1619 lines
46 KiB
Go
1619 lines
46 KiB
Go
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package container
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import (
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"bytes"
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"fmt"
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"io/ioutil"
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"os"
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"path"
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"path/filepath"
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"reflect"
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"strconv"
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"strings"
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"sync"
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"syscall"
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"testing"
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"time"
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"github.com/cenkalti/backoff"
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specs "github.com/opencontainers/runtime-spec/specs-go"
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"gvisor.googlesource.com/gvisor/pkg/abi/linux"
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"gvisor.googlesource.com/gvisor/pkg/log"
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"gvisor.googlesource.com/gvisor/pkg/sentry/control"
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"gvisor.googlesource.com/gvisor/pkg/sentry/kernel/auth"
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"gvisor.googlesource.com/gvisor/runsc/boot"
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"gvisor.googlesource.com/gvisor/runsc/test/testutil"
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)
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// waitForProcessList waits for the given process list to show up in the container.
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func waitForProcessList(cont *Container, want []*control.Process) error {
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cb := func() error {
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got, err := cont.Processes()
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if err != nil {
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err = fmt.Errorf("error getting process data from container: %v", err)
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return &backoff.PermanentError{Err: err}
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}
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if !procListsEqual(got, want) {
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return fmt.Errorf("container got process list: %s, want: %s", procListToString(got), procListToString(want))
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}
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return nil
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}
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// Gives plenty of time as tests can run slow under --race.
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return testutil.Poll(cb, 30*time.Second)
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}
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func waitForProcessCount(cont *Container, want int) error {
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cb := func() error {
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pss, err := cont.Processes()
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if err != nil {
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err = fmt.Errorf("error getting process data from container: %v", err)
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return &backoff.PermanentError{Err: err}
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}
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if got := len(pss); got != want {
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return fmt.Errorf("wrong process count, got: %d, want: %d", got, want)
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}
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return nil
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}
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// Gives plenty of time as tests can run slow under --race.
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return testutil.Poll(cb, 30*time.Second)
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}
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func blockUntilWaitable(pid int) error {
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_, _, err := testutil.RetryEintr(func() (uintptr, uintptr, error) {
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var err error
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_, _, err1 := syscall.Syscall6(syscall.SYS_WAITID, 1, uintptr(pid), 0, syscall.WEXITED|syscall.WNOWAIT, 0, 0)
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if err1 != 0 {
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err = err1
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}
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return 0, 0, err
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})
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return err
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}
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// procListsEqual is used to check whether 2 Process lists are equal for all
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// implemented fields.
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func procListsEqual(got, want []*control.Process) bool {
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if len(got) != len(want) {
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return false
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}
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for i := range got {
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pd1 := got[i]
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pd2 := want[i]
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// Zero out unimplemented and timing dependant fields.
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pd1.Time = ""
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pd1.STime = ""
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pd1.C = 0
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if *pd1 != *pd2 {
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return false
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}
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}
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return true
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}
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// getAndCheckProcLists is similar to waitForProcessList, but does not wait and retry the
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// test for equality. This is because we already confirmed that exec occurred.
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func getAndCheckProcLists(cont *Container, want []*control.Process) error {
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got, err := cont.Processes()
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if err != nil {
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return fmt.Errorf("error getting process data from container: %v", err)
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}
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if procListsEqual(got, want) {
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return nil
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}
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return fmt.Errorf("container got process list: %s, want: %s", procListToString(got), procListToString(want))
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}
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func procListToString(pl []*control.Process) string {
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strs := make([]string, 0, len(pl))
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for _, p := range pl {
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strs = append(strs, fmt.Sprintf("%+v", p))
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}
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return fmt.Sprintf("[%s]", strings.Join(strs, ","))
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}
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// createWriteableOutputFile creates an output file that can be read and
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// written to in the sandbox.
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func createWriteableOutputFile(path string) (*os.File, error) {
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outputFile, err := os.OpenFile(path, os.O_CREATE|os.O_EXCL|os.O_RDWR, 0666)
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if err != nil {
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return nil, fmt.Errorf("error creating file: %q, %v", path, err)
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}
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// Chmod to allow writing after umask.
