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-rw-r--r--libpod/adapter/runtime.go12
-rw-r--r--libpod/adapter/runtime_remote.go95
-rw-r--r--libpod/image/image.go67
-rw-r--r--libpod/image/utils.go26
4 files changed, 183 insertions, 17 deletions
diff --git a/libpod/adapter/runtime.go b/libpod/adapter/runtime.go
index 02ef9af07..b12f63cdc 100644
--- a/libpod/adapter/runtime.go
+++ b/libpod/adapter/runtime.go
@@ -310,3 +310,15 @@ func (r *LocalRuntime) Build(ctx context.Context, c *cliconfig.BuildValues, opti
func (r *LocalRuntime) PruneVolumes(ctx context.Context) ([]string, []error) {
return r.Runtime.PruneVolumes(ctx)
}
+
+// SaveImage is a wrapper function for saving an image to the local filesystem
+func (r *LocalRuntime) SaveImage(ctx context.Context, c *cliconfig.SaveValues) error {
+ source := c.InputArgs[0]
+ additionalTags := c.InputArgs[1:]
+
+ newImage, err := r.Runtime.ImageRuntime().NewFromLocal(source)
+ if err != nil {
+ return err
+ }
+ return newImage.Save(ctx, source, c.Format, c.Output, additionalTags, c.Quiet, c.Compress)
+}
diff --git a/libpod/adapter/runtime_remote.go b/libpod/adapter/runtime_remote.go
index b1d4d4d25..a79f93079 100644
--- a/libpod/adapter/runtime_remote.go
+++ b/libpod/adapter/runtime_remote.go
@@ -20,6 +20,7 @@ import (
"github.com/containers/libpod/cmd/podman/varlink"
"github.com/containers/libpod/libpod"
"github.com/containers/libpod/libpod/image"
+ "github.com/containers/libpod/utils"
"github.com/containers/storage/pkg/archive"
"github.com/opencontainers/go-digest"
"github.com/pkg/errors"
@@ -385,8 +386,11 @@ func (r *LocalRuntime) Export(name string, path string) error {
if err != nil {
return err
}
+ return r.GetFileFromRemoteHost(tempPath, path, true)
+}
- outputFile, err := os.Create(path)
+func (r *LocalRuntime) GetFileFromRemoteHost(remoteFilePath, outputPath string, delete bool) error {
+ outputFile, err := os.Create(outputPath)
if err != nil {
return err
}
@@ -395,7 +399,7 @@ func (r *LocalRuntime) Export(name string, path string) error {
writer := bufio.NewWriter(outputFile)
defer writer.Flush()
- reply, err := iopodman.ReceiveFile().Send(r.Conn, varlink.Upgrade, tempPath, true)
+ reply, err := iopodman.ReceiveFile().Send(r.Conn, varlink.Upgrade, remoteFilePath, delete)
if err != nil {
return err
}
@@ -409,7 +413,6 @@ func (r *LocalRuntime) Export(name string, path string) error {
if _, err := io.CopyN(writer, reader, length); err != nil {
return errors.Wrap(err, "file transer failed")
}
-
return nil
}
@@ -467,28 +470,17 @@ func (r *LocalRuntime) Build(ctx context.Context, c *cliconfig.BuildValues, opti
Squash: options.Squash,
}
// tar the file
- logrus.Debugf("creating tarball of context dir %s", options.ContextDirectory)
- input, err := archive.Tar(options.ContextDirectory, archive.Uncompressed)
- if err != nil {
- return errors.Wrapf(err, "unable to create tarball of context dir %s", options.ContextDirectory)
- }
-
- // Write the tarball to the fs
- // TODO we might considering sending this without writing to the fs for the sake of performance
- // under given conditions like memory availability.
outputFile, err := ioutil.TempFile("", "varlink_tar_send")
if err != nil {
return err
}
defer outputFile.Close()
- logrus.Debugf("writing context dir tarball to %s", outputFile.Name())
+ defer os.Remove(outputFile.Name())
- _, err = io.Copy(outputFile, input)
- if err != nil {
+ // Create the tarball of the context dir to a tempfile
+ if err := utils.TarToFilesystem(options.ContextDirectory, outputFile); err != nil {
return err
}
-
- logrus.Debugf("completed writing context dir tarball %s", outputFile.Name())
// Send the context dir tarball over varlink.
