608 lines
28 KiB
Go
608 lines
28 KiB
Go
/*
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Copyright 2022 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 csimock
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import (
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"context"
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"fmt"
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"sort"
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"strings"
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"sync/atomic"
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"time"
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"github.com/onsi/ginkgo/v2"
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"github.com/onsi/gomega"
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v1 "k8s.io/api/core/v1"
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metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
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"k8s.io/apimachinery/pkg/fields"
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"k8s.io/apimachinery/pkg/util/sets"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/component-base/metrics/testutil"
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"k8s.io/kubernetes/pkg/apis/core/v1/helper"
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"k8s.io/kubernetes/pkg/features"
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"k8s.io/kubernetes/pkg/kubelet/events"
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"k8s.io/kubernetes/test/e2e/feature"
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"k8s.io/kubernetes/test/e2e/framework"
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e2eevents "k8s.io/kubernetes/test/e2e/framework/events"
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e2emetrics "k8s.io/kubernetes/test/e2e/framework/metrics"
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e2epod "k8s.io/kubernetes/test/e2e/framework/pod"
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e2eskipper "k8s.io/kubernetes/test/e2e/framework/skipper"
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"k8s.io/kubernetes/test/e2e/storage/utils"
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admissionapi "k8s.io/pod-security-admission/api"
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)
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// Tests for SELinuxMount feature.
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// KEP: https://github.com/kubernetes/enhancements/tree/master/keps/sig-storage/1710-selinux-relabeling
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// There are two feature gates: SELinuxMountReadWriteOncePod and SELinuxMount.
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// These tags are used in the tests:
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//
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// [FeatureGate:SELinuxMountReadWriteOncePod]
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// - The test requires SELinuxMountReadWriteOncePod enabled.
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//
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// [FeatureGate:SELinuxMountReadWriteOncePod] [Feature:SELinuxMountReadWriteOncePodOnly]
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// - The test requires SELinuxMountReadWriteOncePod enabled and SELinuxMount disabled. This checks metrics that are emitted only when SELinuxMount is disabled.
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//
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// [FeatureGate:SELinuxMountReadWriteOncePod] [FeatureGate:SELinuxMount]
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// - The test requires SELinuxMountReadWriteOncePod and SELinuxMount enabled.
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var _ = utils.SIGDescribe("CSI Mock selinux on mount", func() {
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f := framework.NewDefaultFramework("csi-mock-volumes-selinux")
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f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged
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m := newMockDriverSetup(f)
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f.Context("SELinuxMount [LinuxOnly]", feature.SELinux, func() {
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// Make sure all options are set so system specific defaults are not used.
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seLinuxOpts1 := v1.SELinuxOptions{
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User: "system_u",
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Role: "system_r",
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Type: "container_t",
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Level: "s0:c0,c1",
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}
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seLinuxMountOption1 := "context=\"system_u:object_r:container_file_t:s0:c0,c1\""
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seLinuxOpts2 := v1.SELinuxOptions{
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User: "system_u",
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Role: "system_r",
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Type: "container_t",
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Level: "s0:c98,c99",
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}
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seLinuxMountOption2 := "context=\"system_u:object_r:container_file_t:s0:c98,c99\""
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tests := []struct {
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name string
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csiDriverSELinuxEnabled bool
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firstPodSELinuxOpts *v1.SELinuxOptions
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startSecondPod bool
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secondPodSELinuxOpts *v1.SELinuxOptions
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mountOptions []string
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volumeMode v1.PersistentVolumeAccessMode
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expectedFirstMountOptions []string
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expectedSecondMountOptions []string
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expectedUnstage bool
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testTags []interface{}
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}{
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// Start just a single pod and check its volume is mounted correctly
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{
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name: "should pass SELinux mount option for RWOP volume and Pod with SELinux context set",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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volumeMode: v1.ReadWriteOncePod,
