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Merge pull request #559 from stevvooe/content-service-cleanup 

content: cleanup service and interfaces
This commit is contained in:
Michael Crosby 2017-02-22 13:35:36 -08:00 committed by GitHub
parent 0a5544d8c4 c062a85782
commit 4bce28a4a5
15 changed files with 568 additions and 337 deletions
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505
api/services/content/content.pb.go
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@ -165,25 +165,26 @@ type WriteRequest struct {
Action WriteAction `protobuf:"varint,1,opt,name=action,proto3,enum=containerd.v1.WriteAction" json:"action,omitempty"` Action WriteAction `protobuf:"varint,1,opt,name=action,proto3,enum=containerd.v1.WriteAction" json:"action,omitempty"`
// Ref identifies the pre-commit object to write to. // Ref identifies the pre-commit object to write to.
Ref string `protobuf:"bytes,2,opt,name=ref,proto3" json:"ref,omitempty"` Ref string `protobuf:"bytes,2,opt,name=ref,proto3" json:"ref,omitempty"`
// ExpectedSize can be set to have the service validate the total size of // Total can be set to have the service validate the total size of the
// the of committed content. // committed content.
// //
// The latest value before or with the commit action message will be use to // The latest value before or with the commit action message will be use to
// validate the content. It is only required on one message for the write. // validate the content. If the offset overflows total, the service may
// report an error. It is only required on one message for the write.
// //
// If the value is zero or less, no validation of the final content will be // If the value is zero or less, no validation of the final content will be
// performed. // performed.
ExpectedSize int64 `protobuf:"varint,3,opt,name=expected_size,json=expectedSize,proto3" json:"expected_size,omitempty"` Total int64 `protobuf:"varint,3,opt,name=total,proto3" json:"total,omitempty"`
// ExpectedDigest can be set to have the service validate the final content // Expected can be set to have the service validate the final content against
// against the provided digest. // the provided digest.
// //
// If the digest is already present in the object store, an AlreadyPresent // If the digest is already present in the object store, an AlreadyExists
// error will be returned. // error will be returned.
// //
// Only the latest version will be used to check the content against the // Only the latest version will be used to check the content against the
// digest. It is only required to include it on a single message, before or // digest. It is only required to include it on a single message, before or
// with the commit action message. // with the commit action message.
ExpectedDigest github_com_opencontainers_go_digest.Digest `protobuf:"bytes,4,opt,name=expected_digest,json=expectedDigest,proto3,customtype=github.com/opencontainers/go-digest.Digest" json:"expected_digest"` Expected github_com_opencontainers_go_digest.Digest `protobuf:"bytes,4,opt,name=expected,proto3,customtype=github.com/opencontainers/go-digest.Digest" json:"expected"`
// Offset specifies the number of bytes from the start at which to begin // Offset specifies the number of bytes from the start at which to begin
// the write. If zero or less, the write will be from the start. This uses // the write. If zero or less, the write will be from the start. This uses
// standard zero-indexed semantics. // standard zero-indexed semantics.
@ -204,17 +205,30 @@ type WriteResponse struct {
// Action contains the action for the final message of the stream. A writer // Action contains the action for the final message of the stream. A writer
// should confirm that they match the intended result. // should confirm that they match the intended result.
Action WriteAction `protobuf:"varint,1,opt,name=action,proto3,enum=containerd.v1.WriteAction" json:"action,omitempty"` Action WriteAction `protobuf:"varint,1,opt,name=action,proto3,enum=containerd.v1.WriteAction" json:"action,omitempty"`
// Offset provides the current "committed" size for the Write. // StartedAt provides the time at which the write began.
Offset int64 `protobuf:"varint,2,opt,name=offset,proto3" json:"offset,omitempty"` //
// This must be set for stat and commit write actions. All other write
// actions may omit this.
StartedAt time.Time `protobuf:"bytes,2,opt,name=started_at,json=startedAt,stdtime" json:"started_at"`
// UpdatedAt provides the last time of a successful write.
//
// This must be set for stat and commit write actions. All other write
// actions may omit this.
UpdatedAt time.Time `protobuf:"bytes,3,opt,name=updated_at,json=updatedAt,stdtime" json:"updated_at"`
// Offset is the current committed size for the write.
Offset int64 `protobuf:"varint,4,opt,name=offset,proto3" json:"offset,omitempty"`
// Total provides the current, expected total size of the write.
//
// We include this to provide consistency with the Status structure on the
// client writer.
//
// This is only valid on the Stat and Commit response.
Total int64 `protobuf:"varint,5,opt,name=total,proto3" json:"total,omitempty"`
// Digest, if present, includes the digest up to the currently committed // Digest, if present, includes the digest up to the currently committed
// bytes. If action is commit, this field will be set. It is implementation // bytes. If action is commit, this field will be set. It is implementation
// defined if this is set for other actions, except abort. On abort, this // defined if this is set for other actions, except abort. On abort, this
// will be empty. // will be empty.
Digest github_com_opencontainers_go_digest.Digest `protobuf:"bytes,3,opt,name=digest,proto3,customtype=github.com/opencontainers/go-digest.Digest" json:"digest"` Digest github_com_opencontainers_go_digest.Digest `protobuf:"bytes,6,opt,name=digest,proto3,customtype=github.com/opencontainers/go-digest.Digest" json:"digest"`
// StartedAt is the time at which the write first started.
StartedAt time.Time `protobuf:"bytes,4,opt,name=started_at,json=startedAt,stdtime" json:"started_at"`
// UpdatedAt is the time the write was last updated.
UpdatedAt time.Time `protobuf:"bytes,5,opt,name=updated_at,json=updatedAt,stdtime" json:"updated_at"`
} }
func (m *WriteResponse) Reset() { *m = WriteResponse{} } func (m *WriteResponse) Reset() { *m = WriteResponse{} }
@ -231,10 +245,11 @@ func (*StatusRequest) ProtoMessage() {}
func (*StatusRequest) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{6} } func (*StatusRequest) Descriptor() ([]byte, []int) { return fileDescriptorContent, []int{6} }
type StatusResponse struct { type StatusResponse struct {
Ref string `protobuf:"bytes,1,opt,name=ref,proto3" json:"ref,omitempty"` StartedAt time.Time `protobuf:"bytes,1,opt,name=started_at,json=startedAt,stdtime" json:"started_at"`
Offset int64 `protobuf:"varint,2,opt,name=offset,proto3" json:"offset,omitempty"` UpdatedAt time.Time `protobuf:"bytes,2,opt,name=updated_at,json=updatedAt,stdtime" json:"updated_at"`
StartedAt time.Time `protobuf:"bytes,3,opt,name=started_at,json=startedAt,stdtime" json:"started_at"` Ref string `protobuf:"bytes,3,opt,name=ref,proto3" json:"ref,omitempty"`
UpdatedAt time.Time `protobuf:"bytes,4,opt,name=updated_at,json=updatedAt,stdtime" json:"updated_at"` Offset int64 `protobuf:"varint,4,opt,name=offset,proto3" json:"offset,omitempty"`
Total int64 `protobuf:"varint,5,opt,name=total,proto3" json:"total,omitempty"`
} }
func (m *StatusResponse) Reset() { *m = StatusResponse{} } func (m *StatusResponse) Reset() { *m = StatusResponse{} }
@ -717,16 +732,16 @@ func (m *WriteRequest) MarshalTo(dAtA []byte) (int, error) {
i = encodeVarintContent(dAtA, i, uint64(len(m.Ref))) i = encodeVarintContent(dAtA, i, uint64(len(m.Ref)))
i += copy(dAtA[i:], m.Ref) i += copy(dAtA[i:], m.Ref)
