runtime-rs: failed to use kubectl cp to copy a file from host to pod

[studychao]

This bug is found in the k8s-copy-file.bats CI test.

How to reproduce the error :

1. create the pod： kubectl create -f pod.yaml

   
   pod.yaml

apiVersion: v1 kind: Pod metadata: name: pod-copy-file-from-host spec: terminationGracePeriodSeconds: 0 runtimeClassName: kata shareProcessNamespace: true containers:

• name: ctr-copy-file-from-host image: quay.io/prometheus/busybox:latest command:
  • sleep
  • "120"

2. echo "helloworld" > /tmp/file.txt

3. kubectl cp /tmp/file.txt pod-copy-file-from-host:/tmp

The step 3 failed and runtime-rs will be stuck.

[studychao]

We found out that the root cause is that we haven't supported CloseIO api.