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container_linux_test.go
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1868 lines (1574 loc) · 39.1 KB
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// +build linux
/*
Copyright The containerd Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package containerd
import (
"bytes"
"context"
"fmt"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"sync"
"syscall"
"testing"
"time"
"github.com/containerd/cgroups"
"github.com/containerd/containerd/cio"
"github.com/containerd/containerd/containers"
"github.com/containerd/containerd/errdefs"
"github.com/containerd/containerd/oci"
"github.com/containerd/containerd/plugin"
"github.com/containerd/containerd/runtime/linux/runctypes"
"github.com/containerd/containerd/runtime/v2/runc/options"
"github.com/containerd/containerd/sys"
specs "github.com/opencontainers/runtime-spec/specs-go"
"github.com/pkg/errors"
"golang.org/x/sys/unix"
)
func TestTaskUpdate(t *testing.T) {
t.Parallel()
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
ctx, cancel = testContext(t)
id = t.Name()
)
defer cancel()
image, err := client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
limit := int64(32 * 1024 * 1024)
memory := func(_ context.Context, _ oci.Client, _ *containers.Container, s *specs.Spec) error {
s.Linux.Resources.Memory = &specs.LinuxMemory{
Limit: &limit,
}
return nil
}
container, err := client.NewContainer(ctx, id, WithNewSnapshot(id, image),
WithNewSpec(oci.WithImageConfig(image), withProcessArgs("sleep", "30"), memory))
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
task, err := container.NewTask(ctx, empty())
if err != nil {
t.Fatal(err)
}
defer task.Delete(ctx)
statusC, err := task.Wait(ctx)
if err != nil {
t.Fatal(err)
}
// check that the task has a limit of 32mb
cgroup, err := cgroups.Load(cgroups.V1, cgroups.PidPath(int(task.Pid())))
if err != nil {
t.Fatal(err)
}
stat, err := cgroup.Stat(cgroups.IgnoreNotExist)
if err != nil {
t.Fatal(err)
}
if int64(stat.Memory.Usage.Limit) != limit {
t.Fatalf("expected memory limit to be set to %d but received %d", limit, stat.Memory.Usage.Limit)
}
limit = 64 * 1024 * 1024
if err := task.Update(ctx, WithResources(&specs.LinuxResources{
Memory: &specs.LinuxMemory{
Limit: &limit,
},
})); err != nil {
t.Error(err)
}
// check that the task has a limit of 64mb
if stat, err = cgroup.Stat(cgroups.IgnoreNotExist); err != nil {
t.Fatal(err)
}
if int64(stat.Memory.Usage.Limit) != limit {
t.Errorf("expected memory limit to be set to %d but received %d", limit, stat.Memory.Usage.Limit)
}
if err := task.Kill(ctx, unix.SIGKILL); err != nil {
t.Fatal(err)
}
<-statusC
}
func TestShimInCgroup(t *testing.T) {
t.Parallel()
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
ctx, cancel = testContext(t)
id = t.Name()
)
defer cancel()
image, err := client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSnapshot(id, image), WithNewSpec(oci.WithImageConfig(image), oci.WithProcessArgs("sleep", "30")))
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
// create a cgroup for the shim to use
path := "/containerd/shim"
cg, err := cgroups.New(cgroups.V1, cgroups.StaticPath(path), &specs.LinuxResources{})
if err != nil {
t.Fatal(err)
}
defer cg.Delete()
task, err := container.NewTask(ctx, empty(), WithShimCgroup(path))
if err != nil {
t.Fatal(err)
}
defer task.Delete(ctx)
statusC, err := task.Wait(ctx)
if err != nil {
t.Fatal(err)
}
// check to see if the shim is inside the cgroup
processes, err := cg.Processes(cgroups.Devices, false)
if err != nil {
