Tuesday, 1 June 2021

Kata Containers and Ubuntu Linux - lessons learned - 3/many - a WIP

Following on from: -

Kata Containers and Ubuntu Linux - lessons learned - 1/many

and: -

Kata Containers and Ubuntu Linux - lessons learned - 2/many

here's one I've yet to solve ....

Having overcome the earlier issues with Kata Containers 2.0 on Ubuntu Linux 20.04 running under VMware Fusion 12 on macOS 11 ( phew ), I'm hitting a similar/different issue ...

Problem

Starting a container using Kata 2: -

sudo ctr run --rm --tty --runtime io.containerd.kata.v2 docker.io/library/ubuntu:latest ubuntu

returns: -

[sudo] password for hayd: 
ctr: failed to create shim: failed to launch qemu: exit status 1, error messages from qemu log: qemu-system-x86_64: error: failed to set MSR 0x48d to 0x5600000016
qemu-system-x86_64: ../target/i386/kvm.c:2701: kvm_buf_set_msrs: Assertion `ret == cpu->kvm_msr_buf->nmsrs' failed.
: unknown

From a fair amount of Google fu, I'm thinking that this is a nested virtualisation issue i.e. I'm using a nice stack of software here ....

Top

macOS 11.4 Big Sur

VMware Fusion 12.1.2

Ubuntu 20.04.2

kernel 5.4.0-73-generic

containerd 1.5.2

kata-runtime 2.1.0

qemu 4.2-3ubuntu6.16

Bottom

I've not yet got to the bottom of this ...... watch this space ....

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