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c778d871e0
Automatic merge from submit-queue. 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>. add ut for kuberuntime-gc **What this PR does / why we need it**: Add ut for kuberuntime-gc to cover more situations: 1) Add two uncovered cases to test sandbox-gc (1) When there are more than one exited sandboxes,the older exited sandboxes without containers for existing pods should be garbage collected; (2) Even though there are more than one exited sandboxes,the older exited sandboxes with containers for existing pods should not be garbage collected. 2) Add one uncovered case to test container-gc (1) To cover the situation when allSourcesReady is set false; **Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: Fixes # **Special notes for your reviewer**: **Release note**: ```release-note "NONE" ```
443 lines
19 KiB
Go
443 lines
19 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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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 kuberuntime
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import (
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"os"
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"path/filepath"
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"testing"
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"time"
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"github.com/golang/mock/gomock"
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"github.com/stretchr/testify/assert"
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"k8s.io/api/core/v1"
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runtimeapi "k8s.io/kubernetes/pkg/kubelet/apis/cri/runtime/v1alpha2"
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kubecontainer "k8s.io/kubernetes/pkg/kubelet/container"
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containertest "k8s.io/kubernetes/pkg/kubelet/container/testing"
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)
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func TestSandboxGC(t *testing.T) {
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fakeRuntime, _, m, err := createTestRuntimeManager()
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assert.NoError(t, err)
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podStateProvider := m.containerGC.podStateProvider.(*fakePodStateProvider)
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makeGCSandbox := func(pod *v1.Pod, attempt uint32, state runtimeapi.PodSandboxState, withPodStateProvider bool, createdAt int64) sandboxTemplate {
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if withPodStateProvider {
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// initialize the pod getter
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podStateProvider.existingPods[pod.UID] = struct{}{}
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}
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return sandboxTemplate{
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pod: pod,
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state: state,
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attempt: attempt,
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createdAt: createdAt,
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}
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}
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pods := []*v1.Pod{
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makeTestPod("foo1", "new", "1234", []v1.Container{
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makeTestContainer("bar1", "busybox"),
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makeTestContainer("bar2", "busybox"),
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}),
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makeTestPod("foo2", "new", "5678", []v1.Container{
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makeTestContainer("bar3", "busybox"),
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}),
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makeTestPod("deleted", "new", "9012", []v1.Container{
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makeTestContainer("bar4", "busybox"),
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}),
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}
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for c, test := range []struct {
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description string // description of the test case
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sandboxes []sandboxTemplate // templates of sandboxes
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containers []containerTemplate // templates of containers
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remain []int // template indexes of remaining sandboxes
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evictTerminatedPods bool
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}{
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{
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description: "notready sandboxes without containers for deleted pods should be garbage collected.",
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sandboxes: []sandboxTemplate{
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makeGCSandbox(pods[2], 0, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, false, 0),
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},
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containers: []containerTemplate{},
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remain: []int{},
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evictTerminatedPods: false,
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},
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{
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description: "ready sandboxes without containers for deleted pods should not be garbage collected.",
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sandboxes: []sandboxTemplate{
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makeGCSandbox(pods[2], 0, runtimeapi.PodSandboxState_SANDBOX_READY, false, 0),
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},
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containers: []containerTemplate{},
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remain: []int{0},
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evictTerminatedPods: false,
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},
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{
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description: "sandboxes for existing pods should not be garbage collected.",
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sandboxes: []sandboxTemplate{
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makeGCSandbox(pods[0], 0, runtimeapi.PodSandboxState_SANDBOX_READY, true, 0),
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makeGCSandbox(pods[1], 0, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, true, 0),
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},
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containers: []containerTemplate{},
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remain: []int{0, 1},
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evictTerminatedPods: false,
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},
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{
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description: "older exited sandboxes without containers for existing pods should be garbage collected if there are more than one exited sandboxes.",
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sandboxes: []sandboxTemplate{
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makeGCSandbox(pods[0], 1, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, true, 1),
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makeGCSandbox(pods[0], 0, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, true, 0),
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},
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containers: []containerTemplate{},
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remain: []int{0},
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evictTerminatedPods: false,
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},
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{
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description: "older exited sandboxes with containers for existing pods should not be garbage collected even if there are more than one exited sandboxes.",
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sandboxes: []sandboxTemplate{
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makeGCSandbox(pods[0], 1, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, true, 1),
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makeGCSandbox(pods[0], 0, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, true, 0),
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},
