a7adeb6976
This patch requests the OCI runtime to create a userns when the CRI message includes such request. Signed-off-by: Rodrigo Campos <rodrigoca@microsoft.com>
647 lines
20 KiB
Go
647 lines
20 KiB
Go
/*
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Copyright The containerd 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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"os"
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"path/filepath"
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"strconv"
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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/selinux/go-selinux"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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runtime "k8s.io/cri-api/pkg/apis/runtime/v1"
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v1 "k8s.io/cri-api/pkg/apis/runtime/v1"
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"github.com/containerd/containerd/pkg/cri/annotations"
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"github.com/containerd/containerd/pkg/cri/opts"
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ostesting "github.com/containerd/containerd/pkg/os/testing"
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)
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func getRunPodSandboxTestData() (*runtime.PodSandboxConfig, *imagespec.ImageConfig, func(*testing.T, string, *runtimespec.Spec)) {
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config := &runtime.PodSandboxConfig{
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Metadata: &runtime.PodSandboxMetadata{
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Name: "test-name",
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Uid: "test-uid",
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Namespace: "test-ns",
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Attempt: 1,
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},
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Hostname: "test-hostname",
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LogDirectory: "test-log-directory",
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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.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{"a=b", "c=d"},
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Entrypoint: []string{"/pause"},
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Cmd: []string{"forever"},
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WorkingDir: "/workspace",
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}
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specCheck := func(t *testing.T, id string, spec *runtimespec.Spec) {
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assert.Equal(t, "test-hostname", spec.Hostname)
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assert.Equal(t, getCgroupsPath("/test/cgroup/parent", id), spec.Linux.CgroupsPath)
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assert.Equal(t, relativeRootfsPath, spec.Root.Path)
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assert.Equal(t, true, spec.Root.Readonly)
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assert.Contains(t, spec.Process.Env, "a=b", "c=d")
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assert.Equal(t, []string{"/pause", "forever"}, spec.Process.Args)
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assert.Equal(t, "/workspace", spec.Process.Cwd)
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assert.EqualValues(t, *spec.Linux.Resources.CPU.Shares, opts.DefaultSandboxCPUshares)
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assert.EqualValues(t, *spec.Process.OOMScoreAdj, defaultSandboxOOMAdj)
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t.Logf("Check PodSandbox annotations")
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assert.Contains(t, spec.Annotations, annotations.SandboxID)
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assert.EqualValues(t, spec.Annotations[annotations.SandboxID], id)
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assert.Contains(t, spec.Annotations, annotations.ContainerType)
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assert.EqualValues(t, spec.Annotations[annotations.ContainerType], annotations.ContainerTypeSandbox)
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assert.Contains(t, spec.Annotations, annotations.SandboxNamespace)
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assert.EqualValues(t, spec.Annotations[annotations.SandboxNamespace], "test-ns")
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assert.Contains(t, spec.Annotations, annotations.SandboxUID)
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assert.EqualValues(t, spec.Annotations[annotations.SandboxUID], "test-uid")
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assert.Contains(t, spec.Annotations, annotations.SandboxName)
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assert.EqualValues(t, spec.Annotations[annotations.SandboxName], "test-name")
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assert.Contains(t, spec.Annotations, annotations.SandboxLogDir)
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assert.EqualValues(t, spec.Annotations[annotations.SandboxLogDir], "test-log-directory")
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if selinux.GetEnabled() {
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assert.NotEqual(t, "", spec.Process.SelinuxLabel)
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assert.NotEqual(t, "", spec.Linux.MountLabel)
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}
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}
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return config, imageConfig, specCheck
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}
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func TestLinuxSandboxContainerSpec(t *testing.T) {
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testID := "test-id"
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nsPath := "test-cni"
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idMap := runtime.IDMapping{
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HostId: 1000,
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ContainerId: 1000,
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Length: 10,
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}
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expIDMap := runtimespec.LinuxIDMapping{
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HostID: 1000,
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ContainerID: 1000,
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Size: 10,
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}
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for desc, test := range map[string]struct {
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configChange func(*runtime.PodSandboxConfig)
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specCheck func(*testing.T, *runtimespec.Spec)
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expectErr bool
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}{
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"spec should reflect original config": {
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specCheck: func(t *testing.T, spec *runtimespec.Spec) {
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// runtime spec should have expected namespaces enabled by default.
