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migratev1_test.go
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migratev1_test.go
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package v1 // import "github.com/docker/docker/migrate/v1"
import (
"crypto/rand"
"encoding/hex"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"os"
"path/filepath"
"reflect"
"runtime"
"testing"
"github.com/docker/distribution/reference"
"github.com/docker/docker/distribution/metadata"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/opencontainers/go-digest"
)
func TestMigrateRefs(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "migrate-tags")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
ioutil.WriteFile(filepath.Join(tmpdir, "repositories-generic"), []byte(`{"Repositories":{"busybox":{"latest":"b3ca410aa2c115c05969a7b2c8cf8a9fcf62c1340ed6a601c9ee50df337ec108","sha256:16a2a52884c2a9481ed267c2d46483eac7693b813a63132368ab098a71303f8a":"b3ca410aa2c115c05969a7b2c8cf8a9fcf62c1340ed6a601c9ee50df337ec108"},"registry":{"2":"5d165b8e4b203685301c815e95663231691d383fd5e3d3185d1ce3f8dddead3d","latest":"8d5547a9f329b1d3f93198cd661fb5117e5a96b721c5cf9a2c389e7dd4877128"}}}`), 0600)
ta := &mockTagAdder{}
err = migrateRefs(tmpdir, "generic", ta, map[string]image.ID{
"5d165b8e4b203685301c815e95663231691d383fd5e3d3185d1ce3f8dddead3d": image.ID("sha256:2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae"),
"b3ca410aa2c115c05969a7b2c8cf8a9fcf62c1340ed6a601c9ee50df337ec108": image.ID("sha256:fcde2b2edba56bf408601fb721fe9b5c338d10ee429ea04fae5511b68fbf8fb9"),
"abcdef3434c115c05969a7b2c8cf8a9fcf62c1340ed6a601c9ee50df337ec108": image.ID("sha256:56434342345ae68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae"),
})
if err != nil {
t.Fatal(err)
}
expected := map[string]string{
"docker.io/library/busybox:latest": "sha256:fcde2b2edba56bf408601fb721fe9b5c338d10ee429ea04fae5511b68fbf8fb9",
"docker.io/library/busybox@sha256:16a2a52884c2a9481ed267c2d46483eac7693b813a63132368ab098a71303f8a": "sha256:fcde2b2edba56bf408601fb721fe9b5c338d10ee429ea04fae5511b68fbf8fb9",
"docker.io/library/registry:2": "sha256:2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae",
}
if !reflect.DeepEqual(expected, ta.refs) {
t.Fatalf("Invalid migrated tags: expected %q, got %q", expected, ta.refs)
}
// second migration is no-op
ioutil.WriteFile(filepath.Join(tmpdir, "repositories-generic"), []byte(`{"Repositories":{"busybox":{"latest":"b3ca410aa2c115c05969a7b2c8cf8a9fcf62c1340ed6a601c9ee50df337ec108"`), 0600)
err = migrateRefs(tmpdir, "generic", ta, map[string]image.ID{
"b3ca410aa2c115c05969a7b2c8cf8a9fcf62c1340ed6a601c9ee50df337ec108": image.ID("sha256:fcde2b2edba56bf408601fb721fe9b5c338d10ee429ea04fae5511b68fbf8fb9"),
})
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(expected, ta.refs) {
t.Fatalf("Invalid migrated tags: expected %q, got %q", expected, ta.refs)
}
}
func TestMigrateContainers(t *testing.T) {
// TODO Windows: Figure out why this is failing
if runtime.GOOS == "windows" {
t.Skip("Failing on Windows")
}
if runtime.GOARCH != "amd64" {
t.Skip("Test tailored to amd64 architecture")
}
tmpdir, err := ioutil.TempDir("", "migrate-containers")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
