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Replace events/convert with typeurl

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Signed-off-by: Michael Crosby <crosbymichael@gmail.com>
This commit is contained in:
Michael Crosby 2017-07-05 16:05:49 -07:00
parent a60511d5aa
commit 448dc0dfa8
9 changed files with 122 additions and 195 deletions
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11
cmd/ctr/events.go
View File

@ -7,7 +7,7 @@ import (
"text/tabwriter"
eventsapi "github.com/containerd/containerd/api/services/events/v1"
"github.com/containerd/containerd/events"
"github.com/containerd/containerd/typeurl"
"github.com/urfave/cli"
)
@ -57,13 +57,11 @@ var eventsCommand = cli.Command{
func getEventOutput(env *eventsapi.Envelope) (string, error) {
out := ""
var de events.DynamicEvent
if err := events.UnmarshalEvent(env.Event, &de); err != nil {
v, err := typeurl.UnmarshalAny(env.Event)
if err != nil {
return "", err
}
switch e := de.Event.(type) {
switch e := v.(type) {
case *eventsapi.ContainerCreate:
out = fmt.Sprintf("id=%s image=%s runtime=%s", e.ContainerID, e.Image, e.Runtime)
case *eventsapi.TaskCreate:
@ -105,6 +103,5 @@ func getEventOutput(env *eventsapi.Envelope) (string, error) {
default:
out = env.Event.TypeUrl
}
return out, nil
}

2
cmd/ctr/shim.go
View File

@ -236,7 +236,7 @@ var shimExecCommand = cli.Command{
if err != nil {
return err
}
url, err := typeurl.TypeUrl(specs.Process{})
url, err := typeurl.TypeURL(specs.Process{})
if err != nil {
return err
}

72
events/convert.go
View File

@ -1,72 +0,0 @@
package events
import (
"github.com/gogo/protobuf/proto"
"github.com/gogo/protobuf/types"
"github.com/pkg/errors"
)
const (
typesPrefix = "types.containerd.io/"
)
// MarshalEvent marshal the event into an any, namespacing the type url to the
// containerd types.
func MarshalEvent(event Event) (*types.Any, error) {
pb, ok := event.(proto.Message)
if !ok {
return nil, errors.Errorf("%T not a protobuf", event)
}
url := typesPrefix + proto.MessageName(pb)
val, err := proto.Marshal(pb)
if err != nil {
return nil, err
}
return &types.Any{
TypeUrl: url,
Value: val,
}, nil
}
// DynamEvent acts as a holder type for unmarshaling events where the type is
// not previously known.
type DynamicEvent struct {
Event
}
// UnmarshalEvent provides an event object based on the provided any.
//
// Use with DynamicEvent (or protobuf/types.DynamicAny) if the type is not
// known before hand.
func UnmarshalEvent(any *types.Any, event Event) error {
switch v := event.(type) {
case proto.Message:
if err := types.UnmarshalAny(any, v); err != nil {
return errors.Wrapf(err, "failed to unmarshal event %v", any)
}
case *DynamicEvent:
var da types.DynamicAny
if err := types.UnmarshalAny(any, &da); err != nil {
return errors.Wrapf(err, "failed to unmarshal event %v", any)
}
v.Event = da.Message
default:
return errors.Errorf("unsupported event type: %T", event)
}
return nil
}
// Is returns true if the event in any will unmarashal into the provided event.
func Is(any *types.Any, event Event) bool {
pb, ok := event.(proto.Message)
if !ok {
return false
}
return types.Is(any, pb)
}

62
events/convert_test.go
View File

@ -1,62 +0,0 @@
package events
import (
"fmt"
"reflect"
"testing"
events "github.com/containerd/containerd/api/services/events/v1"
)
func TestMarshalEvent(t *testing.T) {
for _, testcase := range []struct {
event Event
url string
}{
{
event: &events.TaskStart{},
url: "types.containerd.io/containerd.services.events.v1.TaskStart",
},
{
event: &events.NamespaceUpdate{},
url: "types.containerd.io/containerd.services.events.v1.NamespaceUpdate",
},
} {
t.Run(fmt.Sprintf("%T", testcase.event), func(t *testing.T) {
a, err := MarshalEvent(testcase.event)
if err != nil {
t.Fatal(err)
}
if a.TypeUrl != testcase.url {
t.Fatalf("unexpected url: %v != %v", a.TypeUrl, testcase.url)
}
var de DynamicEvent
if err := UnmarshalEvent(a, &de); err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(de.Event, testcase.event) {
t.Fatalf("round trip failed %v != %v", de.Event, testcase.event)
}
})
}
}
func BenchmarkMarshalEvent(b *testing.B) {
ev := &events.TaskStart{}
expected, err := MarshalEvent(ev)
if err != nil {
b.Fatal(err)
}
for i := 0; i < b.N; i++ {
a, err := MarshalEvent(ev)
if err != nil {
b.Fatal(err)
}
if a.TypeUrl != expected.TypeUrl {
b.Fatalf("incorrect type url: %v != %v", a, expected)
}
}
}

