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Merge pull request #58977 from Random-Liu/fix-pod-sandbox-privilege

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Automatic merge from submit-queue (batch tested with PRs 58777, 58978, 58977, 58775). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Fix pod sandbox privilege.

Fixes https://github.com/kubernetes/kubernetes/issues/58979.

In cri-containerd, we start enforcing that a privileged container can't be created in privileged sandbox in https://github.com/containerd/cri-containerd/pull/577.

However, after that the e2e-gci-device-plugin-gpu test starts failing. https://k8s-testgrid.appspot.com/sig-node-containerd#e2e-gci-device-plugin-gpu
```
I0128 06:49:09.117] Jan 28 06:49:09.086: INFO: At 2018-01-28 06:41:10 +0000 UTC - event for nvidia-driver-installer-5kkrz: {kubelet bootstrap-e2e-minion-group-7s2v} Failed: (combined from similar events): Error: failed to generate container "cfb9f4f01fc2685db6469d3f6348077b94d4aa577e2e6345bf890f8871ec80dd" spec: no privileged container allowed in sandbox
```

The reason is that kubelet doesn't check init container when setting sandbox privilege.

Signed-off-by: Lantao Liu <lantaol@google.com>

**Release note**:

```release-note
none.
```
@kubernetes/sig-node-bugs @yujuhong @feiskyer @mrunalp
This commit is contained in:
Kubernetes Submit Queue 2018-01-29 14:59:42 -08:00 committed by GitHub
commit b058b299c9
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2 changed files with 15 additions and 1 deletions
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2
pkg/kubelet/container/helpers.go
View File

@ -302,7 +302,7 @@ func GetContainerSpec(pod *v1.Pod, containerName string) *v1.Container {
// HasPrivilegedContainer returns true if any of the containers in the pod are privileged.
func HasPrivilegedContainer(pod *v1.Pod) bool {
for _, c := range pod.Spec.Containers {
for _, c := range append(pod.Spec.Containers, pod.Spec.InitContainers...) {
if c.SecurityContext != nil &&
c.SecurityContext.Privileged != nil &&
*c.SecurityContext.Privileged {

14
pkg/kubelet/container/helpers_test.go
View File

@ -254,6 +254,20 @@ func TestHasPrivilegedContainer(t *testing.T) {
t.Errorf("%s expected %t but got %t", k, v.expected, actual)
}
}
// Test init containers as well.
for k, v := range tests {
pod := &v1.Pod{
Spec: v1.PodSpec{
InitContainers: []v1.Container{
{SecurityContext: v.securityContext},
},
},
}
actual := HasPrivilegedContainer(pod)
if actual != v.expected {
t.Errorf("%s expected %t but got %t", k, v.expected, actual)
}
}
}
func TestMakePortMappings(t *testing.T) {