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expectedFirstMountOptions: []string{seLinuxMountOption1},
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod)},
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},
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{
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name: "should add SELinux mount option to existing mount options",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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mountOptions: []string{"noexec", "noatime"},
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volumeMode: v1.ReadWriteOncePod,
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expectedFirstMountOptions: []string{"noexec", "noatime", seLinuxMountOption1},
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod)},
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},
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{
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name: "should not pass SELinux mount option for RWO volume with SELinuxMount disabled",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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volumeMode: v1.ReadWriteOnce,
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expectedFirstMountOptions: nil,
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod), feature.SELinuxMountReadWriteOncePodOnly},
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},
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{
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name: "should pass SELinux mount option for RWO volume with SELinuxMount enabled",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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volumeMode: v1.ReadWriteOnce,
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expectedFirstMountOptions: []string{seLinuxMountOption1},
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod), framework.WithFeatureGate(features.SELinuxMount)},
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},
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{
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name: "should not pass SELinux mount option for Pod without SELinux context",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: nil,
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volumeMode: v1.ReadWriteOncePod,
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expectedFirstMountOptions: nil,
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod)},
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},
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{
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name: "should not pass SELinux mount option for CSI driver that does not support SELinux mount",
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csiDriverSELinuxEnabled: false,
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firstPodSELinuxOpts: &seLinuxOpts1,
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volumeMode: v1.ReadWriteOncePod,
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expectedFirstMountOptions: nil,
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod)},
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},
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// Start two pods in a sequence and check their volume is / is not unmounted in between
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{
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name: "should not unstage RWOP volume when starting a second pod with the same SELinux context",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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startSecondPod: true,
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secondPodSELinuxOpts: &seLinuxOpts1,
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volumeMode: v1.ReadWriteOncePod,
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expectedFirstMountOptions: []string{seLinuxMountOption1},
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expectedSecondMountOptions: []string{seLinuxMountOption1},
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expectedUnstage: false,
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod)},
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},
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{
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name: "should unstage RWOP volume when starting a second pod with different SELinux context",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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startSecondPod: true,
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secondPodSELinuxOpts: &seLinuxOpts2,
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volumeMode: v1.ReadWriteOncePod,
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expectedFirstMountOptions: []string{seLinuxMountOption1},
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expectedSecondMountOptions: []string{seLinuxMountOption2},
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expectedUnstage: true,
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod)},
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},
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{
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name: "should not unstage RWO volume when starting a second pod with the same SELinux context",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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startSecondPod: true,
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secondPodSELinuxOpts: &seLinuxOpts1,
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volumeMode: v1.ReadWriteOnce,
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expectedFirstMountOptions: []string{seLinuxMountOption1},
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expectedSecondMountOptions: []string{seLinuxMountOption1},
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expectedUnstage: false,
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod), framework.WithFeatureGate(features.SELinuxMount)},
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},
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{
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name: "should unstage RWO volume when starting a second pod with different SELinux context",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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startSecondPod: true,
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secondPodSELinuxOpts: &seLinuxOpts2,
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volumeMode: v1.ReadWriteOnce,
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expectedFirstMountOptions: []string{seLinuxMountOption1},
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expectedSecondMountOptions: []string{seLinuxMountOption2},
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expectedUnstage: true,
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod), framework.WithFeatureGate(features.SELinuxMount)},
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},
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}
