Lab 3.2 unable to join the cluster from worker node
Hi, i am on step 7 lab 3.2. Can't join cluster from worker. Help please!
root@worker:~# kubeadm join --token ur2pat.3anbura0oc0gnuf6 k8smaster:6443 --discovery-token-ca-cert-hash sha256:c4
12a01030a81aa11acd083def04161d010334a7d6d432e7b4e1f26bde3486d5
W1022 13:29:54.004779 1788 join.go:346] [preflight] WARNING: JoinControlPane.controlPlane settings will be ignor
ed when control-plane flag is not set.
[preflight] Running pre-flight checks
[WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is
"systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/
error execution phase preflight: couldn't validate the identity of the API Server: configmaps "cluster-info" is for
bidden: User "system:anonymous" cannot get resource "configmaps" in API group "" in the namespace "kube-public"
To see the stack trace of this error execute with --v=5 or higher
Comments
-
Hi @sergeizak,
What are you using for VMs - local VMs, or cloud VM instances?
What are you VM specs and the OS?
Did you install docker or CRI-O?
What was the age of the token at the time the join command was issued?
Regards,
-Chris0 -
Hi Chris,
I am using Google VMsSpecs are n1-standard-2 (2 vCPUs, 7.5 GB memory), Ubuntu 18.04
Docker
Freshly generated token
It takes about 5 minutes for the error to show up
Thanks
Sergei0 -
I ended up recreating master and it's working now
0 -
I have the same issue, can someone please help with the possible solution?
0 -
Nevermind, it got fixed!
0 -
i have the same issue , why when you solve a problem dont write it for another ????
1 -
Requesting people here who have fixed to help with providing the solution please . I already recreated master and redid the steps it does not resolve the problem for me .Thanks in advance
0 -
It happened to me when I init my master with docker using cgroupfs driver and kubelet failed to start. Fixed docker configuration by updating
/etc/docker/daemon.json
to use systemd first. Then recreated the master usingkubeadm reset
and thenkubeadm init
. After that the issue was fixed.To fix the above mention issue alone, you can try to update access policy via
# kubectl create clusterrolebinding test:anonymous --clusterrole=cluster-admin --user=system:anonymous
but after I did that I encountered another issue that "cluster-info" is missing. To fix this one, I have to re-create my master node.
0
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