Brian
December 1, 2025, 10:18am
1
Hi,
I’m getting this error when running a Docker container inside a Proxmox VM:
Fatal glibc error: CPU does not support x86-64-v2
how do i get around this?
Hi!
As you’re referring to an issue with Keycloak, you can simply look up their documentation on it.
Looks like their users have found a solution for your problem.
opened 11:25AM - 26 Feb 23 UTC
closed 02:41PM - 07 Mar 23 UTC
kind/bug
area/dist/quarkus
team/cloud-native
### Before reporting an issue
- [X] I have searched existing issues
- [X] I … have reproduced the issue with the latest release
### Area
core
### Describe the bug
I'm trying to build my docker container based on keycloak:21.0, but it fails on build.sh, and says:
``Fatal glibc error: CPU does not support x86-64-v2``

I haven't had any problem with the previous releases.
I'm on a VPS, based on Ubuntu Server 22.04, with all the latest packages.
### Version
21.0
### Expected behavior
build the docker container
### Actual behavior
build fails
### How to Reproduce?
build docker container with latest 21.0 version
### Anything else?
nothing special in my config, i use everything according to best practices
I’m not an expert in Proxmos myself though
Brian
December 1, 2025, 1:42pm
3
that was indeed a good suggestion
Thank you!
The cure was changing the CPU from KVM64 to host on proxmox
1 Like