Kubernetes version: v1.28.2 (Master is already v1.28.7)
Cloud being used: Virtualbox VMs
Installation method: Kubernetes Cluster VirtualBox
Host OS: Ubuntu 22.04.2 LTS
CNI and version: calico
CRI and version: containerd://1.7.2
Kubernetes upgrade went well on Master node.
However,when I started with Worker node I got stuck here:
root@worker01:~# kubeadm upgrade apply v1.28.7
[upgrade/config] Making sure the configuration is correct:
[upgrade/config] Reading configuration from the cluster...
[upgrade/config] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[upgrade/config] FATAL: failed to getAPIEndpoint: could not retrieve API endpoints for node "worker01" using pod annotations: timed out waiting for the condition
To see the stack trace of this error execute with --v=5 or highe
I will reply to myself with solution.
Apparently to upgrade command for node/worker is different than for master.
On Master node it looks like this:
kubeadm upgrade apply v1.28.7
However, on Worker node it is just this (without indicating version):
kubeadm upgrade node
root@worker01:~# kubeadm upgrade node
[upgrade] Reading configuration from the cluster...
[upgrade] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[preflight] Running pre-flight checks
[preflight] Skipping prepull. Not a control plane node.
[upgrade] Skipping phase. Not a control plane node.
[upgrade] Backing up kubelet config file to /etc/kubernetes/tmp/kubeadm-kubelet-config1211779856/config.yaml
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[upgrade] The configuration for this node was successfully updated!
[upgrade] Now you should go ahead and upgrade the kubelet package using your package manager.