diff options
Diffstat (limited to 'runsc/container/container_test.go')
| -rw-r--r-- | runsc/container/container_test.go | 2381 |
1 files changed, 0 insertions, 2381 deletions
diff --git a/runsc/container/container_test.go b/runsc/container/container_test.go deleted file mode 100644 index 548c68087..000000000 --- a/runsc/container/container_test.go +++ /dev/null @@ -1,2381 +0,0 @@ -// Copyright 2018 The gVisor 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 container - -import ( - "bytes" - "flag" - "fmt" - "io" - "io/ioutil" - "math" - "os" - "path" - "path/filepath" - "reflect" - "strconv" - "strings" - "syscall" - "testing" - "time" - - "github.com/cenkalti/backoff" - specs "github.com/opencontainers/runtime-spec/specs-go" - "gvisor.dev/gvisor/pkg/abi/linux" - "gvisor.dev/gvisor/pkg/bits" - "gvisor.dev/gvisor/pkg/log" - "gvisor.dev/gvisor/pkg/sentry/control" - "gvisor.dev/gvisor/pkg/sentry/kernel" - "gvisor.dev/gvisor/pkg/sentry/kernel/auth" - "gvisor.dev/gvisor/pkg/sync" - "gvisor.dev/gvisor/pkg/test/testutil" - "gvisor.dev/gvisor/pkg/urpc" - "gvisor.dev/gvisor/runsc/boot/platforms" - "gvisor.dev/gvisor/runsc/config" - "gvisor.dev/gvisor/runsc/specutils" -) - -// waitForProcessList waits for the given process list to show up in the container. -func waitForProcessList(cont *Container, want []*control.Process) error { - cb := func() error { - got, err := cont.Processes() - if err != nil { - err = fmt.Errorf("error getting process data from container: %v", err) - return &backoff.PermanentError{Err: err} - } - if !procListsEqual(got, want) { - return fmt.Errorf("container got process list: %s, want: %s", procListToString(got), procListToString(want)) - } - return nil - } - // Gives plenty of time as tests can run slow under --race. - return testutil.Poll(cb, 30*time.Second) -} - -func waitForProcessCount(cont *Container, want int) error { - cb := func() error { - pss, err := cont.Processes() - if err != nil { - err = fmt.Errorf("error getting process data from container: %v", err) - return &backoff.PermanentError{Err: err} - } - if got := len(pss); got != want { - log.Infof("Waiting for process count to reach %d. Current: %d", want, got) - return fmt.Errorf("wrong process count, got: %d, want: %d", got, want) - } - return nil - } - // Gives plenty of time as tests can run slow under --race. - return testutil.Poll(cb, 30*time.Second) -} - -func blockUntilWaitable(pid int) error { - _, _, err := specutils.RetryEintr(func() (uintptr, uintptr, error) { - var err error - _, _, err1 := syscall.Syscall6(syscall.SYS_WAITID, 1, uintptr(pid), 0, syscall.WEXITED|syscall.WNOWAIT, 0, 0) - if err1 != 0 { - err = err1 - } - return 0, 0, err - }) - return err -} - -// procListsEqual is used to check whether 2 Process lists are equal. Fields -// set to -1 in wants are ignored. Timestamp and threads fields are always -// ignored. -func procListsEqual(gots, wants []*control.Process) bool { - if len(gots) != len(wants) { - return false - } - for i := range gots { - got := gots[i] - want := wants[i] - - if want.UID != math.MaxUint32 && want.UID != got.UID { - return false - } - if want.PID != -1 && want.PID != got.PID { - return false - } - if want.PPID != -1 && want.PPID != got.PPID { - return false - } - if len(want.TTY) != 0 && want.TTY != got.TTY { - return false - } - if len(want.Cmd) != 0 && want.Cmd != got.Cmd { - return false - } - } - return true -} - -type processBuilder struct { - process control.Process -} - -func newProcessBuilder() *processBuilder { - return &processBuilder{ - process: control.Process{ - UID: math.MaxUint32, - PID: -1, - PPID: -1, - }, - } -} - -func (p *processBuilder) Cmd(cmd string) *processBuilder { - p.process.Cmd = cmd - return p -} - -func (p *processBuilder) PID(pid kernel.ThreadID) *processBuilder { - p.process.PID = pid - return p -} - -func (p *processBuilder) PPID(ppid kernel.ThreadID) *processBuilder { - p.process.PPID = ppid - return p -} - -func (p *processBuilder) UID(uid auth.KUID) *processBuilder { - p.process.UID = uid - return p -} - -func (p *processBuilder) Process() *control.Process { - return &p.process -} - -func procListToString(pl []*control.Process) string { - strs := make([]string, 0, len(pl)) - for _, p := range pl { - strs = append(strs, fmt.Sprintf("%+v", p)) - } - return fmt.Sprintf("[%s]", strings.Join(strs, ",")) -} - -// createWriteableOutputFile creates an output file that can be read and -// written to in the sandbox. -func createWriteableOutputFile(path string) (*os.File, error) { - outputFile, err := os.OpenFile(path, os.O_CREATE|os.O_EXCL|os.O_RDWR, 0666) - if err != nil { - return nil, fmt.Errorf("error creating file: %q, %v", path, err) - } - - // Chmod to allow writing after umask. - if err := outputFile.Chmod(0666); err != nil { - return nil, fmt.Errorf("error chmoding file: %q, %v", path, err) - } - return outputFile, nil -} - -func waitForFileNotEmpty(f *os.File) error { - op := func() error { - fi, err := f.Stat() - if err != nil { - return err - } - if fi.Size() == 0 { - return fmt.Errorf("file %q is empty", f.Name()) - } - return nil - } - - return testutil.Poll(op, 30*time.Second) -} - -func waitForFileExist(path string) error { - op := func() error { - if _, err := os.Stat(path); os.IsNotExist(err) { - return err - } - return nil - } - - return testutil.Poll(op, 30*time.Second) -} - -// readOutputNum reads a file at given filepath and returns the int at the -// requested position. -func readOutputNum(file string, position int) (int, error) { - f, err := os.Open(file) - if err != nil { - return 0, fmt.Errorf("error opening file: %q, %v", file, err) - } - - // Ensure that there is content in output file. - if err := waitForFileNotEmpty(f); err != nil { - return 0, fmt.Errorf("error waiting for output file: %v", err) - } - - b, err := ioutil.ReadAll(f) - if err != nil { - return 0, fmt.Errorf("error reading file: %v", err) - } - if len(b) == 0 { - return 0, fmt.Errorf("error no content was read") - } - - // Strip leading null bytes caused by file offset not being 0 upon restore. - b = bytes.Trim(b, "\x00") - nums := strings.Split(string(b), "\n") - - if position >= len(nums) { - return 0, fmt.Errorf("position %v is not within the length of content %v", position, nums) - } - if position == -1 { - // Expectation of newline at the end of last position. - position = len(nums) - 2 - } - num, err := strconv.Atoi(nums[position]) - if err != nil { - return 0, fmt.Errorf("error getting number from file: %v", err) - } - return num, nil -} - -// run starts the sandbox and waits for it to exit, checking that the -// application succeeded. -func run(spec *specs.Spec, conf *config.Config) error { - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - return fmt.Errorf("error setting up container: %v", err) - } - defer cleanup() - - // Create, start and wait for the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - Attached: true, - } - ws, err := Run(conf, args) - if err != nil { - return fmt.Errorf("running container: %v", err) - } - if !ws.Exited() || ws.ExitStatus() != 0 { - return fmt.Errorf("container failed, waitStatus: %v", ws) - } - return nil -} - -type configOption int - -const ( - overlay configOption = iota - ptrace - kvm - nonExclusiveFS -) - -var ( - noOverlay = append(platformOptions, nonExclusiveFS) - all = append(noOverlay, overlay) -) - -// configs generates different configurations to run tests. -func configs(t *testing.T, opts ...configOption) map[string]*config.Config { - // Always load the default config. - cs := make(map[string]*config.Config) - testutil.TestConfig(t) - for _, o := range opts { - c := testutil.TestConfig(t) - switch o { - case overlay: - c.Overlay = true - cs["overlay"] = c - case ptrace: - c.Platform = platforms.Ptrace - cs["ptrace"] = c - case kvm: - c.Platform = platforms.KVM - cs["kvm"] = c - case nonExclusiveFS: - c.FileAccess = config.FileAccessShared - cs["non-exclusive"] = c - default: - panic(fmt.Sprintf("unknown config option %v", o)) - } - } - return cs -} - -func configsWithVFS2(t *testing.T, opts ...configOption) map[string]*config.Config { - all := configs(t, opts...) - for key, value := range configs(t, opts...) { - value.VFS2 = true - all[key+"VFS2"] = value - } - return all -} - -// TestLifecycle tests the basic Create/Start/Signal/Destroy container lifecycle. -// It verifies after each step that the container can be loaded from disk, and -// has the correct status. -func TestLifecycle(t *testing.T) { - // Start the child reaper. - childReaper := &testutil.Reaper{} - childReaper.Start() - defer childReaper.Stop() - - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - // The container will just sleep for a long time. We will kill it before - // it finishes sleeping. - spec := testutil.NewSpecWithArgs("sleep", "100") - - rootDir, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // expectedPL lists the expected process state of the container. - expectedPL := []*control.Process{ - newProcessBuilder().Cmd("sleep").Process(), - } - // Create the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - c, err := New(conf, args) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - defer c.Destroy() - - // Load the container from disk and check the status. - c, err = Load(rootDir, args.ID) - if err != nil { - t.Fatalf("error loading container: %v", err) - } - if got, want := c.Status, Created; got != want { - t.Errorf("container status got %v, want %v", got, want) - } - - // List should return the container id. - ids, err := List(rootDir) - if err != nil { - t.Fatalf("error listing containers: %v", err) - } - if got, want := ids, []string{args.ID}; !reflect.DeepEqual(got, want) { - t.Errorf("container list got %v, want %v", got, want) - } - - // Start the container. - if err := c.Start(conf); err != nil { - t.Fatalf("error starting container: %v", err) - } - - // Load the container from disk and check the status. - c, err = Load(rootDir, args.ID) - if err != nil { - t.Fatalf("error loading container: %v", err) - } - if got, want := c.Status, Running; got != want { - t.Errorf("container status got %v, want %v", got, want) - } - - // Verify that "sleep 100" is running. - if err := waitForProcessList(c, expectedPL); err != nil { - t.Error(err) - } - - // Wait on the container. - ch := make(chan error) - go func() { - ws, err := c.Wait() - if err != nil { - ch <- err - } - if got, want := ws.Signal(), syscall.SIGTERM; got != want { - ch <- fmt.Errorf("got signal %v, want %v", got, want) - } - ch <- nil - }() - - // Wait a bit to ensure that we've started waiting on - // the container before we signal. - time.Sleep(time.Second) - - // Send the container a SIGTERM which will cause it to stop. - if err := c.SignalContainer(syscall.SIGTERM, false); err != nil { - t.Fatalf("error sending signal %v to container: %v", syscall.SIGTERM, err) - } - - // Wait for it to die. - if err := <-ch; err != nil { - t.Fatalf("error waiting for container: %v", err) - } - - // Load the container from disk and check the status. - c, err = Load(rootDir, args.ID) - if err != nil { - t.Fatalf("error loading container: %v", err) - } - if got, want := c.Status, Stopped; got != want { - t.Errorf("container status got %v, want %v", got, want) - } - - // Destroy the container. - if err := c.Destroy(); err != nil { - t.Fatalf("error destroying container: %v", err) - } - - // List should not return the container id. - ids, err = List(rootDir) - if err != nil { - t.Fatalf("error listing containers: %v", err) - } - if len(ids) != 0 { - t.Errorf("expected container list to be empty, but got %v", ids) - } - - // Loading the container by id should fail. - if _, err = Load(rootDir, args.ID); err == nil { - t.Errorf("expected loading destroyed container to fail, but it did not") - } - }) - } -} - -// Test the we can execute the application with different path formats. -func TestExePath(t *testing.T) { - // Create two directories that will be prepended to PATH. - firstPath, err := ioutil.TempDir(testutil.TmpDir(), "first") - if err != nil { - t.Fatalf("error creating temporary directory: %v", err) - } - defer os.RemoveAll(firstPath) - secondPath, err := ioutil.TempDir(testutil.TmpDir(), "second") - if err != nil { - t.Fatalf("error creating temporary directory: %v", err) - } - defer os.RemoveAll(secondPath) - - // Create two minimal executables in the second path, two of which - // will be masked by files in first path. - for _, p := range []string{"unmasked", "masked1", "masked2"} { - path := filepath.Join(secondPath, p) - f, err := os.OpenFile(path, os.O_CREATE|os.O_EXCL|os.O_RDWR, 0777) - if err != nil { - t.Fatalf("error opening path: %v", err) - } - defer f.Close() - if _, err := io.WriteString(f, "#!/bin/true\n"); err != nil { - t.Fatalf("error writing contents: %v", err) - } - } - - // Create a non-executable file in the first path which masks a healthy - // executable in the second. - nonExecutable := filepath.Join(firstPath, "masked1") - f2, err := os.OpenFile(nonExecutable, os.O_CREATE|os.O_EXCL, 0666) - if err != nil { - t.Fatalf("error opening file: %v", err) - } - f2.Close() - - // Create a non-regular file in the first path which masks a healthy - // executable in the second. - nonRegular := filepath.Join(firstPath, "masked2") - if err := os.Mkdir(nonRegular, 0777); err != nil { - t.Fatalf("error making directory: %v", err) - } - - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - for _, test := range []struct { - path string - success bool - }{ - {path: "true", success: true}, - {path: "bin/true", success: true}, - {path: "/bin/true", success: true}, - {path: "thisfiledoesntexit", success: false}, - {path: "bin/thisfiledoesntexit", success: false}, - {path: "/bin/thisfiledoesntexit", success: false}, - - {path: "unmasked", success: true}, - {path: filepath.Join(firstPath, "unmasked"), success: false}, - {path: filepath.Join(secondPath, "unmasked"), success: true}, - - {path: "masked1", success: true}, - {path: filepath.Join(firstPath, "masked1"), success: false}, - {path: filepath.Join(secondPath, "masked1"), success: true}, - - {path: "masked2", success: true}, - {path: filepath.Join(firstPath, "masked2"), success: false}, - {path: filepath.Join(secondPath, "masked2"), success: true}, - } { - t.Run(fmt.Sprintf("path=%s,success=%t", test.path, test.success), func(t *testing.T) { - spec := testutil.NewSpecWithArgs(test.path) - spec.Process.Env = []string{ - fmt.Sprintf("PATH=%s:%s:%s", firstPath, secondPath, os.Getenv("PATH")), - } - - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("exec: error setting up container: %v", err) - } - defer cleanup() - - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - Attached: true, - } - ws, err := Run(conf, args) - - if test.success { - if err != nil { - t.Errorf("exec: error running container: %v", err) - } - if ws.ExitStatus() != 0 { - t.Errorf("exec: got exit status %v want %v", ws.ExitStatus(), 0) - } - } else { - if err == nil { - t.Errorf("exec: got: no error, want: error") - } - } - }) - } - }) - } -} - -// Test the we can retrieve the application exit status