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require.NotNil(t, spec.Linux)
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assert.Contains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.NetworkNamespace,
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Path: nsPath,
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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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})
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assert.Contains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.PIDNamespace,
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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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})
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assert.Contains(t, spec.Linux.Sysctl["net.ipv4.ip_unprivileged_port_start"], "0")
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assert.Contains(t, spec.Linux.Sysctl["net.ipv4.ping_group_range"], "0 2147483647")
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assert.NotContains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.UserNamespace,
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})
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},
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},
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"host namespace": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.SecurityContext = &runtime.LinuxSandboxSecurityContext{
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NamespaceOptions: &runtime.NamespaceOption{
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Network: runtime.NamespaceMode_NODE,
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Pid: runtime.NamespaceMode_NODE,
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Ipc: runtime.NamespaceMode_NODE,
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},
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}
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},
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specCheck: func(t *testing.T, spec *runtimespec.Spec) {
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// runtime spec should disable expected namespaces in host mode.
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require.NotNil(t, spec.Linux)
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assert.NotContains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.NetworkNamespace,
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})
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assert.NotContains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.UTSNamespace,
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})
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assert.NotContains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.PIDNamespace,
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})
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assert.NotContains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.IPCNamespace,
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})
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assert.NotContains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.UserNamespace,
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})
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assert.NotContains(t, spec.Linux.Sysctl["net.ipv4.ip_unprivileged_port_start"], "0")
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assert.NotContains(t, spec.Linux.Sysctl["net.ipv4.ping_group_range"], "0 2147483647")
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},
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},
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"user namespace": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.SecurityContext = &runtime.LinuxSandboxSecurityContext{
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NamespaceOptions: &runtime.NamespaceOption{
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UsernsOptions: &runtime.UserNamespace{
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Mode: runtime.NamespaceMode_POD,
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Uids: []*runtime.IDMapping{&idMap},
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Gids: []*runtime.IDMapping{&idMap},
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},
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},
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}
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},
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specCheck: func(t *testing.T, spec *runtimespec.Spec) {
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require.NotNil(t, spec.Linux)
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assert.Contains(t, spec.Linux.Namespaces, runtimespec.LinuxNamespace{
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Type: runtimespec.UserNamespace,
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})
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require.Equal(t, spec.Linux.UIDMappings, []runtimespec.LinuxIDMapping{expIDMap})
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require.Equal(t, spec.Linux.GIDMappings, []runtimespec.LinuxIDMapping{expIDMap})
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},
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},
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"user namespace mode node and mappings": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.SecurityContext = &runtime.LinuxSandboxSecurityContext{
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NamespaceOptions: &runtime.NamespaceOption{
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UsernsOptions: &runtime.UserNamespace{
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Mode: runtime.NamespaceMode_NODE,
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Uids: []*runtime.IDMapping{&idMap},
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Gids: []*runtime.IDMapping{&idMap},
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},
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},
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}
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},
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expectErr: true,
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},
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"user namespace with several mappings": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.SecurityContext = &runtime.LinuxSandboxSecurityContext{
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NamespaceOptions: &runtime.NamespaceOption{
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UsernsOptions: &runtime.UserNamespace{
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Mode: runtime.NamespaceMode_NODE,
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Uids: []*runtime.IDMapping{&idMap, &idMap},
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Gids: []*runtime.IDMapping{&idMap, &idMap},
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},
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},
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}
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},
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expectErr: true,
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},
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"user namespace with uneven mappings": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.SecurityContext = &runtime.LinuxSandboxSecurityContext{
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NamespaceOptions: &runtime.NamespaceOption{
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UsernsOptions: &runtime.UserNamespace{
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Mode: runtime.NamespaceMode_NODE,
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Uids: []*runtime.IDMapping{&idMap, &idMap},
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Gids: []*runtime.IDMapping{&idMap},
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},
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},
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}
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},
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expectErr: true,
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},
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"user namespace mode container": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.SecurityContext = &runtime.LinuxSandboxSecurityContext{
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NamespaceOptions: &runtime.NamespaceOption{
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UsernsOptions: &runtime.UserNamespace{
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Mode: runtime.NamespaceMode_CONTAINER,
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},
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},
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}
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},