err = addContainer(tmpdir, `{"State":{"Running":false,"Paused":false,"Restarting":false,"OOMKilled":false,"Dead":false,"Pid":0,"ExitCode":0,"Error":"","StartedAt":"2015-11-10T21:42:40.604267436Z","FinishedAt":"2015-11-10T21:42:41.869265487Z"},"ID":"f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c","Created":"2015-11-10T21:42:40.433831551Z","Path":"sh","Args":[],"Config":{"Hostname":"f780ee3f80e6","Domainname":"","User":"","AttachStdin":true,"AttachStdout":true,"AttachStderr":true,"Tty":true,"OpenStdin":true,"StdinOnce":true,"Env":null,"Cmd":["sh"],"Image":"busybox","Volumes":null,"WorkingDir":"","Entrypoint":null,"OnBuild":null,"Labels":{}},"Image":"2c5ac3f849df8627fcf2822727f87c57f38b7129d3604fbc11d861fe856ff093","NetworkSettings":{"Bridge":"","EndpointID":"","Gateway":"","GlobalIPv6Address":"","GlobalIPv6PrefixLen":0,"HairpinMode":false,"IPAddress":"","IPPrefixLen":0,"IPv6Gateway":"","LinkLocalIPv6Address":"","LinkLocalIPv6PrefixLen":0,"MacAddress":"","NetworkID":"","PortMapping":null,"Ports":null,"SandboxKey":"","SecondaryIPAddresses":null,"SecondaryIPv6Addresses":null},"ResolvConfPath":"/var/lib/docker/containers/f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c/resolv.conf","HostnamePath":"/var/lib/docker/containers/f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c/hostname","HostsPath":"/var/lib/docker/containers/f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c/hosts","LogPath":"/var/lib/docker/containers/f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c/f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c-json.log","Name":"/determined_euclid","Driver":"overlay","ExecDriver":"native-0.2","MountLabel":"","ProcessLabel":"","RestartCount":0,"UpdateDns":false,"HasBeenStartedBefore":false,"MountPoints":{},"Volumes":{},"VolumesRW":{},"AppArmorProfile":""}`)
if err != nil {
t.Fatal(err)
}
// container with invalid image
err = addContainer(tmpdir, `{"State":{"Running":false,"Paused":false,"Restarting":false,"OOMKilled":false,"Dead":false,"Pid":0,"ExitCode":0,"Error":"","StartedAt":"2015-11-10T21:42:40.604267436Z","FinishedAt":"2015-11-10T21:42:41.869265487Z"},"ID":"e780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c","Created":"2015-11-10T21:42:40.433831551Z","Path":"sh","Args":[],"Config":{"Hostname":"f780ee3f80e6","Domainname":"","User":"","AttachStdin":true,"AttachStdout":true,"AttachStderr":true,"Tty":true,"OpenStdin":true,"StdinOnce":true,"Env":null,"Cmd":["sh"],"Image":"busybox","Volumes":null,"WorkingDir":"","Entrypoint":null,"OnBuild":null,"Labels":{}},"Image":"4c5ac3f849df8627fcf2822727f87c57f38b7129d3604fbc11d861fe856ff093","NetworkSettings":{"Bridge":"","EndpointID":"","Gateway":"","GlobalIPv6Address":"","GlobalIPv6PrefixLen":0,"HairpinMode":false,"IPAddress":"","IPPrefixLen":0,"IPv6Gateway":"","LinkLocalIPv6Address":"","LinkLocalIPv6PrefixLen":0,"MacAddress":"","NetworkID":"","PortMapping":null,"Ports":null,"SandboxKey":"","SecondaryIPAddresses":null,"SecondaryIPv6Addresses":null},"ResolvConfPath":"/var/lib/docker/containers/f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c/resolv.conf","HostnamePath":"/var/lib/docker/containers/f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c/hostname","HostsPath":"/var/lib/docker/containers/f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c/hosts","LogPath":"/var/lib/docker/containers/f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c/f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c-json.log","Name":"/determined_euclid","Driver":"overlay","ExecDriver":"native-0.2","MountLabel":"","ProcessLabel":"","RestartCount":0,"UpdateDns":false,"HasBeenStartedBefore":false,"MountPoints":{},"Volumes":{},"VolumesRW":{},"AppArmorProfile":""}`)
if err != nil {
t.Fatal(err)
}
ifs, err := image.NewFSStoreBackend(filepath.Join(tmpdir, "imagedb"))
if err != nil {
t.Fatal(err)
}
ls := &mockMounter{}
mmMap := make(map[string]image.LayerGetReleaser)
