api/services: define the introspection API

After several requests for information about platform support,
configuration introspection and feature switches, we now have a solution
that should work in all these use cases. The Introspection API hooks
into the plugin subsystem registration process. During registration,
plugins declare several pieces of information, allowing clients to
discover the cababilities and support that a containerd instance
provides, including whether or not it loaded with an error.

To allow symmetrical error reporting, the `google/rpc.Status` protobuf
definitions have been brought in from the googleapis project.
Unfortunately, we had to generate these in place to match our protobuf
system.

Once we like this design, we can add an implementation to integrate it
directly with the plugin system.

Enjoy!

Signed-off-by: Stephen J Day <stephen.day@docker.com>
This commit is contained in:
Stephen J Day
2017-10-04 16:48:20 -07:00
parent 12c79cc0d9
commit 363d692f35
18 changed files with 5678 additions and 5 deletions

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@@ -9,11 +9,13 @@
github.com/containerd/containerd/api/types/descriptor.proto
github.com/containerd/containerd/api/types/metrics.proto
github.com/containerd/containerd/api/types/mount.proto
github.com/containerd/containerd/api/types/platform.proto
It has these top-level messages:
Descriptor
Metric
Mount
Platform
*/
package types

412
api/types/platform.pb.go Normal file
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@@ -0,0 +1,412 @@
// Code generated by protoc-gen-gogo.
// source: github.com/containerd/containerd/api/types/platform.proto
// DO NOT EDIT!
package types
import proto "github.com/gogo/protobuf/proto"
import fmt "fmt"
import math "math"
import _ "github.com/gogo/protobuf/gogoproto"
import strings "strings"
import reflect "reflect"
import io "io"
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf
// Platform follows the structure of the OCI platform specification, from
// descriptors.
type Platform struct {
OS string `protobuf:"bytes,1,opt,name=os,proto3" json:"os,omitempty"`
Architecture string `protobuf:"bytes,2,opt,name=architecture,proto3" json:"architecture,omitempty"`
Variant string `protobuf:"bytes,3,opt,name=variant,proto3" json:"variant,omitempty"`
}
func (m *Platform) Reset() { *m = Platform{} }
func (*Platform) ProtoMessage() {}
func (*Platform) Descriptor() ([]byte, []int) { return fileDescriptorPlatform, []int{0} }
func init() {
proto.RegisterType((*Platform)(nil), "containerd.types.Platform")
}
func (m *Platform) Marshal() (dAtA []byte, err error) {
size := m.Size()
dAtA = make([]byte, size)
n, err := m.MarshalTo(dAtA)
if err != nil {
return nil, err
}
return dAtA[:n], nil
}
func (m *Platform) MarshalTo(dAtA []byte) (int, error) {
var i int
_ = i
var l int
_ = l
if len(m.OS) > 0 {
dAtA[i] = 0xa
i++
i = encodeVarintPlatform(dAtA, i, uint64(len(m.OS)))
i += copy(dAtA[i:], m.OS)
}
if len(m.Architecture) > 0 {
dAtA[i] = 0x12
i++
i = encodeVarintPlatform(dAtA, i, uint64(len(m.Architecture)))
i += copy(dAtA[i:], m.Architecture)
}
if len(m.Variant) > 0 {
dAtA[i] = 0x1a
i++
i = encodeVarintPlatform(dAtA, i, uint64(len(m.Variant)))
i += copy(dAtA[i:], m.Variant)
}
return i, nil
}
func encodeFixed64Platform(dAtA []byte, offset int, v uint64) int {
dAtA[offset] = uint8(v)
dAtA[offset+1] = uint8(v >> 8)
dAtA[offset+2] = uint8(v >> 16)
dAtA[offset+3] = uint8(v >> 24)
dAtA[offset+4] = uint8(v >> 32)