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if err := outputFile.Chmod(0666); err != nil {
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return nil, fmt.Errorf("error chmoding file: %q, %v", path, err)
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}
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return outputFile, nil
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}
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func waitForFile(f *os.File) error {
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op := func() error {
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fi, err := f.Stat()
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if err != nil {
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return err
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}
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if fi.Size() == 0 {
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return fmt.Errorf("file %q is empty", f.Name())
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}
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return nil
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}
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timeout := 5 * time.Second
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if testutil.RaceEnabled {
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// Race makes slow things even slow, so bump the timeout.
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timeout = 3 * timeout
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}
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return testutil.Poll(op, timeout)
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}
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// readOutputNum reads a file at given filepath and returns the int at the
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// requested position.
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func readOutputNum(file string, position int) (int, error) {
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f, err := os.Open(file)
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if err != nil {
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return 0, fmt.Errorf("error opening file: %q, %v", file, err)
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}
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// Ensure that there is content in output file.
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if err := waitForFile(f); err != nil {
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return 0, fmt.Errorf("error waiting for output file: %v", err)
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}
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b, err := ioutil.ReadAll(f)
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if err != nil {
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return 0, fmt.Errorf("error reading file: %v", err)
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}
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if len(b) == 0 {
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return 0, fmt.Errorf("error no content was read")
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}
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// Strip leading null bytes caused by file offset not being 0 upon restore.
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b = bytes.Trim(b, "\x00")
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nums := strings.Split(string(b), "\n")
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if position >= len(nums) {
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return 0, fmt.Errorf("position %v is not within the length of content %v", position, nums)
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}
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if position == -1 {
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// Expectation of newline at the end of last position.
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position = len(nums) - 2
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}
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num, err := strconv.Atoi(nums[position])
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if err != nil {
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return 0, fmt.Errorf("error getting number from file: %v", err)
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}
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return num, nil
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}
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// run starts the sandbox and waits for it to exit, checking that the
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// application succeeded.
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func run(spec *specs.Spec, conf *boot.Config) error {
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rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
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if err != nil {
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return fmt.Errorf("error setting up container: %v", err)
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}
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defer os.RemoveAll(rootDir)
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defer os.RemoveAll(bundleDir)
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// Create, start and wait for the container.
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ws, err := Run(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", "")
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if err != nil {
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return fmt.Errorf("running container: %v", err)
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}
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if !ws.Exited() || ws.ExitStatus() != 0 {
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return fmt.Errorf("container failed, waitStatus: %v", ws)
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}
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return nil
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}
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type configOption int
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const (
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overlay configOption = iota
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kvm
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nonExclusiveFS
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)
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var noOverlay = []configOption{kvm, nonExclusiveFS}
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var all = append(noOverlay, overlay)
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// configs generates different configurations to run tests.
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func configs(opts ...configOption) []*boot.Config {
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// Always load the default config.
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cs := []*boot.Config{testutil.TestConfig()}
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for _, o := range opts {
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c := testutil.TestConfig()
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switch o {
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case overlay:
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c.Overlay = true
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case kvm:
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// TODO: KVM tests are flaky. Disable until fixed.
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continue
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// TODO: KVM doesn't work with --race.
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if testutil.RaceEnabled {
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continue
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}
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c.Platform = boot.PlatformKVM
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case nonExclusiveFS:
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c.FileAccess = boot.FileAccessShared
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default:
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panic(fmt.Sprintf("unknown config option %v", o))
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}
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cs = append(cs, c)
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}
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return cs
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}
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// TestLifecycle tests the basic Create/Start/Signal/Destroy container lifecycle.
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// It verifies after each step that the container can be loaded from disk, and
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// has the correct status.
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func TestLifecycle(t *testing.T) {
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// Start the child reaper.
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childReaper := &testutil.Reaper{}
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childReaper.Start()
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defer childReaper.Stop()
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for _, conf := range configs(all...) {
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t.Logf("Running test with conf: %+v", conf)
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// The container will just sleep for a long time. We will kill it before
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// it finishes sleeping.
