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container_linux_test.go
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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"
"os/exec"
"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/linux/runctypes"
"github.com/containerd/containerd/oci"
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()
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,
WithNewSpec(oci.WithImageConfig(image), withProcessArgs("sleep", "30"), memory),
WithNewSnapshot(id, image))
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()
id = t.Name()
)
defer cancel()
image, err := client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSpec(oci.WithImageConfig(image), oci.WithProcessArgs("sleep", "30")), WithNewSnapshot(id, image))
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(), func(_ context.Context, client *Client, r *TaskInfo) error {
r.Options = &runctypes.CreateOptions{
ShimCgroup: path,
}
return nil
})
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 atleast 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()
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSpec(oci.WithImageConfig(image), withProcessArgs("sleep", "30")), WithNewSnapshot(id, image))
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 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()
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSpec(oci.WithImageConfig(image), withCat()), WithNewSnapshot(id, image))
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
expected := "hello" + newLine
direct, err := newDirectIO(ctx)
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) (*directIO, error) {
fifos, err := cio.NewFIFOSetInDir("", "", false)
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()
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
direct, err := newDirectIO(ctx)
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()
id = strings.Replace(t.Name(), "/", "_", -1)
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
direct, err := newDirectIO(ctx)
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()
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSpec(oci.WithImageConfig(image), withProcessArgs("sleep", "100")), WithNewSnapshot(id, image))
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)
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 TestContainerUserID(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()
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
direct, err := newDirectIO(ctx)
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)
}()
// adm user in the alpine image has a uid of 3 and gid of 4.
container, err := client.NewContainer(ctx, id,
WithNewSnapshot(id, image),
WithNewSpec(oci.WithImageConfig(image), oci.WithUserID(3), 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 != "3:4" {
t.Errorf("expected uid:gid to be 3:4, but received %q", output)
}
}
func TestContainerKillAll(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()
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("sh", "-c", "top"),
oci.WithHostNamespace(specs.PIDNamespace),
),
)
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
stdout := bytes.NewBuffer(nil)
task, err := container.NewTask(ctx, cio.NewCreator(withByteBuffers(stdout)))
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)
}
if err := task.Kill(ctx, syscall.SIGKILL, WithKillAll); err != nil {
t.Error(err)
}
<-statusC
if _, err := task.Delete(ctx); err != nil {
t.Fatal(err)
}
}
func TestShimSigkilled(t *testing.T) {
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext()
id = t.Name()
)
defer cancel()
// redis unset its PDeathSignal making it a good candidate
image, err = client.Pull(ctx, "docker.io/library/redis:alpine", WithPullUnpack)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSpec(oci.WithImageConfig(image)), WithNewSnapshot(id, image))
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.Error(err)
}
pid := task.Pid()
if pid < 1 {
t.Fatalf("invalid task pid %d", pid)
}
if err := task.Start(ctx); err != nil {
t.Fatal(err)
}
// SIGKILL the shim
if err := exec.Command("pkill", "-KILL", "containerd-s").Run(); err != nil {
t.Fatalf("failed to kill shim: %v", err)
}
<-statusC
for i := 0; i < 10; i++ {
if err := unix.Kill(int(pid), 0); err == unix.ESRCH {
break
}
time.Sleep(10 * time.Millisecond)
}
if err := unix.Kill(int(pid), 0); err != unix.ESRCH {
t.Errorf("pid %d still exists", pid)
}
}
func TestDaemonRestartWithRunningShim(t *testing.T) {
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext()
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(ctx, id, WithNewSpec(oci.WithImageConfig(image), oci.WithProcessArgs("sleep", "100")), WithNewSnapshot(id, image))
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.Error(err)
}
pid := task.Pid()
if pid < 1 {
t.Fatalf("invalid task pid %d", pid)
}
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, cancel := context.WithTimeout(ctx, 1*time.Second)
c, err := ctrd.waitForStart(waitCtx)
cancel()
if err != nil {
t.Fatal(err)
}
c.Close()
statusC, err = task.Wait(ctx)
if err != nil {
t.Error(err)
}
if err := task.Kill(ctx, syscall.SIGKILL); err != nil {
t.Fatal(err)
}
<-statusC
if err := unix.Kill(int(pid), 0); err != unix.ESRCH {
t.Errorf("pid %d still exists", pid)
}
}
func TestContainerRuntimeOptions(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()
id = t.Name()
)
defer cancel()
image, err = client.GetImage(ctx, testImage)
if err != nil {
t.Fatal(err)
}
container, err := client.NewContainer(
ctx, id,
WithNewSpec(oci.WithImageConfig(image), withExitStatus(7)),
WithNewSnapshot(id, image),
WithRuntime("io.containerd.runtime.v1.linux", &runctypes.RuncOptions{Runtime: "no-runc"}),
)
if err != nil {
t.Fatal(err)
}
defer container.Delete(ctx, WithSnapshotCleanup)
task, err := container.NewTask(ctx, empty())
if err == nil {
t.Errorf("task creation should have failed")
task.Delete(ctx)
return
}
if !strings.Contains(err.Error(), `"no-runc"`) {
t.Errorf("task creation should have failed because of lack of executable. Instead failed with: %v", err.Error())
}
}
func TestContainerKillInitPidHost(t *testing.T) {
client, err := newClient(t, address)
if err != nil {
t.Fatal(err)
}
defer client.Close()
var (
image Image
ctx, cancel = testContext()
id = t.Name()