dAtA[offset+5] = uint8(v >> 40)
dAtA[offset+6] = uint8(v >> 48)
dAtA[offset+7] = uint8(v >> 56)
return offset + 8
}
func encodeFixed32Platform(dAtA []byte, offset int, v uint32) int {
dAtA[offset] = uint8(v)
dAtA[offset+1] = uint8(v >> 8)
dAtA[offset+2] = uint8(v >> 16)
dAtA[offset+3] = uint8(v >> 24)
return offset + 4
}
func encodeVarintPlatform(dAtA []byte, offset int, v uint64) int {
for v >= 1<<7 {
dAtA[offset] = uint8(v&0x7f | 0x80)
v >>= 7
offset++
}
dAtA[offset] = uint8(v)
return offset + 1
}
func (m *Platform) Size() (n int) {
var l int
_ = l
l = len(m.OS)
if l > 0 {
n += 1 + l + sovPlatform(uint64(l))
}
l = len(m.Architecture)
if l > 0 {
n += 1 + l + sovPlatform(uint64(l))
}
l = len(m.Variant)
if l > 0 {
n += 1 + l + sovPlatform(uint64(l))
}
return n
}
func sovPlatform(x uint64) (n int) {
for {
n++
x >>= 7
if x == 0 {
break
}
}
return n
}
func sozPlatform(x uint64) (n int) {
return sovPlatform(uint64((x << 1) ^ uint64((int64(x) >> 63))))
}
func (this *Platform) String() string {
if this == nil {
return "nil"
}
s := strings.Join([]string{`&Platform{`,
`OS:` + fmt.Sprintf("%v", this.OS) + `,`,
`Architecture:` + fmt.Sprintf("%v", this.Architecture) + `,`,
`Variant:` + fmt.Sprintf("%v", this.Variant) + `,`,
`}`,
}, "")
return s
}
func valueToStringPlatform(v interface{}) string {
rv := reflect.ValueOf(v)
if rv.IsNil() {
return "nil"
}
pv := reflect.Indirect(rv).Interface()
return fmt.Sprintf("*%v", pv)
}
func (m *Platform) Unmarshal(dAtA []byte) error {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
preIndex := iNdEx
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowPlatform
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
fieldNum := int32(wire >> 3)
wireType := int(wire & 0x7)
if wireType == 4 {
return fmt.Errorf("proto: Platform: wiretype end group for non-group")
}
if fieldNum <= 0 {
return fmt.Errorf("proto: Platform: illegal tag %d (wire type %d)", fieldNum, wire)
}
switch fieldNum {
case 1:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field OS", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowPlatform
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLen |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthPlatform
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.OS = string(dAtA[iNdEx:postIndex])
iNdEx = postIndex
case 2:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Architecture", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowPlatform
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLen |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthPlatform
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Architecture = string(dAtA[iNdEx:postIndex])
iNdEx = postIndex
case 3:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Variant", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowPlatform
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
stringLen |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
intStringLen := int(stringLen)
if intStringLen < 0 {
return ErrInvalidLengthPlatform
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Variant = string(dAtA[iNdEx:postIndex])
iNdEx = postIndex
default:
iNdEx = preIndex
skippy, err := skipPlatform(dAtA[iNdEx:])
if err != nil {
return err
}
if skippy < 0 {
return ErrInvalidLengthPlatform
}
if (iNdEx + skippy) > l {
return io.ErrUnexpectedEOF
}
iNdEx += skippy
}
}
if iNdEx > l {
return io.ErrUnexpectedEOF
}
return nil
}
func skipPlatform(dAtA []byte) (n int, err error) {
l := len(dAtA)
