mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
362369b4bb
Allow built images to be squash to scratch. Squashing does not destroy any images or layers, and preserves the build cache. Introduce a new CLI argument --squash to docker build Introduce a new param to the build API endpoint `squash` Once the build is complete, docker creates a new image loading the diffs from each layer into a single new layer and references all the parent's layers. Signed-off-by: Brian Goff <cpuguy83@gmail.com>
801 lines
15 KiB
Go
801 lines
15 KiB
Go
// +build linux
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package aufs
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import (
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"crypto/sha256"
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"encoding/hex"
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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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"sync"
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"testing"
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"github.com/docker/docker/daemon/graphdriver"
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"github.com/docker/docker/pkg/archive"
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"github.com/docker/docker/pkg/reexec"
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"github.com/docker/docker/pkg/stringid"
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)
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var (
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tmpOuter = path.Join(os.TempDir(), "aufs-tests")
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tmp = path.Join(tmpOuter, "aufs")
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)
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func init() {
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reexec.Init()
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}
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func testInit(dir string, t testing.TB) graphdriver.Driver {
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d, err := Init(dir, nil, nil, nil)
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if err != nil {
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if err == graphdriver.ErrNotSupported {
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t.Skip(err)
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} else {
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t.Fatal(err)
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}
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}
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return d
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}
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func newDriver(t testing.TB) *Driver {
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if err := os.MkdirAll(tmp, 0755); err != nil {
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t.Fatal(err)
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}
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d := testInit(tmp, t)
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return d.(*Driver)
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}
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func TestNewDriver(t *testing.T) {
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if err := os.MkdirAll(tmp, 0755); err != nil {
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t.Fatal(err)
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}
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d := testInit(tmp, t)
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defer os.RemoveAll(tmp)
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if d == nil {
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t.Fatalf("Driver should not be nil")
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}
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}
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func TestAufsString(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if d.String() != "aufs" {
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t.Fatalf("Expected aufs got %s", d.String())
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}
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}
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func TestCreateDirStructure(t *testing.T) {
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newDriver(t)
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defer os.RemoveAll(tmp)
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paths := []string{
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"mnt",
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"layers",
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"diff",
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}
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for _, p := range paths {
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if _, err := os.Stat(path.Join(tmp, p)); err != nil {
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t.Fatal(err)
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}
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}
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}
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// We should be able to create two drivers with the same dir structure
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func TestNewDriverFromExistingDir(t *testing.T) {
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if err := os.MkdirAll(tmp, 0755); err != nil {
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t.Fatal(err)
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}
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testInit(tmp, t)
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testInit(tmp, t)
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os.RemoveAll(tmp)
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}
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func TestCreateNewDir(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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}
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func TestCreateNewDirStructure(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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paths := []string{
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"mnt",
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"diff",
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"layers",
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}
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for _, p := range paths {
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if _, err := os.Stat(path.Join(tmp, p, "1")); err != nil {
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t.Fatal(err)
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}
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}
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}
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func TestRemoveImage(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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if err := d.Remove("1"); err != nil {
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t.Fatal(err)
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}
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paths := []string{
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"mnt",
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"diff",
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"layers",
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}
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for _, p := range paths {
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if _, err := os.Stat(path.Join(tmp, p, "1")); err == nil {
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t.Fatalf("Error should not be nil because dirs with id 1 should be delted: %s", p)
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}
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}
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}
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func TestGetWithoutParent(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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diffPath, err := d.Get("1", "")
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if err != nil {
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t.Fatal(err)
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}
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expected := path.Join(tmp, "diff", "1")
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if diffPath != expected {
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t.Fatalf("Expected path %s got %s", expected, diffPath)
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}
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}