3
events/sink.go
View File

@ -8,6 +8,7 @@ import (
"github.com/containerd/containerd/api/services/events/v1"
"github.com/containerd/containerd/log"
"github.com/containerd/containerd/namespaces"
"github.com/containerd/containerd/typeurl"
goevents "github.com/docker/go-events"
"github.com/pkg/errors"
)
@ -35,7 +36,7 @@ func (s *eventSink) Write(evt goevents.Event) error {
return nil
}
eventData, err := MarshalEvent(e.event)
eventData, err := typeurl.MarshalAny(e.event)
if err != nil {
return err
}

10
process.go
View File

@ -6,7 +6,6 @@ import (
eventsapi "github.com/containerd/containerd/api/services/events/v1"
"github.com/containerd/containerd/api/services/tasks/v1"
"github.com/containerd/containerd/events"
"github.com/containerd/containerd/typeurl"
specs "github.com/opencontainers/runtime-spec/specs-go"
)
@ -79,14 +78,11 @@ evloop:
if err != nil {
return UnknownExitStatus, err
}
switch {
case events.Is(evt.Event, &eventsapi.RuntimeEvent{}):
var e eventsapi.RuntimeEvent
if err := events.UnmarshalEvent(evt.Event, &e); err != nil {
v, err := typeurl.UnmarshalAny(evt.Event)
if err != nil {
return UnknownExitStatus, err
}
if e, ok := v.(*eventsapi.RuntimeEvent); ok {
if e.Type != eventsapi.RuntimeEvent_EXIT {
continue evloop
}

18
task.go
View File

@ -14,9 +14,9 @@ import (
eventsapi "github.com/containerd/containerd/api/services/events/v1"
"github.com/containerd/containerd/api/services/tasks/v1"
"github.com/containerd/containerd/content"
"github.com/containerd/containerd/events"
"github.com/containerd/containerd/rootfs"
"github.com/containerd/containerd/runtime"
"github.com/containerd/containerd/typeurl"
"github.com/opencontainers/image-spec/specs-go/v1"
specs "github.com/opencontainers/runtime-spec/specs-go"
"google.golang.org/grpc"
@ -149,37 +149,27 @@ func (t *task) Status(ctx context.Context) (TaskStatus, error) {
// Wait is a blocking call that will wait for the task to exit and return the exit status
func (t *task) Wait(ctx context.Context) (uint32, error) {
// TODO (ehazlett): add filtering for specific event
eventstream, err := t.client.EventService().Stream(ctx, &eventsapi.StreamEventsRequest{})
if err != nil {
return UnknownExitStatus, err
}
<-t.pidSync
var e eventsapi.RuntimeEvent
for {
evt, err := eventstream.Recv()
if err != nil {
return UnknownExitStatus, err
}
if !events.Is(evt.Event, &eventsapi.RuntimeEvent{}) {
continue
}
if err := events.UnmarshalEvent(evt.Event, &e); err != nil {
return UnknownExitStatus, err
}
v, err := typeurl.UnmarshalAny(evt.Event)
if e, ok := v.(*eventsapi.RuntimeEvent); ok {
if e.Type != eventsapi.RuntimeEvent_EXIT {
continue
}
if e.ID == t.containerID && e.Pid == t.pid {
return e.ExitStatus, nil
}
}
}
}
// Delete deletes the task and its runtime state

49
typeurl/types.go
View File

@ -3,15 +3,16 @@ package typeurl
import (
"encoding/json"
"errors"
"path/filepath"
"path"
"reflect"
"strings"
"sync"
"github.com/gogo/protobuf/proto"
"github.com/gogo/protobuf/types"
)
const Namespace = "types.containerd.io"
const Prefix = "types.containerd.io"
var (
mu sync.Mutex
@ -28,17 +29,22 @@ func Register(v interface{}, args ...string) {
if _, ok := registry[t]; ok {
panic(ErrRegistered)
}
registry[t] = filepath.Join(append([]string{Namespace}, args...)...)
registry[t] = path.Join(append([]string{Prefix}, args...)...)
}
// TypeUrl returns the type url for a registred type
func TypeUrl(v interface{}) (string, error) {
// TypeURL returns the type url for a registred type
func TypeURL(v interface{}) (string, error) {
mu.Lock()
defer mu.Unlock()
u, ok := registry[tryDereference(v)]
if !ok {
// fallback to the proto registry if it is a proto message
pb, ok := v.(proto.Message)
if !ok {
return "", ErrNotExists
}
return path.Join(Prefix, proto.MessageName(pb)), nil
}
return u, nil
}
@ -47,7 +53,7 @@ func MarshalAny(v interface{}) (*types.Any, error) {
err error
data []byte
)
url, err := TypeUrl(v)
url, err := TypeURL(v)
if err != nil {
return nil, err
}
@ -71,23 +77,38 @@ func UnmarshalAny(any *types.Any) (interface{}, error) {
if err != nil {
return nil, err
}
v := reflect.New(t).Interface()
switch dt := v.(type) {
case proto.Message:
err = proto.Unmarshal(any.Value, dt)
default:
v := reflect.New(t.t).Interface()
if t.isProto {
err = proto.Unmarshal(any.Value, v.(proto.Message))
} else {
err = json.Unmarshal(any.Value, v)
}
return v, err
}
func getTypeByUrl(url string) (reflect.Type, error) {
type urlType struct {
t reflect.Type
isProto bool
}
func getTypeByUrl(url string) (urlType, error) {
for t, u := range registry {
if u == url {
return t, nil
return urlType{
t: t,
}, nil
}
}
return nil, ErrNotExists
// fallback to proto registry
t := proto.MessageType(strings.TrimPrefix(url, Prefix+"/"))
if t != nil {
return urlType{
// get the underlying Elem because proto returns a pointer to the type
t: t.Elem(),
isProto: true,
}, nil
}
return urlType{}, ErrNotExists
}
func tryDereference(v interface{}) reflect.Type {