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containers: []containerTemplate{
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{pod: pods[0], container: &pods[0].Spec.Containers[0], sandboxAttempt: 0, state: runtimeapi.ContainerState_CONTAINER_EXITED},
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},
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remain: []int{0, 1},
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evictTerminatedPods: false,
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},
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{
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description: "non-running sandboxes for existing pods should be garbage collected if evictTerminatedPods is set.",
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sandboxes: []sandboxTemplate{
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makeGCSandbox(pods[0], 0, runtimeapi.PodSandboxState_SANDBOX_READY, true, 0),
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makeGCSandbox(pods[1], 0, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, true, 0),
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},
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containers: []containerTemplate{},
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remain: []int{0},
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evictTerminatedPods: true,
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},
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{
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description: "sandbox with containers should not be garbage collected.",
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sandboxes: []sandboxTemplate{
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makeGCSandbox(pods[0], 0, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, false, 0),
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},
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containers: []containerTemplate{
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{pod: pods[0], container: &pods[0].Spec.Containers[0], state: runtimeapi.ContainerState_CONTAINER_EXITED},
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},
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remain: []int{0},
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evictTerminatedPods: false,
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},
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{
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description: "multiple sandboxes should be handled properly.",
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sandboxes: []sandboxTemplate{
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// running sandbox.
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makeGCSandbox(pods[0], 1, runtimeapi.PodSandboxState_SANDBOX_READY, true, 1),
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// exited sandbox without containers.
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makeGCSandbox(pods[0], 0, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, true, 0),
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// exited sandbox with containers.
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makeGCSandbox(pods[1], 1, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, true, 1),
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// exited sandbox without containers.
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makeGCSandbox(pods[1], 0, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, true, 0),
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// exited sandbox without containers for deleted pods.
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makeGCSandbox(pods[2], 0, runtimeapi.PodSandboxState_SANDBOX_NOTREADY, false, 0),
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},
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containers: []containerTemplate{
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{pod: pods[1], container: &pods[1].Spec.Containers[0], sandboxAttempt: 1, state: runtimeapi.ContainerState_CONTAINER_EXITED},
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},
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remain: []int{0, 2},
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evictTerminatedPods: false,
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},
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} {
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t.Logf("TestCase #%d: %+v", c, test)
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fakeSandboxes := makeFakePodSandboxes(t, m, test.sandboxes)
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fakeContainers := makeFakeContainers(t, m, test.containers)
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fakeRuntime.SetFakeSandboxes(fakeSandboxes)
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fakeRuntime.SetFakeContainers(fakeContainers)
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err := m.containerGC.evictSandboxes(test.evictTerminatedPods)
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assert.NoError(t, err)
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realRemain, err := fakeRuntime.ListPodSandbox(nil)
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assert.NoError(t, err)
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assert.Len(t, realRemain, len(test.remain))
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for _, remain := range test.remain {
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status, err := fakeRuntime.PodSandboxStatus(fakeSandboxes[remain].Id)
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assert.NoError(t, err)
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assert.Equal(t, &fakeSandboxes[remain].PodSandboxStatus, status)
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}
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}
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}
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func TestContainerGC(t *testing.T) {
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fakeRuntime, _, m, err := createTestRuntimeManager()
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assert.NoError(t, err)
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podStateProvider := m.containerGC.podStateProvider.(*fakePodStateProvider)
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makeGCContainer := func(podName, containerName string, attempt int, createdAt int64, state runtimeapi.ContainerState) containerTemplate {
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container := makeTestContainer(containerName, "test-image")
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pod := makeTestPod(podName, "test-ns", podName, []v1.Container{container})
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if podName == "running" {
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podStateProvider.runningPods[pod.UID] = struct{}{}
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}
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if podName != "deleted" {
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podStateProvider.existingPods[pod.UID] = struct{}{}
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}
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return containerTemplate{
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pod: pod,
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container: &container,
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attempt: attempt,
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createdAt: createdAt,
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state: state,
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}
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}
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defaultGCPolicy := kubecontainer.ContainerGCPolicy{MinAge: time.Hour, MaxPerPodContainer: 2, MaxContainers: 6}
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for c, test := range []struct {
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description string // description of the test case
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containers []containerTemplate // templates of containers
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policy *kubecontainer.ContainerGCPolicy // container gc policy
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remain []int // template indexes of remaining containers
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evictTerminatedPods bool
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allSourcesReady bool
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}{
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{
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description: "all containers should be removed when max container limit is 0",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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},
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policy: &kubecontainer.ContainerGCPolicy{MinAge: time.Minute, MaxPerPodContainer: 1, MaxContainers: 0},
