558 lines
18 KiB
Go
558 lines
18 KiB
Go
/*
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Copyright 2017 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 server
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import (
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"testing"
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imagespec "github.com/opencontainers/image-spec/specs-go/v1"
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runtimespec "github.com/opencontainers/runtime-spec/specs-go"
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"github.com/opencontainers/runtime-tools/generate"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"k8s.io/kubernetes/pkg/kubelet/apis/cri/v1alpha1/runtime"
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"github.com/kubernetes-incubator/cri-containerd/pkg/util"
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)
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func checkMount(t *testing.T, mounts []runtimespec.Mount, src, dest, typ string,
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contains, notcontains []string) {
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found := false
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for _, m := range mounts {
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if m.Source == src && m.Destination == dest {
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assert.Equal(t, m.Type, typ)
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for _, c := range contains {
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assert.Contains(t, m.Options, c)
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}
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for _, n := range notcontains {
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assert.NotContains(t, m.Options, n)
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}
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found = true
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break
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}
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}
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assert.True(t, found, "mount from %q to %q not found", src, dest)
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}
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func getCreateContainerTestData() (*runtime.ContainerConfig, *runtime.PodSandboxConfig,
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*imagespec.ImageConfig, func(*testing.T, string, uint32, *runtimespec.Spec)) {
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config := &runtime.ContainerConfig{
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Metadata: &runtime.ContainerMetadata{
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Name: "test-name",
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Attempt: 1,
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},
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Image: &runtime.ImageSpec{
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Image: "sha256:c75bebcdd211f41b3a460c7bf82970ed6c75acaab9cd4c9a4e125b03ca113799",
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},
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Command: []string{"test", "command"},
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Args: []string{"test", "args"},
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WorkingDir: "test-cwd",
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Envs: []*runtime.KeyValue{
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{Key: "k1", Value: "v1"},
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{Key: "k2", Value: "v2"},
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{Key: "k3", Value: "v3=v3bis"},
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{Key: "k4", Value: "v4=v4bis=foop"},
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},
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Mounts: []*runtime.Mount{
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// everything default
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{
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ContainerPath: "container-path-1",
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HostPath: "host-path-1",
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},
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// readOnly
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{
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ContainerPath: "container-path-2",
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HostPath: "host-path-2",
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Readonly: true,
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},
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// Propagation private
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{
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ContainerPath: "container-path-3",
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HostPath: "host-path-3",
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Propagation: runtime.MountPropagation_PROPAGATION_PRIVATE,
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},
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// Propagation rslave
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{
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ContainerPath: "container-path-4",
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HostPath: "host-path-4",
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Propagation: runtime.MountPropagation_PROPAGATION_HOST_TO_CONTAINER,
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},
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// Propagation rshared
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{
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ContainerPath: "container-path-5",
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HostPath: "host-path-5",
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Propagation: runtime.MountPropagation_PROPAGATION_BIDIRECTIONAL,
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},
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// Propagation unknown (falls back to private)
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{
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ContainerPath: "container-path-6",
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HostPath: "host-path-6",
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Propagation: runtime.MountPropagation(42),
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},
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// Everything
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{
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ContainerPath: "container-path-7",
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HostPath: "host-path-7",
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Readonly: true,
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Propagation: runtime.MountPropagation_PROPAGATION_BIDIRECTIONAL,
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},
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},
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Labels: map[string]string{"a": "b"},
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Annotations: map[string]string{"c": "d"},
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Linux: &runtime.LinuxContainerConfig{
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Resources: &runtime.LinuxContainerResources{
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CpuPeriod: 100,
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CpuQuota: 200,
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CpuShares: 300,