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for _, t := range tests {
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t := t
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testFunc := func(ctx context.Context) {
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if framework.NodeOSDistroIs("windows") {
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e2eskipper.Skipf("SELinuxMount is only applied on linux nodes -- skipping")
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}
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var nodeStageMountOpts, nodePublishMountOpts []string
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var unstageCalls, stageCalls, unpublishCalls, publishCalls atomic.Int32
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m.init(ctx, testParameters{
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disableAttach: true,
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registerDriver: true,
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enableSELinuxMount: &t.csiDriverSELinuxEnabled,
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hooks: createSELinuxMountPreHook(&nodeStageMountOpts, &nodePublishMountOpts, &stageCalls, &unstageCalls, &publishCalls, &unpublishCalls),
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})
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ginkgo.DeferCleanup(m.cleanup)
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// Act
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ginkgo.By("Starting the initial pod")
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accessModes := []v1.PersistentVolumeAccessMode{t.volumeMode}
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_, claim, pod := m.createPodWithSELinux(ctx, accessModes, t.mountOptions, t.firstPodSELinuxOpts)
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err := e2epod.WaitForPodNameRunningInNamespace(ctx, m.cs, pod.Name, pod.Namespace)
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framework.ExpectNoError(err, "starting the initial pod")
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// Assert
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ginkgo.By("Checking the initial pod mount options")
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gomega.Expect(nodeStageMountOpts).To(gomega.Equal(t.expectedFirstMountOptions), "NodeStage MountFlags for the initial pod")
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gomega.Expect(nodePublishMountOpts).To(gomega.Equal(t.expectedFirstMountOptions), "NodePublish MountFlags for the initial pod")
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ginkgo.By("Checking the CSI driver calls for the initial pod")
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gomega.Expect(unstageCalls.Load()).To(gomega.BeNumerically("==", 0), "NodeUnstage call count for the initial pod")
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gomega.Expect(unpublishCalls.Load()).To(gomega.BeNumerically("==", 0), "NodeUnpublish call count for the initial pod")
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gomega.Expect(stageCalls.Load()).To(gomega.BeNumerically(">", 0), "NodeStage for the initial pod")
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gomega.Expect(publishCalls.Load()).To(gomega.BeNumerically(">", 0), "NodePublish for the initial pod")
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if !t.startSecondPod {
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return
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}
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// Arrange 2nd part of the test
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ginkgo.By("Starting the second pod to check if a volume used by the initial pod is / is not unmounted based on SELinux context")
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// count fresh CSI driver calls between the first and the second pod
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nodeStageMountOpts = nil
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nodePublishMountOpts = nil
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unstageCalls.Store(0)
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unpublishCalls.Store(0)
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stageCalls.Store(0)
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publishCalls.Store(0)
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// Skip scheduler, it would block scheduling the second pod with ReadWriteOncePod PV.
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pod, err = m.cs.CoreV1().Pods(pod.Namespace).Get(ctx, pod.Name, metav1.GetOptions{})
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framework.ExpectNoError(err, "getting the initial pod")
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nodeSelection := e2epod.NodeSelection{Name: pod.Spec.NodeName}
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pod2, err := startPausePodWithSELinuxOptions(f.ClientSet, claim, nodeSelection, f.Namespace.Name, t.secondPodSELinuxOpts)
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framework.ExpectNoError(err, "creating second pod with SELinux context %s", t.secondPodSELinuxOpts)
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m.pods = append(m.pods, pod2)
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// Delete the initial pod only after kubelet processes the second pod and adds its volumes to
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// DesiredStateOfWorld.
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// In this state, any volume UnPublish / UnStage must be done because of SELinux contexts and not
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// because of random races because volumes of the second pod are not in DesiredStateOfWorld yet.
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ginkgo.By("Waiting for the second pod to start (or fail to start because of ReadWriteOncePod).")
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reason := events.FailedMountVolume
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var msg string
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if t.expectedUnstage {
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// This message is emitted before kubelet checks for ReadWriteOncePod
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msg = "conflicting SELinux labels of volume"
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} else {
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// Kubelet should re-use staged volume.
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if t.volumeMode == v1.ReadWriteOncePod {
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// Wait for the second pod to get stuck because of RWOP.
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msg = "volume uses the ReadWriteOncePod access mode and is already in use by another pod"
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} else {
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// There is nothing blocking the second pod from starting, wait for the second pod to fullly start.
