error detecting the lowest Kubernetes version Get "https://10.5.0.2:6443/api/v1/namespaces/kube-system/pods": dial tcp 10.5.0.2:6443: i/o timeout

[BenHiramTaylor]

Bug Report

Description

I may have discovered a bug with the Talosctl cli, please close this if it is expected local functionality.

TLDR
When using local cluster made from talosctl cluster create --workers 3 --controlplanes 2 --kubernetes-version 1.31.4 running an upgrade-k8s command fails with i/o timeout.

I was playing around with Talos specifically for learning purposes, I am familiar with K8s but wanted to see how Talos would handle K8s upgrades on HA clusters.

I installed the latest talosctl version and create a local cluster in Docker Desktop with the above cluster create command.
All elements of the cluster are showing and running fine as shown below

When I attempt to try an upgrade to 1.32.0 with talosctl --nodes 10.5.0.2 upgrade-k8s --to 1.32.0 (same error with --dry-run)
it fails with the following error

I know that the optimal way to upgrade a local test cluster is to delete and recreate it but I wanted to see the upgrade in action, please close if this is expected functionality.

Logs

talosctl cluster create --workers 3 --controlplanes 2 --kubernetes-version 1.31.4

talosctl --nodes 10.5.0.2 upgrade-k8s --to 1.32.0
error detecting the lowest Kubernetes version Get "https://10.5.0.2:6443/api/v1/namespaces/kube-system/pods": dial tcp 10.5.0.2:6443: i/o timeout

Environment

• Talos version: [1.9.1]
• Kubernetes version: [v1.31.4]
• Platform: Debian WSL Windows 11

[smira]

This is a limitation on Docker non-Linux which doesn't expose container IPs. It's actually a bug in talosctl as well.

As a workaround you can see the exposed endpoint on the localhost in the first Talos contianer port and force talosctl upgrade-k8s to use that with the endpoint like --endpoint=https://127.0.0.1:<exposed port>