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expectErr: true,
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},
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"user namespace mode target": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.SecurityContext = &runtime.LinuxSandboxSecurityContext{
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NamespaceOptions: &runtime.NamespaceOption{
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UsernsOptions: &runtime.UserNamespace{
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Mode: runtime.NamespaceMode_TARGET,
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},
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},
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}
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},
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expectErr: true,
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},
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"user namespace unknown mode": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.SecurityContext = &runtime.LinuxSandboxSecurityContext{
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NamespaceOptions: &runtime.NamespaceOption{
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UsernsOptions: &runtime.UserNamespace{
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Mode: runtime.NamespaceMode(100),
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},
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},
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}
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},
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expectErr: true,
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},
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"should set supplemental groups correctly": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.SecurityContext = &runtime.LinuxSandboxSecurityContext{
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SupplementalGroups: []int64{1111, 2222},
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}
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},
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specCheck: func(t *testing.T, spec *runtimespec.Spec) {
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require.NotNil(t, spec.Process)
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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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},
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},
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"should overwrite default sysctls": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.Sysctls = map[string]string{
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"net.ipv4.ip_unprivileged_port_start": "500",
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"net.ipv4.ping_group_range": "1 1000",
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}
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},
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specCheck: func(t *testing.T, spec *runtimespec.Spec) {
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require.NotNil(t, spec.Process)
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assert.Contains(t, spec.Linux.Sysctl["net.ipv4.ip_unprivileged_port_start"], "500")
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assert.Contains(t, spec.Linux.Sysctl["net.ipv4.ping_group_range"], "1 1000")
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},
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},
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"sandbox sizing annotations should be set if LinuxContainerResources were provided": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.Resources = &v1.LinuxContainerResources{
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CpuPeriod: 100,
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CpuQuota: 200,
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CpuShares: 5000,
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MemoryLimitInBytes: 1024,
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}
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},
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specCheck: func(t *testing.T, spec *runtimespec.Spec) {
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value, ok := spec.Annotations[annotations.SandboxCPUPeriod]
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assert.True(t, ok)
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assert.EqualValues(t, strconv.FormatInt(100, 10), value)
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assert.EqualValues(t, "100", value)
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value, ok = spec.Annotations[annotations.SandboxCPUQuota]
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assert.True(t, ok)
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assert.EqualValues(t, "200", value)
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value, ok = spec.Annotations[annotations.SandboxCPUShares]
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assert.True(t, ok)
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assert.EqualValues(t, "5000", value)
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value, ok = spec.Annotations[annotations.SandboxMem]
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assert.True(t, ok)
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assert.EqualValues(t, "1024", value)
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},
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},
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"sandbox sizing annotations should not be set if LinuxContainerResources were not provided": {
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specCheck: func(t *testing.T, spec *runtimespec.Spec) {
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_, ok := spec.Annotations[annotations.SandboxCPUPeriod]
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assert.False(t, ok)
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_, ok = spec.Annotations[annotations.SandboxCPUQuota]
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assert.False(t, ok)
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_, ok = spec.Annotations[annotations.SandboxCPUShares]
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assert.False(t, ok)
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_, ok = spec.Annotations[annotations.SandboxMem]
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assert.False(t, ok)
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},
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},
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"sandbox sizing annotations are zero if the resources are set to 0": {
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configChange: func(c *runtime.PodSandboxConfig) {
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c.Linux.Resources = &v1.LinuxContainerResources{}
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},
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specCheck: func(t *testing.T, spec *runtimespec.Spec) {
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value, ok := spec.Annotations[annotations.SandboxCPUPeriod]
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assert.True(t, ok)
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assert.EqualValues(t, "0", value)
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value, ok = spec.Annotations[annotations.SandboxCPUQuota]
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assert.True(t, ok)
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assert.EqualValues(t, "0", value)
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value, ok = spec.Annotations[annotations.SandboxCPUShares]
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assert.True(t, ok)
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assert.EqualValues(t, "0", value)
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value, ok = spec.Annotations[annotations.SandboxMem]
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assert.True(t, ok)
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assert.EqualValues(t, "0", value)
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},
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},
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} {
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t.Run(desc, func(t *testing.T) {
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c := newTestCRIService()
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c.config.EnableUnprivilegedICMP = true
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c.config.EnableUnprivilegedPorts = true
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config, imageConfig, specCheck := getRunPodSandboxTestData()
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if test.configChange != nil {
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test.configChange(config)