tempFile, err := r.SendFileOverVarlink(outputFile.Name())
if err != nil {
@@ -702,3 +694,72 @@ func (r *LocalRuntime) PruneVolumes(ctx context.Context) ([]string, []error) {
}
return prunedNames, errs
}
+
+// SaveImage is a wrapper function for saving an image to the local filesystem
+func (r *LocalRuntime) SaveImage(ctx context.Context, c *cliconfig.SaveValues) error {
+ source := c.InputArgs[0]
+ additionalTags := c.InputArgs[1:]
+
+ options := iopodman.ImageSaveOptions{
+ Name: source,
+ Format: c.Format,
+ Output: c.Output,
+ MoreTags: additionalTags,
+ Quiet: c.Quiet,
+ Compress: c.Compress,
+ }
+ reply, err := iopodman.ImageSave().Send(r.Conn, varlink.More, options)
+ if err != nil {
+ return err
+ }
+
+ var fetchfile string
+ for {
+ responses, flags, err := reply()
+ if err != nil {
+ return err
+ }
+ if len(responses.Id) > 0 {
+ fetchfile = responses.Id
+ }
+ for _, line := range responses.Logs {
+ fmt.Print(line)
+ }
+ if flags&varlink.Continues == 0 {
+ break
+ }
+
+ }
+ if err != nil {
+ return err
+ }
+
+ outputToDir := false
+ outfile := c.Output
+ var outputFile *os.File
+ // If the result is supposed to be a dir, then we need to put the tarfile
+ // from the host in a temporary file
+ if options.Format != "oci-archive" && options.Format != "docker-archive" {
+ outputToDir = true
+ outputFile, err = ioutil.TempFile("", "saveimage_tempfile")
+ if err != nil {
+ return err
+ }
+ outfile = outputFile.Name()
+ defer outputFile.Close()
+ defer os.Remove(outputFile.Name())
+ }
+ // We now need to fetch the tarball result back to the more system
+ if err := r.GetFileFromRemoteHost(fetchfile, outfile, true); err != nil {
+ return err
+ }
+
+ // If the result is a tarball, we're done
+ // If it is a dir, we need to untar the temporary file into the dir
+ if outputToDir {
+ if err := utils.UntarToFileSystem(c.Output, outputFile, &archive.TarOptions{}); err != nil {
+ return err
+ }
+ }
+ return nil
+}
diff --git a/libpod/image/image.go b/libpod/image/image.go
index 028a795ea..547fb8994 100644
--- a/libpod/image/image.go
+++ b/libpod/image/image.go
@@ -5,14 +5,18 @@ import (
"encoding/json"
"fmt"
"io"
+ "os"
"strings"
"syscall"
"time"
types2 "github.com/containernetworking/cni/pkg/types"
cp "github.com/containers/image/copy"
+ "github.com/containers/image/directory"
+ dockerarchive "github.com/containers/image/docker/archive"
"github.com/containers/image/docker/reference"
"github.com/containers/image/manifest"
+ ociarchive "github.com/containers/image/oci/archive"
is "github.com/containers/image/storage"
"github.com/containers/image/tarball"
"github.com/containers/image/transports"
@@ -26,6 +30,7 @@ import (
"github.com/containers/storage"
"github.com/containers/storage/pkg/reexec"
digest "github.com/opencontainers/go-digest"
+ imgspecv1 "github.com/opencontainers/image-spec/specs-go/v1"
ociv1 "github.com/opencontainers/image-spec/specs-go/v1"
opentracing "github.com/opentracing/opentracing-go"
"github.com/pkg/errors"
@@ -1084,3 +1089,65 @@ func (i *Image) Comment(ctx context.Context, manifestType string) (string, error
}
return ociv1Img.History[0].Comment, nil
}
+
+// Save writes a container image to the filesystem
+func (i *Image) Save(ctx context.Context, source, format, output string, moreTags []string, quiet, compress bool) error {
+ var (
+ writer io.Writer
+ destRef types.ImageReference