mmMap[runtime.GOOS] = ls
is, err := image.NewImageStore(ifs, mmMap)
if err != nil {
t.Fatal(err)
}
imgID, err := is.Create([]byte(`{"architecture":"amd64","config":{"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"Cmd":["sh"],"Entrypoint":null,"Env":null,"Hostname":"23304fc829f9","Image":"d1592a710ac323612bd786fa8ac20727c58d8a67847e5a65177c594f43919498","Labels":null,"OnBuild":null,"OpenStdin":false,"StdinOnce":false,"Tty":false,"Volumes":null,"WorkingDir":"","Domainname":"","User":""},"container":"349b014153779e30093d94f6df2a43c7a0a164e05aa207389917b540add39b51","container_config":{"AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"Cmd":["/bin/sh","-c","#(nop) CMD [\"sh\"]"],"Entrypoint":null,"Env":null,"Hostname":"23304fc829f9","Image":"d1592a710ac323612bd786fa8ac20727c58d8a67847e5a65177c594f43919498","Labels":null,"OnBuild":null,"OpenStdin":false,"StdinOnce":false,"Tty":false,"Volumes":null,"WorkingDir":"","Domainname":"","User":""},"created":"2015-10-31T22:22:55.613815829Z","docker_version":"1.8.2","history":[{"created":"2015-10-31T22:22:54.690851953Z","created_by":"/bin/sh -c #(nop) ADD file:a3bc1e842b69636f9df5256c49c5374fb4eef1e281fe3f282c65fb853ee171c5 in /"},{"created":"2015-10-31T22:22:55.613815829Z","created_by":"/bin/sh -c #(nop) CMD [\"sh\"]"}],"os":"linux","rootfs":{"type":"layers","diff_ids":["sha256:c6f988f4874bb0add23a778f753c65efe992244e148a1d2ec2a8b664fb66bbd1","sha256:5f70bf18a086007016e948b04aed3b82103a36bea41755b6cddfaf10ace3c6ef"]}}`))
if err != nil {
t.Fatal(err)
}
err = migrateContainers(tmpdir, ls, is, map[string]image.ID{
"2c5ac3f849df8627fcf2822727f87c57f38b7129d3604fbc11d861fe856ff093": imgID,
})
if err != nil {
t.Fatal(err)
}
expected := []mountInfo{{
"f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c",
"f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c",
"sha256:c3191d32a37d7159b2e30830937d2e30268ad6c375a773a8994911a3aba9b93f",
}}
if !reflect.DeepEqual(expected, ls.mounts) {
t.Fatalf("invalid mounts: expected %q, got %q", expected, ls.mounts)
}
if actual, expected := ls.count, 0; actual != expected {
t.Fatalf("invalid active mounts: expected %d, got %d", expected, actual)
}
config2, err := ioutil.ReadFile(filepath.Join(tmpdir, "containers", "f780ee3f80e66e9b432a57049597118a66aab8932be88e5628d4c824edbee37c", "config.v2.json"))
if err != nil {
t.Fatal(err)
}
var config struct{ Image string }
err = json.Unmarshal(config2, &config)
if err != nil {
t.Fatal(err)
}
if actual, expected := config.Image, string(imgID); actual != expected {
t.Fatalf("invalid image pointer in migrated config: expected %q, got %q", expected, actual)
}
}
func TestMigrateImages(t *testing.T) {
// TODO Windows: Figure out why this is failing
if runtime.GOOS == "windows" {
t.Skip("Failing on Windows")
}
if runtime.GOARCH != "amd64" {
t.Skip("Test tailored to amd64 architecture")
}
tmpdir, err := ioutil.TempDir("", "migrate-images")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
// busybox from 1.9
id1, err := addImage(tmpdir, `{"architecture":"amd64","config":{"Hostname":"23304fc829f9","Domainname":"","User":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":null,"Cmd":null,"Image":"","Volumes":null,"WorkingDir":"","Entrypoint":null,"OnBuild":null,"Labels":null},"container":"23304fc829f9b9349416f6eb1afec162907eba3a328f51d53a17f8986f865d65","container_config":{"Hostname":"23304fc829f9","Domainname":"","User":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":null,"Cmd":["/bin/sh","-c","#(nop) ADD file:a3bc1e842b69636f9df5256c49c5374fb4eef1e281fe3f282c65fb853ee171c5 in /"],"Image":"","Volumes":null,"WorkingDir":"","Entrypoint":null,"OnBuild":null,"Labels":null},"created":"2015-10-31T22:22:54.690851953Z","docker_version":"1.8.2","layer_id":"sha256:55dc925c23d1ed82551fd018c27ac3ee731377b6bad3963a2a4e76e753d70e57","os":"linux"}`, "", "")