iNdEx := 0
for iNdEx < l {
var wire uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowPlatform
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
wire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
wireType := int(wire & 0x7)
switch wireType {
case 0:
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowPlatform
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
iNdEx++
if dAtA[iNdEx-1] < 0x80 {
break
}
}
return iNdEx, nil
case 1:
iNdEx += 8
return iNdEx, nil
case 2:
var length int
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowPlatform
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
length |= (int(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
iNdEx += length
if length < 0 {
return 0, ErrInvalidLengthPlatform
}
return iNdEx, nil
case 3:
for {
var innerWire uint64
var start int = iNdEx
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return 0, ErrIntOverflowPlatform
}
if iNdEx >= l {
return 0, io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
innerWire |= (uint64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
innerWireType := int(innerWire & 0x7)
if innerWireType == 4 {
break
}
next, err := skipPlatform(dAtA[start:])
if err != nil {
return 0, err
}
iNdEx = start + next
}
return iNdEx, nil
case 4:
return iNdEx, nil
case 5:
iNdEx += 4
return iNdEx, nil
default:
return 0, fmt.Errorf("proto: illegal wireType %d", wireType)
}
}
panic("unreachable")
}
var (
ErrInvalidLengthPlatform = fmt.Errorf("proto: negative length found during unmarshaling")
ErrIntOverflowPlatform = fmt.Errorf("proto: integer overflow")
)
func init() {
proto.RegisterFile("github.com/containerd/containerd/api/types/platform.proto", fileDescriptorPlatform)
}
var fileDescriptorPlatform = []byte{
// 203 bytes of a gzipped FileDescriptorProto
0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xe2, 0xb2, 0x4c, 0xcf, 0x2c, 0xc9,
0x28, 0x4d, 0xd2, 0x4b, 0xce, 0xcf, 0xd5, 0x4f, 0xce, 0xcf, 0x2b, 0x49, 0xcc, 0xcc, 0x4b, 0x2d,
0x4a, 0x41, 0x66, 0x26, 0x16, 0x64, 0xea, 0x97, 0x54, 0x16, 0xa4, 0x16, 0xeb, 0x17, 0xe4, 0x24,
0x96, 0xa4, 0xe5, 0x17, 0xe5, 0xea, 0x15, 0x14, 0xe5, 0x97, 0xe4, 0x0b, 0x09, 0x20, 0x14, 0xe9,
0x81, 0x15, 0x48, 0x89, 0xa4, 0xe7, 0xa7, 0xe7, 0x83, 0x25, 0xf5, 0x41, 0x2c, 0x88, 0x3a, 0xa5,
0x04, 0x2e, 0x8e, 0x00, 0xa8, 0x4e, 0x21, 0x31, 0x2e, 0xa6, 0xfc, 0x62, 0x09, 0x46, 0x05, 0x46,
0x0d, 0x4e, 0x27, 0xb6, 0x47, 0xf7, 0xe4, 0x99, 0xfc, 0x83, 0x83, 0x98, 0xf2, 0x8b, 0x85, 0x94,
0xb8, 0x78, 0x12, 0x8b, 0x92, 0x33, 0x32, 0x4b, 0x52, 0x93, 0x4b, 0x4a, 0x8b, 0x52, 0x25, 0x98,
0x40, 0x2a, 0x82, 0x50, 0xc4, 0x84, 0x24, 0xb8, 0xd8, 0xcb, 0x12, 0x8b, 0x32, 0x13, 0xf3, 0x4a,
0x24, 0x98, 0xc1, 0xd2, 0x30, 0xae, 0x93, 0xd7, 0x89, 0x87, 0x72, 0x0c, 0x37, 0x1e, 0xca, 0x31,
0x34, 0x3c, 0x92, 0x63, 0x3c, 0xf1, 0x48, 0x8e, 0xf1, 0xc2, 0x23, 0x39, 0xc6, 0x07, 0x8f, 0xe4,
0x18, 0xa3, 0x0c, 0x88, 0xf7, 0x9e, 0x35, 0x98, 0x4c, 0x62, 0x03, 0x3b, 0xda, 0x18, 0x10, 0x00,
0x00, 0xff, 0xff, 0x97, 0xa1, 0x99, 0x56, 0x19, 0x01, 0x00, 0x00,
}

15
api/types/platform.proto Normal file
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@@ -0,0 +1,15 @@
syntax = "proto3";
package containerd.types;
import "gogoproto/gogo.proto";
option go_package = "github.com/containerd/containerd/api/types;types";
// Platform follows the structure of the OCI platform specification, from
// descriptors.
message Platform {
string os = 1 [(gogoproto.customname) = "OS"];
string architecture = 2;
string variant = 3;
}