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func TestCleanupWithNoDirs(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.Cleanup(); err != nil {
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t.Fatal(err)
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}
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}
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func TestCleanupWithDir(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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if err := d.Cleanup(); err != nil {
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t.Fatal(err)
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}
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}
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func TestMountedFalseResponse(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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response, err := d.mounted(d.getDiffPath("1"))
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if err != nil {
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t.Fatal(err)
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}
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if response != false {
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t.Fatalf("Response if dir id 1 is mounted should be false")
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}
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}
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func TestMountedTrueReponse(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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defer d.Cleanup()
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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if err := d.Create("2", "1", "", nil); err != nil {
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t.Fatal(err)
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}
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_, err := d.Get("2", "")
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if err != nil {
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t.Fatal(err)
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}
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response, err := d.mounted(d.pathCache["2"])
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if err != nil {
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t.Fatal(err)
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}
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if response != true {
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t.Fatalf("Response if dir id 2 is mounted should be true")
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}
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}
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func TestMountWithParent(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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if err := d.Create("2", "1", "", nil); err != nil {
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t.Fatal(err)
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}
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defer func() {
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if err := d.Cleanup(); err != nil {
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t.Fatal(err)
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}
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}()
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mntPath, err := d.Get("2", "")
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if err != nil {
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t.Fatal(err)
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}
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if mntPath == "" {
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t.Fatal("mntPath should not be empty string")
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}
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expected := path.Join(tmp, "mnt", "2")
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if mntPath != expected {
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t.Fatalf("Expected %s got %s", expected, mntPath)
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}
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}
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func TestRemoveMountedDir(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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if err := d.Create("2", "1", "", nil); err != nil {
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t.Fatal(err)
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}
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defer func() {
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if err := d.Cleanup(); err != nil {
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t.Fatal(err)
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}
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}()
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mntPath, err := d.Get("2", "")
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if err != nil {
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t.Fatal(err)
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}
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if mntPath == "" {
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t.Fatal("mntPath should not be empty string")
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}
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mounted, err := d.mounted(d.pathCache["2"])
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if err != nil {
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t.Fatal(err)
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}
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if !mounted {
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t.Fatalf("Dir id 2 should be mounted")
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}
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if err := d.Remove("2"); err != nil {
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t.Fatal(err)
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}
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}
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func TestCreateWithInvalidParent(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.Create("1", "docker", "", nil); err == nil {
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t.Fatalf("Error should not be nil with parent does not exist")
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}
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}
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func TestGetDiff(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.CreateReadWrite("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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diffPath, err := d.Get("1", "")
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if err != nil {
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t.Fatal(err)
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}
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// Add a file to the diff path with a fixed size
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size := int64(1024)
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f, err := os.Create(path.Join(diffPath, "test_file"))
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if err != nil {
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t.Fatal(err)
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}
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if err := f.Truncate(size); err != nil {
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t.Fatal(err)
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}
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f.Close()
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a, err := d.Diff("1", "")
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if err != nil {
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t.Fatal(err)
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}
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if a == nil {
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t.Fatalf("Archive should not be nil")
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}
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}
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func TestChanges(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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if err := d.CreateReadWrite("2", "1", "", nil); err != nil {
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t.Fatal(err)
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}
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defer func() {
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if err := d.Cleanup(); err != nil {
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t.Fatal(err)