if err != nil {
t.Fatal(err)
}
id2, err := addImage(tmpdir, `{"architecture":"amd64","config":{"Hostname":"23304fc829f9","Domainname":"","User":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":null,"Cmd":["sh"],"Image":"d1592a710ac323612bd786fa8ac20727c58d8a67847e5a65177c594f43919498","Volumes":null,"WorkingDir":"","Entrypoint":null,"OnBuild":null,"Labels":null},"container":"349b014153779e30093d94f6df2a43c7a0a164e05aa207389917b540add39b51","container_config":{"Hostname":"23304fc829f9","Domainname":"","User":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":null,"Cmd":["/bin/sh","-c","#(nop) CMD [\"sh\"]"],"Image":"d1592a710ac323612bd786fa8ac20727c58d8a67847e5a65177c594f43919498","Volumes":null,"WorkingDir":"","Entrypoint":null,"OnBuild":null,"Labels":null},"created":"2015-10-31T22:22:55.613815829Z","docker_version":"1.8.2","layer_id":"sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4","os":"linux","parent_id":"sha256:039b63dd2cbaa10d6015ea574392530571ed8d7b174090f032211285a71881d0"}`, id1, "")
if err != nil {
t.Fatal(err)
}
ifs, err := image.NewFSStoreBackend(filepath.Join(tmpdir, "imagedb"))
if err != nil {
t.Fatal(err)
}
ls := &mockRegistrar{}
mrMap := make(map[string]image.LayerGetReleaser)
mrMap[runtime.GOOS] = ls
is, err := image.NewImageStore(ifs, mrMap)
if err != nil {
t.Fatal(err)
}
ms, err := metadata.NewFSMetadataStore(filepath.Join(tmpdir, "distribution"))
if err != nil {
t.Fatal(err)
}
mappings := make(map[string]image.ID)
err = migrateImages(tmpdir, ls, is, ms, mappings)
if err != nil {
t.Fatal(err)
}
expected := map[string]image.ID{
id1: image.ID("sha256:ca406eaf9c26898414ff5b7b3a023c33310759d6203be0663dbf1b3a712f432d"),
id2: image.ID("sha256:a488bec94bb96b26a968f913d25ef7d8d204d727ca328b52b4b059c7d03260b6"),
}
if !reflect.DeepEqual(mappings, expected) {
t.Fatalf("invalid image mappings: expected %q, got %q", expected, mappings)
}
if actual, expected := ls.count, 2; actual != expected {
t.Fatalf("invalid register count: expected %q, got %q", expected, actual)
}
ls.count = 0
// next images are busybox from 1.8.2
_, err = addImage(tmpdir, `{"id":"17583c7dd0dae6244203b8029733bdb7d17fccbb2b5d93e2b24cf48b8bfd06e2","parent":"d1592a710ac323612bd786fa8ac20727c58d8a67847e5a65177c594f43919498","created":"2015-10-31T22:22:55.613815829Z","container":"349b014153779e30093d94f6df2a43c7a0a164e05aa207389917b540add39b51","container_config":{"Hostname":"23304fc829f9","Domainname":"","User":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"ExposedPorts":null,"PublishService":"","Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":null,"Cmd":["/bin/sh","-c","#(nop) CMD [\"sh\"]"],"Image":"d1592a710ac323612bd786fa8ac20727c58d8a67847e5a65177c594f43919498","Volumes":null,"VolumeDriver":"","WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"MacAddress":"","OnBuild":null,"Labels":null},"docker_version":"1.8.2","config":{"Hostname":"23304fc829f9","Domainname":"","User":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"ExposedPorts":null,"PublishService":"","Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":null,"Cmd":["sh"],"Image":"d1592a710ac323612bd786fa8ac20727c58d8a67847e5a65177c594f43919498","Volumes":null,"VolumeDriver":"","WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"MacAddress":"","OnBuild":null,"Labels":null},"architecture":"amd64","os":"linux","Size":0}`, "", "sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4")