} }
if m.ExpectedSize != 0 { if m.Total != 0 {
dAtA[i] = 0x18 dAtA[i] = 0x18
i++ i++
i = encodeVarintContent(dAtA, i, uint64(m.ExpectedSize)) i = encodeVarintContent(dAtA, i, uint64(m.Total))
} }
if len(m.ExpectedDigest) > 0 { if len(m.Expected) > 0 {
dAtA[i] = 0x22 dAtA[i] = 0x22
i++ i++
i = encodeVarintContent(dAtA, i, uint64(len(m.ExpectedDigest))) i = encodeVarintContent(dAtA, i, uint64(len(m.Expected)))
i += copy(dAtA[i:], m.ExpectedDigest) i += copy(dAtA[i:], m.Expected)
} }
if m.Offset != 0 { if m.Offset != 0 {
dAtA[i] = 0x28 dAtA[i] = 0x28
@ -762,18 +777,7 @@ func (m *WriteResponse) MarshalTo(dAtA []byte) (int, error) {
i++ i++
i = encodeVarintContent(dAtA, i, uint64(m.Action)) i = encodeVarintContent(dAtA, i, uint64(m.Action))
} }
if m.Offset != 0 { dAtA[i] = 0x12
dAtA[i] = 0x10
i++
i = encodeVarintContent(dAtA, i, uint64(m.Offset))
}
if len(m.Digest) > 0 {
dAtA[i] = 0x1a
i++
i = encodeVarintContent(dAtA, i, uint64(len(m.Digest)))
i += copy(dAtA[i:], m.Digest)
}
dAtA[i] = 0x22
i++ i++
i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt))) i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt)))
n2, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.StartedAt, dAtA[i:]) n2, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.StartedAt, dAtA[i:])
@ -781,7 +785,7 @@ func (m *WriteResponse) MarshalTo(dAtA []byte) (int, error) {
return 0, err return 0, err
} }
i += n2 i += n2
dAtA[i] = 0x2a dAtA[i] = 0x1a
i++ i++
i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt))) i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)))
n3, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:]) n3, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
@ -789,6 +793,22 @@ func (m *WriteResponse) MarshalTo(dAtA []byte) (int, error) {
return 0, err return 0, err
} }
i += n3 i += n3
if m.Offset != 0 {
dAtA[i] = 0x20
i++
i = encodeVarintContent(dAtA, i, uint64(m.Offset))
}
if m.Total != 0 {
dAtA[i] = 0x28
i++
i = encodeVarintContent(dAtA, i, uint64(m.Total))
}
if len(m.Digest) > 0 {
dAtA[i] = 0x32
i++
i = encodeVarintContent(dAtA, i, uint64(len(m.Digest)))
i += copy(dAtA[i:], m.Digest)
}
return i, nil return i, nil
} }
@ -855,18 +875,7 @@ func (m *StatusResponse) MarshalTo(dAtA []byte) (int, error) {
_ = i _ = i
var l int var l int
_ = l _ = l
if len(m.Ref) > 0 { dAtA[i] = 0xa
dAtA[i] = 0xa
i++
i = encodeVarintContent(dAtA, i, uint64(len(m.Ref)))
i += copy(dAtA[i:], m.Ref)
}
if m.Offset != 0 {
dAtA[i] = 0x10
i++
i = encodeVarintContent(dAtA, i, uint64(m.Offset))
}
dAtA[i] = 0x1a
i++ i++
i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt))) i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt)))
n4, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.StartedAt, dAtA[i:]) n4, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.StartedAt, dAtA[i:])
@ -874,7 +883,7 @@ func (m *StatusResponse) MarshalTo(dAtA []byte) (int, error) {
return 0, err return 0, err
} }
i += n4 i += n4
dAtA[i] = 0x22 dAtA[i] = 0x12
i++ i++
i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt))) i = encodeVarintContent(dAtA, i, uint64(github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)))
n5, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:]) n5, err := github_com_gogo_protobuf_types.StdTimeMarshalTo(m.UpdatedAt, dAtA[i:])
@ -882,6 +891,22 @@ func (m *StatusResponse) MarshalTo(dAtA []byte) (int, error) {
return 0, err return 0, err
} }
i += n5 i += n5
if len(m.Ref) > 0 {
dAtA[i] = 0x1a
i++
i = encodeVarintContent(dAtA, i, uint64(len(m.Ref)))
i += copy(dAtA[i:], m.Ref)
}
if m.Offset != 0 {
dAtA[i] = 0x20
i++
i = encodeVarintContent(dAtA, i, uint64(m.Offset))
}
if m.Total != 0 {
dAtA[i] = 0x28
i++
i = encodeVarintContent(dAtA, i, uint64(m.Total))
}
return i, nil return i, nil
} }
@ -976,10 +1001,10 @@ func (m *WriteRequest) Size() (n int) {
if l > 0 { if l > 0 {
n += 1 + l + sovContent(uint64(l)) n += 1 + l + sovContent(uint64(l))
} }
if m.ExpectedSize != 0 { if m.Total != 0 {
n += 1 + sovContent(uint64(m.ExpectedSize)) n += 1 + sovContent(uint64(m.Total))
} }
l = len(m.ExpectedDigest) l = len(m.Expected)
if l > 0 { if l > 0 {
n += 1 + l + sovContent(uint64(l)) n += 1 + l + sovContent(uint64(l))
} }
@ -999,17 +1024,20 @@ func (m *WriteResponse) Size() (n int) {
if m.Action != 0 { if m.Action != 0 {
n += 1 + sovContent(uint64(m.Action)) n += 1 + sovContent(uint64(m.Action))
} }
l = github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt)
n += 1 + l + sovContent(uint64(l))
l = github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)
n += 1 + l + sovContent(uint64(l))
if m.Offset != 0 { if m.Offset != 0 {
n += 1 + sovContent(uint64(m.Offset)) n += 1 + sovContent(uint64(m.Offset))
} }
if m.Total != 0 {
n += 1 + sovContent(uint64(m.Total))
}
l = len(m.Digest) l = len(m.Digest)
if l > 0 { if l > 0 {
n += 1 + l + sovContent(uint64(l)) n += 1 + l + sovContent(uint64(l))
} }
l = github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt)
n += 1 + l + sovContent(uint64(l))
l = github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)
n += 1 + l + sovContent(uint64(l))
return n return n
} }
@ -1034,6 +1062,10 @@ func (m *StatusRequest) Size() (n int) {
func (m *StatusResponse) Size() (n int) { func (m *StatusResponse) Size() (n int) {
var l int var l int
_ = l _ = l
l = github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt)
n += 1 + l + sovContent(uint64(l))
l = github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt)
n += 1 + l + sovContent(uint64(l))
l = len(m.Ref) l = len(m.Ref)
if l > 0 { if l > 0 {
n += 1 + l + sovContent(uint64(l)) n += 1 + l + sovContent(uint64(l))
@ -1041,10 +1073,9 @@ func (m *StatusResponse) Size() (n int) {
if m.Offset != 0 { if m.Offset != 0 {
n += 1 + sovContent(uint64(m.Offset)) n += 1 + sovContent(uint64(m.Offset))
} }
l = github_com_gogo_protobuf_types.SizeOfStdTime(m.StartedAt) if m.Total != 0 {
n += 1 + l + sovContent(uint64(l)) n += 1 + sovContent(uint64(m.Total))
l = github_com_gogo_protobuf_types.SizeOfStdTime(m.UpdatedAt) }
n += 1 + l + sovContent(uint64(l))
return n return n
} }
@ -1113,8 +1144,8 @@ func (this *WriteRequest) String() string {
s := strings.Join([]string{`&WriteRequest{`, s := strings.Join([]string{`&WriteRequest{`,
`Action:` + fmt.Sprintf("%v", this.Action) + `,`, `Action:` + fmt.Sprintf("%v", this.Action) + `,`,
`Ref:` + fmt.Sprintf("%v", this.Ref) + `,`, `Ref:` + fmt.Sprintf("%v", this.Ref) + `,`,
`ExpectedSize:` + fmt.Sprintf("%v", this.ExpectedSize) + `,`, `Total:` + fmt.Sprintf("%v", this.Total) + `,`,
`ExpectedDigest:` + fmt.Sprintf("%v", this.ExpectedDigest) + `,`, `Expected:` + fmt.Sprintf("%v", this.Expected) + `,`,
`Offset:` + fmt.Sprintf("%v", this.Offset) + `,`, `Offset:` + fmt.Sprintf("%v", this.Offset) + `,`,
`Data:` + fmt.Sprintf("%v", this.Data) + `,`, `Data:` + fmt.Sprintf("%v", this.Data) + `,`,
`}`, `}`,
@ -1127,10 +1158,11 @@ func (this *WriteResponse) String() string {
} }
s := strings.Join([]string{`&WriteResponse{`, s := strings.Join([]string{`&WriteResponse{`,
`Action:` + fmt.Sprintf("%v", this.Action) + `,`, `Action:` + fmt.Sprintf("%v", this.Action) + `,`,
`Offset:` + fmt.Sprintf("%v", this.Offset) + `,`,
`Digest:` + fmt.Sprintf("%v", this.Digest) + `,`,
`StartedAt:` + strings.Replace(strings.Replace(this.StartedAt.String(), "Timestamp", "google_protobuf1.Timestamp", 1), `&`, ``, 1) + `,`, `StartedAt:` + strings.Replace(strings.Replace(this.StartedAt.String(), "Timestamp", "google_protobuf1.Timestamp", 1), `&`, ``, 1) + `,`,
`UpdatedAt:` + strings.Replace(strings.Replace(this.UpdatedAt.String(), "Timestamp", "google_protobuf1.Timestamp", 1), `&`, ``, 1) + `,`, `UpdatedAt:` + strings.Replace(strings.Replace(this.UpdatedAt.String(), "Timestamp", "google_protobuf1.Timestamp", 1), `&`, ``, 1) + `,`,
`Offset:` + fmt.Sprintf("%v", this.Offset) + `,`,
`Total:` + fmt.Sprintf("%v", this.Total) + `,`,