+ manifestType string
+ err error
+ )
+
+ if quiet {
+ writer = os.Stderr
+ }
+ switch format {
+ case "oci-archive":
+ destImageName := imageNameForSaveDestination(i, source)
+ destRef, err = ociarchive.NewReference(output, destImageName) // destImageName may be ""
+ if err != nil {
+ return errors.Wrapf(err, "error getting OCI archive ImageReference for (%q, %q)", output, destImageName)
+ }
+ case "oci-dir":
+ destRef, err = directory.NewReference(output)
+ if err != nil {
+ return errors.Wrapf(err, "error getting directory ImageReference for %q", output)
+ }
+ manifestType = imgspecv1.MediaTypeImageManifest
+ case "docker-dir":
+ destRef, err = directory.NewReference(output)
+ if err != nil {
+ return errors.Wrapf(err, "error getting directory ImageReference for %q", output)
+ }
+ manifestType = manifest.DockerV2Schema2MediaType
+ case "docker-archive", "":
+ dst := output
+ destImageName := imageNameForSaveDestination(i, source)
+ if destImageName != "" {
+ dst = fmt.Sprintf("%s:%s", dst, destImageName)
+ }
+ destRef, err = dockerarchive.ParseReference(dst) // FIXME? Add dockerarchive.NewReference
+ if err != nil {
+ return errors.Wrapf(err, "error getting Docker archive ImageReference for %q", dst)
+ }
+ default:
+ return errors.Errorf("unknown format option %q", format)
+ }
+ // supports saving multiple tags to the same tar archive
+ var additionaltags []reference.NamedTagged
+ if len(moreTags) > 0 {
+ additionaltags, err = GetAdditionalTags(moreTags)
+ if err != nil {
+ return err
+ }
+ }
+ if err := i.PushImageToReference(ctx, destRef, manifestType, "", "", writer, compress, SigningOptions{}, &DockerRegistryOptions{}, additionaltags); err != nil {
+ if err2 := os.Remove(output); err2 != nil {
+ logrus.Errorf("error deleting %q: %v", output, err)
+ }
+ return errors.Wrapf(err, "unable to save %q", source)
+ }
+
+ return nil
+}
diff --git a/libpod/image/utils.go b/libpod/image/utils.go
index 3585428ad..544796a4b 100644
--- a/libpod/image/utils.go
+++ b/libpod/image/utils.go
@@ -1,6 +1,7 @@
package image
import (
+ "fmt"
"io"
"net/url"
"regexp"
@@ -148,3 +149,28 @@ func IsValidImageURI(imguri string) (bool, error) {
}
return true, nil
}
+
+// imageNameForSaveDestination returns a Docker-like reference appropriate for saving img,
+// which the user referred to as imgUserInput; or an empty string, if there is no appropriate
+// reference.
+func imageNameForSaveDestination(img *Image, imgUserInput string) string {
+ if strings.Contains(img.ID(), imgUserInput) {
+ return ""
+ }
+
+ prepend := ""
+ localRegistryPrefix := fmt.Sprintf("%s/", DefaultLocalRegistry)
+ if !strings.HasPrefix(imgUserInput, localRegistryPrefix) {
+ // we need to check if localhost was added to the image name in NewFromLocal
+ for _, name := range img.Names() {
+ // If the user is saving an image in the localhost registry, getLocalImage need
+ // a name that matches the format localhost/<tag1>:<tag2> or localhost/<tag>:latest to correctly
+ // set up the manifest and save.
+ if strings.HasPrefix(name, localRegistryPrefix) && (strings.HasSuffix(name, imgUserInput) || strings.HasSuffix(name, fmt.Sprintf("%s:latest", imgUserInput))) {
+ prepend = localRegistryPrefix
+ break
+ }
+ }
+ }
+ return fmt.Sprintf("%s%s", prepend, imgUserInput)
+}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-10-18 02:20:26 +0000