from the container. -func TestAppExitStatus(t *testing.T) { - doAppExitStatus(t, false) -} - -// This is TestAppExitStatus for VFSv2. -func TestAppExitStatusVFS2(t *testing.T) { - doAppExitStatus(t, true) -} - -func doAppExitStatus(t *testing.T, vfs2 bool) { - // First container will succeed. - succSpec := testutil.NewSpecWithArgs("true") - conf := testutil.TestConfig(t) - conf.VFS2 = vfs2 - _, bundleDir, cleanup, err := testutil.SetupContainer(succSpec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - args := Args{ - ID: testutil.RandomContainerID(), - Spec: succSpec, - BundleDir: bundleDir, - Attached: true, - } - ws, err := Run(conf, args) - if err != nil { - t.Fatalf("error running container: %v", err) - } - if ws.ExitStatus() != 0 { - t.Errorf("got exit status %v want %v", ws.ExitStatus(), 0) - } - - // Second container exits with non-zero status. - wantStatus := 123 - errSpec := testutil.NewSpecWithArgs("bash", "-c", fmt.Sprintf("exit %d", wantStatus)) - - _, bundleDir2, cleanup2, err := testutil.SetupContainer(errSpec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup2() - - args2 := Args{ - ID: testutil.RandomContainerID(), - Spec: errSpec, - BundleDir: bundleDir2, - Attached: true, - } - ws, err = Run(conf, args2) - if err != nil { - t.Fatalf("error running container: %v", err) - } - if ws.ExitStatus() != wantStatus { - t.Errorf("got exit status %v want %v", ws.ExitStatus(), wantStatus) - } -} - -// TestExec verifies that a container can exec a new program. -func TestExec(t *testing.T) { - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - dir, err := ioutil.TempDir(testutil.TmpDir(), "exec-test") - if err != nil { - t.Fatalf("error creating temporary directory: %v", err) - } - // Note that some shells may exec the final command in a sequence as - // an optimization. We avoid this here by adding the exit 0. - cmd := fmt.Sprintf("ln -s /bin/true %q/symlink && sleep 100 && exit 0", dir) - spec := testutil.NewSpecWithArgs("sh", "-c", cmd) - - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and start the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont, err := New(conf, args) - 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) - } - - // Wait until sleep is running to ensure the symlink was created. - expectedPL := []*control.Process{ - newProcessBuilder().Cmd("sh").Process(), - newProcessBuilder().Cmd("sleep").Process(), - } - if err := waitForProcessList(cont, expectedPL); err != nil { - t.Fatalf("waitForProcessList: %v", err) - } - - for _, tc := range []struct { - name string - args control.ExecArgs - }{ - { - name: "complete", - args: control.ExecArgs{ - Filename: "/bin/true", - Argv: []string{"/bin/true"}, - }, - }, - { - name: "filename", - args: control.ExecArgs{ - Filename: "/bin/true", - }, - }, - { - name: "argv", - args: control.ExecArgs{ - Argv: []string{"/bin/true"}, - }, - }, - { - name: "filename resolution", - args: control.ExecArgs{ - Filename: "true", - Envv: []string{"PATH=/bin"}, - }, - }, - { - name: "argv resolution", - args: control.ExecArgs{ - Argv: []string{"true"}, - Envv: []string{"PATH=/bin"}, - }, - }, - { - name: "argv symlink", - args: control.ExecArgs{ - Argv: []string{filepath.Join(dir, "symlink")}, - }, - }, - { - name: "working dir", - args: control.ExecArgs{ - Argv: []string{"/bin/sh", "-c", `if [[ "${PWD}" != "/tmp" ]]; then exit 1; fi`}, - WorkingDirectory: "/tmp", - }, - }, - { - name: "user", - args: control.ExecArgs{ - Argv: []string{"/bin/sh", "-c", `if [[ "$(id -u)" != "343" ]]; then exit 1; fi`}, - KUID: 343, - }, - }, - { - name: "group", - args: control.ExecArgs{ - Argv: []string{"/bin/sh", "-c", `if [[ "$(id -g)" != "343" ]]; then exit 1; fi`}, - KGID: 343, - }, - }, - { - name: "env", - args: control.ExecArgs{ - Argv: []string{"/bin/sh", "-c", `if [[ "${FOO}" != "123" ]]; then exit 1; fi`}, - Envv: []string{"FOO=123"}, - }, - }, - } { - t.Run(tc.name, func(t *testing.T) { - // t.Parallel() - if ws, err := cont.executeSync(&tc.args); err != nil { - t.Fatalf("executeAsync(%+v): %v", tc.args, err) - } else if ws != 0 { - t.Fatalf("executeAsync(%+v) failed with exit: %v", tc.args, ws) - } - }) - } - }) - } -} - -// TestExecProcList verifies that a container can exec a new program and it -// shows correcly in the process list. -func TestExecProcList(t *testing.T) { - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - const uid = 343 - spec := testutil.NewSpecWithArgs("sleep", "100") - - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and start the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont, err := New(conf, args) - 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) - } - - execArgs := &control.ExecArgs{ - Filename: "/bin/sleep", - Argv: []string{"/bin/sleep", "5"}, - WorkingDirectory: "/", - KUID: uid, - } - - // Verify that "sleep 100" and "sleep 5" are running after exec. First, - // start running exec (which blocks). - ch := make(chan error) - go func() { - exitStatus, err := cont.executeSync(execArgs) - if err != nil { - ch <- err - } else if exitStatus != 0 { - ch <- fmt.Errorf("failed with exit status: %v", exitStatus) - } else { - ch <- nil - } - }() - - // expectedPL lists the expected process state of the container. - expectedPL := []*control.Process{ - newProcessBuilder().PID(1).PPID(0).Cmd("sleep").UID(0).Process(), - newProcessBuilder().PID(2).PPID(0).Cmd("sleep").UID(uid).Process(), - } - if err := waitForProcessList(cont, expectedPL); err != nil { - t.Fatalf("error waiting for processes: %v", err) - } - - // Ensure that exec finished without error. - select { - case <-time.After(10 * time.Second): - t.Fatalf("container timed out waiting for exec to finish.") - case err := <-ch: - if err != nil { - t.Errorf("container failed to exec %v: %v", args, err) - } - } - }) - } -} - -// TestKillPid verifies that we can signal individual exec'd processes. -func TestKillPid(t *testing.T) { - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - app, err := testutil.FindFile("test/cmd/test_app/test_app") - if err != nil { - t.Fatal("error finding test_app:", err) - } - - const nProcs = 4 - spec := testutil.NewSpecWithArgs(app, "task-tree", "--depth", strconv.Itoa(nProcs-1), "--width=1", "--pause=true") - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and start the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont, err := New(conf, args) - 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) - } - - // Verify that all processes are running. - if err := waitForProcessCount(cont, nProcs); err != nil { - t.Fatalf("timed out waiting for processes to start: %v", err) - } - - // Kill the child process with the largest PID. - procs, err := cont.Processes() - if err != nil { - t.Fatalf("failed to get process list: %v", err) - } - var pid int32 - for _, p := range procs { - if pid < int32(p.PID) { - pid = int32(p.PID) - } - } - if err := cont.SignalProcess(syscall.SIGKILL, pid); err != nil { - t.Fatalf("failed to signal process %d: %v", pid, err) - } - - // Verify that one process is gone. - if err := waitForProcessCount(cont, nProcs-1); err != nil { - t.Fatalf("error waiting for processes: %v", err) - } - - procs, err = cont.Processes() - if err != nil { - t.Fatalf("failed to get process list: %v", err) - } - for _, p := range procs { - if pid == int32(p.PID) { - t.Fatalf("pid %d is still alive, which should be killed", pid) - } - } - }) - } -} - -// TestCheckpointRestore creates a container that continuously writes successive integers -// to a file. To test checkpoint and restore functionality, the