Lab 4.1 - kubeadm ugrade plan error
Hi,
When running #7 in Lab 4.1 under "Upgrade the Cluster"sudo kubeadm upgrade plan
Which results in the error:
[upgrade/config] Next steps:
- OPTION 1: Run 'kubeadm config upload from-flags' and specify the same CLI arguments you passed to 'kubeadm init' when you created your control-plane.
- OPTION 2: Run 'kubeadm config upload from-file' and specify the same config file you passed to 'kubeadm init' when you created your control-plane.
- OPTION 3: Pass a config file to 'kubeadm upgrade' using the --config flag.
[upgrade/config] FATAL: the ConfigMap "kubeadm-config" in the kube-system namespace used for getting configuration information was not found
I had a feeling an error was coming when I ran this command under section 7 of "Backup ETCD Database" same lab.
sudo cp /root/kubeadm-config.yaml $HOME/backup/
and it tells me no such file or directory.
I followed instructions building the cluster, and had no other errors up until this point. I'm trying to view my command line history but I think it may have overwritten my earliest commands.
I think this was what I ran to build the cluster,kubeadm init --config=kubeadm-config.yaml --upload=certs
There is a kubeadm-config.yaml I found in /home/pch/manifest/kubeadm-config.yaml
Needless to say I've tried Options 1, 2,3 in the error output, passing the kubeadm-config.yaml to kubeadm upgrade but just more errors.
Comments
-
Hi @PeterCharuza,
Both errors are cased by the
kubeadm-config.yaml
file missing from the root directory.Regards,
-Chris0 -
Hi @chrispokorni
I tried to move the file from the location I had it saved to /root, but still didn't make a difference.Here are the contents of the file:
pch@master:~$ cat /home/pch/manifest/kubeadm-config.yaml
apiVersion: kubeadm.k8s.io/v1beta2
kind: ClusterConfiguration
kubernetesVersion: 1.20.1
controlPlaneEndpoint: "master:6443"
networking:
podSubnet: 10.0.0.0/160 -
Another potentially telling output?
pch@master:~$ kubectl -n kube-system get cm kubeadm-config -o yaml Error from server (NotFound): configmaps "kubeadm-config" not found
I'm trying to see if there is way to create this configmap now, hopefully allowing the cluster to upgrade.
0 -
Hi @PeterCharuza,
Exploring the file
/root/kubeadm-init.out
may help to find out how the cluster was bootstrapped (assuming it was generated if the steps from the lab guide have been followed).Your
kubeadm-config.yaml
seems to be dated. I would recommend taking a look at the updated course content. Also, the value of thecontrolPlaneEndpoint
was intended to be an alias, not an actual hostname.With your
kubeadm-config.yaml
found in an unexpected directory, it seems that the installation steps have not been followed as presented, leading to possible cluster misconfiguration. Please read carefully and follow the installation steps as they are presented in the lab guide - from the very beginning of Lab Exercise 3.1.Regards,
-Chris0 -
Hi @chrispokorni Thanks for that, I did compare my command line history to the Lab 3.1 guide I have in PDF form, and it seemed to match but good call could be out of date.
That said more likely a mistake on my part I will check out 3.1 again. Thanks for the support and info!
0
Categories
- All Categories
- 64 LFX Mentorship
- 117 LFX Mentorship: Linux Kernel
- 618 Linux Foundation IT Professional Programs
- 322 Cloud Engineer IT Professional Program
- 141 Advanced Cloud Engineer IT Professional Program
- 56 DevOps Engineer IT Professional Program
- 67 Cloud Native Developer IT Professional Program
- 6 Express Training Courses
- 6 Express Courses - Discussion Forum
- 2.4K Training Courses
- 19 LFC110 Class Forum - Discontinued
- 9 LFC131 Class Forum
- 31 LFD102 Class Forum
- 178 LFD103 Class Forum
- LFD110 Class Forum
- 24 LFD121 Class Forum
- LFD133 Class Forum
- 2 LFD137 Class Forum
- 62 LFD201 Class Forum
- 2 LFD210 Class Forum
- 1 LFD210-CN Class Forum
- 1 LFD213 Class Forum - Discontinued
- 128 LFD232 Class Forum - Discontinued
- LFD233 Class Forum
- LFD237 Class Forum
- 23 LFD254 Class Forum
- 660 LFD259 Class Forum
- 108 LFD272 Class Forum
- 1 LFD272-JP クラス フォーラム
- 4 LFD273 Class Forum
- 1 LFS101 Class Forum
- LFS116 Class Forum
- 2 LFS145 Class Forum
- LFS151 Class Forum
- LFS158 Class Forum
- LFS167 Class Forum
- 28 LFS200 Class Forum
- 740 LFS201 Class Forum - Discontinued
- 1 LFS201-JP クラス フォーラム
- 13 LFS203 Class Forum
- 98 LFS207 Class Forum
- 301 LFS211 Class Forum
- 54 LFS216 Class Forum
- 47 LFS241 Class Forum
- 41 LFS242 Class Forum
- 38 LFS243 Class Forum
- 12 LFS244 Class Forum
- LFS245 Class Forum
- 41 LFS250 Class Forum
- 1 LFS250-JP クラス フォーラム
- LFS251 Class Forum
- 143 LFS253 Class Forum
- LFS254 Class Forum
- LFS255 Class Forum
- 2 LFS256 Class Forum
- LFS257 Class Forum
- 1.2K LFS258 Class Forum
- 10 LFS258-JP クラス フォーラム
- 109 LFS260 Class Forum
- 147 LFS261 Class Forum
- 39 LFS262 Class Forum
- 83 LFS263 Class Forum - Discontinued
- 15 LFS264 Class Forum - Discontinued
- 11 LFS266 Class Forum - Discontinued
- 21 LFS267 Class Forum
- 18 LFS268 Class Forum
- 26 LFS269 Class Forum
- 204 LFS272 Class Forum
- 1 LFS272-JP クラス フォーラム
- LFS274 Class Forum
- 3 LFS281 Class Forum
- 258 LFW211 Class Forum
- 179 LFW212 Class Forum
- 9 SKF100 Class Forum
- SKF200 Class Forum
- 908 Hardware
- 221 Drivers
- 74 I/O Devices
- 44 Monitors
- 116 Multimedia
- 210 Networking
- 102 Printers & Scanners
- 86 Storage
- 765 Linux Distributions
- 88 Debian
- 66 Fedora
- 15 Linux Mint
- 13 Mageia
- 24 openSUSE
- 144 Red Hat Enterprise
- 33 Slackware
- 13 SUSE Enterprise
- 357 Ubuntu
- 484 Linux System Administration
- 40 Cloud Computing
- 71 Command Line/Scripting
- Github systems admin projects
- 95 Linux Security
- 80 Network Management
- 108 System Management
- 52 Web Management
- 75 Mobile Computing
- 25 Android
- 35 Development
- 1.2K New to Linux
- 1.1K Getting Started with Linux
- 544 Off Topic
- 131 Introductions
- 223 Small Talk
- 22 Study Material
- 836 Programming and Development
- 285 Kernel Development
- 517 Software Development
- 975 Software
- 261 Applications
- 185 Command Line
- 3 Compiling/Installing
- 119 Games
- 318 Installation
- 65 All In Program
- 65 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)