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MemoryLimitInBytes: 400,
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OomScoreAdj: 500,
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},
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SecurityContext: &runtime.LinuxContainerSecurityContext{
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SupplementalGroups: []int64{1111, 2222},
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NoNewPrivs: true,
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},
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},
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}
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sandboxConfig := &runtime.PodSandboxConfig{
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Metadata: &runtime.PodSandboxMetadata{
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Name: "test-sandbox-name",
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Uid: "test-sandbox-uid",
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Namespace: "test-sandbox-ns",
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Attempt: 2,
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},
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Linux: &runtime.LinuxPodSandboxConfig{
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CgroupParent: "/test/cgroup/parent",
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},
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}
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imageConfig := &imagespec.ImageConfig{
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Env: []string{"ik1=iv1", "ik2=iv2", "ik3=iv3=iv3bis", "ik4=iv4=iv4bis=boop"},
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Entrypoint: []string{"/entrypoint"},
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Cmd: []string{"cmd"},
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WorkingDir: "/workspace",
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}
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specCheck := func(t *testing.T, id string, sandboxPid uint32, spec *runtimespec.Spec) {
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assert.Equal(t, relativeRootfsPath, spec.Root.Path)
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assert.Equal(t, []string{"test", "command", "test", "args"}, spec.Process.Args)
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assert.Equal(t, "test-cwd", spec.Process.Cwd)
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assert.Contains(t, spec.Process.Env, "k1=v1", "k2=v2", "k3=v3=v3bis", "ik4=iv4=iv4bis=boop")
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assert.Contains(t, spec.Process.Env, "ik1=iv1", "ik2=iv2", "ik3=iv3=iv3bis", "k4=v4=v4bis=foop")
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t.Logf("Check cgroups bind mount")
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checkMount(t, spec.Mounts, "cgroup", "/sys/fs/cgroup", "cgroup", []string{"ro"}, nil)
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t.Logf("Check bind mount")
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checkMount(t, spec.Mounts, "host-path-1", "container-path-1", "bind", []string{"rbind", "rprivate", "rw"}, nil)
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checkMount(t, spec.Mounts, "host-path-2", "container-path-2", "bind", []string{"rbind", "rprivate", "ro"}, nil)
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checkMount(t, spec.Mounts, "host-path-3", "container-path-3", "bind", []string{"rbind", "rprivate", "rw"}, nil)
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checkMount(t, spec.Mounts, "host-path-4", "container-path-4", "bind", []string{"rbind", "rslave", "rw"}, nil)
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checkMount(t, spec.Mounts, "host-path-5", "container-path-5", "bind", []string{"rbind", "rshared", "rw"}, nil)
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checkMount(t, spec.Mounts, "host-path-6", "container-path-6", "bind", []string{"rbind", "rprivate", "rw"}, nil)
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checkMount(t, spec.Mounts, "host-path-7", "container-path-7", "bind", []string{"rbind", "rshared", "ro"}, nil)
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t.Logf("Check resource limits")
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assert.EqualValues(t, *spec.Linux.Resources.CPU.Period, 100)
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assert.EqualValues(t, *spec.Linux.Resources.CPU.Quota, 200)
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assert.EqualValues(t, *spec.Linux.Resources.CPU.Shares, 300)
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assert.EqualValues(t, *spec.Linux.Resources.Memory.Limit, 400)
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assert.EqualValues(t, *spec.Process.OOMScoreAdj, 500)
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t.Logf("Check supplemental groups")
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assert.Contains(t, spec.Process.User.AdditionalGids, uint32(1111))
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assert.Contains(t, spec.Process.User.AdditionalGids, uint32(2222))
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t.Logf("Check no_new_privs")
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assert.Equal(t, spec.Process.NoNewPrivileges, true)
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t.Logf("Check cgroup path")
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assert.Equal(t, getCgroupsPath("/test/cgroup/parent", id), spec.Linux.CgroupsPath)
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t.Logf("Check namespaces")
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assert.Contains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.NetworkNamespace,
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Path: getNetworkNamespace(sandboxPid),
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})
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assert.Contains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.IPCNamespace,
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Path: getIPCNamespace(sandboxPid),
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})
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assert.Contains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.UTSNamespace,
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Path: getUTSNamespace(sandboxPid),
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})
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}
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return config, sandboxConfig, imageConfig, specCheck
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}
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func TestGeneralContainerSpec(t *testing.T) {
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testID := "test-id"
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testPid := uint32(1234)
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config, sandboxConfig, imageConfig, specCheck := getCreateContainerTestData()
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c := newTestCRIContainerdService()
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spec, err := c.generateContainerSpec(testID, testPid, config, sandboxConfig, imageConfig, nil)
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assert.NoError(t, err)
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specCheck(t, testID, testPid, spec)
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}
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func TestContainerCapabilities(t *testing.T) {
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testID := "test-id"
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testPid := uint32(1234)