t.Fatal(err)
}
if len(processes) == 0 {
t.Errorf("created cgroup should have at least one process inside: %d", len(processes))
}
if err := task.Kill(ctx, unix.SIGKILL); err != nil {
t.Fatal(err)
}
<-statusC
}
func TestDaemonRestart(t *testing.T) {
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext(t)
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSnapshot(id, image), WithNewSpec(oci.WithImageConfig(image), withProcessArgs("sleep", "30")))
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
task, err := container.NewTask(ctx, empty())
if err != nil {
t.Fatal(err)
}
defer task.Delete(ctx)
statusC, err := task.Wait(ctx)
if err != nil {
t.Fatal(err)
}
if err := task.Start(ctx); err != nil {
t.Fatal(err)
}
var exitStatus ExitStatus
if err := ctrd.Restart(func() {
exitStatus = <-statusC
}); err != nil {
t.Fatal(err)
}
if exitStatus.Error() == nil {
t.Errorf(`first task.Wait() should have failed with "transport is closing"`)
}
waitCtx, waitCancel := context.WithTimeout(ctx, 2*time.Second)
serving, err := client.IsServing(waitCtx)
waitCancel()
if !serving {
t.Fatalf("containerd did not start within 2s: %v", err)
}
statusC, err = task.Wait(ctx)
if err != nil {
t.Fatal(err)
}
if err := task.Kill(ctx, syscall.SIGKILL); err != nil {
t.Fatal(err)
}
<-statusC
}
func TestShimDoesNotLeakPipes(t *testing.T) {
containerdPid := ctrd.cmd.Process.Pid
initialPipes, err := numPipes(containerdPid)
if err != nil {
t.Fatal(err)
}
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext(t)
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSnapshot(id, image), WithNewSpec(oci.WithImageConfig(image), withProcessArgs("sleep", "30")))
if err != nil {
t.Fatal(err)
}
task, err := container.NewTask(ctx, empty())
if err != nil {
t.Fatal(err)
}
exitChannel, err := task.Wait(ctx)
if err != nil {
t.Fatal(err)
}
if err := task.Start(ctx); err != nil {
t.Fatal(err)
}
if err := task.Kill(ctx, syscall.SIGKILL); err != nil {
t.Fatal(err)
}
<-exitChannel
if _, err := task.Delete(ctx); err != nil {
t.Fatal(err)
}
if err := container.Delete(ctx, WithSnapshotCleanup); err != nil {
t.Fatal(err)
}
currentPipes, err := numPipes(containerdPid)
if err != nil {
t.Fatal(err)
}
if initialPipes != currentPipes {
t.Errorf("Pipes have leaked after container has been deleted. Initially there were %d pipes, after container deletion there were %d pipes", initialPipes, currentPipes)
}
}
func numPipes(pid int) (int, error) {
cmd := exec.Command("sh", "-c", fmt.Sprintf("lsof -p %d | grep FIFO", pid))
var stdout bytes.Buffer
cmd.Stdout = &stdout
if err := cmd.Run(); err != nil {
return 0, err
}
return strings.Count(stdout.String(), "\n"), nil
}
func TestDaemonReconnectsToShimIOPipesOnRestart(t *testing.T) {
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext(t)
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSnapshot(id, image), WithNewSpec(oci.WithImageConfig(image), withProcessArgs("sleep", "30")))
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
task, err := container.NewTask(ctx, empty())
if err != nil {
t.Fatal(err)
}
defer task.Delete(ctx)
_, err = task.Wait(ctx)
if err != nil {
t.Fatal(err)
}
if err := task.Start(ctx); err != nil {
t.Fatal(err)
}
if err := ctrd.Restart(nil); err != nil {
t.Fatal(err)
}
waitCtx, waitCancel := context.WithTimeout(ctx, 2*time.Second)
serving, err := client.IsServing(waitCtx)
waitCancel()
if !serving {
t.Fatalf("containerd did not start within 2s: %v", err)
}
// After we restared containerd we write some messages to the log pipes, simulating shim writing stuff there.
