diff options
Diffstat (limited to 'pkg/checkpoint')
| -rw-r--r-- | pkg/checkpoint/checkpoint_restore.go | 26 | ||||
| -rw-r--r-- | pkg/checkpoint/crutils/checkpoint_restore_utils.go | 55 |
2 files changed, 57 insertions, 24 deletions
diff --git a/pkg/checkpoint/checkpoint_restore.go b/pkg/checkpoint/checkpoint_restore.go index 85fe6a77e..c371adf5b 100644 --- a/pkg/checkpoint/checkpoint_restore.go +++ b/pkg/checkpoint/checkpoint_restore.go @@ -6,7 +6,6 @@ import ( "os" metadata "github.com/checkpoint-restore/checkpointctl/lib" - "github.com/checkpoint-restore/go-criu/v5/stats" "github.com/containers/common/libimage" "github.com/containers/common/pkg/config" "github.com/containers/podman/v3/libpod" @@ -14,10 +13,8 @@ import ( "github.com/containers/podman/v3/pkg/checkpoint/crutils" "github.com/containers/podman/v3/pkg/criu" "github.com/containers/podman/v3/pkg/domain/entities" - "github.com/containers/podman/v3/pkg/errorhandling" "github.com/containers/podman/v3/pkg/specgen/generate" "github.com/containers/podman/v3/pkg/specgenutil" - "github.com/containers/storage/pkg/archive" spec "github.com/opencontainers/runtime-spec/specs-go" "github.com/pkg/errors" "github.com/sirupsen/logrus" @@ -30,24 +27,6 @@ import ( func CRImportCheckpoint(ctx context.Context, runtime *libpod.Runtime, restoreOptions entities.RestoreOptions) ([]*libpod.Container, error) { // First get the container definition from the // tarball to a temporary directory - archiveFile, err := os.Open(restoreOptions.Import) - if err != nil { - return nil, errors.Wrap(err, "failed to open checkpoint archive for import") - } - defer errorhandling.CloseQuiet(archiveFile) - options := &archive.TarOptions{ - // Here we only need the files config.dump and spec.dump - ExcludePatterns: []string{ - "volumes", - "ctr.log", - "artifacts", - stats.StatsDump, - metadata.RootFsDiffTar, - metadata.DeletedFilesFile, - metadata.NetworkStatusFile, - metadata.CheckpointDirectory, - }, - } dir, err := ioutil.TempDir("", "checkpoint") if err != nil { return nil, err @@ -57,9 +36,8 @@ func CRImportCheckpoint(ctx context.Context, runtime *libpod.Runtime, restoreOpt logrus.Errorf("Could not recursively remove %s: %q", dir, err) } }() - err = archive.Untar(archiveFile, dir, options) - if err != nil { - return nil, errors.Wrapf(err, "Unpacking of checkpoint archive %s failed", restoreOptions.Import) + if err := crutils.CRImportCheckpointConfigOnly(dir, restoreOptions.Import); err != nil { + return nil, err } // Load spec.dump from temporary directory diff --git a/pkg/checkpoint/crutils/checkpoint_restore_utils.go b/pkg/checkpoint/crutils/checkpoint_restore_utils.go index 3b77368bb..2765d18e8 100644 --- a/pkg/checkpoint/crutils/checkpoint_restore_utils.go +++ b/pkg/checkpoint/crutils/checkpoint_restore_utils.go @@ -3,11 +3,13 @@ package crutils import ( "bytes" "io" + "io/ioutil" "os" "os/exec" "path/filepath" metadata "github.com/checkpoint-restore/checkpointctl/lib" + "github.com/checkpoint-restore/go-criu/v5/stats" "github.com/containers/storage/pkg/archive" "github.com/opencontainers/selinux/go-selinux/label" "github.com/pkg/errors" @@ -39,6 +41,36 @@ func CRImportCheckpointWithoutConfig(destination, input string) error { return nil } +// CRImportCheckpointConfigOnly only imports the checkpoint configuration +// from the checkpoint archive (input) into the directory destination. +// Only the files "config.dump" and "spec.dump" are extracted. +func CRImportCheckpointConfigOnly(destination, input string) error { + archiveFile, err := os.Open(input) + if err != nil { + return errors.Wrapf(err, "Failed to open checkpoint archive %s for import", input) + } + + defer archiveFile.Close() + options := &archive.TarOptions{ + // Here we only need the files config.dump and spec.dump + ExcludePatterns: []string{ + "volumes", + "ctr.log", + "artifacts", + stats.StatsDump, + metadata.RootFsDiffTar, + metadata.DeletedFilesFile, + metadata.NetworkStatusFile, + metadata.CheckpointDirectory, + }, + } + if err = archive.Untar(archiveFile, destination, options); err != nil { + return errors.Wrapf(err, "Unpacking of checkpoint archive %s failed", input) + } + + return nil +} + // CRRemoveDeletedFiles loads the list of deleted files and if // it exists deletes all files listed. func CRRemoveDeletedFiles(id, baseDirectory, containerRootDirectory string) error { @@ -200,3 +232,26 @@ func CRRuntimeSupportsPodCheckpointRestore(runtimePath string) bool { out, _ := cmd.CombinedOutput() return bytes.Contains(out, []byte("flag needs an argument")) } + +// CRGetRuntimeFromArchive extracts the checkpoint metadata from the +// given checkpoint archive and returns the runtime used to create +// the given checkpoint archive. +func CRGetRuntimeFromArchive(input string) (*string, error) { + dir, err := ioutil.TempDir("", "checkpoint") + if err != nil { + return nil, err + } + defer os.RemoveAll(dir) + + if err := CRImportCheckpointConfigOnly(dir, input); err != nil { + return nil, err + } + + // Load config.dump from temporary directory + ctrConfig := new(metadata.ContainerConfig) + if _, err = metadata.ReadJSONFile(ctrConfig, dir, metadata.ConfigDumpFile); err != nil { + return nil, err + } + + return &ctrConfig.OCIRuntime, nil +} |