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reason = string(events.StartedContainer)
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msg = "Started container"
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}
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}
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eventSelector := fields.Set{
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"involvedObject.kind": "Pod",
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"involvedObject.name": pod2.Name,
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"involvedObject.namespace": pod2.Namespace,
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"reason": reason,
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}.AsSelector().String()
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err = e2eevents.WaitTimeoutForEvent(ctx, m.cs, pod2.Namespace, eventSelector, msg, f.Timeouts.PodStart)
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framework.ExpectNoError(err, "waiting for event %q in the second test pod", msg)
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// Act 2nd part of the test
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ginkgo.By("Deleting the initial pod")
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err = e2epod.DeletePodWithWait(ctx, m.cs, pod)
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framework.ExpectNoError(err, "deleting the initial pod")
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// Assert 2nd part of the test
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ginkgo.By("Waiting for the second pod to start")
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err = e2epod.WaitForPodNameRunningInNamespace(ctx, m.cs, pod2.Name, pod2.Namespace)
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framework.ExpectNoError(err, "starting the second pod")
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ginkgo.By("Checking CSI driver calls for the second pod")
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if t.expectedUnstage {
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// Volume should be fully unstaged between the first and the second pod
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gomega.Expect(unstageCalls.Load()).To(gomega.BeNumerically(">", 0), "NodeUnstage calls after the first pod is deleted")
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gomega.Expect(stageCalls.Load()).To(gomega.BeNumerically(">", 0), "NodeStage calls for the second pod")
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// The second pod got the right mount option
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gomega.Expect(nodeStageMountOpts).To(gomega.Equal(t.expectedSecondMountOptions), "NodeStage MountFlags for the second pod")
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} else {
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// Volume should not be fully unstaged between the first and the second pod
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gomega.Expect(unstageCalls.Load()).To(gomega.BeNumerically("==", 0), "NodeUnstage calls after the first pod is deleted")
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gomega.Expect(stageCalls.Load()).To(gomega.BeNumerically("==", 0), "NodeStage calls for the second pod")
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}
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// In both cases, Unublish and Publish is called, with the right mount opts
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gomega.Expect(unpublishCalls.Load()).To(gomega.BeNumerically(">", 0), "NodeUnpublish calls after the first pod is deleted")
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gomega.Expect(publishCalls.Load()).To(gomega.BeNumerically(">", 0), "NodePublish calls for the second pod")
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gomega.Expect(nodePublishMountOpts).To(gomega.Equal(t.expectedSecondMountOptions), "NodePublish MountFlags for the second pod")
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}
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// t.testTags is array and it's not possible to use It("name", func(){}, t.testTags...)
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// Compose It() arguments separately.
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args := []interface{}{
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t.name,
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testFunc,
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}
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args = append(args, t.testTags...)
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framework.It(args...)
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}
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})
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})
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var (
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// SELinux metrics that have volume_plugin and access_mode labels
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metricsWithVolumePluginLabel = sets.New[string](
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"volume_manager_selinux_volume_context_mismatch_errors_total",
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"volume_manager_selinux_volume_context_mismatch_warnings_total",
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"volume_manager_selinux_volumes_admitted_total",
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)
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// SELinuxMetrics that have only access_mode label
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metricsWithoutVolumePluginLabel = sets.New[string](
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"volume_manager_selinux_container_errors_total",
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"volume_manager_selinux_container_warnings_total",
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"volume_manager_selinux_pod_context_mismatch_errors_total",
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"volume_manager_selinux_pod_context_mismatch_warnings_total",
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)
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// All SELinux metrics
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allMetrics = metricsWithoutVolumePluginLabel.Union(metricsWithVolumePluginLabel)
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)
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var _ = utils.SIGDescribe("CSI Mock selinux on mount metrics", func() {
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f := framework.NewDefaultFramework("csi-mock-volumes-selinux-metrics")
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f.NamespacePodSecurityLevel = admissionapi.LevelPrivileged
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m := newMockDriverSetup(f)
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// [Serial]: the tests read global kube-controller-manager metrics, so no other test changes them in parallel.
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f.Context("SELinuxMount metrics [LinuxOnly]", feature.SELinux, f.WithSerial(), func() {
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// Make sure all options are set so system specific defaults are not used.
