[aws] Error in task "Building Kubernetes clientset..."

[enote-kane]

What happened?

While trying to set up my first cluster an error occurred:

INFO[17:36:51 CEST] Running kubeadm preflight checks...          
INFO[17:36:51 CEST]     preflight...                                 node=172.31.179.74
INFO[17:36:51 CEST]     preflight...                                 node=172.31.177.218
INFO[17:36:51 CEST]     preflight...                                 node=172.31.178.187
INFO[17:37:09 CEST] Pre-pull images                               node=172.31.179.74
INFO[17:37:09 CEST] Pre-pull images                               node=172.31.178.187
INFO[17:37:09 CEST] Pre-pull images                               node=172.31.177.218
INFO[17:37:11 CEST] Configuring certs and etcd on control plane node... 
INFO[17:37:11 CEST] Ensuring Certificates...                      node=172.31.177.218
INFO[17:37:13 CEST] Downloading PKI...                           
INFO[17:37:13 CEST] Creating local backup...                      node=172.31.177.218
INFO[17:37:13 CEST] Uploading PKI...                             
INFO[17:37:15 CEST] Configuring certs and etcd on consecutive control plane node... 
INFO[17:37:15 CEST] Ensuring Certificates...                      node=172.31.179.74
INFO[17:37:15 CEST] Ensuring Certificates...                      node=172.31.178.187
INFO[17:37:17 CEST] Initializing Kubernetes on leader...         
INFO[17:37:17 CEST] Running kubeadm...                            node=172.31.177.218
INFO[17:38:08 CEST] Building Kubernetes clientset...             
WARN[17:38:08 CEST] Task failed, error was: kubernetes: building dynamic kubernetes client
Get "https://kubeone-cluster-api-lb-153808776.eu-central-1.elb.amazonaws.com:6443/api?timeout=32s": proxyconnect tcp: ssh: tunneling
connection to: 127.0.0.1:8118
ssh: rejected: connect failed (Connection refused) 
WARN[17:38:18 CEST] Retrying task...                             
INFO[17:38:18 CEST] Building Kubernetes clientset...             
WARN[17:38:19 CEST] Task failed, error was: kubernetes: building dynamic kubernetes client
Get "https://kubeone-cluster-api-lb-153808776.eu-central-1.elb.amazonaws.com:6443/api?timeout=32s": proxyconnect tcp: ssh: tunneling
connection to: 127.0.0.1:8118
ssh: rejected: connect failed (Connection refused)

Expected behavior

The cluster gets initialized properly.

How to reproduce the issue?

1. follow the documentation at https://docs.kubermatic.com/kubeone/v1.7/tutorials/creating-clusters/

What KubeOne version are you using?

$ kubeone version
{
  "kubeone": {
    "major": "1",
    "minor": "7",
    "gitVersion": "1.7.0",
    "gitCommit": "1195366fd0cf11f314d194a3b29b6a782afde9a8",
    "gitTreeState": "",
    "buildDate": "2023-09-08T14:02:33Z",
    "goVersion": "go1.20.5",
    "compiler": "gc",
    "platform": "linux/amd64"
  },
  "machine_controller": {
    "major": "1",
    "minor": "57",
    "gitVersion": "v1.57.3",
    "gitCommit": "",
    "gitTreeState": "",
    "buildDate": "",
    "goVersion": "",
    "compiler": "",
    "platform": "linux/amd64"
  }
}

Provide your KubeOneCluster manifest here (if applicable)

apiVersion: kubeone.k8c.io/v1beta2
kind: KubeOneCluster
versions:
  kubernetes: "1.27.5"
cloudProvider:
  aws: {}
  external: true

What cloud provider are you running on?

AWS

What operating system are you running in your cluster?

Amazon Linux

Additional information

In the AWS console I can see that the load balancer it tries to access is taken offline, since it is unhealthy due to 2 nodes not being in-service: