LFD259 LAB worker not able to connect with master node in Kubernetes

arpitsharma14

i am not able to connect worker node to master node

getting the error below:

ubuntu@ip-172-31-88-44:~$ sudo kubeadm join 172.31.92.198:6443 --token 7i3xij.1pf0136a6r3xkizr --discovery-token-ca-cert-hash sha256:32bf354f01be488b30ec583ae4d608ca0b238a55ef4778d5c2e3399a3621bb21
[preflight] Running pre-flight checks

error execution phase preflight: couldn't validate the identity of the API Server: Get "https://172.31.92.198:6443/api/v1/namespaces/kube-public/configmaps/cluster-info?timeout=10s": net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
To see the stack trace of this error execute with --v=5 or higher

Master config:
kubectl config view
apiVersion: v1
clusters:

cluster:
certificate-authority-data: DATA+OMITTED
server: https://172.31.92.198:6443
name: kubernetes
contexts:

context:
cluster: kubernetes
user: kubernetes-admin
name: kubernetes-admin@kubernetes
current-context: kubernetes-admin@kubernetes
kind: Config
preferences: {}
users:

name: kubernetes-admin
user:
client-certificate-data: DATA+OMITTED
client-key-data: DATA+OMITTED

But on. worker node i am getting this error ::

ubuntu@ip-172-31-88-44:~$ kubectl get nodes
E0110 05:52:47.493279 14982 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp 127.0.0.1:8080: connect: connection refused
E0110 05:52:47.493641 14982 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp 127.0.0.1:8080: connect: connection refused
E0110 05:52:47.495078 14982 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp 127.0.0.1:8080: connect: connection refused
E0110 05:52:47.495417 14982 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp 127.0.0.1:8080: connect: connection refused
E0110 05:52:47.496871 14982 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp 127.0.0.1:8080: connect: connection refused
The connection to the server localhost:8080 was refused - did you specify the right host or port?

chrispokorni

Hi @arpitsharma14,

Please try to post a new issue only once. Posting the same issue multiple times does not speed up the solutioning time, nor it is favored by forum administrators who typically flag redundant posts as spam.

My answer to your questions:

https://forum.linuxfoundation.org/discussion/comment/39133/#Comment_39133

Please use this thread as it is most relevant for additional details related to the join command, until it is solutioned.

Regards,
-Chris