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spec := testutil.NewSpecWithArgs("sleep", "100")
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rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
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if err != nil {
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t.Fatalf("error setting up container: %v", err)
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}
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defer os.RemoveAll(rootDir)
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defer os.RemoveAll(bundleDir)
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// expectedPL lists the expected process state of the container.
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expectedPL := []*control.Process{
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{
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UID: 0,
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PID: 1,
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PPID: 0,
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C: 0,
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Cmd: "sleep",
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},
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}
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// Create the container.
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id := testutil.UniqueContainerID()
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c, err := Create(id, spec, conf, bundleDir, "", "", "")
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if err != nil {
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t.Fatalf("error creating container: %v", err)
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}
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defer c.Destroy()
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// Load the container from disk and check the status.
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c, err = Load(rootDir, id)
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if err != nil {
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t.Fatalf("error loading container: %v", err)
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}
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if got, want := c.Status, Created; got != want {
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t.Errorf("container status got %v, want %v", got, want)
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}
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// List should return the container id.
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ids, err := List(rootDir)
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if err != nil {
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t.Fatalf("error listing containers: %v", err)
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}
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if got, want := ids, []string{id}; !reflect.DeepEqual(got, want) {
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t.Errorf("container list got %v, want %v", got, want)
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}
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// Start the container.
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if err := c.Start(conf); err != nil {
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t.Fatalf("error starting container: %v", err)
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}
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// Load the container from disk and check the status.
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c, err = Load(rootDir, id)
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if err != nil {
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t.Fatalf("error loading container: %v", err)
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}
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if got, want := c.Status, Running; got != want {
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t.Errorf("container status got %v, want %v", got, want)
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}
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// Verify that "sleep 100" is running.
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if err := waitForProcessList(c, expectedPL); err != nil {
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t.Error(err)
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}
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// Wait on the container.
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var wg sync.WaitGroup
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wg.Add(1)
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ch := make(chan struct{})
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go func() {
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ch <- struct{}{}
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ws, err := c.Wait()
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if err != nil {
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t.Fatalf("error waiting on container: %v", err)
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}
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if got, want := ws.Signal(), syscall.SIGTERM; got != want {
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t.Fatalf("got signal %v, want %v", got, want)
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}
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wg.Done()
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}()
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// Wait a bit to ensure that we've started waiting on the
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// container before we signal.
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<-ch
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time.Sleep(100 * time.Millisecond)
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// Send the container a SIGTERM which will cause it to stop.
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if err := c.SignalContainer(syscall.SIGTERM, false); err != nil {
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t.Fatalf("error sending signal %v to container: %v", syscall.SIGTERM, err)
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}
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// Wait for it to die.
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wg.Wait()
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// Load the container from disk and check the status.
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c, err = Load(rootDir, id)
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if err != nil {
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t.Fatalf("error loading container: %v", err)
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}
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if got, want := c.Status, Stopped; got != want {
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t.Errorf("container status got %v, want %v", got, want)
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}
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// Destroy the container.
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if err := c.Destroy(); err != nil {
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t.Fatalf("error destroying container: %v", err)
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}
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// List should not return the container id.
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ids, err = List(rootDir)
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if err != nil {
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t.Fatalf("error listing containers: %v", err)
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}
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if len(ids) != 0 {
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t.Errorf("expected container list to be empty, but got %v", ids)
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}
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// Loading the container by id should fail.
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if _, err = Load(rootDir, id); err == nil {
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t.Errorf("expected loading destroyed container to fail, but it did not")
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}
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}
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}
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// Test the we can execute the application with different path formats.
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func TestExePath(t *testing.T) {
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for _, conf := range configs(overlay) {
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t.Logf("Running test with conf: %+v", conf)
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for _, test := range []struct {
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path string
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success bool
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}{
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{path: "true", success: true},
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{path: "bin/true", success: true},
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{path: "/bin/true", success: true},
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{path: "thisfiledoesntexit", success: false},
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{path: "bin/thisfiledoesntexit", success: false},
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{path: "/bin/thisfiledoesntexit", success: false},
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} {
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spec := testutil.NewSpecWithArgs(test.path)
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rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
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if err != nil {
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t.Fatalf("exec: %s, error setting up container: %v", test.path, err)
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}
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ws, err := Run(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", "")
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os.RemoveAll(rootDir)
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os.RemoveAll(bundleDir)
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if test.success {
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if err != nil {
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t.Errorf("exec: %s, error running container: %v", test.path, err)
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}
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if ws.ExitStatus() != 0 {
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t.Errorf("exec: %s, got exit status %v want %v", test.path, ws.ExitStatus(), 0)
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}
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} else {
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if err == nil {
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t.Errorf("exec: %s, got: no error, want: error", test.path)
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}
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}
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}
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}
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}
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// Test the we can retrieve the application exit status from the container.
