Cannot run lab. Fedora 32 about diveintoansible-lab HOT 6 CLOSED

Hi @yokodev

At the moment I don't have a way of making the lab images work for both cgroups v1 and v2 unfortunately, it is an area I'm looking into.

This post gives some more context on the difficulties (the lab images, use systemd to emulate a real system) -

https://serverfault.com/questions/1053187/systemd-fails-to-run-in-a-docker-container-when-using-cgroupv2-cgroupns-priva

After doing the course, you could revert the settings if desired to put this back as it was 👍

from diveintoansible-lab.

Hi @yokodev

This is related to this Linux version having cgroups v2 instead of v1, it affects Docker and Kubernetes. Fedora is more of a bleeding edge release so sometimes these kind of issues arise before they're widely adopted and resolved.

If you revert to cgroup v1 using the following commands, you'll be good to go -

sudo dnf install grubby

sudo grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=0"

Then, reboot

Best Regards

James Spurin

from diveintoansible-lab.

Thanks for the quick reply... Is there any other way of doing this? I'm not sure I want to downgrade the Cgroups.
I was reading about it and apparently, it brings some good stuff to the table... Please Advice

from diveintoansible-lab.

Hello, I am having the same issue but on Arch Linux. I already edited GRUB to start with systemd.unified_cgroup_hierarchy=0.

[aquinas@cave diveintoansible-lab]$ cat /proc/cmdline BOOT_IMAGE=/vmlinuz-linux root=UUID=ef929d12-55e4-4d64-bc41-41f4239bda4f rw loglevel=3 quiet systemd.unified_cgroup_hierarchy=0

EDIT: it works now :) all I had to do was run docker-compose rm and then docker-compose up

from diveintoansible-lab.

Hi,

With the system booted, what's the output you have when running mount please?

Thanks

James

from diveintoansible-lab.

Ahh perfect! I replied without seeing the edit, glad it's all working for you!

from diveintoansible-lab.