`Digest:` + fmt.Sprintf("%v", this.Digest) + `,`,
`}`, `}`,
}, "") }, "")
return s return s
@ -1151,10 +1183,11 @@ func (this *StatusResponse) String() string {
return "nil" return "nil"
} }
s := strings.Join([]string{`&StatusResponse{`, s := strings.Join([]string{`&StatusResponse{`,
`Ref:` + fmt.Sprintf("%v", this.Ref) + `,`,
`Offset:` + fmt.Sprintf("%v", this.Offset) + `,`,
`StartedAt:` + strings.Replace(strings.Replace(this.StartedAt.String(), "Timestamp", "google_protobuf1.Timestamp", 1), `&`, ``, 1) + `,`, `StartedAt:` + strings.Replace(strings.Replace(this.StartedAt.String(), "Timestamp", "google_protobuf1.Timestamp", 1), `&`, ``, 1) + `,`,
`UpdatedAt:` + strings.Replace(strings.Replace(this.UpdatedAt.String(), "Timestamp", "google_protobuf1.Timestamp", 1), `&`, ``, 1) + `,`, `UpdatedAt:` + strings.Replace(strings.Replace(this.UpdatedAt.String(), "Timestamp", "google_protobuf1.Timestamp", 1), `&`, ``, 1) + `,`,
`Ref:` + fmt.Sprintf("%v", this.Ref) + `,`,
`Offset:` + fmt.Sprintf("%v", this.Offset) + `,`,
`Total:` + fmt.Sprintf("%v", this.Total) + `,`,
`}`, `}`,
}, "") }, "")
return s return s
@ -1670,9 +1703,9 @@ func (m *WriteRequest) Unmarshal(dAtA []byte) error {
iNdEx = postIndex iNdEx = postIndex
case 3: case 3:
if wireType != 0 { if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field ExpectedSize", wireType) return fmt.Errorf("proto: wrong wireType = %d for field Total", wireType)
} }
m.ExpectedSize = 0 m.Total = 0
for shift := uint(0); ; shift += 7 { for shift := uint(0); ; shift += 7 {
if shift >= 64 { if shift >= 64 {
return ErrIntOverflowContent return ErrIntOverflowContent
@ -1682,14 +1715,14 @@ func (m *WriteRequest) Unmarshal(dAtA []byte) error {
} }
b := dAtA[iNdEx] b := dAtA[iNdEx]
iNdEx++ iNdEx++
m.ExpectedSize |= (int64(b) & 0x7F) << shift m.Total |= (int64(b) & 0x7F) << shift
if b < 0x80 { if b < 0x80 {
break break
} }
} }
case 4: case 4:
if wireType != 2 { if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field ExpectedDigest", wireType) return fmt.Errorf("proto: wrong wireType = %d for field Expected", wireType)
} }
var stringLen uint64 var stringLen uint64
for shift := uint(0); ; shift += 7 { for shift := uint(0); ; shift += 7 {
@ -1714,7 +1747,7 @@ func (m *WriteRequest) Unmarshal(dAtA []byte) error {
if postIndex > l { if postIndex > l {
return io.ErrUnexpectedEOF return io.ErrUnexpectedEOF
} }
m.ExpectedDigest = github_com_opencontainers_go_digest.Digest(dAtA[iNdEx:postIndex]) m.Expected = github_com_opencontainers_go_digest.Digest(dAtA[iNdEx:postIndex])
iNdEx = postIndex iNdEx = postIndex
case 5: case 5:
if wireType != 0 { if wireType != 0 {
@ -1836,54 +1869,6 @@ func (m *WriteResponse) Unmarshal(dAtA []byte) error {
} }
} }
case 2: case 2:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Offset", wireType)
}
m.Offset = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowContent
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.Offset |= (int64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
case 3:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Digest", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowContent
}
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 ErrInvalidLengthContent
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Digest = github_com_opencontainers_go_digest.Digest(dAtA[iNdEx:postIndex])
iNdEx = postIndex
case 4:
if wireType != 2 { if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field StartedAt", wireType) return fmt.Errorf("proto: wrong wireType = %d for field StartedAt", wireType)
} }
@ -1913,7 +1898,7 @@ func (m *WriteResponse) Unmarshal(dAtA []byte) error {
return err return err
} }
iNdEx = postIndex iNdEx = postIndex
case 5: case 3:
if wireType != 2 { if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field UpdatedAt", wireType) return fmt.Errorf("proto: wrong wireType = %d for field UpdatedAt", wireType)
} }
@ -1943,6 +1928,73 @@ func (m *WriteResponse) Unmarshal(dAtA []byte) error {
return err return err
} }
iNdEx = postIndex iNdEx = postIndex
case 4:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Offset", wireType)
}
m.Offset = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowContent
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.Offset |= (int64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
case 5:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Total", wireType)
}
m.Total = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowContent
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.Total |= (int64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
case 6:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Digest", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowContent
}
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 ErrInvalidLengthContent
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Digest = github_com_opencontainers_go_digest.Digest(dAtA[iNdEx:postIndex])
iNdEx = postIndex
default: default:
iNdEx = preIndex iNdEx = preIndex
skippy, err := skipContent(dAtA[iNdEx:]) skippy, err := skipContent(dAtA[iNdEx:])
@ -2102,54 +2154,6 @@ func (m *StatusResponse) Unmarshal(dAtA []byte) error {
} }
switch fieldNum { switch fieldNum {
case 1: case 1:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Ref", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowContent
}
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 ErrInvalidLengthContent
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Ref = string(dAtA[iNdEx:postIndex])
iNdEx = postIndex
case 2:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Offset", wireType)
}
m.Offset = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowContent
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.Offset |= (int64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
case 3:
if wireType != 2 { if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field StartedAt", wireType) return fmt.Errorf("proto: wrong wireType = %d for field StartedAt", wireType)
} }
@ -2179,7 +2183,7 @@ func (m *StatusResponse) Unmarshal(dAtA []byte) error {
return err return err
} }
iNdEx = postIndex iNdEx = postIndex
case 4: case 2:
if wireType != 2 { if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field UpdatedAt", wireType) return fmt.Errorf("proto: wrong wireType = %d for field UpdatedAt", wireType)
} }
@ -2209,6 +2213,73 @@ func (m *StatusResponse) Unmarshal(dAtA []byte) error {
return err return err
} }
iNdEx = postIndex iNdEx = postIndex
case 3:
if wireType != 2 {
return fmt.Errorf("proto: wrong wireType = %d for field Ref", wireType)
}
var stringLen uint64
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowContent
}
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 ErrInvalidLengthContent
}
postIndex := iNdEx + intStringLen
if postIndex > l {
return io.ErrUnexpectedEOF
}
m.Ref = string(dAtA[iNdEx:postIndex])
iNdEx = postIndex
case 4:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Offset", wireType)
}
m.Offset = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowContent
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.Offset |= (int64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
case 5:
if wireType != 0 {
return fmt.Errorf("proto: wrong wireType = %d for field Total", wireType)
}
m.Total = 0
for shift := uint(0); ; shift += 7 {
if shift >= 64 {
return ErrIntOverflowContent
}
if iNdEx >= l {
return io.ErrUnexpectedEOF
}
b := dAtA[iNdEx]
iNdEx++
m.Total |= (int64(b) & 0x7F) << shift
if b < 0x80 {
break
}
}
default: default:
iNdEx = preIndex iNdEx = preIndex
skippy, err := skipContent(dAtA[iNdEx:]) skippy, err := skipContent(dAtA[iNdEx:])
@ -2340,51 +2411,51 @@ func init() {
} }
var fileDescriptorContent = []byte{ var fileDescriptorContent = []byte{
// 733 bytes of a gzipped FileDescriptorProto // 734 bytes of a gzipped FileDescriptorProto
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} }