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func TestAppExitStatus(t *testing.T) {
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// First container will succeed.
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succSpec := testutil.NewSpecWithArgs("true")
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conf := testutil.TestConfig()
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rootDir, bundleDir, err := testutil.SetupContainer(succSpec, conf)
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if err != nil {
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t.Fatalf("error setting up container: %v", err)
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}
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defer os.RemoveAll(rootDir)
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defer os.RemoveAll(bundleDir)
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ws, err := Run(testutil.UniqueContainerID(), succSpec, conf, bundleDir, "", "", "")
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if err != nil {
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t.Fatalf("error running container: %v", err)
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}
|
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if ws.ExitStatus() != 0 {
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t.Errorf("got exit status %v want %v", ws.ExitStatus(), 0)
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}
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|
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// Second container exits with non-zero status.
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wantStatus := 123
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errSpec := testutil.NewSpecWithArgs("bash", "-c", fmt.Sprintf("exit %d", wantStatus))
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rootDir2, bundleDir2, err := testutil.SetupContainer(errSpec, conf)
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if err != nil {
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t.Fatalf("error setting up container: %v", err)
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}
|
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defer os.RemoveAll(rootDir2)
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defer os.RemoveAll(bundleDir2)
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ws, err = Run(testutil.UniqueContainerID(), errSpec, conf, bundleDir2, "", "", "")
|
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if err != nil {
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t.Fatalf("error running container: %v", err)
|
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}
|
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if ws.ExitStatus() != wantStatus {
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t.Errorf("got exit status %v want %v", ws.ExitStatus(), wantStatus)
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}
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}
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|
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// TestExec verifies that a container can exec a new program.
|
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func TestExec(t *testing.T) {
|
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for _, conf := range configs(overlay) {
|
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t.Logf("Running test with conf: %+v", conf)
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|
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const uid = 343
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spec := testutil.NewSpecWithArgs("sleep", "100")
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rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
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if err != nil {
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t.Fatalf("error setting up container: %v", err)
|
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}
|
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defer os.RemoveAll(rootDir)
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defer os.RemoveAll(bundleDir)
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|
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// Create and start the container.
|
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cont, err := Create(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", "")
|
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if err != nil {
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t.Fatalf("error creating container: %v", err)
|
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}
|
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defer cont.Destroy()
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if err := cont.Start(conf); err != nil {
|
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t.Fatalf("error starting container: %v", err)
|
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}
|
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|
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// expectedPL lists the expected process state of the container.
|
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expectedPL := []*control.Process{
|
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{
|
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UID: 0,
|
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PID: 1,
|
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PPID: 0,
|
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C: 0,
|
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Cmd: "sleep",
|
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},
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{
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UID: uid,
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PID: 2,
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PPID: 0,
|
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C: 0,
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Cmd: "sleep",
|
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},
|
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}
|
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|
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// Verify that "sleep 100" is running.
|
|
if err := waitForProcessList(cont, expectedPL[:1]); err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
args := &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 (whick blocks).
|
|
status := make(chan error, 1)
|
|
go func() {
|
|
exitStatus, err := cont.executeSync(args)
|
|
if err != nil {
|
|
log.Debugf("error executing: %v", err)
|
|
status <- err
|
|
} else if exitStatus != 0 {
|
|
log.Debugf("bad status: %d", exitStatus)
|
|
status <- fmt.Errorf("failed with exit status: %v", exitStatus)
|
|
} else {
|
|
status <- nil
|
|
}
|
|
}()
|
|
|
|
if err := waitForProcessList(cont, expectedPL); err != nil {
|
|
t.Fatal(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 st := <-status:
|
|
if st != 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 _, conf := range configs(overlay) {
|
|
t.Logf("Running test with conf: %+v", conf)
|
|
|
|
app, err := testutil.FindFile("runsc/container/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")
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create and start the container.