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}
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spec, err := c.sandboxContainerSpec(testID, config, imageConfig, nsPath, nil)
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if test.expectErr {
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assert.Error(t, err)
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assert.Nil(t, spec)
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return
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}
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assert.NoError(t, err)
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assert.NotNil(t, spec)
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specCheck(t, testID, spec)
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if test.specCheck != nil {
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test.specCheck(t, spec)
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}
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})
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}
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}
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func TestSetupSandboxFiles(t *testing.T) {
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const (
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testID = "test-id"
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realhostname = "test-real-hostname"
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)
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for desc, test := range map[string]struct {
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dnsConfig *runtime.DNSConfig
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hostname string
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ipcMode runtime.NamespaceMode
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expectedCalls []ostesting.CalledDetail
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}{
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"should check host /dev/shm existence when ipc mode is NODE": {
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ipcMode: runtime.NamespaceMode_NODE,
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expectedCalls: []ostesting.CalledDetail{
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{
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Name: "Hostname",
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},
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{
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Name: "WriteFile",
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Arguments: []interface{}{
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filepath.Join(testRootDir, sandboxesDir, testID, "hostname"),
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[]byte(realhostname + "\n"),
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os.FileMode(0644),
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},
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},
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{
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Name: "CopyFile",
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Arguments: []interface{}{
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"/etc/hosts",
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filepath.Join(testRootDir, sandboxesDir, testID, "hosts"),
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os.FileMode(0644),
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},
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},
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{
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Name: "CopyFile",
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Arguments: []interface{}{
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"/etc/resolv.conf",
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filepath.Join(testRootDir, sandboxesDir, testID, "resolv.conf"),
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os.FileMode(0644),
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},
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},
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{
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Name: "Stat",
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Arguments: []interface{}{"/dev/shm"},
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},
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},
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},
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"should create new /etc/resolv.conf if DNSOptions is set": {
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dnsConfig: &runtime.DNSConfig{
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Servers: []string{"8.8.8.8"},
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Searches: []string{"114.114.114.114"},
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Options: []string{"timeout:1"},
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},
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ipcMode: runtime.NamespaceMode_NODE,
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expectedCalls: []ostesting.CalledDetail{
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{
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Name: "Hostname",
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},
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{
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Name: "WriteFile",
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Arguments: []interface{}{
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filepath.Join(testRootDir, sandboxesDir, testID, "hostname"),
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[]byte(realhostname + "\n"),
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os.FileMode(0644),
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},
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},
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{
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Name: "CopyFile",
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Arguments: []interface{}{
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"/etc/hosts",
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filepath.Join(testRootDir, sandboxesDir, testID, "hosts"),
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os.FileMode(0644),
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},
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},
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{
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Name: "WriteFile",
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Arguments: []interface{}{
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filepath.Join(testRootDir, sandboxesDir, testID, "resolv.conf"),
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[]byte(`search 114.114.114.114
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nameserver 8.8.8.8
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options timeout:1
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`), os.FileMode(0644),
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},
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},
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{
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Name: "Stat",
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Arguments: []interface{}{"/dev/shm"},
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},
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},
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},
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"should create sandbox shm when ipc namespace mode is not NODE": {
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ipcMode: runtime.NamespaceMode_POD,
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expectedCalls: []ostesting.CalledDetail{
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{
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Name: "Hostname",
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},
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{
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|
Name: "WriteFile",
|
|
Arguments: []interface{}{
|
|
filepath.Join(testRootDir, sandboxesDir, testID, "hostname"),
|
|
[]byte(realhostname + "\n"),
|
|
os.FileMode(0644),
|
|
},
|
|
},
|
|
{
|
|
Name: "CopyFile",
|
|
Arguments: []interface{}{
|
|
"/etc/hosts",
|
|
filepath.Join(testRootDir, sandboxesDir, testID, "hosts"),
|
|
os.FileMode(0644),
|
|
},
|
|
},
|
|
{
|
|
Name: "CopyFile",
|
|
Arguments: []interface{}{
|
|
"/etc/resolv.conf",
|
|
filepath.Join(testRootDir, sandboxesDir, testID, "resolv.conf"),
|
|
os.FileMode(0644),
|
|
},
|
|
},
|
|
{
|
|
Name: "MkdirAll",
|
|
Arguments: []interface{}{
|
|
filepath.Join(testStateDir, sandboxesDir, testID, "shm"),
|
|
os.FileMode(0700),
|
|
},
|
|
},
|
|
{
|
|
Name: "Mount",
|
|
// Ignore arguments which are too complex to check.
