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120 lines
4 KiB
Go
120 lines
4 KiB
Go
// +build !windows
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package image // import "github.com/docker/docker/integration/image"
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import (
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"context"
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"io"
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"io/ioutil"
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"os"
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"path/filepath"
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"runtime"
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"strconv"
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"strings"
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"syscall"
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"testing"
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"unsafe"
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"github.com/docker/docker/api/types"
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_ "github.com/docker/docker/daemon/graphdriver/register" // register graph drivers
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"github.com/docker/docker/daemon/images"
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"github.com/docker/docker/layer"
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"github.com/docker/docker/pkg/idtools"
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"github.com/docker/docker/testutil/daemon"
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"github.com/docker/docker/testutil/fakecontext"
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"gotest.tools/v3/assert"
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"gotest.tools/v3/skip"
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)
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// This is a regression test for #38488
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// It ensures that orphan layers can be found and cleaned up
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// after unsuccessful image removal
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func TestRemoveImageGarbageCollector(t *testing.T) {
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// This test uses very platform specific way to prevent
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// daemon for remove image layer.
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skip.If(t, testEnv.DaemonInfo.OSType != "linux")
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skip.If(t, os.Getenv("DOCKER_ENGINE_GOARCH") != "amd64")
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skip.If(t, testEnv.IsRootless, "rootless mode doesn't support overlay2 on most distros")
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// Create daemon with overlay2 graphdriver because vfs uses disk differently
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// and this test case would not work with it.
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d := daemon.New(t, daemon.WithStorageDriver("overlay2"))
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d.Start(t)
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defer d.Stop(t)
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ctx := context.Background()
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client := d.NewClientT(t)
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layerStores := make(map[string]layer.Store)
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layerStores[runtime.GOOS], _ = layer.NewStoreFromOptions(layer.StoreOptions{
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Root: d.Root,
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MetadataStorePathTemplate: filepath.Join(d.RootDir(), "image", "%s", "layerdb"),
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GraphDriver: d.StorageDriver(),
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GraphDriverOptions: nil,
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IDMapping: &idtools.IdentityMapping{},
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PluginGetter: nil,
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ExperimentalEnabled: false,
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OS: runtime.GOOS,
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})
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i := images.NewImageService(images.ImageServiceConfig{
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LayerStores: layerStores,
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})
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img := "test-garbage-collector"
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// Build a image with multiple layers
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dockerfile := `FROM busybox
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RUN echo echo Running... > /run.sh`
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source := fakecontext.New(t, "", fakecontext.WithDockerfile(dockerfile))
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defer source.Close()
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resp, err := client.ImageBuild(ctx,
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source.AsTarReader(t),
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types.ImageBuildOptions{
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Remove: true,
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ForceRemove: true,
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Tags: []string{img},
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})
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assert.NilError(t, err)
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_, err = io.Copy(ioutil.Discard, resp.Body)
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resp.Body.Close()
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assert.NilError(t, err)
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image, _, err := client.ImageInspectWithRaw(ctx, img)
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assert.NilError(t, err)
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// Mark latest image layer to immutable
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data := image.GraphDriver.Data
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file, _ := os.Open(data["UpperDir"])
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attr := 0x00000010
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fsflags := uintptr(0x40086602)
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argp := uintptr(unsafe.Pointer(&attr))
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_, _, errno := syscall.Syscall(syscall.SYS_IOCTL, file.Fd(), fsflags, argp)
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assert.Equal(t, "errno 0", errno.Error())
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// Try to remove the image, it should generate error
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// but marking layer back to mutable before checking errors (so we don't break CI server)
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_, err = client.ImageRemove(ctx, img, types.ImageRemoveOptions{})
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attr = 0x00000000
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argp = uintptr(unsafe.Pointer(&attr))
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_, _, errno = syscall.Syscall(syscall.SYS_IOCTL, file.Fd(), fsflags, argp)
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assert.Equal(t, "errno 0", errno.Error())
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assert.Assert(t, err != nil)
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errStr := err.Error()
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if !(strings.Contains(errStr, "permission denied") || strings.Contains(errStr, "operation not permitted")) {
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t.Errorf("ImageRemove error not an permission error %s", errStr)
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}
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// Verify that layer remaining on disk
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dir, _ := os.Stat(data["UpperDir"])
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assert.Equal(t, "true", strconv.FormatBool(dir.IsDir()))
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// Run imageService.Cleanup() and make sure that layer was removed from disk
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i.Cleanup()
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_, err = os.Stat(data["UpperDir"])
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assert.Assert(t, os.IsNotExist(err))
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// Make sure that removal pending layers does not exist on layerdb either
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layerdbItems, _ := ioutil.ReadDir(filepath.Join(d.RootDir(), "/image/overlay2/layerdb/sha256"))
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for _, folder := range layerdbItems {
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assert.Equal(t, false, strings.HasSuffix(folder.Name(), "-removing"))
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}
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}
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