|
|
cont, err := Create(testutil.UniqueContainerID(), 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)
|
|
}
|
|
|
|
// 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.Fatal(err)
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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 _, conf := range configs(noOverlay...) {
|
|
t.Logf("Running test with conf: %+v", conf)
|
|
|
|
dir, err := ioutil.TempDir(testutil.TmpDir(), "checkpoint-test")
|
|
if err != nil {
|
|
t.Fatalf("ioutil.TempDir failed: %v", err)
|
|
}
|
|
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)
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create and start the container.
|
|
cont, err := Create(testutil.UniqueContainerID(), 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)
|
|
}
|
|
|
|
// 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 := waitForFile(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.
|
|
cont2, err := Create(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", "")
|
|
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 := waitForFile(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.
|
|
cont3, err := Create(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", "")
|
|
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 := waitForFile(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 _, conf := range configs(noOverlay...) {
|
|
t.Logf("Running test with conf: %+v", conf)
|
|
|
|
// UDS path is limited to 108 chars for compatibility with older systems.
|
|
// Use '/tmp' (instead of testutil.TmpDir) to 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("runsc/container/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,
|
|
}}
|
|
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create and start the container.
|
|
cont, err := Create(testutil.UniqueContainerID(), 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)
|
|
}
|
|
|
|
// 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 := waitForFile(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.
|
|
contRestore, err := Create(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", "")
|
|
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 := waitForFile(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.
|
|
// It checks starts running sleep and executes another sleep. It pauses and checks
|
|
// that both processes are still running: sleep will be paused and still exist.
|
|
// It will then unpause and confirm that both processes are running. Then it will
|
|
// wait until one sleep completes and check to make sure the other is running.
|
|
func TestPauseResume(t *testing.T) {
|
|
for _, conf := range configs(noOverlay...) {
|
|
t.Logf("Running test with conf: %+v", conf)
|
|
const uid = 343
|
|
spec := testutil.NewSpecWithArgs("sleep", "20")
|
|
|
|
lock, err := ioutil.TempFile(testutil.TmpDir(), "lock")
|
|
if err != nil {
|
|
t.Fatalf("error creating output file: %v", err)
|
|
}
|
|
defer lock.Close()
|
|
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create and start the container.
|
|
cont, err := Create(testutil.UniqueContainerID(), 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)
|
|
}
|
|
|
|
// expectedPL lists the expected process state of the container.
|
|
expectedPL := []*control.Process{
|
|
{
|
|
UID: 0,
|
|
PID: 1,
|
|
PPID: 0,
|
|
C: 0,
|
|
Cmd: "sleep",
|
|
},
|
|
{
|
|
UID: uid,
|
|
PID: 2,
|
|
PPID: 0,
|
|
C: 0,
|
|
Cmd: "bash",
|
|
},
|
|
}
|
|
|
|
script := fmt.Sprintf("while [[ -f %q ]]; do sleep 0.1; done", lock.Name())
|
|
args := &control.ExecArgs{
|
|
Filename: "/bin/bash",
|
|
Argv: []string{"bash", "-c", script},
|
|
WorkingDirectory: "/",
|
|
KUID: uid,
|
|
}
|
|
|
|
// First, start running exec.
|
|
_, err = cont.Execute(args)
|
|
if err != nil {
|
|
t.Fatalf("error executing: %v", err)
|
|
}
|
|
|
|
// Verify that "sleep 5" is running.
|
|
if err := waitForProcessList(cont, expectedPL); err != nil {
|
|
t.Fatal(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(lock.Name()); err != nil {
|
|
t.Fatalf("os.Remove(lock) failed: %v", err)
|
|
}
|
|
// Script loops and sleeps for 100ms. Give a bit a time for it to exit in
|
|
// case pause didn't work.
|
|
time.Sleep(200 * time.Millisecond)
|
|
|
|
// Verify that the two processes still exist.
