[gooseyard]

its sort of weird to think that the notion that portability with respect to cgroups is now primarily about whether your version of the linux kernel supports the revision of cgroups that you're concerned about, rather than that you have a kernel that understands cgroups.

[kreetx]

How many versions of cgroups APIs are there?

[okwhateverdude]

Two. And what's funny, I saw some of the fallout from the transition from v1 to v2 only last year at my last gig. Company upgraded Debian and Debian maintainers opted to go v2 only in the kernel build. However, the version of JVM the company was using did not fully support v2. Without the cgroup support, each JVM in a container thought they had the resources of the whole system. It was a cluster (heh) fuck, as in that all of the affected services OOM'd thinking they had more heap potential and the k8s cluster was churning pods like no tomorrow.