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seLinuxOpts1 := v1.SELinuxOptions{
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User: "system_u",
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Role: "system_r",
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Type: "container_t",
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Level: "s0:c0,c1",
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}
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seLinuxOpts2 := v1.SELinuxOptions{
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User: "system_u",
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Role: "system_r",
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Type: "container_t",
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Level: "s0:c98,c99",
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}
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tests := []struct {
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name string
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csiDriverSELinuxEnabled bool
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firstPodSELinuxOpts *v1.SELinuxOptions
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secondPodSELinuxOpts *v1.SELinuxOptions
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volumeMode v1.PersistentVolumeAccessMode
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waitForSecondPodStart bool
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secondPodFailureEvent string
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expectIncreases sets.Set[string]
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testTags []interface{}
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}{
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{
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name: "warning is not bumped on two Pods with the same context on RWO volume",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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secondPodSELinuxOpts: &seLinuxOpts1,
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volumeMode: v1.ReadWriteOnce,
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waitForSecondPodStart: true,
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expectIncreases: sets.New[string]( /* no metric is increased, admitted_total was already increased when the first pod started */ ),
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod), feature.SELinuxMountReadWriteOncePodOnly},
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},
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{
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name: "warning is bumped on two Pods with a different context on RWO volume",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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secondPodSELinuxOpts: &seLinuxOpts2,
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volumeMode: v1.ReadWriteOnce,
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waitForSecondPodStart: true,
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expectIncreases: sets.New[string]("volume_manager_selinux_volume_context_mismatch_warnings_total"),
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod), feature.SELinuxMountReadWriteOncePodOnly},
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},
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{
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name: "error is not bumped on two Pods with the same context on RWO volume and SELinuxMount enabled",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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secondPodSELinuxOpts: &seLinuxOpts1,
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volumeMode: v1.ReadWriteOnce,
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waitForSecondPodStart: true,
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expectIncreases: sets.New[string]( /* no metric is increased, admitted_total was already increased when the first pod started */ ),
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testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod), framework.WithFeatureGate(features.SELinuxMount)},
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},
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{
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name: "error is bumped on two Pods with a different context on RWO volume and SELinuxMount enabled",
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csiDriverSELinuxEnabled: true,
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firstPodSELinuxOpts: &seLinuxOpts1,
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secondPodSELinuxOpts: &seLinuxOpts2,
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secondPodFailureEvent: "conflicting SELinux labels of volume",
|
|
volumeMode: v1.ReadWriteOnce,
|
|
waitForSecondPodStart: false,
|
|
expectIncreases: sets.New[string]("volume_manager_selinux_volume_context_mismatch_errors_total"),
|
|
testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod), framework.WithFeatureGate(features.SELinuxMount)},
|
|
},
|
|
{
|
|
name: "error is bumped on two Pods with a different context on RWX volume and SELinuxMount enabled",
|
|
csiDriverSELinuxEnabled: true,
|
|
firstPodSELinuxOpts: &seLinuxOpts1,
|
|
secondPodSELinuxOpts: &seLinuxOpts2,
|
|
secondPodFailureEvent: "conflicting SELinux labels of volume",
|
|
volumeMode: v1.ReadWriteMany,
|
|
waitForSecondPodStart: false,
|
|
expectIncreases: sets.New[string]("volume_manager_selinux_volume_context_mismatch_errors_total"),
|
|
testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod), framework.WithFeatureGate(features.SELinuxMount)},
|
|
},
|
|
{
|
|
name: "error is bumped on two Pods with a different context on RWOP volume",
|
|
csiDriverSELinuxEnabled: true,
|
|
firstPodSELinuxOpts: &seLinuxOpts1,
|
|
secondPodSELinuxOpts: &seLinuxOpts2,
|
|
secondPodFailureEvent: "conflicting SELinux labels of volume",
|
|
volumeMode: v1.ReadWriteOncePod,
|
|
waitForSecondPodStart: false,
|
|
expectIncreases: sets.New[string]("volume_manager_selinux_volume_context_mismatch_errors_total"),
|
|
testTags: []interface{}{framework.WithFeatureGate(features.SELinuxMountReadWriteOncePod)},
|
|
},
|
|
}
|
|
for _, t := range tests {
|
|
t := t
|
|
testFunc := func(ctx context.Context) {
|
|
// Some metrics use CSI driver name as a label, which is "csi-mock-" + the namespace name.