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remain: []int{},
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evictTerminatedPods: false,
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allSourcesReady: true,
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},
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{
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description: "max containers should be complied when no max per pod container limit is set",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 4, 4, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 3, 3, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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},
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policy: &kubecontainer.ContainerGCPolicy{MinAge: time.Minute, MaxPerPodContainer: -1, MaxContainers: 4},
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remain: []int{0, 1, 2, 3},
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evictTerminatedPods: false,
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allSourcesReady: true,
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},
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{
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description: "no containers should be removed if both max container and per pod container limits are not set",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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},
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policy: &kubecontainer.ContainerGCPolicy{MinAge: time.Minute, MaxPerPodContainer: -1, MaxContainers: -1},
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remain: []int{0, 1, 2},
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evictTerminatedPods: false,
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allSourcesReady: true,
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},
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{
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description: "recently started containers should not be removed",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 2, time.Now().UnixNano(), runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 1, time.Now().UnixNano(), runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 0, time.Now().UnixNano(), runtimeapi.ContainerState_CONTAINER_EXITED),
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},
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remain: []int{0, 1, 2},
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evictTerminatedPods: false,
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allSourcesReady: true,
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},
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{
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description: "oldest containers should be removed when per pod container limit exceeded",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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},
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remain: []int{0, 1},
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evictTerminatedPods: false,
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allSourcesReady: true,
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},
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{
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description: "running containers should not be removed",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 0, 0, runtimeapi.ContainerState_CONTAINER_RUNNING),
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},
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remain: []int{0, 1, 2},
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evictTerminatedPods: false,
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allSourcesReady: true,
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},
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{
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description: "no containers should be removed when limits are not exceeded",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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},
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remain: []int{0, 1},
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evictTerminatedPods: false,
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allSourcesReady: true,
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},
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{
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description: "max container count should apply per (UID, container) pair",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo1", "baz", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo1", "baz", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo1", "baz", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo2", "bar", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo2", "bar", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo2", "bar", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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},
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remain: []int{0, 1, 3, 4, 6, 7},
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evictTerminatedPods: false,
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allSourcesReady: true,
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},
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{
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description: "max limit should apply and try to keep from every pod",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo1", "bar1", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo1", "bar1", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo2", "bar2", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo2", "bar2", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo3", "bar3", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo3", "bar3", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo4", "bar4", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo4", "bar4", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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},
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remain: []int{0, 2, 4, 6, 8},
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evictTerminatedPods: false,
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allSourcesReady: true,
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},
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{
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description: "oldest pods should be removed if limit exceeded",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo1", "bar1", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo1", "bar1", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo2", "bar2", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo3", "bar3", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo4", "bar4", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo5", "bar5", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo6", "bar6", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo7", "bar7", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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},
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remain: []int{0, 2, 4, 6, 8, 9},
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evictTerminatedPods: false,
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allSourcesReady: true,
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},
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{
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description: "all non-running containers should be removed when evictTerminatedPods is set",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo1", "bar1", 2, 2, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo1", "bar1", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("running", "bar2", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo3", "bar3", 0, 0, runtimeapi.ContainerState_CONTAINER_RUNNING),
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},
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remain: []int{4, 5},
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evictTerminatedPods: true,
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allSourcesReady: true,
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},
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{
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description: "containers for deleted pods should be removed",
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containers: []containerTemplate{
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makeGCContainer("foo", "bar", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("foo", "bar", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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// deleted pods still respect MinAge.