if err != nil {
t.Fatal(err)
}
_, err = addImage(tmpdir, `{"id":"d1592a710ac323612bd786fa8ac20727c58d8a67847e5a65177c594f43919498","created":"2015-10-31T22:22:54.690851953Z","container":"23304fc829f9b9349416f6eb1afec162907eba3a328f51d53a17f8986f865d65","container_config":{"Hostname":"23304fc829f9","Domainname":"","User":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"ExposedPorts":null,"PublishService":"","Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":null,"Cmd":["/bin/sh","-c","#(nop) ADD file:a3bc1e842b69636f9df5256c49c5374fb4eef1e281fe3f282c65fb853ee171c5 in /"],"Image":"","Volumes":null,"VolumeDriver":"","WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"MacAddress":"","OnBuild":null,"Labels":null},"docker_version":"1.8.2","config":{"Hostname":"23304fc829f9","Domainname":"","User":"","AttachStdin":false,"AttachStdout":false,"AttachStderr":false,"ExposedPorts":null,"PublishService":"","Tty":false,"OpenStdin":false,"StdinOnce":false,"Env":null,"Cmd":null,"Image":"","Volumes":null,"VolumeDriver":"","WorkingDir":"","Entrypoint":null,"NetworkDisabled":false,"MacAddress":"","OnBuild":null,"Labels":null},"architecture":"amd64","os":"linux","Size":1108935}`, "", "sha256:55dc925c23d1ed82551fd018c27ac3ee731377b6bad3963a2a4e76e753d70e57")
if err != nil {
t.Fatal(err)
}
err = migrateImages(tmpdir, ls, is, ms, mappings)
if err != nil {
t.Fatal(err)
}
expected["d1592a710ac323612bd786fa8ac20727c58d8a67847e5a65177c594f43919498"] = image.ID("sha256:c091bb33854e57e6902b74c08719856d30b5593c7db6143b2b48376b8a588395")
expected["17583c7dd0dae6244203b8029733bdb7d17fccbb2b5d93e2b24cf48b8bfd06e2"] = image.ID("sha256:d963020e755ff2715b936065949472c1f8a6300144b922992a1a421999e71f07")
if actual, expected := ls.count, 2; actual != expected {
t.Fatalf("invalid register count: expected %q, got %q", expected, actual)
}
v2MetadataService := metadata.NewV2MetadataService(ms)
receivedMetadata, err := v2MetadataService.GetMetadata(layer.EmptyLayer.DiffID())
if err != nil {
t.Fatal(err)
}
expectedMetadata := []metadata.V2Metadata{
{Digest: digest.Digest("sha256:55dc925c23d1ed82551fd018c27ac3ee731377b6bad3963a2a4e76e753d70e57")},
{Digest: digest.Digest("sha256:a3ed95caeb02ffe68cdd9fd84406680ae93d633cb16422d00e8a7c22955b46d4")},
}
if !reflect.DeepEqual(expectedMetadata, receivedMetadata) {
t.Fatalf("invalid metadata: expected %q, got %q", expectedMetadata, receivedMetadata)
}
}
func TestMigrateUnsupported(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "migrate-empty")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
err = os.MkdirAll(filepath.Join(tmpdir, "graph"), 0700)
if err != nil {
t.Fatal(err)
}
err = Migrate(tmpdir, "generic", nil, nil, nil, nil)
if err != errUnsupported {
t.Fatalf("expected unsupported error, got %q", err)
}
}
func TestMigrateEmptyDir(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "migrate-empty")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
err = Migrate(tmpdir, "generic", nil, nil, nil, nil)
if err != nil {
t.Fatal(err)
}
}
func addImage(dest, jsonConfig, parent, checksum string) (string, error) {
var config struct{ ID string }
if err := json.Unmarshal([]byte(jsonConfig), &config); err != nil {
return "", err
}
if config.ID == "" {
b := make([]byte, 32)
rand.Read(b)
config.ID = hex.EncodeToString(b)
}
contDir := filepath.Join(dest, "graph", config.ID)
if err := os.MkdirAll(contDir, 0700); err != nil {
return "", err