|
|
if err := getAndCheckProcLists(cont, expectedPL); err != nil {
|
|
t.Fatal(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)
|
|
}
|
|
|
|
expectedPL2 := []*control.Process{
|
|
{
|
|
UID: 0,
|
|
PID: 1,
|
|
PPID: 0,
|
|
C: 0,
|
|
Cmd: "sleep",
|
|
},
|
|
}
|
|
|
|
// Verify that deleting the file triggered the process to exit.
|
|
if err := waitForProcessList(cont, expectedPL2); err != nil {
|
|
t.Fatal(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()
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create and start the container.
|
|
cont, err := Create(testutil.UniqueContainerID(), 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)
|
|
}
|
|
|
|
// 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 _, conf := range configs(all...) {
|
|
t.Logf("Running test with conf: %+v", conf)
|
|
|
|
spec := testutil.NewSpecWithArgs("sleep", "100")
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create and start the container.
|
|
cont, err := Create(testutil.UniqueContainerID(), 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)
|
|
}
|
|
|
|
// expectedPL lists the expected process state of the container.
|
|
expectedPL := []*control.Process{
|
|
{
|
|
UID: 0,
|
|
PID: 1,
|
|
PPID: 0,
|
|
C: 0,
|
|
Cmd: "sleep",
|
|
},
|
|
{
|
|
UID: uid,
|
|
PID: 2,
|
|
PPID: 0,
|
|
C: 0,
|
|
Cmd: "exe",
|
|
},
|
|
}
|
|
if err := waitForProcessList(cont, expectedPL[:1]); 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)
|
|
|
|
args := &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(args); err == nil {
|
|
t.Fatalf("container executed without error, but an error was expected")
|
|
}
|
|
|
|
// Now we run with the capability enabled and should succeed.
|
|
args.Capabilities = &auth.TaskCapabilities{
|
|
EffectiveCaps: auth.CapabilitySetOf(linux.CAP_DAC_OVERRIDE),
|
|
}
|
|
// "exe" should not fail this time.
|
|
if _, err := cont.executeSync(args); 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 _, conf := range configs(noOverlay...) {
|
|
t.Logf("Running test with conf: %+v", conf)
|
|
|
|
spec := testutil.NewSpecWithArgs("/bin/true")
|
|
spec.Process.User.UID = 343
|
|
spec.Process.User.GID = 2401
|
|
|
|
// User that container runs as 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)
|
|
}
|
|
|
|
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 _, conf := range configs(overlay) {
|
|
t.Logf("Running test with conf: %+v", conf)
|
|
|
|
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",
|
|
})
|
|
|
|
if err := run(spec, conf); err != nil {
|
|
t.Fatalf("error running sandbox: %v", err)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestReadonlyRoot(t *testing.T) {
|
|
for _, conf := range configs(overlay) {
|
|
t.Logf("Running test with conf: %+v", conf)
|
|
|
|
spec := testutil.NewSpecWithArgs("/bin/touch", "/foo")
|
|
spec.Root.Readonly = true
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create, start and wait for the container.
|
|
c, err := Create(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", "")
|
|
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() || syscall.Errno(ws.ExitStatus()) != syscall.EPERM {
|
|
t.Fatalf("container failed, waitStatus: %v", ws)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestReadonlyMount(t *testing.T) {
|
|
for _, conf := range configs(overlay) {
|
|
t.Logf("Running test with conf: %+v", conf)
|
|
|
|
dir, err := ioutil.TempDir(testutil.TmpDir(), "ro-mount")
|
|
spec := testutil.NewSpecWithArgs("/bin/touch", path.Join(dir, "file"))
|
|
if err != nil {
|
|
t.Fatalf("ioutil.TempDir() failed: %v", err)
|
|
}
|
|
spec.Mounts = append(spec.Mounts, specs.Mount{
|
|
Destination: dir,
|
|
Source: dir,
|
|
Type: "bind",
|
|
Options: []string{"ro"},
|
|
})
|
|
spec.Root.Readonly = false
|
|
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create, start and wait for the container.
|
|
c, err := Create(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", "")
|
|
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() || syscall.Errno(ws.ExitStatus()) != syscall.EPERM {
|
|
t.Fatalf("container failed, waitStatus: %v", ws)
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestAbbreviatedIDs checks that runsc supports using abbreviated container
|
|
// IDs in place of full IDs.