58
api/services/content/content.proto
View File

@ -133,26 +133,27 @@ message WriteRequest {
// Ref identifies the pre-commit object to write to. // Ref identifies the pre-commit object to write to.
string ref = 2; string ref = 2;
// ExpectedSize can be set to have the service validate the total size of // Total can be set to have the service validate the total size of the
// the of committed content. // committed content.
// //
// The latest value before or with the commit action message will be use to // The latest value before or with the commit action message will be use to
// validate the content. It is only required on one message for the write. // validate the content. If the offset overflows total, the service may
// report an error. It is only required on one message for the write.
// //
// If the value is zero or less, no validation of the final content will be // If the value is zero or less, no validation of the final content will be
// performed. // performed.
int64 expected_size = 3; int64 total = 3;
// ExpectedDigest can be set to have the service validate the final content // Expected can be set to have the service validate the final content against
// against the provided digest. // the provided digest.
// //
// If the digest is already present in the object store, an AlreadyPresent // If the digest is already present in the object store, an AlreadyExists
// error will be returned. // error will be returned.
// //
// Only the latest version will be used to check the content against the // Only the latest version will be used to check the content against the
// digest. It is only required to include it on a single message, before or // digest. It is only required to include it on a single message, before or
// with the commit action message. // with the commit action message.
string expected_digest = 4 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false]; string expected = 4 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false];
// Offset specifies the number of bytes from the start at which to begin // Offset specifies the number of bytes from the start at which to begin
// the write. If zero or less, the write will be from the start. This uses // the write. If zero or less, the write will be from the start. This uses
@ -172,20 +173,34 @@ message WriteResponse {
// should confirm that they match the intended result. // should confirm that they match the intended result.
WriteAction action = 1; WriteAction action = 1;
// Offset provides the current "committed" size for the Write. // StartedAt provides the time at which the write began.
int64 offset = 2; //
// This must be set for stat and commit write actions. All other write
// actions may omit this.
google.protobuf.Timestamp started_at = 2 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
// UpdatedAt provides the last time of a successful write.
//
// This must be set for stat and commit write actions. All other write
// actions may omit this.
google.protobuf.Timestamp updated_at = 3 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
// Offset is the current committed size for the write.
int64 offset = 4;
// Total provides the current, expected total size of the write.
//
// We include this to provide consistency with the Status structure on the
// client writer.
//
// This is only valid on the Stat and Commit response.
int64 total = 5;
// Digest, if present, includes the digest up to the currently committed // Digest, if present, includes the digest up to the currently committed
// bytes. If action is commit, this field will be set. It is implementation // bytes. If action is commit, this field will be set. It is implementation
// defined if this is set for other actions, except abort. On abort, this // defined if this is set for other actions, except abort. On abort, this
// will be empty. // will be empty.
string digest = 3 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false]; string digest = 6 [(gogoproto.customtype) = "github.com/opencontainers/go-digest.Digest", (gogoproto.nullable) = false];
// StartedAt is the time at which the write first started.
google.protobuf.Timestamp started_at = 4 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
// UpdatedAt is the time the write was last updated.
google.protobuf.Timestamp updated_at = 5 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
} }
message StatusRequest { message StatusRequest {
@ -194,8 +209,9 @@ message StatusRequest {
} }
message StatusResponse { message StatusResponse {
string ref = 1; google.protobuf.Timestamp started_at = 1 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
int64 offset = 2; google.protobuf.Timestamp updated_at = 2 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
google.protobuf.Timestamp started_at = 3 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false]; string ref = 3;
google.protobuf.Timestamp updated_at = 4 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false]; int64 offset = 4;
int64 total = 5;
} }

2
cmd/dist/common.go vendored
View File

@ -11,7 +11,7 @@ import (
) )
func resolveContentStore(context *cli.Context) (*content.Store, error) { func resolveContentStore(context *cli.Context) (*content.Store, error) {
root := context.GlobalString("root") root := filepath.Join(context.GlobalString("root"), "content")
if !filepath.IsAbs(root) { if !filepath.IsAbs(root) {
var err error var err error
root, err = filepath.Abs(root) root, err = filepath.Abs(root)

