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// Copyright 2018 Google Inc.
//
// 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 container
import (
"os"
"strings"
"sync"
"testing"
"gvisor.googlesource.com/gvisor/pkg/sentry/control"
"gvisor.googlesource.com/gvisor/runsc/specutils"
"gvisor.googlesource.com/gvisor/runsc/test/testutil"
)
// TestMultiContainerSanity checks that it is possible to run 2 dead-simple
// containers in the same sandbox.
func TestMultiContainerSanity(t *testing.T) {
for _, conf := range configs(all...) {
t.Logf("Running test with conf: %+v", conf)
containerIDs := []string{
testutil.UniqueContainerID(),
testutil.UniqueContainerID(),
}
containerAnnotations := []map[string]string{
// The first container creates a sandbox.
map[string]string{
specutils.ContainerdContainerTypeAnnotation: specutils.ContainerdContainerTypeSandbox,
},
// The second container creates a container within the first
// container's sandbox.
map[string]string{
specutils.ContainerdContainerTypeAnnotation: specutils.ContainerdContainerTypeContainer,
specutils.ContainerdSandboxIDAnnotation: containerIDs[0],
},
}
rootDir, err := testutil.SetupRootDir()
if err != nil {
t.Fatalf("error creating root dir: %v", err)
}
defer os.RemoveAll(rootDir)
// Setup the containers.
containers := make([]*Container, 0, len(containerIDs))
for i, annotations := range containerAnnotations {
spec := testutil.NewSpecWithArgs("sleep", "100")
spec.Annotations = annotations
bundleDir, err := testutil.SetupContainerInRoot(rootDir, spec, conf)
if err != nil {
t.Fatalf("error setting up container: %v", err)
}
defer os.RemoveAll(bundleDir)
cont, err := Create(containerIDs[i], spec, conf, bundleDir, "", "")
if err != nil {
t.Fatalf("error creating container: %v", err)
}
defer cont.Destroy()
if err := cont.Start(conf); err != nil {
t.Fatalf("error starting container: %v", err)
}
containers = append(containers, cont)
}
expectedPL := []*control.Process{
{
UID: 0,
PID: 1,
PPID: 0,
C: 0,
Cmd: "sleep",
},
{
UID: 0,
PID: 2,
PPID: 0,
C: 0,
Cmd: "sleep",
},
}
// Check via ps that multiple processes are running.
if err := waitForProcessList(containers[0], expectedPL); err != nil {
t.Errorf("failed to wait for sleep to start: %v", err)
}
}
}
func TestMultiContainerWait(t *testing.T) {
t.Skip("Test is flakey.") // TODO: Remove.
containerIDs := []string{
testutil.UniqueContainerID(),
testutil.UniqueContainerID(),
}
containerAnnotations := []map[string]string{
// The first container creates a sandbox.
map[string]string{
specutils.ContainerdContainerTypeAnnotation: specutils.ContainerdContainerTypeSandbox,
},
// The second container creates a container within the first
// container's sandbox.
map[string]string{
specutils.ContainerdContainerTypeAnnotation: specutils.ContainerdContainerTypeContainer,
specutils.ContainerdSandboxIDAnnotation: containerIDs[0],
},
}
args := [][]string{
// The first container should run the entire duration of the
// test.
{"sleep", "100"},
// We'll wait on the second container, which is much shorter
// lived.
{"sleep", "1"},
}
rootDir, err := testutil.SetupRootDir()
if err != nil {
t.Fatalf("error creating root dir: %v", err)
}
defer os.RemoveAll(rootDir)
// Setup the containers.
containers := make([]*Container, 0, len(containerIDs))
for i, annotations := range containerAnnotations {
spec := testutil.NewSpecWithArgs(args[i][0], args[i][1])
spec.Annotations = annotations
conf := testutil.TestConfig()
bundleDir, err := testutil.SetupContainerInRoot(rootDir, spec, conf)
if err != nil {
t.Fatalf("error setting up container: %v", err)
}
defer os.RemoveAll(bundleDir)
cont, err := Create(containerIDs[i], spec, conf, bundleDir, "", "")
if err != nil {
t.Fatalf("error creating container: %v", err)
}
defer cont.Destroy()
if err := cont.Start(conf); err != nil {
t.Fatalf("error starting container: %v", err)
}
containers = append(containers, cont)
}
expectedPL := []*control.Process{
{
UID: 0,
PID: 1,
PPID: 0,
C: 0,
Cmd: "sleep",
},
{
UID: 0,
PID: 2,
PPID: 0,
C: 0,
Cmd: "sleep",
},
}
// Check via ps that multiple processes are running.
if err := waitForProcessList(containers[0], expectedPL); err != nil {
t.Errorf("failed to wait for sleep to start: %v", err)
}
// Wait on the short lived container from multiple goroutines.
wg := sync.WaitGroup{}
for i := 0; i < 3; i++ {
wg.Add(1)
go func() {
defer wg.Done()
if ws, err := containers[1].Wait(); err != nil {
t.Errorf("failed to wait for process %q: %v", strings.Join(containers[1].Spec.Process.Args, " "), err)
} else if es := ws.ExitStatus(); es != 0 {
t.Errorf("process %q exited with non-zero status %d", strings.Join(containers[1].Spec.Process.Args, " "), es)
}
if _, err := containers[1].Wait(); err == nil {
t.Errorf("wait for stopped process %q should fail", strings.Join(containers[1].Spec.Process.Args, " "))
}
// After Wait returns, ensure that the root container is running and
// the child has finished.
if err := waitForProcessList(containers[0], expectedPL[:1]); err != nil {
t.Errorf("failed to wait for %q to start: %v", strings.Join(containers[0].Spec.Process.Args, " "), err)
}
}()
}
// Also wait via PID.
for i := 0; i < 3; i++ {
wg.Add(1)
go func() {
defer wg.Done()
const pid = 2
if ws, err := containers[0].WaitPID(pid); err != nil {
t.Errorf("failed to wait for PID %d: %v", pid, err)
} else if es := ws.ExitStatus(); es != 0 {
t.Errorf("PID %d exited with non-zero status %d", pid, es)
}
if _, err := containers[0].WaitPID(pid); err == nil {
t.Errorf("wait for stopped PID %d should fail", pid)
}
}()
}
wg.Wait()
}
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