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Merge pull request #51404 from feiskyer/nonewprivs

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Automatic merge from submit-queue (batch tested with PRs 51425, 51404, 51459, 51504, 51488)

Admit NoNewPrivs for remote and rkt runtimes

**What this PR does / why we need it**:

#51347 is aiming to admit NoNewPrivis for remote container runtime, but it didn't actually solve the problem. See @miaoyq 's comments [here](https://github.com/kubernetes/kubernetes/pull/51347#discussion_r135379446).

This PR always admit NoNewPrivs for runtimes except docker, which should fix the problem.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: 

Fixes #51319.

**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```
This commit is contained in:
Kubernetes Submit Queue 2017-08-29 04:15:28 -07:00 committed by GitHub
commit 611036c8c3
1 changed files with 19 additions and 30 deletions
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49
pkg/kubelet/lifecycle/handlers.go
View File

@ -187,45 +187,34 @@ func (a *noNewPrivsAdmitHandler) Admit(attrs *PodAdmitAttributes) PodAdmitResult
return PodAdmitResult{Admit: true}
}
// Always admit for remote runtime.
if a.Runtime.Type() == kubetypes.RemoteContainerRuntime {
// Always admit runtimes except docker.
if a.Runtime.Type() != kubetypes.DockerContainerRuntime {
return PodAdmitResult{Admit: true}
}
// Make sure it is either docker or rkt runtimes.
if a.Runtime.Type() != kubetypes.DockerContainerRuntime && a.Runtime.Type() != kubetypes.RktContainerRuntime {
// Make sure docker api version is valid.
rversion, err := a.Runtime.APIVersion()
if err != nil {
return PodAdmitResult{
Admit: false,
Reason: "NoNewPrivs",
Message: fmt.Sprintf("Cannot enforce NoNewPrivs: %s runtime not supported", a.Runtime.Type()),
Message: fmt.Sprintf("Cannot enforce NoNewPrivs: %v", err),
}
}
if a.Runtime.Type() == kubetypes.DockerContainerRuntime {
// Make sure docker api version is valid.
rversion, err := a.Runtime.APIVersion()
if err != nil {
return PodAdmitResult{
Admit: false,
Reason: "NoNewPrivs",
Message: fmt.Sprintf("Cannot enforce NoNewPrivs: %v", err),
}
v, err := rversion.Compare("1.23.0")
if err != nil {
return PodAdmitResult{
Admit: false,
Reason: "NoNewPrivs",
Message: fmt.Sprintf("Cannot enforce NoNewPrivs: %v", err),
}
v, err := rversion.Compare("1.23.0")
if err != nil {
return PodAdmitResult{
Admit: false,
Reason: "NoNewPrivs",
Message: fmt.Sprintf("Cannot enforce NoNewPrivs: %v", err),
}
}
// If the version is less than 1.23 it will return -1 above.
if v == -1 {
return PodAdmitResult{
Admit: false,
Reason: "NoNewPrivs",
Message: fmt.Sprintf("Cannot enforce NoNewPrivs: docker runtime API version %q must be greater than or equal to 1.23", rversion.String()),
}
}
// If the version is less than 1.23 it will return -1 above.
if v == -1 {
return PodAdmitResult{
Admit: false,
Reason: "NoNewPrivs",
Message: fmt.Sprintf("Cannot enforce NoNewPrivs: docker runtime API version %q must be greater than or equal to 1.23", rversion.String()),
}
}