|
|
volumePluginLabel := "volume_plugin=\"kubernetes.io/csi/csi-mock-" + f.Namespace.Name + "\""
|
|
|
|
if framework.NodeOSDistroIs("windows") {
|
|
e2eskipper.Skipf("SELinuxMount is only applied on linux nodes -- skipping")
|
|
}
|
|
grabber, err := e2emetrics.NewMetricsGrabber(ctx, f.ClientSet, nil, f.ClientConfig(), true, false, false, false, false, false)
|
|
framework.ExpectNoError(err, "creating the metrics grabber")
|
|
|
|
var nodeStageMountOpts, nodePublishMountOpts []string
|
|
var unstageCalls, stageCalls, unpublishCalls, publishCalls atomic.Int32
|
|
m.init(ctx, testParameters{
|
|
disableAttach: true,
|
|
registerDriver: true,
|
|
enableSELinuxMount: &t.csiDriverSELinuxEnabled,
|
|
hooks: createSELinuxMountPreHook(&nodeStageMountOpts, &nodePublishMountOpts, &stageCalls, &unstageCalls, &publishCalls, &unpublishCalls),
|
|
})
|
|
ginkgo.DeferCleanup(m.cleanup)
|
|
|
|
ginkgo.By("Starting the first pod")
|
|
accessModes := []v1.PersistentVolumeAccessMode{t.volumeMode}
|
|
_, claim, pod := m.createPodWithSELinux(ctx, accessModes, []string{}, t.firstPodSELinuxOpts)
|
|
err = e2epod.WaitForPodNameRunningInNamespace(ctx, m.cs, pod.Name, pod.Namespace)
|
|
framework.ExpectNoError(err, "starting the initial pod")
|
|
|
|
ginkgo.By("Grabbing initial metrics")
|
|
pod, err = m.cs.CoreV1().Pods(pod.Namespace).Get(ctx, pod.Name, metav1.GetOptions{})
|
|
framework.ExpectNoError(err, "getting the initial pod")
|
|
metrics, err := grabMetrics(ctx, grabber, pod.Spec.NodeName, allMetrics, volumePluginLabel)
|
|
framework.ExpectNoError(err, "collecting the initial metrics")
|
|
dumpMetrics(metrics)
|
|
|
|
// Act
|
|
ginkgo.By("Starting the second pod")
|
|
// Skip scheduler, it would block scheduling the second pod with ReadWriteOncePod PV.
|
|
nodeSelection := e2epod.NodeSelection{Name: pod.Spec.NodeName}
|
|
pod2, err := startPausePodWithSELinuxOptions(f.ClientSet, claim, nodeSelection, f.Namespace.Name, t.secondPodSELinuxOpts)
|
|
framework.ExpectNoError(err, "creating second pod with SELinux context %s", t.secondPodSELinuxOpts)
|
|
m.pods = append(m.pods, pod2)
|
|
|
|
if t.waitForSecondPodStart {
|
|
err := e2epod.WaitForPodNameRunningInNamespace(ctx, m.cs, pod2.Name, pod2.Namespace)
|
|
framework.ExpectNoError(err, "starting the second pod")
|
|
} else {
|
|
ginkgo.By("Waiting for the second pod to fail to start")
|
|
eventSelector := fields.Set{
|
|
"involvedObject.kind": "Pod",
|
|
"involvedObject.name": pod2.Name,
|
|
"involvedObject.namespace": pod2.Namespace,
|
|
"reason": events.FailedMountVolume,
|
|
}.AsSelector().String()
|
|
err = e2eevents.WaitTimeoutForEvent(ctx, m.cs, pod2.Namespace, eventSelector, t.secondPodFailureEvent, f.Timeouts.PodStart)
|
|
framework.ExpectNoError(err, "waiting for event %q in the second test pod", t.secondPodFailureEvent)
|
|
}
|
|
|
|
// Assert: count the metrics
|
|
expectIncreaseWithLabels := addLabels(t.expectIncreases, volumePluginLabel, t.volumeMode)
|
|
framework.Logf("Waiting for changes of metrics %+v", expectIncreaseWithLabels)
|
|
err = waitForMetricIncrease(ctx, grabber, pod.Spec.NodeName, volumePluginLabel, allMetrics, expectIncreaseWithLabels, metrics, framework.PodStartShortTimeout)
|
|
framework.ExpectNoError(err, "waiting for metrics %s to increase", t.expectIncreases)
|
|
}
|
|
// t.testTags is array and it's not possible to use It("name", func(){xxx}, t.testTags...)
|
|
// Compose It() arguments separately.
|
|
args := []interface{}{
|
|
t.name,
|
|
testFunc,
|
|
}
|
|
args = append(args, t.testTags...)
|
|
framework.It(args...)