}
if err := ioutil.WriteFile(filepath.Join(contDir, "json"), []byte(jsonConfig), 0600); err != nil {
return "", err
}
if checksum != "" {
if err := ioutil.WriteFile(filepath.Join(contDir, "checksum"), []byte(checksum), 0600); err != nil {
return "", err
}
}
if err := ioutil.WriteFile(filepath.Join(contDir, ".migration-diffid"), []byte(layer.EmptyLayer.DiffID()), 0600); err != nil {
return "", err
}
if err := ioutil.WriteFile(filepath.Join(contDir, ".migration-size"), []byte("0"), 0600); err != nil {
return "", err
}
if parent != "" {
if err := ioutil.WriteFile(filepath.Join(contDir, "parent"), []byte(parent), 0600); err != nil {
return "", err
}
}
if checksum != "" {
if err := ioutil.WriteFile(filepath.Join(contDir, "checksum"), []byte(checksum), 0600); err != nil {
return "", err
}
}
return config.ID, nil
}
func addContainer(dest, jsonConfig string) error {
var config struct{ ID string }
if err := json.Unmarshal([]byte(jsonConfig), &config); err != nil {
return err
}
contDir := filepath.Join(dest, "containers", config.ID)
if err := os.MkdirAll(contDir, 0700); err != nil {
return err
}
return ioutil.WriteFile(filepath.Join(contDir, "config.json"), []byte(jsonConfig), 0600)
}
type mockTagAdder struct {
refs map[string]string
}
func (t *mockTagAdder) AddTag(ref reference.Named, id digest.Digest, force bool) error {
if t.refs == nil {
t.refs = make(map[string]string)
}
t.refs[ref.String()] = id.String()
return nil
}
func (t *mockTagAdder) AddDigest(ref reference.Canonical, id digest.Digest, force bool) error {
return t.AddTag(ref, id, force)
}
type mockRegistrar struct {
layers map[layer.ChainID]*mockLayer
count int
}
func (r *mockRegistrar) RegisterByGraphID(graphID string, parent layer.ChainID, diffID layer.DiffID, tarDataFile string, size int64) (layer.Layer, error) {
r.count++
l := &mockLayer{}
if parent != "" {
p, exists := r.layers[parent]
if !exists {
return nil, fmt.Errorf("invalid parent %q", parent)
}
l.parent = p
l.diffIDs = append(l.diffIDs, p.diffIDs...)
}
l.diffIDs = append(l.diffIDs, diffID)
if r.layers == nil {
r.layers = make(map[layer.ChainID]*mockLayer)
}
r.layers[l.ChainID()] = l
return l, nil
}
func (r *mockRegistrar) Release(l layer.Layer) ([]layer.Metadata, error) {
return nil, nil
}
func (r *mockRegistrar) Get(layer.ChainID) (layer.Layer, error) {
return nil, nil
}
type mountInfo struct {
name, graphID, parent string
}
type mockMounter struct {
mounts []mountInfo
count int
}
func (r *mockMounter) CreateRWLayerByGraphID(name string, graphID string, parent layer.ChainID) error {
r.mounts = append(r.mounts, mountInfo{name, graphID, string(parent)})
return nil
}
func (r *mockMounter) Unmount(string) error {
r.count--
return nil
}
func (r *mockMounter) Get(layer.ChainID) (layer.Layer, error) {
return nil, nil
}
func (r *mockMounter) Release(layer.Layer) ([]layer.Metadata, error) {
return nil, nil
}
type mockLayer struct {
diffIDs []layer.DiffID
parent *mockLayer
}
func (l *mockLayer) TarStream() (io.ReadCloser, error) {
return nil, nil
}
func (l *mockLayer) TarStreamFrom(layer.ChainID) (io.ReadCloser, error) {
return nil, nil
}
func (l *mockLayer) ChainID() layer.ChainID {
return layer.CreateChainID(l.diffIDs)
}
func (l *mockLayer) DiffID() layer.DiffID {
return l.diffIDs[len(l.diffIDs)-1]
}
func (l *mockLayer) Parent() layer.Layer {
if l.parent == nil {
return nil
}
return l.parent
}
func (l *mockLayer) Size() (int64, error) {
return 0, nil
}
func (l *mockLayer) DiffSize() (int64, error) {
return 0, nil
}
func (l *mockLayer) Metadata() (map[string]string, error) {
return nil, nil
}