12
cmd/dist/fetch.go vendored
View File

@ -100,8 +100,8 @@ var fetchCommand = cli.Command{
// getResolver prepares the resolver from the environment and options. // getResolver prepares the resolver from the environment and options.
func getResolver(ctx contextpkg.Context) (remotes.Resolver, error) { func getResolver(ctx contextpkg.Context) (remotes.Resolver, error) {
return remotes.ResolverFunc(func(ctx contextpkg.Context, locator string) (remotes.Remote, error) { return remotes.ResolverFunc(func(ctx contextpkg.Context, locator string) (remotes.Fetcher, error) {
if !strings.HasPrefix(locator, "docker.io") { if !strings.HasPrefix(locator, "docker.io") && !strings.HasPrefix(locator, "localhost:5000") {
return nil, errors.Errorf("unsupported locator: %q", locator) return nil, errors.Errorf("unsupported locator: %q", locator)
} }
@ -113,12 +113,18 @@ func getResolver(ctx contextpkg.Context) (remotes.Resolver, error) {
prefix = strings.TrimPrefix(locator, "docker.io/") prefix = strings.TrimPrefix(locator, "docker.io/")
) )
if strings.HasPrefix(locator, "localhost:5000") {
base.Scheme = "http"
base.Host = "localhost:5000"
prefix = strings.TrimPrefix(locator, "localhost:5000/")
}
token, err := getToken(ctx, "repository:"+prefix+":pull") token, err := getToken(ctx, "repository:"+prefix+":pull")
if err != nil { if err != nil {
return nil, err return nil, err
} }
return remotes.RemoteFunc(func(ctx contextpkg.Context, object string, hints ...string) (io.ReadCloser, error) { return remotes.FetcherFunc(func(ctx contextpkg.Context, object string, hints ...string) (io.ReadCloser, error) {
ctx = log.WithLogger(ctx, log.G(ctx).WithFields( ctx = log.WithLogger(ctx, log.G(ctx).WithFields(
logrus.Fields{ logrus.Fields{
"prefix": prefix, // or repo? "prefix": prefix, // or repo?

2
cmd/dist/ingest.go vendored
View File

@ -56,6 +56,6 @@ var ingestCommand = cli.Command{
// TODO(stevvooe): Allow ingest to be reentrant. Currently, we expect // TODO(stevvooe): Allow ingest to be reentrant. Currently, we expect
// all data to be written in a single invocation. Allow multiple writes // all data to be written in a single invocation. Allow multiple writes
// to the same transaction key followed by a commit. // to the same transaction key followed by a commit.
return content.WriteBlob(ctx, ingester, os.Stdin, ref, expectedSize, expectedDigest) return content.WriteBlob(ctx, ingester, ref, os.Stdin, expectedSize, expectedDigest)
}, },
} }

4
cmd/dist/main.go vendored
View File

@ -38,9 +38,11 @@ distribution tool
EnvVar: "CONTAINERD_FETCH_TIMEOUT", EnvVar: "CONTAINERD_FETCH_TIMEOUT",
}, },
cli.StringFlag{ cli.StringFlag{
// TODO(stevvooe): for now, we allow circumventing the GRPC. Once
// we have clear separation, this will likely go away.
Name: "root", Name: "root",
Usage: "path to content store root", Usage: "path to content store root",
Value: "/tmp/content", // TODO(stevvooe): for now, just use the PWD/.content Value: "/var/lib/containerd",
}, },
cli.StringFlag{ cli.StringFlag{
Name: "socket, s", Name: "socket, s",

38
content/client.go
View File

@ -4,6 +4,9 @@ import (
"context" "context"
"io" "io"
"google.golang.org/grpc"
"google.golang.org/grpc/codes"
contentapi "github.com/docker/containerd/api/services/content" contentapi "github.com/docker/containerd/api/services/content"
digest "github.com/opencontainers/go-digest" digest "github.com/opencontainers/go-digest"
"github.com/pkg/errors" "github.com/pkg/errors"
@ -83,10 +86,10 @@ type remoteIngester struct {
client contentapi.ContentClient client contentapi.ContentClient
} }
func (ri *remoteIngester) Writer(ctx context.Context, ref string) (Writer, error) { func (ri *remoteIngester) Writer(ctx context.Context, ref string, size int64, expected digest.Digest) (Writer, error) {
wrclient, offset, err := ri.negotiate(ctx, ref) wrclient, offset, err := ri.negotiate(ctx, ref, size, expected)
if err != nil { if err != nil {
return nil, err return nil, rewriteGRPCError(err)
} }
return &remoteWriter{ return &remoteWriter{
@ -95,15 +98,17 @@ func (ri *remoteIngester) Writer(ctx context.Context, ref string) (Writer, error
}, nil }, nil
} }
func (ri *remoteIngester) negotiate(ctx context.Context, ref string) (contentapi.Content_WriteClient, int64, error) { func (ri *remoteIngester) negotiate(ctx context.Context, ref string, size int64, expected digest.Digest) (contentapi.Content_WriteClient, int64, error) {
wrclient, err := ri.client.Write(ctx) wrclient, err := ri.client.Write(ctx)
if err != nil { if err != nil {
return nil, 0, err return nil, 0, err
} }
if err := wrclient.Send(&contentapi.WriteRequest{ if err := wrclient.Send(&contentapi.WriteRequest{
Action: contentapi.WriteActionStat, Action: contentapi.WriteActionStat,
Ref: ref, Ref: ref,
Total: size,
Expected: expected,
}); err != nil { }); err != nil {
return nil, 0, err return nil, 0, err
} }
@ -192,12 +197,12 @@ func (rw *remoteWriter) Write(p []byte) (n int, err error) {
func (rw *remoteWriter) Commit(size int64, expected digest.Digest) error { func (rw *remoteWriter) Commit(size int64, expected digest.Digest) error {
resp, err := rw.send(&contentapi.WriteRequest{ resp, err := rw.send(&contentapi.WriteRequest{
Action: contentapi.WriteActionCommit, Action: contentapi.WriteActionCommit,
ExpectedSize: size, Total: size,
ExpectedDigest: expected, Expected: expected,
}) })
if err != nil { if err != nil {
return err return rewriteGRPCError(err)
} }
if size != 0 && resp.Offset != size { if size != 0 && resp.Offset != size {
@ -205,7 +210,7 @@ func (rw *remoteWriter) Commit(size int64, expected digest.Digest) error {
} }
if expected != "" && resp.Digest != expected { if expected != "" && resp.Digest != expected {
return errors.New("unexpected digest") return errors.Errorf("unexpected digest: %v != %v", resp.Digest, expected)
} }
return nil return nil
@ -214,3 +219,14 @@ func (rw *remoteWriter) Commit(size int64, expected digest.Digest) error {
func (rw *remoteWriter) Close() error { func (rw *remoteWriter) Close() error {
return rw.client.CloseSend() return rw.client.CloseSend()
} }
func rewriteGRPCError(err error) error {
switch grpc.Code(errors.Cause(err)) {
case codes.AlreadyExists:
return errExists
case codes.NotFound:
return errNotFound
}
return err
}

8
content/content.go
View File

@ -12,6 +12,7 @@ import (
var ( var (
errNotFound = errors.New("content: not found") errNotFound = errors.New("content: not found")
errExists = errors.New("content: exists")
BufPool = sync.Pool{ BufPool = sync.Pool{
New: func() interface{} { New: func() interface{} {
@ -33,6 +34,7 @@ type Provider interface {
type Status struct { type Status struct {
Ref string Ref string
Offset int64 Offset int64
Total int64
StartedAt time.Time StartedAt time.Time
UpdatedAt time.Time UpdatedAt time.Time
} }
@ -45,9 +47,13 @@ type Writer interface {
} }
type Ingester interface { type Ingester interface {
Writer(ctx context.Context, ref string) (Writer, error) Writer(ctx context.Context, ref string, size int64, expected digest.Digest) (Writer, error)
} }
func IsNotFound(err error) bool { func IsNotFound(err error) bool {
return errors.Cause(err) == errNotFound return errors.Cause(err) == errNotFound
} }
func IsExists(err error) bool {
return errors.Cause(err) == errExists
}