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makeGCContainer("deleted", "bar1", 2, time.Now().UnixNano(), runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("deleted", "bar1", 1, 1, runtimeapi.ContainerState_CONTAINER_EXITED),
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makeGCContainer("deleted", "bar1", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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},
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remain: []int{0, 1, 2},
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evictTerminatedPods: false,
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allSourcesReady: true,
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},
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{
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description: "containers for deleted pods may not be removed if allSourcesReady is set false ",
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containers: []containerTemplate{
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makeGCContainer("deleted", "bar1", 0, 0, runtimeapi.ContainerState_CONTAINER_EXITED),
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},
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remain: []int{0},
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evictTerminatedPods: true,
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allSourcesReady: false,
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},
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} {
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t.Logf("TestCase #%d: %+v", c, test)
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fakeContainers := makeFakeContainers(t, m, test.containers)
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|
fakeRuntime.SetFakeContainers(fakeContainers)
|
|
|
|
if test.policy == nil {
|
|
test.policy = &defaultGCPolicy
|
|
}
|
|
err := m.containerGC.evictContainers(*test.policy, test.allSourcesReady, test.evictTerminatedPods)
|
|
assert.NoError(t, err)
|
|
realRemain, err := fakeRuntime.ListContainers(nil)
|
|
assert.NoError(t, err)
|
|
assert.Len(t, realRemain, len(test.remain))
|
|
for _, remain := range test.remain {
|
|
status, err := fakeRuntime.ContainerStatus(fakeContainers[remain].Id)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, &fakeContainers[remain].ContainerStatus, status)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Notice that legacy container symlink is not tested since it may be deprecated soon.
|
|
func TestPodLogDirectoryGC(t *testing.T) {
|
|
_, _, m, err := createTestRuntimeManager()
|
|
assert.NoError(t, err)
|
|
fakeOS := m.osInterface.(*containertest.FakeOS)
|
|
podStateProvider := m.containerGC.podStateProvider.(*fakePodStateProvider)
|
|
|
|
// pod log directories without corresponding pods should be removed.
|
|
podStateProvider.existingPods["123"] = struct{}{}
|
|
podStateProvider.existingPods["456"] = struct{}{}
|
|
podStateProvider.runningPods["123"] = struct{}{}
|
|
podStateProvider.runningPods["456"] = struct{}{}
|
|
files := []string{"123", "456", "789", "012"}
|
|
removed := []string{filepath.Join(podLogsRootDirectory, "789"), filepath.Join(podLogsRootDirectory, "012")}
|
|
|
|
ctrl := gomock.NewController(t)
|
|
defer ctrl.Finish()
|
|
|
|
fakeOS.ReadDirFn = func(string) ([]os.FileInfo, error) {
|
|
var fileInfos []os.FileInfo
|
|
for _, file := range files {
|
|
mockFI := containertest.NewMockFileInfo(ctrl)
|
|
mockFI.EXPECT().Name().Return(file)
|
|
fileInfos = append(fileInfos, mockFI)
|
|
}
|
|
return fileInfos, nil
|
|
}
|
|
|
|
// allSourcesReady == true, pod log directories without corresponding pod should be removed.
|
|
err = m.containerGC.evictPodLogsDirectories(true)
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, removed, fakeOS.Removes)
|
|
|
|
// allSourcesReady == false, pod log directories should not be removed.
|
|
fakeOS.Removes = []string{}
|
|
err = m.containerGC.evictPodLogsDirectories(false)
|
|
assert.NoError(t, err)
|
|
assert.Empty(t, fakeOS.Removes)
|
|
}
|