mirror of https://github.com/k3s-io/k3s
119 lines
3.2 KiB
Go
119 lines
3.2 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package alwayspullimages
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import (
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"testing"
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"k8s.io/kubernetes/pkg/admission"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/runtime"
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)
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// TestAdmission verifies all create requests for pods result in every container's image pull policy
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// set to Always
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func TestAdmission(t *testing.T) {
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namespace := "test"
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handler := &alwaysPullImages{}
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pod := api.Pod{
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ObjectMeta: api.ObjectMeta{Name: "123", Namespace: namespace},
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Spec: api.PodSpec{
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Containers: []api.Container{
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{Name: "ctr1", Image: "image"},
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{Name: "ctr2", Image: "image", ImagePullPolicy: api.PullNever},
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{Name: "ctr3", Image: "image", ImagePullPolicy: api.PullIfNotPresent},
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{Name: "ctr4", Image: "image", ImagePullPolicy: api.PullAlways},
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},
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},
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}
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err := handler.Admit(admission.NewAttributesRecord(&pod, api.Kind("Pod"), pod.Namespace, pod.Name, api.Resource("pods"), "", admission.Create, nil))
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if err != nil {
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t.Errorf("Unexpected error returned from admission handler")
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}
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for _, c := range pod.Spec.Containers {
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if c.ImagePullPolicy != api.PullAlways {
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t.Errorf("Container %v: expected pull always, got %v", c, c.ImagePullPolicy)
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}
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}
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}
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// TestOtherResources ensures that this admission controller is a no-op for other resources,
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// subresources, and non-pods.
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func TestOtherResources(t *testing.T) {
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namespace := "testnamespace"
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name := "testname"
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pod := &api.Pod{
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ObjectMeta: api.ObjectMeta{Name: name, Namespace: namespace},
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Spec: api.PodSpec{
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Containers: []api.Container{
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{Name: "ctr2", Image: "image", ImagePullPolicy: api.PullNever},
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},
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},
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}
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tests := []struct {
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name string
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kind string
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resource string
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subresource string
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object runtime.Object
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expectError bool
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}{
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{
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name: "non-pod resource",
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kind: "Foo",
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resource: "foos",
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object: pod,
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},
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{
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name: "pod subresource",
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kind: "Pod",
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resource: "pods",
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subresource: "exec",
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object: pod,
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},
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{
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name: "non-pod object",
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kind: "Pod",
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resource: "pods",
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object: &api.Service{},
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expectError: true,
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},
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}
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for _, tc := range tests {
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handler := &alwaysPullImages{}
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err := handler.Admit(admission.NewAttributesRecord(tc.object, api.Kind(tc.kind), namespace, name, api.Resource(tc.resource), tc.subresource, admission.Create, nil))
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if tc.expectError {
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if err == nil {
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t.Errorf("%s: unexpected nil error", tc.name)
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}
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continue
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}
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if err != nil {
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t.Errorf("%s: unexpected error: %v", tc.name, err)
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continue
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}
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if e, a := api.PullNever, pod.Spec.Containers[0].ImagePullPolicy; e != a {
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t.Errorf("%s: image pull policy was changed to %s", tc.name, a)
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}
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}
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}
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