Possible LXC guests instability after host OS kernel upgrade

[EuroDomenii]

Is possible that OS kernel upgrade ( minor or major) to induce instability in LXC guests?

The initial idea came from the book "Proxmox high availability" http://droppdf.com/v/FpQNV. Quote : " However, since all containers share the system kernel of the host OS, a system-related problem might appear during the host OS kernel upgrade". The author was talking about OpenVZ containers, but the same question applies also to LXC containers.

This potential issue is the only thing that is holding me for going for a high density LXC cluster, instead of KVM.

I was planing to test this, by installing an old version of Proxmox ( 4.0 beta1 with kernel 3.19.8) and to migrate the lxc container to the newest kernel 4.4.19. But I can't find the old isos http://download.proxmox.com/

Maybe an early adopter of LXC from 4.0 beginnings could share experience.

On the other hand, it makes no sense to open a separate post. Are the initial LXC issues from https://forum.proxmox.com/threads/moving-to-lxc-is-a-mistake.25603/ solved now ? At first glance, the answer is yes.

Thanks!
Disclaimer: This is a theoretical question, I didn't experienced such issues.

 

[tom]

No software is bug free and new versions will fix issues but can also introduce new bugs.

But due to our release cycles, its quite rare that major bugs are in released packages, especially in the enterprise repo.

See also:
https://forum.proxmox.com/threads/details-about-the-new-pve-no-subscripton-repository.15742/

 

[EuroDomenii]

Thanks for reply.

Of course, no one can guarantee. Since host system is Debian8 with Ubuntu based kernel, I should be always safe if my container OS is Debian8 , keeping the system uptodate.

But if my customer chooses Centos6 container ?

Let's take this use case. In your environment, do you have a running lxc container ( non -Debian) that has survived all the updates from Proxmox 4.0 betas to Proxmox 4.3?

 

[tom]

We test also with Ubuntu, CentOS, Alpine, Arch, Debian and others. Personally I run my production LXCs with Debian.