@Tej_Singh_Rana, @Mohamed Ayman,while attempting the lightning lab, i see some e . . .

V S Charan kumar Reddy Bakka:
@Tej_Singh_Rana, @Mohamed Ayman,while attempting the lightning lab, i see some error while updating the KUBEADM, PFB Error:

W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://dl.yarnpkg.com/debian stable InRelease: The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <mailto:yarn@dan.cx|yarn@dan.cx>
W: An error occurred during the signature verification. The repository is not updated and the previous index files will be used. GPG error: https://packages.cloud.google.com/apt kubernetes-xenial InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY FEEA9169307EA071 NO_PUBKEY 8B57C5C2836F4BEB
W: Failed to fetch http://apt.kubernetes.io/dists/kubernetes-xenial/InRelease The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY FEEA9169307EA071 NO_PUBKEY 8B57C5C2836F4BEB
W: Failed to fetch https://dl.yarnpkg.com/debian/dists/stable/InRelease The following signatures were invalid: EXPKEYSIG 23E7166788B63E1E Yarn Packaging <mailto:yarn@dan.cx|yarn@dan.cx>
E: Failed to fetch https://packages.microsoft.com/ubuntu/18.04/prod/dists/bionic/main/binary-amd64/Packages.bz2 File has unexpected size (186036 != 185650). Mirror sync in progress? [IP: 13.81.215.193 443]
Hashes of expected file:
- Filesize:185650 [weak]
- SHA512:3c4b7d3b74e5d1dbb64552a98ceb37afeb46f2df4ce12570dfaba9ef69e7478d7e83c135d16dd81adb834e76971eb7d880b8be7c94e11b4cff20243b61601e05
- SHA256:436291009c4d1f23a9b0801a5a27d862a09f196d2f8b4570e88501df252ad66f
- SHA1:ddc8d6031d1efea089674c486177fd4578296657 [weak]
- MD5Sum:2cac2b69dd9614147477e4021b8a9a24 [weak]
Release file created at: Sat, 15 May 2021 00:37:31 +0000
W: Some index files failed to download. They have been ignored, or old ones used instead.
controlplane $

I tried reprovisioning the labs aswell.

kubeadm version is still in 1.18…and cant update to next step…can aanyone help resolve this?

unnivkn:
Hi… Did you properly followed this doc ? open a new session & try this. Also try to use: "sudo -i " before every apt command (eg: sudo -i apt update) https://v1-19.docs.kubernetes.io/docs/tasks/administer-cluster/kubeadm/kubeadm-upgrade/

unnivkn:
Hi…Its working for me. Please try again & ignore if you get any error in the middle.
controlplane kubectl get nodes NAME STATUS ROLES AGE VERSION controlplane Ready master 3m33s v1.18.0 node01 Ready &lt;none&gt; 2m35s v1.18.0 controlplane

controlplane k get nodes NAME STATUS ROLES AGE VERSION controlplane Ready master 17m v1.19.0 node01 Ready &lt;none&gt; 16m v1.19.0 controlplane

V S Charan kumar Reddy Bakka:
@unnivkn, hi…i have ignored the errors…but when you cehck for kubeadm version after running the te upgrade command for kubeadm…its still in 1.18 only…instead of 1.19…it was working lastweek …not sure why its not working now

unnivkn:
can you run this for me… one more try?

unnivkn:
sudo -i apt-get update &&
sudo -i apt-get install -y --allow-change-held-packages kubeadm=1.19.0-00

V S Charan kumar Reddy Bakka:
hey itseems to be working now!!

V S Charan kumar Reddy Bakka:
thanks

unnivkn:
cool… you welcome