74
typeurl/types_test.go
View File

@ -1,9 +1,13 @@
package typeurl
import (
"fmt"
"path/filepath"
"reflect"
"testing"
eventsapi "github.com/containerd/containerd/api/services/events/v1"
events "github.com/containerd/containerd/events"
)
type test struct {
@ -17,10 +21,10 @@ func clear() {
func TestRegsiterValueGetValue(t *testing.T) {
clear()
expected := filepath.Join(Namespace, "test")
expected := filepath.Join(Prefix, "test")
Register(test{}, "test")
url, err := TypeUrl(test{})
url, err := TypeURL(test{})
if err != nil {
t.Fatal(err)
}
@ -31,10 +35,10 @@ func TestRegsiterValueGetValue(t *testing.T) {
func TestRegsiterValueGetPointer(t *testing.T) {
clear()
expected := filepath.Join(Namespace, "test")
expected := filepath.Join(Prefix, "test")
Register(test{}, "test")
url, err := TypeUrl(&test{})
url, err := TypeURL(&test{})
if err != nil {
t.Fatal(err)
}
@ -45,10 +49,10 @@ func TestRegsiterValueGetPointer(t *testing.T) {
func TestRegsiterPointerGetPointer(t *testing.T) {
clear()
expected := filepath.Join(Namespace, "test")
expected := filepath.Join(Prefix, "test")
Register(&test{}, "test")
url, err := TypeUrl(&test{})
url, err := TypeURL(&test{})
if err != nil {
t.Fatal(err)
}
@ -59,10 +63,10 @@ func TestRegsiterPointerGetPointer(t *testing.T) {
func TestRegsiterPointerGetValue(t *testing.T) {
clear()
expected := filepath.Join(Namespace, "test")
expected := filepath.Join(Prefix, "test")
Register(&test{}, "test")
url, err := TypeUrl(test{})
url, err := TypeURL(test{})
if err != nil {
t.Fatal(err)
}
@ -73,7 +77,7 @@ func TestRegsiterPointerGetValue(t *testing.T) {
func TestMarshal(t *testing.T) {
clear()
expected := filepath.Join(Namespace, "test")
expected := filepath.Join(Prefix, "test")
Register(test{}, "test")
v := &test{
@ -116,3 +120,55 @@ func TestMarshalUnmarshal(t *testing.T) {
t.Fatal("invalid age")
}
}
func TestMarshalEvent(t *testing.T) {
for _, testcase := range []struct {
event events.Event
url string
}{
{
event: &eventsapi.TaskStart{},
url: "types.containerd.io/containerd.services.events.v1.TaskStart",
},
{
event: &eventsapi.NamespaceUpdate{},
url: "types.containerd.io/containerd.services.events.v1.NamespaceUpdate",
},
} {
t.Run(fmt.Sprintf("%T", testcase.event), func(t *testing.T) {
a, err := MarshalAny(testcase.event)
if err != nil {
t.Fatal(err)
}
if a.TypeUrl != testcase.url {
t.Fatalf("unexpected url: %v != %v", a.TypeUrl, testcase.url)
}
v, err := UnmarshalAny(a)
if err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(v, testcase.event) {
t.Fatalf("round trip failed %v != %v", v, testcase.event)
}
})
}
}
func BenchmarkMarshalEvent(b *testing.B) {
ev := &eventsapi.TaskStart{}
expected, err := MarshalAny(ev)
if err != nil {
b.Fatal(err)
}
for i := 0; i < b.N; i++ {
a, err := MarshalAny(ev)
if err != nil {
b.Fatal(err)
}
if a.TypeUrl != expected.TypeUrl {
b.Fatalf("incorrect type url: %v != %v", a, expected)
}
}
}