container is -// checkpointed and the last number printed to the file is recorded. Then, it is restored in two -// new containers and the first number printed from these containers is checked. Both should -// be the next consecutive number after the last number from the checkpointed container. -func TestCheckpointRestore(t *testing.T) { - // Skip overlay because test requires writing to host file. - for name, conf := range configs(t, noOverlay...) { - t.Run(name, func(t *testing.T) { - dir, err := ioutil.TempDir(testutil.TmpDir(), "checkpoint-test") - if err != nil { - t.Fatalf("ioutil.TempDir failed: %v", err) - } - defer os.RemoveAll(dir) - if err := os.Chmod(dir, 0777); err != nil { - t.Fatalf("error chmoding file: %q, %v", dir, err) - } - - outputPath := filepath.Join(dir, "output") - outputFile, err := createWriteableOutputFile(outputPath) - if err != nil { - t.Fatalf("error creating output file: %v", err) - } - defer outputFile.Close() - - script := fmt.Sprintf("for ((i=0; ;i++)); do echo $i >> %q; sleep 1; done", outputPath) - spec := testutil.NewSpecWithArgs("bash", "-c", script) - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and start the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont, err := New(conf, args) - 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) - } - - // Set the image path, which is where the checkpoint image will be saved. - imagePath := filepath.Join(dir, "test-image-file") - - // Create the image file and open for writing. - file, err := os.OpenFile(imagePath, os.O_CREATE|os.O_EXCL|os.O_RDWR, 0644) - if err != nil { - t.Fatalf("error opening new file at imagePath: %v", err) - } - defer file.Close() - - // Wait until application has ran. - if err := waitForFileNotEmpty(outputFile); err != nil { - t.Fatalf("Failed to wait for output file: %v", err) - } - - // Checkpoint running container; save state into new file. - if err := cont.Checkpoint(file); err != nil { - t.Fatalf("error checkpointing container to empty file: %v", err) - } - defer os.RemoveAll(imagePath) - - lastNum, err := readOutputNum(outputPath, -1) - if err != nil { - t.Fatalf("error with outputFile: %v", err) - } - - // Delete and recreate file before restoring. - if err := os.Remove(outputPath); err != nil { - t.Fatalf("error removing file") - } - outputFile2, err := createWriteableOutputFile(outputPath) - if err != nil { - t.Fatalf("error creating output file: %v", err) - } - defer outputFile2.Close() - - // Restore into a new container. - args2 := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont2, err := New(conf, args2) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - defer cont2.Destroy() - - if err := cont2.Restore(spec, conf, imagePath); err != nil { - t.Fatalf("error restoring container: %v", err) - } - - // Wait until application has ran. - if err := waitForFileNotEmpty(outputFile2); err != nil { - t.Fatalf("Failed to wait for output file: %v", err) - } - - firstNum, err := readOutputNum(outputPath, 0) - if err != nil { - t.Fatalf("error with outputFile: %v", err) - } - - // Check that lastNum is one less than firstNum and that the container picks - // up from where it left off. - if lastNum+1 != firstNum { - t.Errorf("error numbers not in order, previous: %d, next: %d", lastNum, firstNum) - } - cont2.Destroy() - - // Restore into another container! - // Delete and recreate file before restoring. - if err := os.Remove(outputPath); err != nil { - t.Fatalf("error removing file") - } - outputFile3, err := createWriteableOutputFile(outputPath) - if err != nil { - t.Fatalf("error creating output file: %v", err) - } - defer outputFile3.Close() - - // Restore into a new container. - args3 := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont3, err := New(conf, args3) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - defer cont3.Destroy() - - if err := cont3.Restore(spec, conf, imagePath); err != nil { - t.Fatalf("error restoring container: %v", err) - } - - // Wait until application has ran. - if err := waitForFileNotEmpty(outputFile3); err != nil { - t.Fatalf("Failed to wait for output file: %v", err) - } - - firstNum2, err := readOutputNum(outputPath, 0) - if err != nil { - t.Fatalf("error with outputFile: %v", err) - } - - // Check that lastNum is one less than firstNum and that the container picks - // up from where it left off. - if lastNum+1 != firstNum2 { - t.Errorf("error numbers not in order, previous: %d, next: %d", lastNum, firstNum2) - } - cont3.Destroy() - }) - } -} - -// TestUnixDomainSockets checks that Checkpoint/Restore works in cases -// with filesystem Unix Domain Socket use. -func TestUnixDomainSockets(t *testing.T) { - // Skip overlay because test requires writing to host file. - for name, conf := range configs(t, noOverlay...) { - t.Run(name, func(t *testing.T) { - // UDS path is limited to 108 chars for compatibility with older systems. - // Use '/tmp' (instead of testutil.TmpDir) to ensure the size limit is - // not exceeded. Assumes '/tmp' exists in the system. - dir, err := ioutil.TempDir("/tmp", "uds-test") - if err != nil { - t.Fatalf("ioutil.TempDir failed: %v", err) - } - defer os.RemoveAll(dir) - - outputPath := filepath.Join(dir, "uds_output") - outputFile, err := os.OpenFile(outputPath, os.O_CREATE|os.O_EXCL|os.O_RDWR, 0666) - if err != nil { - t.Fatalf("error creating output file: %v", err) - } - defer outputFile.Close() - - app, err := testutil.FindFile("test/cmd/test_app/test_app") - if err != nil { - t.Fatal("error finding test_app:", err) - } - - socketPath := filepath.Join(dir, "uds_socket") - defer os.Remove(socketPath) - - spec := testutil.NewSpecWithArgs(app, "uds", "--file", outputPath, "--socket", socketPath) - spec.Process.User = specs.User{ - UID: uint32(os.Getuid()), - GID: uint32(os.Getgid()), - } - spec.Mounts = []specs.Mount{{ - Type: "bind", - Destination: dir, - Source: dir, - }} - - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and start the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont, err := New(conf, args) - 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) - } - - // Set the image path, the location where the checkpoint image will be saved. - imagePath := filepath.Join(dir, "test-image-file") - - // Create the image file and open for writing. - file, err := os.OpenFile(imagePath, os.O_CREATE|os.O_EXCL|os.O_RDWR, 0644) - if err != nil { - t.Fatalf("error opening new file at imagePath: %v", err) - } - defer file.Close() - defer os.RemoveAll(imagePath) - - // Wait until application has ran. - if err := waitForFileNotEmpty(outputFile); err != nil { - t.Fatalf("Failed to wait for output file: %v", err) - } - - // Checkpoint running container; save state into new file. - if err := cont.Checkpoint(file); err != nil { - t.Fatalf("error checkpointing container to empty file: %v", err) - } - - // Read last number outputted before checkpoint. - lastNum, err := readOutputNum(outputPath, -1) - if err != nil { - t.Fatalf("error with outputFile: %v", err) - } - - // Delete and recreate file before restoring. - if err := os.Remove(outputPath); err != nil { - t.Fatalf("error removing file") - } - outputFile2, err := os.OpenFile(outputPath, os.O_CREATE|os.O_EXCL|os.O_RDWR, 0666) - if err != nil { - t.Fatalf("error creating output file: %v", err) - } - defer outputFile2.Close() - - // Restore into a new container. - argsRestore := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - contRestore, err := New(conf, argsRestore) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - defer contRestore.Destroy() - - if