LFS258 updated to k8s 1.31.1 and Ubuntu 24.04 (9/30/2024)
Hi,
Kubernetes Administration (LFS258) has been updated to Kubernetes v1.31.1 and Ubuntu 24.04. We have updated the scripts, YAMLs, and lab content to align with the new version. Course lectures have received some minor updates as well.
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Regards,
Flavia
Linux Foundation Education
Comments
-
LFS258-labs_V2024-09-30.pdf, chapter 3 step 21:
I suppose this option is wrong:--node-name=cp
and it produces:[WARNING Hostname]: hostname "cp" could not be reached
instead it should say:--node-name=k8scp
0 -
Hi @PetroKazmirchuk,
If you pay close attention to the training guide, and the warning produced by the command, you can easily see that
cp
is the actual hostname of the control plane node. In the context of the lab guide, the command is correct. While using thek8scp
alias works, setting the node name as such during theinit
phase introduces inconsistencies in your environment and eventually conflicts in later lab exercises.Make sure to use the control plane hostname of your Kubernetes cluster, or simply
cp
if it is included in the/etc/hosts
file together with thek8scp
alias.Regards,
-Chris1 -
understood, many thanks for your quick reply!
0 -
Hello TLF Team,
I'm a bit confused.
Currently I'm going through the LFS258 and I'm in the beginning part at Lab 3.1. Install Kubernetes.Step 14, pertaining to downloading the GPG key for the K8s repo reads:
root@cp: ̃# curl -fsSL https://pkgs.k8s.io/core:/stable:/v1.29/deb/Release.key \ | sudo gpg --dearmor -o /etc/apt/keyrings/kubernetes-apt-keyring.gpg
So according to the above we'd be working with K8s v1.29.
Step 15, pertaining to adding the Deb repository for which we presumably added the GPG key in the previous step, reads:
root@cp: ̃# echo "deb [signed-by=/etc/apt/keyrings/kubernetes-apt-keyring.gpg] \ https://pkgs.k8s.io/core:/stable:/v1.30/deb/ /" \ | sudo tee /etc/apt/sources.list.d/kubernetes.list
Unless I read this wrong, the above would imply that we should actually install K8s v1.30.
Not only that but since in Step 14 we added the GPG key for v1.29 and now we're adding the repo for v1.30, won't that generate some errors when trying to do anapt update
?Also the instructions in Steps 9-10 of this lab guide, still mention the the commands below which as I understand apply for K8s v1.29 and older (in the official K8s documentation for preparing the installation of a container runtime, they seem to have disappeared starting with v1.30):
root@cp: ̃# modprobe overlay root@cp: ̃# modprobe br_netfilter ... net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1
OTOH, this post announces that the course has been updated to use K8s v1.31.
I guess my question is:
With which version of K8s are we supposed to follow along for the remainder of the course?Thank you in advance.
Best regards,
Adrian0 -
Hi @admusin,
Thanks for pointing out the typo... that is the /v1.29/ in the command retrieving the gpg key. For consistency, it should be /v1.30/, however, the gpg key remains the same for all releases. Therefore, what matters most is the Kubernetes package you download, which is the correct version v1.30 for Lab 3. With a little patience, once you reach Lab 4, v1.31 will be revealed
Regards,
-Chris1 -
Hi Chris,
Thanks for the clarification.
Reading further through the lab PDF I could see that indeed the v1.30 was being installed so I suspected as much.But thanks for confirming it and for pointing out the reason we're starting with v1.30 and not the latest.
Best regards,
Adrian0
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