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config, sandboxConfig, imageConfig, specCheck := getCreateContainerTestData()
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c := newTestCRIContainerdService()
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for desc, test := range map[string]struct {
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capability *runtime.Capability
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includes []string
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excludes []string
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}{
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"should be able to add/drop capabilities": {
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capability: &runtime.Capability{
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AddCapabilities: []string{"SYS_ADMIN"},
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DropCapabilities: []string{"CHOWN"},
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},
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includes: []string{"CAP_SYS_ADMIN"},
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excludes: []string{"CAP_CHOWN"},
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},
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"should be able to add all capabilities": {
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capability: &runtime.Capability{
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AddCapabilities: []string{"ALL"},
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},
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includes: getOCICapabilitiesList(),
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},
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"should be able to drop all capabilities": {
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capability: &runtime.Capability{
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DropCapabilities: []string{"ALL"},
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},
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excludes: getOCICapabilitiesList(),
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},
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"should be able to drop capabilities with add all": {
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capability: &runtime.Capability{
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AddCapabilities: []string{"ALL"},
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DropCapabilities: []string{"CHOWN"},
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},
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includes: util.SubstractStringSlice(getOCICapabilitiesList(), "CAP_CHOWN"),
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excludes: []string{"CAP_CHOWN"},
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},
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"should be able to add capabilities with drop all": {
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capability: &runtime.Capability{
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AddCapabilities: []string{"SYS_ADMIN"},
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DropCapabilities: []string{"ALL"},
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},
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includes: []string{"CAP_SYS_ADMIN"},
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excludes: util.SubstractStringSlice(getOCICapabilitiesList(), "CAP_SYS_ADMIN"),
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},
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} {
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t.Logf("TestCase %q", desc)
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config.Linux.SecurityContext.Capabilities = test.capability
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spec, err := c.generateContainerSpec(testID, testPid, config, sandboxConfig, imageConfig, nil)
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assert.NoError(t, err)
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specCheck(t, testID, testPid, spec)
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t.Log(spec.Process.Capabilities.Bounding)
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for _, include := range test.includes {
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assert.Contains(t, spec.Process.Capabilities.Bounding, include)
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assert.Contains(t, spec.Process.Capabilities.Effective, include)
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assert.Contains(t, spec.Process.Capabilities.Inheritable, include)
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assert.Contains(t, spec.Process.Capabilities.Permitted, include)
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}
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for _, exclude := range test.excludes {
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assert.NotContains(t, spec.Process.Capabilities.Bounding, exclude)
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assert.NotContains(t, spec.Process.Capabilities.Effective, exclude)
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assert.NotContains(t, spec.Process.Capabilities.Inheritable, exclude)
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assert.NotContains(t, spec.Process.Capabilities.Permitted, exclude)
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}
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}
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}
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func TestContainerSpecTty(t *testing.T) {
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testID := "test-id"
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testPid := uint32(1234)
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config, sandboxConfig, imageConfig, specCheck := getCreateContainerTestData()
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c := newTestCRIContainerdService()
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for _, tty := range []bool{true, false} {
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config.Tty = tty
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spec, err := c.generateContainerSpec(testID, testPid, config, sandboxConfig, imageConfig, nil)
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assert.NoError(t, err)
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specCheck(t, testID, testPid, spec)
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assert.Equal(t, tty, spec.Process.Terminal)
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if tty {
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assert.Contains(t, spec.Process.Env, "TERM=xterm")
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} else {
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assert.NotContains(t, spec.Process.Env, "TERM=xterm")
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}
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}
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}
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func TestContainerSpecReadonlyRootfs(t *testing.T) {
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testID := "test-id"
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testPid := uint32(1234)
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config, sandboxConfig, imageConfig, specCheck := getCreateContainerTestData()
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c := newTestCRIContainerdService()
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for _, readonly := range []bool{true, false} {
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config.Linux.SecurityContext.ReadonlyRootfs = readonly