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}
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}()
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mntPoint, err := d.Get("2", "")
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if err != nil {
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t.Fatal(err)
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}
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// Create a file to save in the mountpoint
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f, err := os.Create(path.Join(mntPoint, "test.txt"))
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if err != nil {
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t.Fatal(err)
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}
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if _, err := f.WriteString("testline"); err != nil {
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t.Fatal(err)
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}
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if err := f.Close(); err != nil {
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t.Fatal(err)
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}
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changes, err := d.Changes("2", "")
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if err != nil {
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t.Fatal(err)
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}
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if len(changes) != 1 {
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t.Fatalf("Dir 2 should have one change from parent got %d", len(changes))
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}
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change := changes[0]
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expectedPath := "/test.txt"
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if change.Path != expectedPath {
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t.Fatalf("Expected path %s got %s", expectedPath, change.Path)
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}
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if change.Kind != archive.ChangeAdd {
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t.Fatalf("Change kind should be ChangeAdd got %s", change.Kind)
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}
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if err := d.CreateReadWrite("3", "2", "", nil); err != nil {
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t.Fatal(err)
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}
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mntPoint, err = d.Get("3", "")
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if err != nil {
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t.Fatal(err)
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}
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// Create a file to save in the mountpoint
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f, err = os.Create(path.Join(mntPoint, "test2.txt"))
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if err != nil {
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t.Fatal(err)
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}
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if _, err := f.WriteString("testline"); err != nil {
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t.Fatal(err)
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}
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if err := f.Close(); err != nil {
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t.Fatal(err)
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}
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changes, err = d.Changes("3", "2")
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if err != nil {
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t.Fatal(err)
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}
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if len(changes) != 1 {
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t.Fatalf("Dir 2 should have one change from parent got %d", len(changes))
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}
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change = changes[0]
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expectedPath = "/test2.txt"
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if change.Path != expectedPath {
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t.Fatalf("Expected path %s got %s", expectedPath, change.Path)
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}
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if change.Kind != archive.ChangeAdd {
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t.Fatalf("Change kind should be ChangeAdd got %s", change.Kind)
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}
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}
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func TestDiffSize(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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if err := d.CreateReadWrite("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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diffPath, err := d.Get("1", "")
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if err != nil {
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t.Fatal(err)
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}
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// Add a file to the diff path with a fixed size
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size := int64(1024)
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f, err := os.Create(path.Join(diffPath, "test_file"))
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if err != nil {
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t.Fatal(err)
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}
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if err := f.Truncate(size); err != nil {
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t.Fatal(err)
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}
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s, err := f.Stat()
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if err != nil {
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t.Fatal(err)
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}
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size = s.Size()
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if err := f.Close(); err != nil {
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t.Fatal(err)
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}
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diffSize, err := d.DiffSize("1", "")
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if err != nil {
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t.Fatal(err)
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}
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if diffSize != size {
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t.Fatalf("Expected size to be %d got %d", size, diffSize)
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}
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}
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func TestChildDiffSize(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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defer d.Cleanup()
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if err := d.CreateReadWrite("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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diffPath, err := d.Get("1", "")
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if err != nil {
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t.Fatal(err)
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}
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// Add a file to the diff path with a fixed size
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size := int64(1024)
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f, err := os.Create(path.Join(diffPath, "test_file"))
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if err != nil {
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t.Fatal(err)
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}
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if err := f.Truncate(size); err != nil {
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t.Fatal(err)
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}
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s, err := f.Stat()
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if err != nil {
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t.Fatal(err)
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}
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size = s.Size()
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if err := f.Close(); err != nil {