// Then we make sure that these messages are available on the containerd log thus proving that the server reconnected to the log pipes
runtimeVersion := getRuntimeVersion()
logDirPath := getLogDirPath(runtimeVersion, id)
switch runtimeVersion {
case "v1":
writeToFile(t, filepath.Join(logDirPath, "shim.stdout.log"), fmt.Sprintf("%s writing to stdout\n", id))
writeToFile(t, filepath.Join(logDirPath, "shim.stderr.log"), fmt.Sprintf("%s writing to stderr\n", id))
case "v2":
writeToFile(t, filepath.Join(logDirPath, "log"), fmt.Sprintf("%s writing to log\n", id))
}
statusC, err := task.Wait(ctx)
if err != nil {
t.Fatal(err)
}
if err := task.Kill(ctx, syscall.SIGKILL); err != nil {
t.Fatal(err)
}
<-statusC
stdioContents, err := ioutil.ReadFile(ctrdStdioFilePath)
if err != nil {
t.Fatal(err)
}
switch runtimeVersion {
case "v1":
if !strings.Contains(string(stdioContents), fmt.Sprintf("%s writing to stdout", id)) {
t.Fatal("containerd did not connect to the shim stdout pipe")
}
if !strings.Contains(string(stdioContents), fmt.Sprintf("%s writing to stderr", id)) {
t.Fatal("containerd did not connect to the shim stderr pipe")
}
case "v2":
if !strings.Contains(string(stdioContents), fmt.Sprintf("%s writing to log", id)) {
t.Fatal("containerd did not connect to the shim log pipe")
}
}
}
func writeToFile(t *testing.T, filePath, message string) {
writer, err := os.OpenFile(filePath, os.O_WRONLY, 0600)
if err != nil {
t.Fatal(err)
}
if _, err := writer.WriteString(message); err != nil {
t.Fatal(err)
}
if err := writer.Close(); err != nil {
t.Fatal(err)
}
}
func getLogDirPath(runtimeVersion, id string) string {
switch runtimeVersion {
case "v1":
return filepath.Join(defaultRoot, plugin.RuntimeLinuxV1, testNamespace, id)
case "v2":
return filepath.Join(defaultState, "io.containerd.runtime.v2.task", testNamespace, id)
default:
panic(fmt.Errorf("Unsupported runtime version %s", runtimeVersion))
}
}
func TestContainerPTY(t *testing.T) {
t.Parallel()
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext(t)
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSnapshot(id, image), WithNewSpec(oci.WithImageConfig(image), oci.WithTTY, withProcessArgs("echo", "hello")))
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
direct, err := newDirectIO(ctx, true)
if err != nil {
t.Fatal(err)
}
defer direct.Delete()
var (
wg sync.WaitGroup
buf = bytes.NewBuffer(nil)
)
wg.Add(1)
go func() {
defer wg.Done()
io.Copy(buf, direct.Stdout)
}()
task, err := container.NewTask(ctx, direct.IOCreate)
if err != nil {
t.Fatal(err)
}
defer task.Delete(ctx)
status, err := task.Wait(ctx)
if err != nil {
t.Error(err)
}
if err := task.Start(ctx); err != nil {
t.Fatal(err)
}
<-status
wg.Wait()
if err := direct.Close(); err != nil {
t.Error(err)
}
out := buf.String()
if !strings.ContainsAny(fmt.Sprintf("%#q", out), `\x00`) {
t.Fatal(`expected \x00 in output`)
}
}
func TestContainerAttach(t *testing.T) {
t.Parallel()
if runtime.GOOS == "windows" {
// On windows, closing the write side of the pipe closes the read
// side, sending an EOF to it and preventing reopening it.