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spec, err := c.generateContainerSpec(testID, testPid, config, sandboxConfig, imageConfig, nil)
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assert.NoError(t, err)
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specCheck(t, testID, testPid, spec)
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assert.Equal(t, readonly, spec.Root.Readonly)
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}
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}
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func TestContainerSpecWithExtraMounts(t *testing.T) {
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testID := "test-id"
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testPid := uint32(1234)
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config, sandboxConfig, imageConfig, specCheck := getCreateContainerTestData()
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c := newTestCRIContainerdService()
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mountInConfig := &runtime.Mount{
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ContainerPath: "test-container-path",
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HostPath: "test-host-path",
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Readonly: false,
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}
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config.Mounts = append(config.Mounts, mountInConfig)
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extraMount := &runtime.Mount{
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ContainerPath: "test-container-path",
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HostPath: "test-host-path-extra",
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Readonly: true,
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}
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spec, err := c.generateContainerSpec(testID, testPid, config, sandboxConfig, imageConfig, []*runtime.Mount{extraMount})
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assert.NoError(t, err)
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specCheck(t, testID, testPid, spec)
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var mounts []runtimespec.Mount
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for _, m := range spec.Mounts {
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if m.Destination == "test-container-path" {
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mounts = append(mounts, m)
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}
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}
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t.Logf("Extra mounts should come first")
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require.Len(t, mounts, 2)
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assert.Equal(t, "test-host-path-extra", mounts[0].Source)
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assert.Contains(t, mounts[0].Options, "ro")
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assert.Equal(t, "test-host-path", mounts[1].Source)
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assert.Contains(t, mounts[1].Options, "rw")
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}
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func TestContainerSpecCommand(t *testing.T) {
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for desc, test := range map[string]struct {
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criEntrypoint []string
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criArgs []string
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imageEntrypoint []string
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imageArgs []string
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expected []string
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expectErr bool
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}{
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"should use cri entrypoint if it's specified": {
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criEntrypoint: []string{"a", "b"},
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imageEntrypoint: []string{"c", "d"},
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imageArgs: []string{"e", "f"},
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expected: []string{"a", "b"},
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},
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"should use cri entrypoint if it's specified even if it's empty": {
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criEntrypoint: []string{},
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criArgs: []string{"a", "b"},
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imageEntrypoint: []string{"c", "d"},
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imageArgs: []string{"e", "f"},
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expected: []string{"a", "b"},
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},
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"should use cri entrypoint and args if they are specified": {
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criEntrypoint: []string{"a", "b"},
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criArgs: []string{"c", "d"},
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imageEntrypoint: []string{"e", "f"},
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imageArgs: []string{"g", "h"},
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expected: []string{"a", "b", "c", "d"},
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},
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"should use image entrypoint if cri entrypoint is not specified": {
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criArgs: []string{"a", "b"},
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imageEntrypoint: []string{"c", "d"},
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imageArgs: []string{"e", "f"},
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expected: []string{"c", "d", "a", "b"},
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},
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"should use image args if both cri entrypoint and args are not specified": {
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imageEntrypoint: []string{"c", "d"},
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imageArgs: []string{"e", "f"},
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expected: []string{"c", "d", "e", "f"},
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},
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"should return error if both entrypoint and args are empty": {
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expectErr: true,
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},
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} {
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config, _, imageConfig, _ := getCreateContainerTestData()
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g := generate.New()
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config.Command = test.criEntrypoint
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config.Args = test.criArgs
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imageConfig.Entrypoint = test.imageEntrypoint
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imageConfig.Cmd = test.imageArgs
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err := setOCIProcessArgs(&g, config, imageConfig)
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if test.expectErr {
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assert.Error(t, err)
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continue