10
content/content_test.go
View File

@ -30,7 +30,7 @@ func TestContentWriter(t *testing.T) {
t.Fatal("ingest dir should be created", err) t.Fatal("ingest dir should be created", err)
} }
cw, err := cs.Writer(ctx, "myref") cw, err := cs.Writer(ctx, "myref", 0, "")
if err != nil { if err != nil {
t.Fatal(err) t.Fatal(err)
} }
@ -39,13 +39,13 @@ func TestContentWriter(t *testing.T) {
} }
// reopen, so we can test things // reopen, so we can test things
cw, err = cs.Writer(ctx, "myref") cw, err = cs.Writer(ctx, "myref", 0, "")
if err != nil { if err != nil {
t.Fatal(err) t.Fatal(err)
} }
// make sure that second resume also fails // make sure that second resume also fails
if _, err = cs.Writer(ctx, "myref"); err == nil { if _, err = cs.Writer(ctx, "myref", 0, ""); err == nil {
// TODO(stevvooe): This also works across processes. Need to find a way // TODO(stevvooe): This also works across processes. Need to find a way
// to test that, as well. // to test that, as well.
t.Fatal("no error on second resume") t.Fatal("no error on second resume")
@ -88,7 +88,7 @@ func TestContentWriter(t *testing.T) {
t.Fatal(err) t.Fatal(err)
} }
cw, err = cs.Writer(ctx, "aref") cw, err = cs.Writer(ctx, "aref", 0, "")
if err != nil { if err != nil {
t.Fatal(err) t.Fatal(err)
} }
@ -269,7 +269,7 @@ func checkBlobPath(t *testing.T, cs *Store, dgst digest.Digest) string {
} }
func checkWrite(t checker, ctx context.Context, cs *Store, dgst digest.Digest, p []byte) digest.Digest { func checkWrite(t checker, ctx context.Context, cs *Store, dgst digest.Digest, p []byte) digest.Digest {
if err := WriteBlob(ctx, cs, bytes.NewReader(p), dgst.String(), int64(len(p)), dgst); err != nil { if err := WriteBlob(ctx, cs, dgst.String(), bytes.NewReader(p), int64(len(p)), dgst); err != nil {
t.Fatal(err) t.Fatal(err)
} }

57
content/helpers.go
View File

@ -2,6 +2,7 @@ package content
import ( import (
"context" "context"
"fmt"
"io" "io"
"io/ioutil" "io/ioutil"
@ -16,10 +17,14 @@ import (
// This is useful when the digest and size are known beforehand. // This is useful when the digest and size are known beforehand.
// //
// Copy is buffered, so no need to wrap reader in buffered io. // Copy is buffered, so no need to wrap reader in buffered io.
func WriteBlob(ctx context.Context, cs Ingester, r io.Reader, ref string, size int64, expected digest.Digest) error { func WriteBlob(ctx context.Context, cs Ingester, ref string, r io.Reader, size int64, expected digest.Digest) error {
cw, err := cs.Writer(ctx, ref) cw, err := cs.Writer(ctx, ref, size, expected)
if err != nil { if err != nil {
return err if !IsExists(err) {
return err
}
return nil // all ready present
} }
ws, err := cw.Status() ws, err := cw.Status()
@ -28,30 +33,56 @@ func WriteBlob(ctx context.Context, cs Ingester, r io.Reader, ref string, size i
} }
if ws.Offset > 0 { if ws.Offset > 0 {
// Arbitrary limitation for now. We can detect io.Seeker on r and r, err = seekReader(r, ws.Offset, size)
// resume. if err != nil {
return errors.Errorf("cannot resume already started write") return errors.Wrapf(err, "unabled to resume write to %v", ref)
}
} }
buf := BufPool.Get().([]byte) buf := BufPool.Get().([]byte)
defer BufPool.Put(buf) defer BufPool.Put(buf)
nn, err := io.CopyBuffer(cw, r, buf) if _, err := io.CopyBuffer(cw, r, buf); err != nil {
if err != nil {
return err return err
} }
if size > 0 && nn != size {
return errors.Errorf("failed size verification: %v != %v", nn, size)
}
if err := cw.Commit(size, expected); err != nil { if err := cw.Commit(size, expected); err != nil {
return err if !IsExists(err) {
return err
}
} }
return nil return nil
} }
// seekReader attempts to seek the reader to the given offset, either by
// resolving `io.Seeker` or by detecting `io.ReaderAt`.
func seekReader(r io.Reader, offset, size int64) (io.Reader, error) {
// attempt to resolve r as a seeker and setup the offset.
seeker, ok := r.(io.Seeker)
if ok {
nn, err := seeker.Seek(offset, io.SeekStart)
if nn != offset {
return nil, fmt.Errorf("failed to seek to offset %v", offset)
}
if err != nil {
return nil, err
}
return r, nil
}
// ok, let's try io.ReaderAt!
readerAt, ok := r.(io.ReaderAt)
if ok && size > offset {
sr := io.NewSectionReader(readerAt, offset, size)
return sr, nil
}
return nil, errors.Errorf("cannot seek to offset %v", offset)
}
func readFileString(path string) (string, error) { func readFileString(path string) (string, error) {
p, err := ioutil.ReadFile(path) p, err := ioutil.ReadFile(path)
return string(p), err return string(p), err

