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pod_admission.go
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pod_admission.go
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/*
Copyright 2019 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package node
import (
"context"
"github.com/onsi/ginkgo"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/kubernetes/test/e2e/framework"
e2enode "k8s.io/kubernetes/test/e2e/framework/node"
e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
e2eskipper "k8s.io/kubernetes/test/e2e/framework/skipper"
imageutils "k8s.io/kubernetes/test/utils/image"
)
var _ = SIGDescribe("PodOSRejection [NodeConformance]", func() {
f := framework.NewDefaultFramework("pod-os-rejection")
ginkgo.Context("Kubelet", func() {
ginkgo.It("should reject pod when the node OS doesn't match pod's OS", func() {
linuxNode, err := findLinuxNode(f)
framework.ExpectNoError(err)
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: "wrong-pod-os",
Namespace: f.Namespace.Name,
},
Spec: v1.PodSpec{
OS: &v1.PodOS{
Name: "windows", // explicitly set the pod OS to a wrong but valid value
},
Containers: []v1.Container{
{
Name: "wrong-pod-os",
Image: imageutils.GetPauseImageName(),
},
},
NodeName: linuxNode.Name, // Set the node to an node which doesn't support
},
}
pod = f.PodClient().Create(pod)
// Check the pod is still not running
err = e2epod.WaitForPodFailedReason(f.ClientSet, pod, "PodOSNotSupported", f.Timeouts.PodStartShort)
framework.ExpectNoError(err)
})
})
})
// findLinuxNode finds a Linux node that is Ready and Schedulable
func findLinuxNode(f *framework.Framework) (v1.Node, error) {
selector := labels.Set{"kubernetes.io/os": "linux"}.AsSelector()
nodeList, err := f.ClientSet.CoreV1().Nodes().List(context.TODO(), metav1.ListOptions{LabelSelector: selector.String()})
if err != nil {
return v1.Node{}, err
}
var targetNode v1.Node
foundNode := false
for _, n := range nodeList.Items {
if e2enode.IsNodeReady(&n) && e2enode.IsNodeSchedulable(&n) {
targetNode = n
foundNode = true
break
}
}
if foundNode == false {
e2eskipper.Skipf("Could not find and ready and schedulable Linux nodes")
}
return targetNode, nil
}