Lab 3.2 - Step 11. cannot create token on worker

Hi. Have a problem when creating a token on worker (step 11 Lab 3.2 - Growing the Cluster).
root@ip-172-31-35-153:~# sudo kubeadm token list
failed to load admin kubeconfig: open /root/.kube/config: no such file or directory
To see the stack trace of this error execute with --v=5 or higher
root@ip-172-31-35-153:~#
Any help is much appreciated.
Comments
-
kubeadm token <list,create,...> commands are run on the cp. You can use these tokens in the kubeadm join command on the worker
0 -
Hi Triaris, actually that's the error I have from cp node.
ubuntu@ip-172-31-27-178:~$ kubeadm token list
failed to list bootstrap tokens: Get "https://k8scp:6443/api/v1/namespaces/kube-system/secrets?fieldSelector=type=bootstrap.kubernetes.io/token": dial tcp 172.31.27.178:6443: connect: connection refused
To see the stack trace of this error execute with --v=5 or higher
ubuntu@ip-172-31-27-178:~$0 -
Hi @telcomx,
When bootstrapping the cluster, did you follow the video from the introductory chapter, and are you running the recommended VM guest OS and version?
Regards,
-Chris0 -
Hi @chrispokorni
Yes, I am using AWS with two EC2 instances, one as CP (t2.medium) and one WORKER (t2.micro).
Did setup securoty groups as ALL open as per video suggest.
Picture attached.0 -
Hi @telcomx,
The selected t2 sizes may not be sufficient. What OS distribution and version is installed on the EC2s?
Regards,
-Chris0 -
I am using ubuntu-jammy-22.04-amd64-server-20230208 distro.
0 -
0
-
so shall i reinstall from scratch or there's an option to make downgrade on aws?
0 -
FYI @chrispokorni
Had to rebuild whole cp and worker as t2.large from scratch using recommended ubuntu and worked. Finally i managed to complete LAB 3.2 Thanks.
ubuntu@ip-172-31-20-93:~$ sudo kubeadm join --token 0692sx.xjxhhcj7gobtwfs5 k8scp:6443 --discovery-token-ca-cert-hash sha256:05a1165104ec15bafbf51690cb5eb3944b2648af728a077671884e1bd38a2af9
[preflight] Running pre-flight checks
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Starting the kubelet
[kubelet-start] Waiting for the kubelet to perform the TLS Bootstrap...This node has joined the cluster:
- Certificate signing request was sent to apiserver and a response was received.
- The Kubelet was informed of the new secure connection details.
Run 'kubectl get nodes' on the control-plane to see this node join the cluster.
ubuntu@ip-172-31-20-93:~$ kubectl get nodes
The connection to the server localhost:8080 was refused - did you specify the right host or port?
ubuntu@ip-172-31-20-93:~$
ubuntu@ip-172-31-20-93:~$
ubuntu@ip-172-31-20-93:~$
ubuntu@ip-172-31-20-93:~$ ls -l .kube
ls: cannot access '.kube': No such file or directory
ubuntu@ip-172-31-20-93:~$
ubuntu@ip-172-31-20-93:~$
ubuntu@ip-172-31-20-93:~$0
Categories
- All Categories
- 50 LFX Mentorship
- 103 LFX Mentorship: Linux Kernel
- 575 Linux Foundation IT Professional Programs
- 304 Cloud Engineer IT Professional Program
- 125 Advanced Cloud Engineer IT Professional Program
- 53 DevOps Engineer IT Professional Program
- 60 Cloud Native Developer IT Professional Program
- 5 Express Training Courses
- 5 Express Courses - Discussion Forum
- 2K Training Courses
- 19 LFC110 Class Forum
- 7 LFC131 Class Forum
- 27 LFD102 Class Forum
- 157 LFD103 Class Forum
- 20 LFD121 Class Forum
- 1 LFD137 Class Forum
- 61 LFD201 Class Forum
- 1 LFD210 Class Forum
- LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 611 LFD259 Class Forum
- 105 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 1 LFD273 Class Forum
- 2 LFS145 Class Forum
- 24 LFS200 Class Forum
- 739 LFS201 Class Forum
- 1 LFS201-JP クラス フォーラム
- 11 LFS203 Class Forum
- 75 LFS207 Class Forum
- 300 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 37 LFS243 Class Forum
- 11 LFS244 Class Forum
- 36 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 140 LFS253 Class Forum
- LFS254 Class Forum
- 1.1K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 93 LFS260 Class Forum
- 132 LFS261 Class Forum
- 33 LFS262 Class Forum
- 80 LFS263 Class Forum
- 15 LFS264 Class Forum
- 11 LFS266 Class Forum
- 18 LFS267 Class Forum
- 17 LFS268 Class Forum
- 23 LFS269 Class Forum
- 203 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- LFS281 Class Forum
- 233 LFW211 Class Forum
- 172 LFW212 Class Forum
- 7 SKF100 Class Forum
- SKF200 Class Forum
- 902 Hardware
- 219 Drivers
- 74 I/O Devices
- 44 Monitors
- 115 Multimedia
- 209 Networking
- 101 Printers & Scanners
- 85 Storage
- 763 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 142 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 479 Linux System Administration
- 41 Cloud Computing
- 70 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 78 Network Management
- 108 System Management
- 49 Web Management
- 68 Mobile Computing
- 23 Android
- 30 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 537 Off Topic
- 131 Introductions
- 217 Small Talk
- 21 Study Material
- 826 Programming and Development
- 278 Kernel Development
- 514 Software Development
- 928 Software
- 260 Applications
- 184 Command Line
- 3 Compiling/Installing
- 76 Games
- 316 Installation
- 62 All In Program
- 62 All In Forum
Upcoming Training
-
August 20, 2018
Kubernetes Administration (LFS458)
-
August 20, 2018
Linux System Administration (LFS301)
-
August 27, 2018
Open Source Virtualization (LFS462)
-
August 27, 2018
Linux Kernel Debugging and Security (LFD440)