Kubernetes (1.10) mountPropagation: Bidirectional not working. - docker

Question

I'm creating a pod with a volumeMount set to mountPropagation: Bidirectional. When created, the container is mounting the volume with "Propagation": "rprivate".
From the k8s docs I would expect mountPropagation: Bidirectional to result in a volume mount propagation of rshared
If I start the container directly with docker this is working.
Some info:
Deployment Yaml
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: test
spec:
selector:
matchLabels:
app: test
strategy:
type: RollingUpdate
template:
metadata:
labels:
app: test
spec:
containers:
- image: gcr.io/google_containers/busybox:1.24
command:
- sleep
- "36000"
name: test
volumeMounts:
- mountPath: /tmp/test
mountPropagation: Bidirectional
name: test-vol
volumes:
- name: test-vol
hostPath:
path: /tmp/test
Resulting mount section from docker inspect
"Mounts": [
{
"Type": "bind",
"Source": "/tmp/test",
"Destination": "/tmp/test",
"Mode": "",
"RW": true,
"Propagation": "rprivate"
}…..
Equivalent Docker run
docker run --restart=always --name test -d --net=host --privileged=true -v /tmp/test:/tmp/test:shared gcr.io/google_containers/busybox:1.24
Resulting Mounts section from docker inspect when created with docker run
"Mounts": [
{
"Type": "bind",
"Source": "/tmp/test",
"Destination": "/tmp/test",
"Mode": "shared",
"RW": true,
"Propagation": "shared"
}...
Output of kubectl version
Client Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.1", GitCommit:"d4ab47518836c750f9949b9e0d387f20fb92260b", GitTreeState:"clean", BuildDate:"2018-04-13T22:29:03Z", GoVersion:"go1.9.5", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.1", GitCommit:"d4ab47518836c750f9949b9e0d387f20fb92260b", GitTreeState:"clean", BuildDate:"2018-04-12T14:14:26Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}
Using rke version v0.1.6

Answer 1

this was a regression fixed in 1.10.3 in https://github.com/kubernetes/kubernetes/pull/62633