err := contRestore.Restore(spec, conf, imagePath); err != nil { - t.Fatalf("error restoring container: %v", err) - } - - // Wait until application has ran. - if err := waitForFileNotEmpty(outputFile2); err != nil { - t.Fatalf("Failed to wait for output file: %v", err) - } - - // Read first number outputted after restore. - firstNum, err := readOutputNum(outputPath, 0) - if err != nil { - t.Fatalf("error with outputFile: %v", err) - } - - // Check that lastNum is one less than firstNum. - if lastNum+1 != firstNum { - t.Errorf("error numbers not consecutive, previous: %d, next: %d", lastNum, firstNum) - } - contRestore.Destroy() - }) - } -} - -// TestPauseResume tests that we can successfully pause and resume a container. -// The container will keep touching a file to indicate it's running. The test -// pauses the container, removes the file, and checks that it doesn't get -// recreated. Then it resumes the container, verify that the file gets created -// again. -func TestPauseResume(t *testing.T) { - for name, conf := range configs(t, noOverlay...) { - t.Run(name, func(t *testing.T) { - tmpDir, err := ioutil.TempDir(testutil.TmpDir(), "lock") - if err != nil { - t.Fatalf("error creating temp dir: %v", err) - } - defer os.RemoveAll(tmpDir) - - running := path.Join(tmpDir, "running") - script := fmt.Sprintf("while [[ true ]]; do touch %q; sleep 0.1; done", running) - spec := testutil.NewSpecWithArgs("/bin/bash", "-c", script) - - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and start the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont, err := New(conf, args) - 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) - } - - // Wait until container starts running, observed by the existence of running - // file. - if err := waitForFileExist(running); err != nil { - t.Errorf("error waiting for container to start: %v", err) - } - - // Pause the running container. - if err := cont.Pause(); err != nil { - t.Errorf("error pausing container: %v", err) - } - if got, want := cont.Status, Paused; got != want { - t.Errorf("container status got %v, want %v", got, want) - } - - if err := os.Remove(running); err != nil { - t.Fatalf("os.Remove(%q) failed: %v", running, err) - } - // Script touches the file every 100ms. Give a bit a time for it to run to - // catch the case that pause didn't work. - time.Sleep(200 * time.Millisecond) - if _, err := os.Stat(running); !os.IsNotExist(err) { - t.Fatalf("container did not pause: file exist check: %v", err) - } - - // Resume the running container. - if err := cont.Resume(); err != nil { - t.Errorf("error pausing container: %v", err) - } - if got, want := cont.Status, Running; got != want { - t.Errorf("container status got %v, want %v", got, want) - } - - // Verify that the file is once again created by container. - if err := waitForFileExist(running); err != nil { - t.Fatalf("error resuming container: file exist check: %v", err) - } - }) - } -} - -// TestPauseResumeStatus makes sure that the statuses are set correctly -// with calls to pause and resume and that pausing and resuming only -// occurs given the correct state. -func TestPauseResumeStatus(t *testing.T) { - spec := testutil.NewSpecWithArgs("sleep", "20") - conf := testutil.TestConfig(t) - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and start the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont, err := New(conf, args) - 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) - } - - // Pause the running container. - if err := cont.Pause(); err != nil { - t.Errorf("error pausing container: %v", err) - } - if got, want := cont.Status, Paused; got != want { - t.Errorf("container status got %v, want %v", got, want) - } - - // Try to Pause again. Should cause error. - if err := cont.Pause(); err == nil { - t.Errorf("error pausing container that was already paused: %v", err) - } - if got, want := cont.Status, Paused; got != want { - t.Errorf("container status got %v, want %v", got, want) - } - - // Resume the running container. - if err := cont.Resume(); err != nil { - t.Errorf("error resuming container: %v", err) - } - if got, want := cont.Status, Running; got != want { - t.Errorf("container status got %v, want %v", got, want) - } - - // Try to resume again. Should cause error. - if err := cont.Resume(); err == nil { - t.Errorf("error resuming container already running: %v", err) - } - if got, want := cont.Status, Running; got != want { - t.Errorf("container status got %v, want %v", got, want) - } -} - -// TestCapabilities verifies that: -// - Running exec as non-root UID and GID will result in an error (because the -// executable file can't be read). -// - Running exec as non-root with CAP_DAC_OVERRIDE succeeds because it skips -// this check. -func TestCapabilities(t *testing.T) { - // Pick uid/gid different than ours. - uid := auth.KUID(os.Getuid() + 1) - gid := auth.KGID(os.Getgid() + 1) - - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - spec := testutil.NewSpecWithArgs("sleep", "100") - rootDir, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and start the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont, err := New(conf, args) - 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) - } - - // expectedPL lists the expected process state of the container. - expectedPL := []*control.Process{ - newProcessBuilder().Cmd("sleep").Process(), - } - if err := waitForProcessList(cont, expectedPL); err != nil { - t.Fatalf("Failed to wait for sleep to start, err: %v", err) - } - - // Create an executable that can't be run with the specified UID:GID. - // This shouldn't be callable within the container until we add the - // CAP_DAC_OVERRIDE capability to skip the access check. - exePath := filepath.Join(rootDir, "exe") - if err := ioutil.WriteFile(exePath, []byte("#!/bin/sh\necho hello"), 0770); err != nil { - t.Fatalf("couldn't create executable: %v", err) - } - defer os.Remove(exePath) - - // Need to traverse the intermediate directory. - os.Chmod(rootDir, 0755) - - execArgs := &control.ExecArgs{ - Filename: exePath, - Argv: []string{exePath}, - WorkingDirectory: "/", - KUID: uid, - KGID: gid, - Capabilities: &auth.TaskCapabilities{}, - } - - // "exe" should fail because we don't have the necessary permissions. - if _, err := cont.executeSync(execArgs); err == nil { - t.Fatalf("container executed without error, but an error was expected") - } - - // Now we run with the capability enabled and should succeed. - execArgs.Capabilities = &auth.TaskCapabilities{ - EffectiveCaps: auth.CapabilitySetOf(linux.CAP_DAC_OVERRIDE), - } - // "exe" should not fail this time. - if _, err := cont.executeSync(execArgs); err != nil { - t.Fatalf("container failed to exec %v: %v", args, err) - } - }) - } -} - -// TestRunNonRoot checks that sandbox can be configured when running as -// non-privileged user. -func TestRunNonRoot(t *testing.T) { - for name, conf := range configsWithVFS2(t, noOverlay...) { - t.Run(name, func(t *testing.T) { - spec := testutil.NewSpecWithArgs("/bin/true") - - // Set a random user/group with no access to "blocked" dir. - spec.Process.User.UID = 343 - spec.Process.User.GID = 2401 - spec.Process.Capabilities = nil - - // User running inside container can't list '$TMP/blocked' and would fail to - // mount it. - dir, err := ioutil.TempDir(testutil.TmpDir(), "blocked") - if err != nil { - t.Fatalf("ioutil.TempDir() failed: %v", err) - } - if err := os.Chmod(dir, 0700); err != nil { - t.Fatalf("os.MkDir(%q) failed: %v", dir, err) - } - dir = path.Join(dir, "test") - if