// Hence this test will always fails on windows
t.Skip("invalid logic on windows")
}
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext(t)
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSnapshot(id, image), WithNewSpec(oci.WithImageConfig(image), withCat()))
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
expected := "hello" + newLine
direct, err := newDirectIO(ctx, false)
if err != nil {
t.Fatal(err)
}
defer direct.Delete()
var (
wg sync.WaitGroup
buf = bytes.NewBuffer(nil)
)
wg.Add(1)
go func() {
defer wg.Done()
io.Copy(buf, direct.Stdout)
}()
task, err := container.NewTask(ctx, direct.IOCreate)
if err != nil {
t.Fatal(err)
}
defer task.Delete(ctx)
status, err := task.Wait(ctx)
if err != nil {
t.Error(err)
}
if err := task.Start(ctx); err != nil {
t.Fatal(err)
}
if _, err := fmt.Fprint(direct.Stdin, expected); err != nil {
t.Error(err)
}
// load the container and re-load the task
if container, err = client.LoadContainer(ctx, id); err != nil {
t.Fatal(err)
}
if task, err = container.Task(ctx, direct.IOAttach); err != nil {
t.Fatal(err)
}
if _, err := fmt.Fprint(direct.Stdin, expected); err != nil {
t.Error(err)
}
direct.Stdin.Close()
if err := task.CloseIO(ctx, WithStdinCloser); err != nil {
t.Error(err)
}
<-status
wg.Wait()
if _, err := task.Delete(ctx); err != nil {
t.Error(err)
}
output := buf.String()
// we wrote the same thing after attach
expected = expected + expected
if output != expected {
t.Errorf("expected output %q but received %q", expected, output)
}
}
func newDirectIO(ctx context.Context, terminal bool) (*directIO, error) {
fifos, err := cio.NewFIFOSetInDir("", "", terminal)
if err != nil {
return nil, err
}
dio, err := cio.NewDirectIO(ctx, fifos)
if err != nil {
return nil, err
}
return &directIO{DirectIO: *dio}, nil
}
type directIO struct {
cio.DirectIO
}
// ioCreate returns IO available for use with task creation
func (f *directIO) IOCreate(id string) (cio.IO, error) {
return f, nil
}
// ioAttach returns IO available for use with task attachment
func (f *directIO) IOAttach(set *cio.FIFOSet) (cio.IO, error) {
return f, nil
}
func (f *directIO) Cancel() {
// nothing to cancel as all operations are handled externally
}
// Close closes all open fds
func (f *directIO) Close() error {
err := f.Stdin.Close()
if err2 := f.Stdout.Close(); err == nil {
err = err2
}
if err2 := f.Stderr.Close(); err == nil {
err = err2
}
return err
}
// Delete removes the underlying directory containing fifos
func (f *directIO) Delete() error {
return f.DirectIO.Close()
}
func TestContainerUsername(t *testing.T) {
t.Parallel()
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext(t)
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
direct, err := newDirectIO(ctx, false)
if err != nil {
t.Fatal(err)
}
defer direct.Delete()
var (
wg sync.WaitGroup
buf = bytes.NewBuffer(nil)
)
wg.Add(1)
go func() {
defer wg.Done()
io.Copy(buf, direct.Stdout)
}()
// squid user in the alpine image has a uid of 31
container, err := client.NewContainer(ctx, id,
WithNewSnapshot(id, image),
WithNewSpec(oci.WithImageConfig(image), oci.WithUsername("squid"), oci.WithProcessArgs("id", "-u")),
)
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
task, err := container.NewTask(ctx, direct.IOCreate)
if err != nil {
t.Fatal(err)
}
defer task.Delete(ctx)
statusC, err := task.Wait(ctx)
if err != nil {
t.Fatal(err)
}
if err := task.Start(ctx); err != nil {
t.Fatal(err)
}
<-statusC
wg.Wait()
output := strings.TrimSuffix(buf.String(), "\n")
if output != "31" {
t.Errorf("expected squid uid to be 31 but received %q", output)
}
}
func TestContainerUser(t *testing.T) {
t.Parallel()
t.Run("UserNameAndGroupName", func(t *testing.T) { testContainerUser(t, "squid:squid", "31:31") })
t.Run("UserIDAndGroupName", func(t *testing.T) { testContainerUser(t, "1001:squid", "1001:31") })
t.Run("UserNameAndGroupID", func(t *testing.T) { testContainerUser(t, "squid:1002", "31:1002") })
t.Run("UserIDAndGroupID", func(t *testing.T) { testContainerUser(t, "1001:1002", "1001:1002") })
}
func testContainerUser(t *testing.T, userstr, expectedOutput string) {
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext(t)
id = strings.Replace(t.Name(), "/", "_", -1)
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
direct, err := newDirectIO(ctx, false)
if err != nil {
t.Fatal(err)
}
defer direct.Delete()
var (
wg sync.WaitGroup
buf = bytes.NewBuffer(nil)
)
wg.Add(1)
go func() {
defer wg.Done()
io.Copy(buf, direct.Stdout)
}()
container, err := client.NewContainer(ctx, id,
WithNewSnapshot(id, image),
WithNewSpec(oci.WithImageConfig(image), oci.WithUser(userstr), oci.WithProcessArgs("sh", "-c", "echo $(id -u):$(id -g)")),
)
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
task, err := container.NewTask(ctx, direct.IOCreate)
if err != nil {
t.Fatal(err)
}
defer task.Delete(ctx)
statusC, err := task.Wait(ctx)
if err != nil {
t.Fatal(err)
}
if err := task.Start(ctx); err != nil {
t.Fatal(err)
}
<-statusC
wg.Wait()
output := strings.TrimSuffix(buf.String(), "\n")
if output != expectedOutput {
t.Errorf("expected uid:gid to be %q, but received %q", expectedOutput, output)
}
}
func TestContainerAttachProcess(t *testing.T) {
t.Parallel()
if runtime.GOOS == "windows" {
// On windows, closing the write side of the pipe closes the read
// side, sending an EOF to it and preventing reopening it.