|
|
},
|
|
},
|
|
},
|
|
"should create /etc/hostname when hostname is set": {
|
|
hostname: "test-hostname",
|
|
ipcMode: runtime.NamespaceMode_NODE,
|
|
expectedCalls: []ostesting.CalledDetail{
|
|
{
|
|
Name: "WriteFile",
|
|
Arguments: []interface{}{
|
|
filepath.Join(testRootDir, sandboxesDir, testID, "hostname"),
|
|
[]byte("test-hostname\n"),
|
|
os.FileMode(0644),
|
|
},
|
|
},
|
|
{
|
|
Name: "CopyFile",
|
|
Arguments: []interface{}{
|
|
"/etc/hosts",
|
|
filepath.Join(testRootDir, sandboxesDir, testID, "hosts"),
|
|
os.FileMode(0644),
|
|
},
|
|
},
|
|
{
|
|
Name: "CopyFile",
|
|
Arguments: []interface{}{
|
|
"/etc/resolv.conf",
|
|
filepath.Join(testRootDir, sandboxesDir, testID, "resolv.conf"),
|
|
os.FileMode(0644),
|
|
},
|
|
},
|
|
{
|
|
Name: "Stat",
|
|
Arguments: []interface{}{"/dev/shm"},
|
|
},
|
|
},
|
|
},
|
|
} {
|
|
t.Run(desc, func(t *testing.T) {
|
|
c := newTestCRIService()
|
|
c.os.(*ostesting.FakeOS).HostnameFn = func() (string, error) {
|
|
return realhostname, nil
|
|
}
|
|
cfg := &runtime.PodSandboxConfig{
|
|
Hostname: test.hostname,
|
|
DnsConfig: test.dnsConfig,
|
|
Linux: &runtime.LinuxPodSandboxConfig{
|
|
SecurityContext: &runtime.LinuxSandboxSecurityContext{
|
|
NamespaceOptions: &runtime.NamespaceOption{
|
|
Ipc: test.ipcMode,
|
|
},
|
|
},
|
|
},
|
|
}
|
|
c.setupSandboxFiles(testID, cfg)
|
|
calls := c.os.(*ostesting.FakeOS).GetCalls()
|
|
assert.Len(t, calls, len(test.expectedCalls))
|
|
for i, expected := range test.expectedCalls {
|
|
if expected.Arguments == nil {
|
|
// Ignore arguments.
|
|
expected.Arguments = calls[i].Arguments
|
|
}
|
|
assert.Equal(t, expected, calls[i])
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestParseDNSOption(t *testing.T) {
|
|
for desc, test := range map[string]struct {
|
|
servers []string
|
|
searches []string
|
|
options []string
|
|
expectedContent string
|
|
expectErr bool
|
|
}{
|
|
"empty dns options should return empty content": {},
|
|
"non-empty dns options should return correct content": {
|
|
servers: []string{"8.8.8.8", "server.google.com"},
|
|
searches: []string{"114.114.114.114"},
|
|
options: []string{"timeout:1"},
|
|
expectedContent: `search 114.114.114.114
|
|
nameserver 8.8.8.8
|
|
nameserver server.google.com
|
|
options timeout:1
|
|
`,
|
|
},
|
|
"expanded dns config should return correct content on modern libc (e.g. glibc 2.26 and above)": {
|
|
servers: []string{"8.8.8.8", "server.google.com"},
|
|
searches: []string{
|
|
"server0.google.com",
|
|
"server1.google.com",
|
|
"server2.google.com",
|
|
"server3.google.com",
|
|
"server4.google.com",
|
|
"server5.google.com",
|
|
"server6.google.com",
|
|
},
|
|
options: []string{"timeout:1"},
|
|
expectedContent: `search server0.google.com server1.google.com server2.google.com server3.google.com server4.google.com server5.google.com server6.google.com
|
|
nameserver 8.8.8.8
|
|
nameserver server.google.com
|
|
options timeout:1
|
|
`,
|
|
},
|
|
} {
|
|
t.Run(desc, func(t *testing.T) {
|
|
resolvContent, err := parseDNSOptions(test.servers, test.searches, test.options)
|
|
if test.expectErr {
|
|
assert.Error(t, err)
|
|
return
|
|
}
|
|
assert.NoError(t, err)
|
|
assert.Equal(t, resolvContent, test.expectedContent)
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestSandboxDisableCgroup(t *testing.T) {
|
|
config, imageConfig, _ := getRunPodSandboxTestData()
|
|
c := newTestCRIService()
|
|
c.config.DisableCgroup = true
|
|
spec, err := c.sandboxContainerSpec("test-id", config, imageConfig, "test-cni", []string{})
|
|
require.NoError(t, err)
|
|
|
|
t.Log("resource limit should not be set")
|
|
assert.Nil(t, spec.Linux.Resources.Memory)
|
|
assert.Nil(t, spec.Linux.Resources.CPU)
|
|
|
|
t.Log("cgroup path should be empty")
|
|
assert.Empty(t, spec.Linux.CgroupsPath)
|
|
}
|
|
|
|
// TODO(random-liu): [P1] Add unit test for different error cases to make sure
|
|
// the function cleans up on error properly.
|