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}
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assert.NoError(t, err)
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assert.Equal(t, test.expected, g.Spec().Process.Args, desc)
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}
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}
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func TestGenerateContainerMounts(t *testing.T) {
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testSandboxRootDir := "test-sandbox-root"
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for desc, test := range map[string]struct {
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securityContext *runtime.LinuxContainerSecurityContext
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expectedMounts []*runtime.Mount
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}{
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"should setup ro mount when rootfs is read-only": {
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securityContext: &runtime.LinuxContainerSecurityContext{
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ReadonlyRootfs: true,
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},
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expectedMounts: []*runtime.Mount{
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{
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ContainerPath: "/etc/hosts",
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HostPath: testSandboxRootDir + "/hosts",
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Readonly: true,
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},
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{
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ContainerPath: resolvConfPath,
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HostPath: testSandboxRootDir + "/resolv.conf",
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Readonly: true,
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},
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{
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ContainerPath: "/dev/shm",
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HostPath: testSandboxRootDir + "/shm",
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Readonly: false,
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},
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},
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},
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"should setup rw mount when rootfs is read-write": {
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securityContext: &runtime.LinuxContainerSecurityContext{},
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expectedMounts: []*runtime.Mount{
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{
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ContainerPath: "/etc/hosts",
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HostPath: testSandboxRootDir + "/hosts",
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Readonly: false,
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},
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{
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ContainerPath: resolvConfPath,
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HostPath: testSandboxRootDir + "/resolv.conf",
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Readonly: false,
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},
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{
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ContainerPath: "/dev/shm",
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HostPath: testSandboxRootDir + "/shm",
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Readonly: false,
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},
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},
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},
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"should use host /dev/shm when host ipc is set": {
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securityContext: &runtime.LinuxContainerSecurityContext{
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NamespaceOptions: &runtime.NamespaceOption{HostIpc: true},
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},
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expectedMounts: []*runtime.Mount{
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{
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ContainerPath: "/etc/hosts",
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HostPath: testSandboxRootDir + "/hosts",
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Readonly: false,
|
|
},
|
|
{
|
|
ContainerPath: resolvConfPath,
|
|
HostPath: testSandboxRootDir + "/resolv.conf",
|
|
Readonly: false,
|
|
},
|
|
{
|
|
ContainerPath: "/dev/shm",
|
|
HostPath: "/dev/shm",
|
|
Readonly: false,
|
|
},
|
|
},
|
|
},
|
|
} {
|
|
config := &runtime.ContainerConfig{
|
|
Metadata: &runtime.ContainerMetadata{
|
|
Name: "test-name",
|
|
Attempt: 1,
|
|
},
|
|
Linux: &runtime.LinuxContainerConfig{
|
|
SecurityContext: test.securityContext,
|
|
},
|
|
}
|
|
c := newTestCRIContainerdService()
|
|
mounts := c.generateContainerMounts(testSandboxRootDir, config)
|
|
assert.Equal(t, test.expectedMounts, mounts, desc)
|
|
}
|
|
}
|
|
|
|
func TestPrivilegedBindMount(t *testing.T) {
|
|
for desc, test := range map[string]struct {
|
|
privileged bool
|
|
readonlyRootFS bool
|
|
expectedSysFSRO bool
|
|
expectedCgroupFSRO bool
|
|
}{
|
|
"sysfs and cgroupfs should mount as 'ro' by default": {
|
|
expectedSysFSRO: true,
|
|
expectedCgroupFSRO: true,
|
|
},
|
|
"sysfs and cgroupfs should not mount as 'ro' if privileged": {
|
|
privileged: true,
|
|
expectedSysFSRO: false,
|
|
expectedCgroupFSRO: false,
|
|
},
|
|
"sysfs should mount as 'ro' if root filrsystem is readonly": {
|
|
privileged: true,
|
|
readonlyRootFS: true,
|
|
expectedSysFSRO: true,
|
|
expectedCgroupFSRO: false,
|
|
},
|
|
} {
|
|
t.Logf("TestCase %q", desc)
|
|
g := generate.New()
|
|
g.SetRootReadonly(test.readonlyRootFS)
|
|
addOCIBindMounts(&g, nil, "")
|
|
if test.privileged {
|
|
setOCIBindMountsPrivileged(&g)
|
|
}
|
|
spec := g.Spec()
|
|
if test.expectedSysFSRO {
|
|
checkMount(t, spec.Mounts, "sysfs", "/sys", "sysfs", []string{"ro"}, nil)
|
|
} else {
|
|
checkMount(t, spec.Mounts, "sysfs", "/sys", "sysfs", nil, []string{"ro"})
|
|
}
|
|
if test.expectedCgroupFSRO {
|
|
checkMount(t, spec.Mounts, "cgroup", "/sys/fs/cgroup", "cgroup", []string{"ro"}, nil)
|
|
} else {
|
|
checkMount(t, spec.Mounts, "cgroup", "/sys/fs/cgroup", "cgroup", nil, []string{"ro"})
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestPidNamespace(t *testing.T) {
|
|
testID := "test-id"
|
|
testPid := uint32(1234)
|
|
config, sandboxConfig, imageConfig, specCheck := getCreateContainerTestData()
|
|
c := newTestCRIContainerdService()
|
|
t.Logf("should not set pid namespace when host pid is true")
|
|
config.Linux.SecurityContext.NamespaceOptions = &runtime.NamespaceOption{HostPid: true}
|
|
spec, err := c.generateContainerSpec(testID, testPid, config, sandboxConfig, imageConfig, nil)
|
|
assert.NoError(t, err)
|
|
specCheck(t, testID, testPid, spec)
|
|
for _, ns := range spec.Linux.Namespaces {
|
|
assert.NotEqual(t, ns.Type, runtimespec.PIDNamespace)
|
|
}
|
|
|
|
t.Logf("should set pid namespace when host pid is false")
|
|
config.Linux.SecurityContext.NamespaceOptions = &runtime.NamespaceOption{HostPid: false}
|
|
spec, err = c.generateContainerSpec(testID, testPid, config, sandboxConfig, imageConfig, nil)
|
|
assert.NoError(t, err)
|
|
specCheck(t, testID, testPid, spec)
|
|
assert.Contains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
|
|
Type: runtimespec.PIDNamespace,
|
|
})
|
|
}
|