kubernetes - Validate Cluster - api/v1/nodes: http: server gave HTTP response to HTTPS client

Question

On my ubuntu 18.04 aws server I try to create cluster via kops.

kops create cluster 
  --name=asdf.com 
  --state=s3://asdf 
  --zones=eu-west-1a 
  --node-count=1 
  --node-size=t2.micro 
  --master-size=t2.micro 
  --master-count=1 
  --dns-zone=asdf.com 
  --ssh-public-key=~/.ssh/id_rsa.pub

kops update cluster --name asdf.com

Succesfully Updated my cluster. But when i try to validate and try to

kubectl get nodes

I got the error : Server gave http response to https server

kops validate cluster --name asdf.com

Validation failed: unexpected error during validation: error listing nodes: Get https://api.asdf.com/api/v1/nodes: http: server gave HTTP response to HTTPS client

Error

I could’nt solve this.

I tried

kubectl config set-cluster asdf.com --insecure-skip-tls-verify=true

but it didnt work.

Please can you help?

question from:https://stackoverflow.com/questions/65861600/validate-cluster-api-v1-nodes-http-server-gave-http-response-to-https-client

Answer 1

t2.micro instances may be too small for a control plane nodes. They will certainly be very slow in booting properly. You can try omitting that flag (i.e use the default size) and see if that boots up properly.

Tip: use kops validate cluster --wait=30m as it may provide more clues to what is wrong.

Except for the instance size, the command above looks good. But if you want to dif deeper, you can have a look at https://kops.sigs.k8s.io/operations/troubleshoot/