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t.Fatal(err)
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}
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diffSize, err := d.DiffSize("1", "")
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if err != nil {
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t.Fatal(err)
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}
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if diffSize != size {
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t.Fatalf("Expected size to be %d got %d", size, diffSize)
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}
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if err := d.Create("2", "1", "", nil); err != nil {
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t.Fatal(err)
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}
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diffSize, err = d.DiffSize("2", "1")
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if err != nil {
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t.Fatal(err)
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}
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// The diff size for the child should be zero
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if diffSize != 0 {
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t.Fatalf("Expected size to be %d got %d", 0, diffSize)
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}
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}
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func TestExists(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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defer d.Cleanup()
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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if d.Exists("none") {
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t.Fatal("id none should not exist in the driver")
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}
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if !d.Exists("1") {
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t.Fatal("id 1 should exist in the driver")
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}
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}
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func TestStatus(t *testing.T) {
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d := newDriver(t)
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defer os.RemoveAll(tmp)
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defer d.Cleanup()
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if err := d.Create("1", "", "", nil); err != nil {
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t.Fatal(err)
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}
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status := d.Status()
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if status == nil || len(status) == 0 {
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t.Fatal("Status should not be nil or empty")
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}
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rootDir := status[0]
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dirs := status[2]
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if rootDir[0] != "Root Dir" {
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t.Fatalf("Expected Root Dir got %s", rootDir[0])
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}
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if rootDir[1] != d.rootPath() {
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t.Fatalf("Expected %s got %s", d.rootPath(), rootDir[1])
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}
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if dirs[0] != "Dirs" {
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t.Fatalf("Expected Dirs got %s", dirs[0])
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}
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if dirs[1] != "1" {
|
|
t.Fatalf("Expected 1 got %s", dirs[1])
|
|
}
|
|
}
|
|
|
|
func TestApplyDiff(t *testing.T) {
|
|
d := newDriver(t)
|
|
defer os.RemoveAll(tmp)
|
|
defer d.Cleanup()
|
|
|
|
if err := d.CreateReadWrite("1", "", "", nil); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
diffPath, err := d.Get("1", "")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Add a file to the diff path with a fixed size
|
|
size := int64(1024)
|
|
|
|
f, err := os.Create(path.Join(diffPath, "test_file"))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := f.Truncate(size); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
f.Close()
|
|
|
|
diff, err := d.Diff("1", "")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if err := d.Create("2", "", "", nil); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if err := d.Create("3", "2", "", nil); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
if err := d.applyDiff("3", diff); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
// Ensure that the file is in the mount point for id 3
|
|
|
|
mountPoint, err := d.Get("3", "")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if _, err := os.Stat(path.Join(mountPoint, "test_file")); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
}
|
|
|
|
func hash(c string) string {
|
|
h := sha256.New()
|
|
fmt.Fprint(h, c)
|
|
return hex.EncodeToString(h.Sum(nil))
|
|
}
|
|
|
|
func testMountMoreThan42Layers(t *testing.T, mountPath string) {
|
|
if err := os.MkdirAll(mountPath, 0755); err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
defer os.RemoveAll(mountPath)
|
|
d := testInit(mountPath, t).(*Driver)
|
|
defer d.Cleanup()
|
|
var last string
|
|
var expected int
|
|
|
|
for i := 1; i < 127; i++ {
|
|
expected++
|
|
var (
|
|
parent = fmt.Sprintf("%d", i-1)
|
|
current = fmt.Sprintf("%d", i)
|
|
)
|
|
|
|
if parent == "0" {
|
|
parent = ""
|
|
} else {
|
|
parent = hash(parent)
|
|
}
|
|
current = hash(current)
|
|
|
|
if err := d.CreateReadWrite(current, parent, "", nil); err != nil {
|
|
t.Logf("Current layer %d", i)
|
|
t.Error(err)
|
|
}
|
|
point, err := d.Get(current, "")
|
|
if err != nil {
|
|
t.Logf("Current layer %d", i)
|
|
t.Error(err)
|
|
}
|
|
f, err := os.Create(path.Join(point, current))
|
|
if err != nil {
|
|
t.Logf("Current layer %d", i)
|
|
t.Error(err)
|
|
}
|
|
f.Close()
|
|
|
|
if i%10 == 0 {
|
|
if err := os.Remove(path.Join(point, parent)); err != nil {
|
|
t.Logf("Current layer %d", i)
|
|
t.Error(err)
|
|
}
|
|
expected--
|
|
}
|
|
last = current
|
|
}
|
|
|
|
// Perform the actual mount for the top most image
|
|
point, err := d.Get(last, "")
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
files, err := ioutil.ReadDir(point)
|
|
if err != nil {
|
|
t.Error(err)
|
|
}
|
|
if len(files) != expected {
|
|
t.Errorf("Expected %d got %d", expected, len(files))
|
|
}
|
|
}
|
|
|
|
func TestMountMoreThan42Layers(t *testing.T) {
|
|
os.RemoveAll(tmpOuter)
|
|
testMountMoreThan42Layers(t, tmp)
|
|
}
|
|
|
|
func TestMountMoreThan42LayersMatchingPathLength(t *testing.T) {
|
|
defer os.RemoveAll(tmpOuter)
|
|
zeroes := "0"
|
|
for {
|
|
// This finds a mount path so that when combined into aufs mount options
|
|
// 4096 byte boundary would be in between the paths or in permission
|
|
// section. For '/tmp' it will use '/tmp/aufs-tests/00000000/aufs'
|
|
mountPath := path.Join(tmpOuter, zeroes, "aufs")
|
|
pathLength := 77 + len(mountPath)
|
|
|
|
if mod := 4095 % pathLength; mod == 0 || mod > pathLength-2 {
|
|
t.Logf("Using path: %s", mountPath)
|
|
testMountMoreThan42Layers(t, mountPath)
|
|
return
|
|
}
|
|
zeroes += "0"
|
|
}
|
|
}
|
|
|
|
func BenchmarkConcurrentAccess(b *testing.B) {
|
|
b.StopTimer()
|
|
b.ResetTimer()
|
|
|
|
d := newDriver(b)
|
|
defer os.RemoveAll(tmp)
|
|
defer d.Cleanup()
|
|
|
|
numConcurent := 256
|
|
// create a bunch of ids
|
|
var ids []string
|
|
for i := 0; i < numConcurent; i++ {
|
|
ids = append(ids, stringid.GenerateNonCryptoID())
|
|
}
|
|
|
|
if err := d.Create(ids[0], "", "", nil); err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
|
|
if err := d.Create(ids[1], ids[0], "", nil); err != nil {
|
|
b.Fatal(err)
|
|
}
|
|
|
|
parent := ids[1]
|
|
ids = append(ids[2:])
|
|
|
|
chErr := make(chan error, numConcurent)
|
|
var outerGroup sync.WaitGroup
|
|
outerGroup.Add(len(ids))
|
|
b.StartTimer()
|
|
|
|
// here's the actual bench
|
|
for _, id := range ids {
|
|
go func(id string) {
|
|
defer outerGroup.Done()
|
|
if err := d.Create(id, parent, "", nil); err != nil {
|
|
b.Logf("Create %s failed", id)
|
|
chErr <- err
|
|
return
|
|
}
|
|
var innerGroup sync.WaitGroup
|
|
for i := 0; i < b.N; i++ {
|
|
innerGroup.Add(1)
|
|
go func() {
|
|
d.Get(id, "")
|
|
d.Put(id)
|
|
innerGroup.Done()
|
|
}()
|
|
}
|
|
innerGroup.Wait()
|
|
d.Remove(id)
|
|
}(id)
|
|
}
|
|
|
|
outerGroup.Wait()
|
|
b.StopTimer()
|
|
close(chErr)
|
|
for err := range chErr {
|
|
if err != nil {
|
|
b.Log(err)
|
|
b.Fail()
|
|
}
|
|
}
|
|
}
|