|
|
func TestAbbreviatedIDs(t *testing.T) {
|
|
rootDir, err := testutil.SetupRootDir()
|
|
if err != nil {
|
|
t.Fatalf("error creating root dir: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
|
|
conf := testutil.TestConfigWithRoot(rootDir)
|
|
|
|
cids := []string{
|
|
"foo-" + testutil.UniqueContainerID(),
|
|
"bar-" + testutil.UniqueContainerID(),
|
|
"baz-" + testutil.UniqueContainerID(),
|
|
}
|
|
for _, cid := range cids {
|
|
spec := testutil.NewSpecWithArgs("sleep", "100")
|
|
bundleDir, err := testutil.SetupBundleDir(spec)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create and start the container.
|
|
cont, err := Create(cid, spec, conf, bundleDir, "", "", "")
|
|
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) {
|
|
spec := testutil.NewSpecWithArgs("/bin/sleep", "10000")
|
|
conf := testutil.TestConfig()
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create and start the container.
|
|
c, err := Create(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", "")
|
|
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) {
|
|
if testutil.RaceEnabled {
|
|
// Requires statically linked binary, since it's mapping the root to a
|
|
// random dir, libs cannot be located.
|
|
t.Skip("race makes test_app not statically linked")
|
|
}
|
|
|
|
appSym, err := testutil.FindFile("runsc/container/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)
|
|
|
|
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()
|
|
if err := run(spec, conf); err != nil {
|
|
t.Fatalf("error running sandbox: %v", err)
|
|
}
|
|
}
|
|
|
|
func TestUserLog(t *testing.T) {
|
|
app, err := testutil.FindFile("runsc/container/test_app")
|
|
if err != nil {
|
|
t.Fatal("error finding test_app:", err)
|
|
}
|
|
|
|
// sched_rr_get_interval = 148 - not implemented in gvisor.
|
|
spec := testutil.NewSpecWithArgs(app, "syscall", "--syscall=148")
|
|
conf := testutil.TestConfig()
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
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.
|
|
ws, err := Run(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", userLog)
|
|
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 _, conf := range configs(all...) {
|
|
t.Logf("Running test with conf: %+v", conf)
|
|
|
|
// 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)
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create and Start the container.
|
|
c, err := Create(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", "")
|
|
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) {
|
|
spec := testutil.NewSpecWithArgs("/bin/sleep", "100")
|
|
conf := testutil.TestConfig()
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create the container and check that it can be destroyed.
|
|
c, err := Create(testutil.UniqueContainerID(), spec, conf, bundleDir, "", "", "")
|
|
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) {
|
|
for i := 0; i < 10; i++ {
|
|
spec := testutil.NewSpecWithArgs("/bin/sleep", "100")
|
|
conf := testutil.TestConfig()
|
|
rootDir, bundleDir, err := testutil.SetupContainer(spec, conf)
|
|
if err != nil {
|
|
t.Fatalf("error setting up container: %v", err)
|
|
}
|
|
defer os.RemoveAll(rootDir)
|
|
defer os.RemoveAll(bundleDir)
|
|
|
|
// Create the container and check that it can be destroyed.
|
|
id := testutil.UniqueContainerID()
|
|
c, err := Create(id, spec, conf, bundleDir, "", "", "")
|
|
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, 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 _, conf := range configs(overlay) {
|
|
t.Logf("Running test with conf: %+v", conf)
|
|
|
|
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)
|
|
}
|
|
}
|
|
}
|
|
|
|
// 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, true /* clearStatus */)
|
|
if err != nil {
|
|
return 0, fmt.Errorf("error waiting: %v", err)
|
|
}
|
|
return ws, nil
|
|
}
|
|
|
|
func TestMain(m *testing.M) {
|
|
log.SetLevel(log.Debug)
|
|
if err := testutil.ConfigureExePath(); err != nil {
|
|
panic(err.Error())
|
|
}
|
|
testutil.RunAsRoot()
|
|
|
|
os.Exit(m.Run())
|
|
}
|