err := os.Mkdir(dir, 0755); err != nil { - t.Fatalf("os.MkDir(%q) failed: %v", dir, err) - } - - src, err := ioutil.TempDir(testutil.TmpDir(), "src") - if err != nil { - t.Fatalf("ioutil.TempDir() failed: %v", err) - } - - spec.Mounts = append(spec.Mounts, specs.Mount{ - Destination: dir, - Source: src, - Type: "bind", - }) - - if err := run(spec, conf); err != nil { - t.Fatalf("error running sandbox: %v", err) - } - }) - } -} - -// TestMountNewDir checks that runsc will create destination directory if it -// doesn't exit. -func TestMountNewDir(t *testing.T) { - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - root, err := ioutil.TempDir(testutil.TmpDir(), "root") - if err != nil { - t.Fatal("ioutil.TempDir() failed:", err) - } - - srcDir := path.Join(root, "src", "dir", "anotherdir") - if err := os.MkdirAll(srcDir, 0755); err != nil { - t.Fatalf("os.MkDir(%q) failed: %v", srcDir, err) - } - - mountDir := path.Join(root, "dir", "anotherdir") - - spec := testutil.NewSpecWithArgs("/bin/ls", mountDir) - spec.Mounts = append(spec.Mounts, specs.Mount{ - Destination: mountDir, - Source: srcDir, - Type: "bind", - }) - // Extra points for creating the mount with a readonly root. - spec.Root.Readonly = true - - if err := run(spec, conf); err != nil { - t.Fatalf("error running sandbox: %v", err) - } - }) - } -} - -func TestReadonlyRoot(t *testing.T) { - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - spec := testutil.NewSpecWithArgs("sleep", "100") - spec.Root.Readonly = true - - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - c, err := New(conf, args) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - defer c.Destroy() - if err := c.Start(conf); err != nil { - t.Fatalf("error starting container: %v", err) - } - - // Read mounts to check that root is readonly. - out, ws, err := executeCombinedOutput(c, "/bin/sh", "-c", "mount | grep ' / '") - if err != nil || ws != 0 { - t.Fatalf("exec failed, ws: %v, err: %v", ws, err) - } - t.Logf("root mount: %q", out) - if !strings.Contains(string(out), "(ro)") { - t.Errorf("root not mounted readonly: %q", out) - } - - // Check that file cannot be created. - ws, err = execute(c, "/bin/touch", "/foo") - if err != nil { - t.Fatalf("touch file in ro mount: %v", err) - } - if !ws.Exited() || syscall.Errno(ws.ExitStatus()) != syscall.EPERM { - t.Fatalf("wrong waitStatus: %v", ws) - } - }) - } -} - -func TestReadonlyMount(t *testing.T) { - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - dir, err := ioutil.TempDir(testutil.TmpDir(), "ro-mount") - if err != nil { - t.Fatalf("ioutil.TempDir() failed: %v", err) - } - spec := testutil.NewSpecWithArgs("sleep", "100") - spec.Mounts = append(spec.Mounts, specs.Mount{ - Destination: dir, - Source: dir, - Type: "bind", - Options: []string{"ro"}, - }) - spec.Root.Readonly = false - - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - c, err := New(conf, args) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - defer c.Destroy() - if err := c.Start(conf); err != nil { - t.Fatalf("error starting container: %v", err) - } - - // Read mounts to check that volume is readonly. - cmd := fmt.Sprintf("mount | grep ' %s '", dir) - out, ws, err := executeCombinedOutput(c, "/bin/sh", "-c", cmd) - if err != nil || ws != 0 { - t.Fatalf("exec failed, ws: %v, err: %v", ws, err) - } - t.Logf("mount: %q", out) - if !strings.Contains(string(out), "(ro)") { - t.Errorf("volume not mounted readonly: %q", out) - } - - // Check that file cannot be created. - ws, err = execute(c, "/bin/touch", path.Join(dir, "file")) - if err != nil { - t.Fatalf("touch file in ro mount: %v", err) - } - if !ws.Exited() || syscall.Errno(ws.ExitStatus()) != syscall.EPERM { - t.Fatalf("wrong WaitStatus: %v", ws) - } - }) - } -} - -func TestUIDMap(t *testing.T) { - for name, conf := range configsWithVFS2(t, noOverlay...) { - t.Run(name, func(t *testing.T) { - testDir, err := ioutil.TempDir(testutil.TmpDir(), "test-mount") - if err != nil { - t.Fatalf("ioutil.TempDir() failed: %v", err) - } - defer os.RemoveAll(testDir) - testFile := path.Join(testDir, "testfile") - - spec := testutil.NewSpecWithArgs("touch", "/tmp/testfile") - uid := os.Getuid() - gid := os.Getgid() - spec.Linux = &specs.Linux{ - Namespaces: []specs.LinuxNamespace{ - {Type: specs.UserNamespace}, - {Type: specs.PIDNamespace}, - {Type: specs.MountNamespace}, - }, - UIDMappings: []specs.LinuxIDMapping{ - { - ContainerID: 0, - HostID: uint32(uid), - Size: 1, - }, - }, - GIDMappings: []specs.LinuxIDMapping{ - { - ContainerID: 0, - HostID: uint32(gid), - Size: 1, - }, - }, - } - - spec.Mounts = append(spec.Mounts, specs.Mount{ - Destination: "/tmp", - Source: testDir, - Type: "bind", - }) - - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create, start and wait for the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - c, err := New(conf, args) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - defer c.Destroy() - if err := c.Start(conf); err != nil { - t.Fatalf("error starting container: %v", err) - } - - ws, err := c.Wait() - if err != nil { - t.Fatalf("error waiting on container: %v", err) - } - if !ws.Exited() || ws.ExitStatus() != 0 { - t.Fatalf("container failed, waitStatus: %v", ws) - } - st := syscall.Stat_t{} - if err := syscall.Stat(testFile, &st); err != nil { - t.Fatalf("error stat /testfile: %v", err) - } - - if st.Uid != uint32(uid) || st.Gid != uint32(gid) { - t.Fatalf("UID: %d (%d) GID: %d (%d)", st.Uid, uid, st.Gid, gid) - } - }) - } -} - -// TestAbbreviatedIDs checks that runsc supports using abbreviated container -// IDs in place of full IDs. -func TestAbbreviatedIDs(t *testing.T) { - doAbbreviatedIDsTest(t, false) -} - -func TestAbbreviatedIDsVFS2(t *testing.T) { - doAbbreviatedIDsTest(t, true) -} - -func doAbbreviatedIDsTest(t *testing.T, vfs2 bool) { - rootDir, cleanup, err := testutil.SetupRootDir() - if err != nil { - t.Fatalf("error creating root dir: %v", err) - } - defer cleanup() - - conf := testutil.TestConfig(t) - conf.RootDir = rootDir - conf.VFS2 = vfs2 - - cids := []string{ - "foo-" + testutil.RandomContainerID(), - "bar-" + testutil.RandomContainerID(), - "baz-" + testutil.RandomContainerID(), - } - for _, cid := range cids { - spec := testutil.NewSpecWithArgs("sleep", "100") - bundleDir, cleanup, err := testutil.SetupBundleDir(spec) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and start the container. - args := Args{ - ID: cid, - Spec: spec, - BundleDir: bundleDir, - } - cont, err := New(conf, args) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - defer cont.Destroy() - } - - // These should all be unambigious. - unambiguous := map[string]string{ - "f": cids[0], - cids[0]: cids[0], - "bar": cids[1], - cids[1]: cids[1], - "baz": cids[2], - cids[2]: cids[2], - } - for shortid, longid := range unambiguous { - if _, err := Load(rootDir, shortid); err != nil { - t.Errorf("%q should resolve to %q: %v", shortid, longid, err) - } - } - - // These should be ambiguous. - ambiguous := []string{ - "b", - "ba", - } - for _, shortid := range ambiguous { - if s, err := Load(rootDir, shortid); err == nil { - t.Errorf("%q should be ambiguous, but resolved to %q", shortid, s.ID) - } - } -} - -func TestGoferExits(t *testing.T) { - doGoferExitTest(t, false) -} - -func TestGoferExitsVFS2(t *testing.T) { - doGoferExitTest(t, true) -} - -func doGoferExitTest(t *testing.T, vfs2 bool) { - spec := testutil.NewSpecWithArgs("/bin/sleep", "10000") - conf := testutil.TestConfig(t) - conf.VFS2 = vfs2 - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and start