// Hence this test will always fails on windows
t.Skip("invalid logic on windows")
}
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext(t)
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSnapshot(id, image), WithNewSpec(oci.WithImageConfig(image), withProcessArgs("sleep", "100")))
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
expected := "hello" + newLine
// creating IO early for easy resource cleanup
direct, err := newDirectIO(ctx, false)
if err != nil {
t.Fatal(err)
}
defer direct.Delete()
var (
wg sync.WaitGroup
buf = bytes.NewBuffer(nil)
)
wg.Add(1)
go func() {
defer wg.Done()
io.Copy(buf, direct.Stdout)
}()
task, err := container.NewTask(ctx, empty())
if err != nil {
t.Fatal(err)
}
defer task.Delete(ctx)
status, err := task.Wait(ctx)
if err != nil {
t.Error(err)
}
if err := task.Start(ctx); err != nil {
t.Fatal(err)
}
spec, err := container.Spec(ctx)
if err != nil {
t.Fatal(err)
}
processSpec := spec.Process
processSpec.Args = []string{"cat"}
execID := t.Name() + "_exec"
process, err := task.Exec(ctx, execID, processSpec, direct.IOCreate)
if err != nil {
t.Fatal(err)
}
processStatusC, err := process.Wait(ctx)
if err != nil {
t.Fatal(err)
}
if err := process.Start(ctx); err != nil {
t.Fatal(err)
}
if _, err := fmt.Fprint(direct.Stdin, expected); err != nil {
t.Error(err)
}
if process, err = task.LoadProcess(ctx, execID, direct.IOAttach); err != nil {
t.Fatal(err)
}
if _, err := fmt.Fprint(direct.Stdin, expected); err != nil {
t.Error(err)
}
direct.Stdin.Close()
if err := process.CloseIO(ctx, WithStdinCloser); err != nil {
t.Error(err)
}
<-processStatusC
wg.Wait()
if err := task.Kill(ctx, syscall.SIGKILL); err != nil {
t.Error(err)
}
output := buf.String()
// we wrote the same thing after attach
expected = expected + expected
if output != expected {
t.Errorf("expected output %q but received %q", expected, output)
}
<-status
}
func TestContainerLoadUnexistingProcess(t *testing.T) {
t.Parallel()
if runtime.GOOS == "windows" {
// On windows, closing the write side of the pipe closes the read
// side, sending an EOF to it and preventing reopening it.
// Hence this test will always fails on windows
t.Skip("invalid logic on windows")
}
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext(t)
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSnapshot(id, image), WithNewSpec(oci.WithImageConfig(image), withProcessArgs("sleep", "100")))
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
// creating IO early for easy resource cleanup
direct, err := newDirectIO(ctx, false)
if err != nil {
t.Fatal(err)
}
defer direct.Delete()
task, err := container.NewTask(ctx, empty())
if err != nil {
t.Fatal(err)
}
defer task.Delete(ctx)
status, err := task.Wait(ctx)
if err != nil {
t.Error(err)
}
if err := task.Start(ctx); err != nil {
t.Fatal(err)
}
if _, err = task.LoadProcess(ctx, "this-process-does-not-exist", direct.IOAttach); err == nil {
t.Fatal("an error should have occurred when loading a process that does not exist")