|
|
}
|
|
})
|
|
})
|
|
|
|
func grabMetrics(ctx context.Context, grabber *e2emetrics.Grabber, nodeName string, metricNames sets.Set[string], volumePluginLabel string) (map[string]float64, error) {
|
|
response, err := grabber.GrabFromKubelet(ctx, nodeName)
|
|
framework.ExpectNoError(err)
|
|
|
|
metrics := map[string]float64{}
|
|
for _, samples := range response {
|
|
if len(samples) == 0 {
|
|
continue
|
|
}
|
|
// For each metric + label combination, remember the last sample
|
|
for i := range samples {
|
|
// E.g. "volume_manager_selinux_pod_context_mismatch_errors_total"
|
|
metricName := samples[i].Metric[testutil.MetricNameLabel]
|
|
if metricNames.Has(string(metricName)) {
|
|
// E.g. "volume_manager_selinux_pod_context_mismatch_errors_total{access_mode="RWOP",volume_plugin="kubernetes.io/csi/csi-mock-ns"}
|
|
metricNameWithLabels := samples[i].Metric.String()
|
|
// Filter out metrics of any other volume plugin
|
|
if strings.Contains(metricNameWithLabels, "volume_plugin=") && !strings.Contains(metricNameWithLabels, volumePluginLabel) {
|
|
continue
|
|
}
|
|
// Overwrite any previous value, so only the last one is stored.
|
|
metrics[metricNameWithLabels] = float64(samples[i].Value)
|
|
}
|
|
}
|
|
}
|
|
|
|
return metrics, nil
|
|
}
|
|
|
|
func waitForMetricIncrease(ctx context.Context, grabber *e2emetrics.Grabber, nodeName string, volumePluginLabel string, allMetricNames, expectedIncreaseNames sets.Set[string], initialValues map[string]float64, timeout time.Duration) error {
|
|
var noIncreaseMetrics sets.Set[string]
|
|
var metrics map[string]float64
|
|
|
|
err := wait.Poll(time.Second, timeout, func() (bool, error) {
|
|
var err error
|
|
metrics, err = grabMetrics(ctx, grabber, nodeName, allMetricNames, volumePluginLabel)
|
|
if err != nil {
|
|
return false, err
|
|
}
|
|
|
|
noIncreaseMetrics = sets.New[string]()
|
|
// Always evaluate all SELinux metrics to check that the other metrics are not unexpectedly increased.
|
|
for name := range metrics {
|
|
if expectedIncreaseNames.Has(name) {
|
|
if metrics[name] <= initialValues[name] {
|
|
noIncreaseMetrics.Insert(name)
|
|
}
|
|
} else {
|
|
// Expect the metric to be stable
|
|
if initialValues[name] != metrics[name] {
|
|
return false, fmt.Errorf("metric %s unexpectedly increased to %v", name, metrics[name])
|
|
}
|
|
}
|
|
}
|
|
return noIncreaseMetrics.Len() == 0, nil
|
|
})
|
|
|
|
ginkgo.By("Dumping final metrics")
|
|
dumpMetrics(metrics)
|
|
|
|
if err == context.DeadlineExceeded {
|
|
return fmt.Errorf("timed out waiting for metrics %v", noIncreaseMetrics.UnsortedList())
|
|
}
|
|
return err
|
|
}
|
|
|
|
func dumpMetrics(metrics map[string]float64) {
|
|
// Print the metrics sorted by metric name for better readability
|
|
keys := make([]string, 0, len(metrics))
|
|
for key := range metrics {
|
|
keys = append(keys, key)
|
|
}
|
|
sort.Strings(keys)
|
|
|
|
for _, key := range keys {
|
|
framework.Logf("Metric %s: %v", key, metrics[key])
|
|
}
|
|
}
|
|
|
|
// Add labels to the metric name based on the current test case
|
|
func addLabels(metricNames sets.Set[string], volumePluginLabel string, accessMode v1.PersistentVolumeAccessMode) sets.Set[string] {
|
|
ret := sets.New[string]()
|
|
accessModeShortString := helper.GetAccessModesAsString([]v1.PersistentVolumeAccessMode{accessMode})
|
|
|
|
for metricName := range metricNames {
|
|
var metricWithLabels string
|
|
if metricsWithVolumePluginLabel.Has(metricName) {
|
|
metricWithLabels = fmt.Sprintf("%s{access_mode=\"%s\", %s}", metricName, accessModeShortString, volumePluginLabel)
|
|
} else {
|
|
metricWithLabels = fmt.Sprintf("%s{access_mode=\"%s\"}", metricName, accessModeShortString)
|
|
}
|
|
|
|
ret.Insert(metricWithLabels)
|
|
}
|
|
|
|
return ret
|
|
}
|