Reproducer

Prerequisites

Standalone tools

• kind (v0.8.0+, Tested with v0.9.0)
• kubectl (tested with v1.18.8)
• tilt (v0.17.8+, tested with v0.17.9)

Setup

• Bring up a new kind cluster

kind create cluster

• Start tilt

tilt up

Bring up the worker VM

kubectl create -f deploy/kind/worker.yaml

What is expected

Worker vm is created and has an interface attached to a macvtap network via l2 connectivity

What happens

virt-launcher pod fails to create with the following error:

  Warning  Failed          12s   kubelet, kind-control-plane  Error: failed to generate container "3059716e18ca6af8de9c131d0fb190fc24f6ef2079b0215a62907e0138c910bc" spec: failed to generate spec: lstat /dev/tap14: no such file or director

• Shelling into the kind container (docker exec -it kind-control-plane bash), /dev/tap14 does not exist
• On the host machine, /dev/tap14 is present

It appears that either macvtap-cni is creating the tap device on the physical host rather than in the kind-control-plane container where the kubelet (and the device plugin) are running.

Teardown

kind delete cluster