missing IPv6 records for stable.release.flatcar-linux.net

[tcldr]

Description

When trying to run the ./flatcar-install, the script fails on an IPv6 only host as it is unable to resolve the stable.release.flatcar-linux.net domain.

Impact

Unable to install Flatcar Linux on IPv6 only hosts when using the ./flatcar-install script. The current workaround is to attach a v4 IP.

In my particular case, as the target network requires a configuration that can't be configured in the kernel_arguments clause, the public IP is needed solely for the initial install boot before being replaced by the final ignition network configuration.

Environment and steps to reproduce

Run ./flatcar-install on IPv6 only node.

Expected behavior

Flatcar is installed to disk successfully.

Actual behavior

Install script fails with error:
Error: return code 4 from VERSION_ID=$(wget ${WGET_ARGS} -qO- "${VERSIONTXT_URL}" | sed -n 's/^FLATCAR_VERSION=//p')

[tormath1]

Hello and thanks for opening the issue.

I will close it as a it's a duplicate of: #1513

This will be solved in the next months with the Flatcar Infra Redesign effort (#1660)