the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - c, err := New(conf, args) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - defer c.Destroy() - if err := c.Start(conf); err != nil { - t.Fatalf("error starting container: %v", err) - } - - // Kill sandbox and expect gofer to exit on its own. - sandboxProc, err := os.FindProcess(c.Sandbox.Pid) - if err != nil { - t.Fatalf("error finding sandbox process: %v", err) - } - if err := sandboxProc.Kill(); err != nil { - t.Fatalf("error killing sandbox process: %v", err) - } - - err = blockUntilWaitable(c.GoferPid) - if err != nil && err != syscall.ECHILD { - t.Errorf("error waiting for gofer to exit: %v", err) - } -} - -func TestRootNotMount(t *testing.T) { - appSym, err := testutil.FindFile("test/cmd/test_app/test_app") - if err != nil { - t.Fatal("error finding test_app:", err) - } - - app, err := filepath.EvalSymlinks(appSym) - if err != nil { - t.Fatalf("error resolving %q symlink: %v", appSym, err) - } - log.Infof("App path %q is a symlink to %q", appSym, app) - - static, err := testutil.IsStatic(app) - if err != nil { - t.Fatalf("error reading application binary: %v", err) - } - if !static { - // This happens during race builds; we cannot map in shared - // libraries also, so we need to skip the test. - t.Skip() - } - - root := filepath.Dir(app) - exe := "/" + filepath.Base(app) - log.Infof("Executing %q in %q", exe, root) - - spec := testutil.NewSpecWithArgs(exe, "help") - spec.Root.Path = root - spec.Root.Readonly = true - spec.Mounts = nil - - conf := testutil.TestConfig(t) - if err := run(spec, conf); err != nil { - t.Fatalf("error running sandbox: %v", err) - } -} - -func TestUserLog(t *testing.T) { - app, err := testutil.FindFile("test/cmd/test_app/test_app") - if err != nil { - t.Fatal("error finding test_app:", err) - } - - // sched_rr_get_interval - not implemented in gvisor. - num := strconv.Itoa(syscall.SYS_SCHED_RR_GET_INTERVAL) - spec := testutil.NewSpecWithArgs(app, "syscall", "--syscall="+num) - conf := testutil.TestConfig(t) - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - dir, err := ioutil.TempDir(testutil.TmpDir(), "user_log_test") - if err != nil { - t.Fatalf("error creating tmp dir: %v", err) - } - userLog := filepath.Join(dir, "user.log") - - // Create, start and wait for the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - UserLog: userLog, - Attached: true, - } - ws, err := Run(conf, args) - if err != nil { - t.Fatalf("error running container: %v", err) - } - if !ws.Exited() || ws.ExitStatus() != 0 { - t.Fatalf("container failed, waitStatus: %v", ws) - } - - out, err := ioutil.ReadFile(userLog) - if err != nil { - t.Fatalf("error opening user log file %q: %v", userLog, err) - } - if want := "Unsupported syscall sched_rr_get_interval("; !strings.Contains(string(out), want) { - t.Errorf("user log file doesn't contain %q, out: %s", want, string(out)) - } -} - -func TestWaitOnExitedSandbox(t *testing.T) { - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - // Run a shell that sleeps for 1 second and then exits with a - // non-zero code. - const wantExit = 17 - cmd := fmt.Sprintf("sleep 1; exit %d", wantExit) - spec := testutil.NewSpecWithArgs("/bin/sh", "-c", cmd) - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and Start the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - c, err := New(conf, args) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - defer c.Destroy() - if err := c.Start(conf); err != nil { - t.Fatalf("error starting container: %v", err) - } - - // Wait on the sandbox. This will make an RPC to the sandbox - // and get the actual exit status of the application. - ws, err := c.Wait() - if err != nil { - t.Fatalf("error waiting on container: %v", err) - } - if got := ws.ExitStatus(); got != wantExit { - t.Errorf("got exit status %d, want %d", got, wantExit) - } - - // Now the sandbox has exited, but the zombie sandbox process - // still exists. Calling Wait() now will return the sandbox - // exit status. - ws, err = c.Wait() - if err != nil { - t.Fatalf("error waiting on container: %v", err) - } - if got := ws.ExitStatus(); got != wantExit { - t.Errorf("got exit status %d, want %d", got, wantExit) - } - }) - } -} - -func TestDestroyNotStarted(t *testing.T) { - doDestroyNotStartedTest(t, false) -} - -func TestDestroyNotStartedVFS2(t *testing.T) { - doDestroyNotStartedTest(t, true) -} - -func doDestroyNotStartedTest(t *testing.T, vfs2 bool) { - spec := testutil.NewSpecWithArgs("/bin/sleep", "100") - conf := testutil.TestConfig(t) - conf.VFS2 = vfs2 - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create the container and check that it can be destroyed. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - c, err := New(conf, args) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - if err := c.Destroy(); err != nil { - t.Fatalf("deleting non-started container failed: %v", err) - } -} - -// TestDestroyStarting attempts to force a race between start and destroy. -func TestDestroyStarting(t *testing.T) { - doDestroyNotStartedTest(t, false) -} - -func TestDestroyStartedVFS2(t *testing.T) { - doDestroyNotStartedTest(t, true) -} - -func doDestroyStartingTest(t *testing.T, vfs2 bool) { - for i := 0; i < 10; i++ { - spec := testutil.NewSpecWithArgs("/bin/sleep", "100") - conf := testutil.TestConfig(t) - conf.VFS2 = vfs2 - rootDir, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create the container and check that it can be destroyed. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - c, err := New(conf, args) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - - // Container is not thread safe, so load another instance to run in - // concurrently. - startCont, err := Load(rootDir, args.ID) - if err != nil { - t.Fatalf("error loading container: %v", err) - } - wg := sync.WaitGroup{} - wg.Add(1) - go func() { - defer wg.Done() - // Ignore failures, start can fail if destroy runs first. - startCont.Start(conf) - }() - - wg.Add(1) - go func() { - defer wg.Done() - if err := c.Destroy(); err != nil { - t.Errorf("deleting non-started container failed: %v", err) - } - }() - wg.Wait() - } -} - -func TestCreateWorkingDir(t *testing.T) { - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - tmpDir, err := ioutil.TempDir(testutil.TmpDir(), "cwd-create") - if err != nil { - t.Fatalf("ioutil.TempDir() failed: %v", err) - } - dir := path.Join(tmpDir, "new/working/dir") - - // touch will fail if the directory doesn't exist. - spec := testutil.NewSpecWithArgs("/bin/touch", path.Join(dir, "file")) - spec.Process.Cwd = dir - spec.Root.Readonly = true - - if err := run(spec, conf); err != nil { - t.Fatalf("Error running container: %v", err) - } - }) - } -} - -// TestMountPropagation verifies that mount propagates to slave but not to -// private mounts. -func TestMountPropagation(t *testing.T) { - // Setup dir structure: - // - src: is mounted as shared and is used as source for both private and - // slave mounts - // - dir: will be bind mounted inside src and should propagate to slave - tmpDir, err := ioutil.TempDir(testutil.TmpDir(), "mount") - if err != nil { - t.Fatalf("ioutil.TempDir() failed: %v", err) - } - src := filepath.Join(tmpDir, "src") - srcMnt := filepath.Join(src, "mnt") - dir := filepath.Join(tmpDir, "dir") - for _, path := range []string{src, srcMnt, dir} { - if err := os.MkdirAll(path, 0777); err != nil { - t.Fatalf("MkdirAll(%q): %v", path, err) - } - } - dirFile := filepath.Join(dir, "file") - f, err := os.Create(dirFile) - if err != nil { - t.Fatalf("os.Create(%q): %v", dirFile, err) - } - f.Close() - - // Setup src as a shared mount. - if err := syscall.Mount(src, src, "bind", syscall.MS_BIND, ""); err != nil { - t.Fatalf("mount(%q, %q, MS_BIND): %v", dir, srcMnt, err) - } - if err := syscall.Mount("", src, "", syscall.MS_SHARED, ""); err != nil { - t.Fatalf("mount(%q, MS_SHARED): %v", srcMnt, err) - } - - spec := testutil.NewSpecWithArgs("sleep", "1000") - - priv := filepath.Join(tmpDir, "priv") - slave := filepath.Join(tmpDir, "slave") - spec.Mounts = []specs.Mount{ - { - Source: src, - Destination: priv, - Type: "bind", - Options: []string{"private"}, - }, - { - Source: src, - Destination: slave, - Type: "bind", - Options: []string{"slave"}, - }, - } - - conf := testutil.TestConfig(t) - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont, err := New(conf, args) - if err != nil { - t.Fatalf("creating container: %v", err) - } - defer cont.Destroy() - - if err := cont.Start(conf); err != nil { - t.Fatalf("starting container: %v", err) - } - - // After the container is started, mount dir inside source and check what - // happens to both destinations. - if err := syscall.Mount(dir, srcMnt, "bind", syscall.MS_BIND, ""); err != nil { - t.Fatalf("mount(%q, %q, MS_BIND): %v", dir, srcMnt, err) - } - - // Check that mount didn't propagate to private mount. - privFile := filepath.Join(priv, "mnt", "file") - if ws, err := execute(cont, "/usr/bin/test", "!", "-f", privFile); err != nil || ws != 0 { - t.Fatalf("exec: test ! -f %q, ws: %v, err: %v", privFile, ws, err) - } - - // Check that mount propagated to slave mount. - slaveFile := filepath.Join(slave, "mnt", "file") - if ws, err := execute(cont, "/usr/bin/test", "-f", slaveFile); err != nil || ws != 0 { - t.Fatalf("exec: test -f %q, ws: %v, err: %v", privFile, ws, err) - } -} - -func TestMountSymlink(t *testing.T) { - for name, conf := range configsWithVFS2(t, all...) { - t.Run(name, func(t *testing.T) { - dir, err := ioutil.TempDir(testutil.TmpDir(), "mount-symlink") - if err != nil { - t.Fatalf("ioutil.TempDir() failed: %v", err) - } - defer os.RemoveAll(dir) - - source := path.Join(dir, "source") - target := path.Join(dir, "target") - for _, path := range []string{source, target} { - if err := os.MkdirAll(path, 0777); err != nil { - t.Fatalf("os.MkdirAll(): %v", err) - } - } - f, err := os.Create(path.Join(source, "file")) - if err != nil { - t.Fatalf("os.Create(): %v", err) - } - f.Close() - - link := path.Join(dir, "link") - if err := os.Symlink(target, link); err != nil { - t.Fatalf("os.Symlink(%q, %q): %v", target, link, err) - } - - spec := testutil.NewSpecWithArgs("/bin/sleep", "1000") - - // Mount to a symlink to ensure the mount code will follow it and mount - // at the symlink target. - spec.Mounts = append(spec.Mounts, specs.Mount{ - Type: "bind", - Destination: link, - Source: source, - }) - - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - cont, err := New(conf, args) - if err != nil { - t.Fatalf("creating container: %v", err) - } - defer cont.Destroy() - - if err := cont.Start(conf); err != nil { - t.Fatalf("starting container: %v", err) - } - - // Check that symlink was resolved and mount was created where the symlink - // is pointing to. - file := path.Join(target, "file") - if ws, err := execute(cont, "/usr/bin/test", "-f", file); err != nil || ws != 0 { - t.Fatalf("exec: test -f %q, ws: %v, err: %v", file, ws, err) - } - }) - } -} - -// Check that --net-raw disables the CAP_NET_RAW capability. -func TestNetRaw(t *testing.T) { - capNetRaw := strconv.FormatUint(bits.MaskOf64(int(linux.CAP_NET_RAW)), 10) - app, err := testutil.FindFile("test/cmd/test_app/test_app") - if err != nil { - t.Fatal("error finding test_app:", err) - } - - for _, enableRaw := range []bool{true, false} { - conf := testutil.TestConfig(t) - conf.EnableRaw = enableRaw - - test := "--enabled" - if !enableRaw { - test = "--disabled" - } - - spec := testutil.NewSpecWithArgs(app, "capability", test, capNetRaw) - if err := run(spec, conf); err != nil { - t.Fatalf("Error running container: %v", err) - } - } -} - -// TestTTYField checks TTY field returned by container.Processes(). -func TestTTYField(t *testing.T) { - stop := testutil.StartReaper() - defer stop() - - testApp, err := testutil.FindFile("test/cmd/test_app/test_app") - if err != nil { - t.Fatal("error finding test_app:", err) - } - - testCases := []struct { - name string - useTTY bool - wantTTYField string - }{ - { - name: "no tty", - useTTY: false, - wantTTYField: "?", - }, - { - name: "tty used", - useTTY: true, - wantTTYField: "pts/0", - }, - } - - for _, test := range testCases { - for _, vfs2 := range []bool{false, true} { - name := test.name - if vfs2 { - name += "-vfs2" - } - t.Run(name, func(t *testing.T) { - conf := testutil.TestConfig(t) - conf.VFS2 = vfs2 - - // We will run /bin/sleep, possibly with an open TTY. - cmd := []string{"/bin/sleep", "10000"} - if test.useTTY { - // Run inside the "pty-runner". - cmd = append([]string{testApp, "pty-runner"}, cmd...) - } - - spec := testutil.NewSpecWithArgs(cmd...) - _, bundleDir, cleanup, err := testutil.SetupContainer(spec, conf) - if err != nil { - t.Fatalf("error setting up container: %v", err) - } - defer cleanup() - - // Create and start the container. - args := Args{ - ID: testutil.RandomContainerID(), - Spec: spec, - BundleDir: bundleDir, - } - c, err := New(conf, args) - if err != nil { - t.Fatalf("error creating container: %v", err) - } - defer c.Destroy() - if err := c.Start(conf); err != nil { - t.Fatalf("error starting container: %v", err) - } - - // Wait for sleep to be running, and check the TTY - // field. - var gotTTYField string - cb := func() error { - ps, err := c.Processes() - if err != nil { - err = fmt.Errorf("error getting process data from container: %v", err) - return &backoff.PermanentError{Err: err} - } - for _, p := range ps { - if strings.Contains(p.Cmd, "sleep") { - gotTTYField = p.TTY - return nil - } - } - return fmt.Errorf("sleep not running") - } - if err := testutil.Poll(cb, 30*time.Second); err != nil { - t.Fatalf("error waiting for sleep process: %v", err) - } - - if gotTTYField != test.wantTTYField { - t.Errorf("tty field got %q, want %q", gotTTYField, test.wantTTYField) - } - }) - } - } -} - -func execute(cont *Container, name string, arg ...string) (syscall.WaitStatus, error) { - args := &control.ExecArgs{ - Filename: name, - Argv: append([]string{name}, arg...), - } - return cont.executeSync(args) -} - -func executeCombinedOutput(cont *Container, name string, arg ...string) ([]byte, syscall.WaitStatus, error) { - r, w, err := os.Pipe() - if err != nil { - return nil, 0, err - } - defer r.Close() - - args := &control.ExecArgs{ - Filename: name, - Argv: append([]string{name}, arg...), - FilePayload: urpc.FilePayload{Files: []*os.File{os.Stdin, w, w}}, - } - ws, err := cont.executeSync(args) - w.Close() - if err != nil { - return nil, 0, err - } - out, err := ioutil.ReadAll(r) - return out, ws, err -} - -// executeSync synchronously executes a new process. -func (cont *Container) executeSync(args *control.ExecArgs) (syscall.WaitStatus, error) { - pid, err := cont.Execute(args) - if err != nil { - return 0, fmt.Errorf("error executing: %v", err) - } - ws, err := cont.WaitPID(pid) - if err != nil { - return 0, fmt.Errorf("error waiting: %v", err) - } - return ws, nil -} - -func TestMain(m *testing.M) { - log.SetLevel(log.Debug) - flag.Parse() - if err := testutil.ConfigureExePath(); err != nil { - panic(err.Error()) - } - specutils.MaybeRunAsRoot() - os.Exit(m.Run()) -} |