure. But it would be weird autoscaling. What am I supposed to do? kube scripts install the cluster, add scaling group and it does not work?

2. I do not insist on the automatic scaling, I just need to add a new node in the case of any failure or how we will add new running pods/rcs. I found a reference in this article in the section called Add more nodes in a second zone, note that this is about multizone deployment.

So I tried things like:

KUBE_USE_EXISTING_MASTER=true KUBERNETES_PROVIDER=aws KUBE_AWS_ZONE=eu-central-1b NUM_NODES=1 KUBE_SUBNET_CIDR=172.20.1.0/24 MASTER_INTERNAL_IP=172.20.0.9 kubernetes/cluster/kube-up.sh

but it always failed with:

A client error (AlreadyExists) occurred when calling the CreateLaunchConfiguration operation: Launch Configuration by this name already exists - A launch configuration already exists with the name kubernetes-minion-group-eu-central-1b

There must be definitely some way how to do that, can you please someone help me? Thank you!