What if I'm running NGINX inside a Alpine-based docker container, but the host OS is Ubuntu? I guess the kernel is okay but OpenSSL provided by Alpine is not ready for kTLS, so NGINX will not enable kTLS as well.
>The following OSs do not support kTLS, for the indicated reason:
>Alpine Linux 3.11–3.14 – Kernel is built with the CONFIG_TLS=n option, which disables building kTLS as a module or as part of the kernel.
and even recommends building OpenSSL and Nginx 3.0 yourself anyway, so looks like it will be a while before this might be available out-of-the-box for most major dists. But of course everything is OSS so you can DIY if you don't mind getting some ./configure under your fingernails :)