56
content/store.go
View File

@ -2,10 +2,12 @@ package content
import ( import (
"context" "context"
"fmt"
"io" "io"
"io/ioutil" "io/ioutil"
"os" "os"
"path/filepath" "path/filepath"
"strconv"
"syscall" "syscall"
"time" "time"
@ -165,17 +167,34 @@ func (s *Store) status(ingestPath string) (Status, error) {
return Status{ return Status{
Ref: ref, Ref: ref,
Offset: fi.Size(), Offset: fi.Size(),
Total: s.total(ingestPath),
UpdatedAt: fi.ModTime(), UpdatedAt: fi.ModTime(),
StartedAt: startedAt, StartedAt: startedAt,
}, nil }, nil
} }
// total attempts to resolve the total expected size for the write.
func (s *Store) total(ingestPath string) int64 {
totalS, err := readFileString(filepath.Join(ingestPath, "total"))
if err != nil {
return 0
}
total, err := strconv.ParseInt(totalS, 10, 64)
if err != nil {
// represents a corrupted file, should probably remove.
return 0
}
return total
}
// Writer begins or resumes the active writer identified by ref. If the writer // Writer begins or resumes the active writer identified by ref. If the writer
// is already in use, an error is returned. Only one writer may be in use per // is already in use, an error is returned. Only one writer may be in use per
// ref at a time. // ref at a time.
// //
// The argument `ref` is used to uniquely identify a long-lived writer transaction. // The argument `ref` is used to uniquely identify a long-lived writer transaction.
func (s *Store) Writer(ctx context.Context, ref string) (Writer, error) { func (s *Store) Writer(ctx context.Context, ref string, total int64, expected digest.Digest) (Writer, error) {
path, refp, data, lock, err := s.ingestPaths(ref) path, refp, data, lock, err := s.ingestPaths(ref)
if err != nil { if err != nil {
return nil, err return nil, err
@ -202,16 +221,19 @@ func (s *Store) Writer(ctx context.Context, ref string) (Writer, error) {
return nil, err return nil, err
} }
// validate that we have no collision for the ref. status, err := s.status(path)
refraw, err := readFileString(refp)
if err != nil { if err != nil {
return nil, errors.Wrap(err, "could not read ref") return nil, errors.Wrap(err, "failed reading status of resume write")
} }
if ref != refraw { if ref != status.Ref {
// NOTE(stevvooe): This is fairly catastrophic. Either we have some // NOTE(stevvooe): This is fairly catastrophic. Either we have some
// layout corruption or a hash collision for the ref key. // layout corruption or a hash collision for the ref key.
return nil, errors.Wrapf(err, "ref key does not match: %v != %v", ref, refraw) return nil, errors.Wrapf(err, "ref key does not match: %v != %v", ref, status.Ref)
}
if total > 0 && status.Total > 0 && total != status.Total {
return nil, errors.Errorf("provided total differs from status: %v != %v", total, status.Total)
} }
// slow slow slow!!, send to goroutine or use resumable hashes // slow slow slow!!, send to goroutine or use resumable hashes
@ -229,18 +251,9 @@ func (s *Store) Writer(ctx context.Context, ref string) (Writer, error) {
return nil, err return nil, err
} }
fi, err := os.Stat(data) updatedAt = status.UpdatedAt
if err != nil { startedAt = status.StartedAt
return nil, err total = status.Total
}
updatedAt = fi.ModTime()
if st, ok := fi.Sys().(*syscall.Stat_t); ok {
startedAt = time.Unix(st.Ctim.Sec, st.Ctim.Nsec)
} else {
startedAt = updatedAt
}
} else { } else {
// the ingest is new, we need to setup the target location. // the ingest is new, we need to setup the target location.
// write the ref to a file for later use // write the ref to a file for later use
@ -248,6 +261,12 @@ func (s *Store) Writer(ctx context.Context, ref string) (Writer, error) {
return nil, err return nil, err
} }
if total > 0 {
if err := ioutil.WriteFile(filepath.Join(path, "total"), []byte(fmt.Sprint(total)), 0666); err != nil {
return nil, err
}
}
startedAt = time.Now() startedAt = time.Now()
updatedAt = startedAt updatedAt = startedAt
} }
@ -264,6 +283,7 @@ func (s *Store) Writer(ctx context.Context, ref string) (Writer, error) {
ref: ref, ref: ref,
path: path, path: path,
offset: offset, offset: offset,
total: total,
digester: digester, digester: digester,
startedAt: startedAt, startedAt: startedAt,
updatedAt: updatedAt, updatedAt: updatedAt,

30
content/writer.go
View File

@ -1,11 +1,11 @@
package content package content
import ( import (
"log"
"os" "os"
"path/filepath" "path/filepath"
"time" "time"
"github.com/docker/containerd/log"
"github.com/nightlyone/lockfile" "github.com/nightlyone/lockfile"
"github.com/opencontainers/go-digest" "github.com/opencontainers/go-digest"
"github.com/pkg/errors" "github.com/pkg/errors"
@ -19,6 +19,7 @@ type writer struct {
path string // path to writer dir path string // path to writer dir
ref string // ref key ref string // ref key
offset int64 offset int64
total int64
digester digest.Digester digester digest.Digester
startedAt time.Time startedAt time.Time
updatedAt time.Time updatedAt time.Time
@ -28,6 +29,7 @@ func (w *writer) Status() (Status, error) {
return Status{ return Status{
Ref: w.ref, Ref: w.ref,
Offset: w.offset, Offset: w.offset,
Total: w.total,
StartedAt: w.startedAt, StartedAt: w.startedAt,
UpdatedAt: w.updatedAt, UpdatedAt: w.updatedAt,
}, nil }, nil
@ -52,12 +54,12 @@ func (w *writer) Write(p []byte) (n int, err error) {
return n, err return n, err
} }
func (cw *writer) Commit(size int64, expected digest.Digest) error { func (w *writer) Commit(size int64, expected digest.Digest) error {
if err := cw.fp.Sync(); err != nil { if err := w.fp.Sync(); err != nil {
return errors.Wrap(err, "sync failed") return errors.Wrap(err, "sync failed")
} }
fi, err := cw.fp.Stat() fi, err := w.fp.Stat()
if err != nil { if err != nil {
return errors.Wrap(err, "stat on ingest file failed") return errors.Wrap(err, "stat on ingest file failed")
} }
@ -67,7 +69,7 @@ func (cw *writer) Commit(size int64, expected digest.Digest) error {
// only allowing reads honoring the umask on creation. // only allowing reads honoring the umask on creation.
// //
// This removes write and exec, only allowing read per the creation umask. // This removes write and exec, only allowing read per the creation umask.
if err := cw.fp.Chmod((fi.Mode() & os.ModePerm) &^ 0333); err != nil { if err := w.fp.Chmod((fi.Mode() & os.ModePerm) &^ 0333); err != nil {
return errors.Wrap(err, "failed to change ingest file permissions") return errors.Wrap(err, "failed to change ingest file permissions")
} }
@ -75,18 +77,18 @@ func (cw *writer) Commit(size int64, expected digest.Digest) error {
return errors.Errorf("failed size validation: %v != %v", fi.Size(), size) return errors.Errorf("failed size validation: %v != %v", fi.Size(), size)
} }
if err := cw.fp.Close(); err != nil { if err := w.fp.Close(); err != nil {
return errors.Wrap(err, "failed closing ingest") return errors.Wrap(err, "failed closing ingest")
} }
dgst := cw.digester.Digest() dgst := w.digester.Digest()
if expected != "" && expected != dgst { if expected != "" && expected != dgst {
return errors.Errorf("unexpected digest: %v != %v", dgst, expected) return errors.Errorf("unexpected digest: %v != %v", dgst, expected)
} }
var ( var (
ingest = filepath.Join(cw.path, "data") ingest = filepath.Join(w.path, "data")
target = cw.s.blobPath(dgst) target = w.s.blobPath(dgst)
) )
// make sure parent directories of blob exist // make sure parent directories of blob exist
@ -95,18 +97,18 @@ func (cw *writer) Commit(size int64, expected digest.Digest) error {
} }
// clean up!! // clean up!!
defer os.RemoveAll(cw.path) defer os.RemoveAll(w.path)
if err := os.Rename(ingest, target); err != nil { if err := os.Rename(ingest, target); err != nil {
if os.IsExist(err) { if os.IsExist(err) {
// collision with the target file! // collision with the target file!
return nil return errExists
} }
return err return err
} }
unlock(cw.lock) unlock(w.lock)
cw.fp = nil w.fp = nil
return nil return nil
} }
@ -121,7 +123,7 @@ func (cw *writer) Commit(size int64, expected digest.Digest) error {
// clean up the associated resources. // clean up the associated resources.
func (cw *writer) Close() (err error) { func (cw *writer) Close() (err error) {
if err := unlock(cw.lock); err != nil { if err := unlock(cw.lock); err != nil {
log.Printf("unlock failed: %v", err) log.L.Debug("unlock failed: %v", err)
} }
if cw.fp != nil { if cw.fp != nil {

8
remotes/remote.go
View File

@ -5,7 +5,7 @@ import (
"io" "io"
) )
type Remote interface { type Fetcher interface {
// Fetch the resource identified by id. The id is opaque to the remote, but // Fetch the resource identified by id. The id is opaque to the remote, but
// may typically be a tag or a digest. // may typically be a tag or a digest.
// //
@ -32,8 +32,10 @@ type Remote interface {
Fetch(ctx context.Context, id string, hints ...string) (io.ReadCloser, error) Fetch(ctx context.Context, id string, hints ...string) (io.ReadCloser, error)
} }
type RemoteFunc func(context.Context, string, ...string) (io.ReadCloser, error) // FetcherFunc allows package users to implement a Fetcher with just a
// function.
type FetcherFunc func(context.Context, string, ...string) (io.ReadCloser, error)
func (fn RemoteFunc) Fetch(ctx context.Context, object string, hints ...string) (io.ReadCloser, error) { func (fn FetcherFunc) Fetch(ctx context.Context, object string, hints ...string) (io.ReadCloser, error) {
return fn(ctx, object, hints...) return fn(ctx, object, hints...)
} }

6
remotes/resolver.go
View File

@ -9,11 +9,11 @@ type Resolver interface {
// A locator is a scheme-less URI representing the remote. Structurally, it // A locator is a scheme-less URI representing the remote. Structurally, it
// has a host and path. The "host" can be used to directly reference a // has a host and path. The "host" can be used to directly reference a
// specific host or be matched against a specific handler. // specific host or be matched against a specific handler.
Resolve(ctx context.Context, locator string) (Remote, error) Resolve(ctx context.Context, locator string) (Fetcher, error)
} }
type ResolverFunc func(context.Context, string) (Remote, error) type ResolverFunc func(context.Context, string) (Fetcher, error)
func (fn ResolverFunc) Resolve(ctx context.Context, locator string) (Remote, error) { func (fn ResolverFunc) Resolve(ctx context.Context, locator string) (Fetcher, error) {
return fn(ctx, locator) return fn(ctx, locator)
} }

109
services/content/service.go
View File

@ -1,12 +1,15 @@
package content package content
import ( import (
"errors"
"io" "io"
"github.com/Sirupsen/logrus"
"github.com/docker/containerd" "github.com/docker/containerd"
api "github.com/docker/containerd/api/services/content" api "github.com/docker/containerd/api/services/content"
"github.com/docker/containerd/content" "github.com/docker/containerd/content"
"github.com/docker/containerd/log"
digest "github.com/opencontainers/go-digest"
"github.com/pkg/errors"
"golang.org/x/net/context" "golang.org/x/net/context"
"google.golang.org/grpc" "google.golang.org/grpc"
"google.golang.org/grpc/codes" "google.golang.org/grpc/codes"
@ -128,14 +131,25 @@ func (rw *readResponseWriter) Write(p []byte) (n int, err error) {
func (s *Service) Write(session api.Content_WriteServer) (err error) { func (s *Service) Write(session api.Content_WriteServer) (err error) {
var ( var (
ref string ctx = session.Context()
msg api.WriteResponse msg api.WriteResponse
req *api.WriteRequest req *api.WriteRequest
ref string
total int64
expected digest.Digest
) )
defer func(msg *api.WriteResponse) { defer func(msg *api.WriteResponse) {
// pump through the last message if no error was encountered // pump through the last message if no error was encountered
if err != nil { if err != nil {
// TODO(stevvooe): Really need a log line here to track which
// errors are actually causing failure on the server side. May want
// to configure the service with an interceptor to make this work
// identically across all GRPC methods.
//
// This is pretty noisy, so we can remove it but leave it for now.
log.G(ctx).WithError(err).Error("(*Service).Write failed")
return return
} }
@ -149,47 +163,88 @@ func (s *Service) Write(session api.Content_WriteServer) (err error) {
} }
ref = req.Ref ref = req.Ref
if ref == "" { if ref == "" {
return grpc.Errorf(codes.InvalidArgument, "first message must have a reference") return grpc.Errorf(codes.InvalidArgument, "first message must have a reference")
} }
fields := logrus.Fields{
"ref": ref,
}
total = req.Total
expected = req.Expected
if total > 0 {
fields["total"] = total
}
if expected != "" {
fields["expected"] = expected
}
ctx = log.WithLogger(ctx, log.G(ctx).WithFields(fields))
// this action locks the writer for the session. // this action locks the writer for the session.
wr, err := s.store.Writer(session.Context(), ref) wr, err := s.store.Writer(ctx, ref, total, expected)
if err != nil { if err != nil {
return err return err
} }
defer wr.Close() defer wr.Close()
for { for {
// TODO(stevvooe): We need to study this behavior in containerd a
// little better to decide where to put this. We may be able to make
// this determination elsewhere and avoid even creating the writer.
//
// Ideally, we just use the expected digest on commit to abandon the
// cost of the move when they collide.
if req.ExpectedDigest != "" {
if _, err := s.store.Info(req.ExpectedDigest); err != nil {
if !content.IsNotFound(err) {
return err
}
return grpc.Errorf(codes.AlreadyExists, "blob with expected digest %v exists", req.ExpectedDigest)
}
}
msg.Action = req.Action msg.Action = req.Action
ws, err := wr.Status() ws, err := wr.Status()
if err != nil { if err != nil {
return err return err
} }
msg.Offset = ws.Offset msg.Offset = ws.Offset // always set the offset.
msg.StartedAt = ws.StartedAt
msg.UpdatedAt = ws.UpdatedAt // NOTE(stevvooe): In general, there are two cases underwhich a remote
// writer is used.
//
// For pull, we almost always have this before fetching large content,
// through descriptors. We allow predeclaration of the expected size
// and digest.
//
// For push, it is more complex. If we want to cut through content into
// storage, we may have no expectation until we are done processing the
// content. The case here is the following:
//
// 1. Start writing content.
// 2. Compress inline.
// 3. Validate digest and size (maybe).
//
// Supporting these two paths is quite awkward but it let's both API
// users use the same writer style for each with a minimum of overhead.
if req.Expected != "" {
if expected != "" && expected != req.Expected {
return grpc.Errorf(codes.InvalidArgument, "inconsistent digest provided: %v != %v", req.Expected, expected)
}
expected = req.Expected
if _, err := s.store.Info(req.Expected); err == nil {
if err := s.store.Abort(ref); err != nil {
log.G(ctx).WithError(err).Error("failed to abort write")
}
return grpc.Errorf(codes.AlreadyExists, "blob with expected digest %v exists", req.Expected)
}
}
if req.Total > 0 {
// Update the expected total. Typically, this could be seen at
// negotiation time or on a commit message.
if total > 0 && req.Total != total {
return grpc.Errorf(codes.InvalidArgument, "inconsistent total provided: %v != %v", req.Total, total)
}
total = req.Total
}
switch req.Action { switch req.Action {
case api.WriteActionStat: case api.WriteActionStat:
msg.Digest = wr.Digest() msg.Digest = wr.Digest()
msg.StartedAt = ws.StartedAt
msg.UpdatedAt = ws.UpdatedAt
msg.Total = total
case api.WriteActionWrite, api.WriteActionCommit: case api.WriteActionWrite, api.WriteActionCommit:
if req.Offset > 0 { if req.Offset > 0 {
// validate the offset if provided // validate the offset if provided
@ -217,7 +272,11 @@ func (s *Service) Write(session api.Content_WriteServer) (err error) {
} }
if req.Action == api.WriteActionCommit { if req.Action == api.WriteActionCommit {
return wr.Commit(req.ExpectedSize, req.ExpectedDigest) if err := wr.Commit(total, expected); err != nil {
return err
}
msg.Digest = wr.Digest()
} }
case api.WriteActionAbort: case api.WriteActionAbort:
return s.store.Abort(ref) return s.store.Abort(ref)