VOL-2112 move to voltha-lib-go
Change-Id: Ic1af08003c1d2c698c0cce371e64f47b47b8d875
diff --git a/vendor/go.etcd.io/etcd/raft/raftpb/confchange.go b/vendor/go.etcd.io/etcd/raft/raftpb/confchange.go
new file mode 100644
index 0000000..46a7a70
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/raft/raftpb/confchange.go
@@ -0,0 +1,170 @@
+// Copyright 2019 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package raftpb
+
+import (
+ "fmt"
+ "strconv"
+ "strings"
+
+ "github.com/gogo/protobuf/proto"
+)
+
+// ConfChangeI abstracts over ConfChangeV2 and (legacy) ConfChange to allow
+// treating them in a unified manner.
+type ConfChangeI interface {
+ AsV2() ConfChangeV2
+ AsV1() (ConfChange, bool)
+}
+
+// MarshalConfChange calls Marshal on the underlying ConfChange or ConfChangeV2
+// and returns the result along with the corresponding EntryType.
+func MarshalConfChange(c ConfChangeI) (EntryType, []byte, error) {
+ var typ EntryType
+ var ccdata []byte
+ var err error
+ if ccv1, ok := c.AsV1(); ok {
+ typ = EntryConfChange
+ ccdata, err = ccv1.Marshal()
+ } else {
+ ccv2 := c.AsV2()
+ typ = EntryConfChangeV2
+ ccdata, err = ccv2.Marshal()
+ }
+ return typ, ccdata, err
+}
+
+// AsV2 returns a V2 configuration change carrying out the same operation.
+func (c ConfChange) AsV2() ConfChangeV2 {
+ return ConfChangeV2{
+ Changes: []ConfChangeSingle{{
+ Type: c.Type,
+ NodeID: c.NodeID,
+ }},
+ Context: c.Context,
+ }
+}
+
+// AsV1 returns the ConfChange and true.
+func (c ConfChange) AsV1() (ConfChange, bool) {
+ return c, true
+}
+
+// AsV2 is the identity.
+func (c ConfChangeV2) AsV2() ConfChangeV2 { return c }
+
+// AsV1 returns ConfChange{} and false.
+func (c ConfChangeV2) AsV1() (ConfChange, bool) { return ConfChange{}, false }
+
+// EnterJoint returns two bools. The second bool is true if and only if this
+// config change will use Joint Consensus, which is the case if it contains more
+// than one change or if the use of Joint Consensus was requested explicitly.
+// The first bool can only be true if second one is, and indicates whether the
+// Joint State will be left automatically.
+func (c *ConfChangeV2) EnterJoint() (autoLeave bool, ok bool) {
+ // NB: in theory, more config changes could qualify for the "simple"
+ // protocol but it depends on the config on top of which the changes apply.
+ // For example, adding two learners is not OK if both nodes are part of the
+ // base config (i.e. two voters are turned into learners in the process of
+ // applying the conf change). In practice, these distinctions should not
+ // matter, so we keep it simple and use Joint Consensus liberally.
+ if c.Transition != ConfChangeTransitionAuto || len(c.Changes) > 1 {
+ // Use Joint Consensus.
+ var autoLeave bool
+ switch c.Transition {
+ case ConfChangeTransitionAuto:
+ autoLeave = true
+ case ConfChangeTransitionJointImplicit:
+ autoLeave = true
+ case ConfChangeTransitionJointExplicit:
+ default:
+ panic(fmt.Sprintf("unknown transition: %+v", c))
+ }
+ return autoLeave, true
+ }
+ return false, false
+}
+
+// LeaveJoint is true if the configuration change leaves a joint configuration.
+// This is the case if the ConfChangeV2 is zero, with the possible exception of
+// the Context field.
+func (c *ConfChangeV2) LeaveJoint() bool {
+ cpy := *c
+ cpy.Context = nil
+ return proto.Equal(&cpy, &ConfChangeV2{})
+}
+
+// ConfChangesFromString parses a Space-delimited sequence of operations into a
+// slice of ConfChangeSingle. The supported operations are:
+// - vn: make n a voter,
+// - ln: make n a learner,
+// - rn: remove n, and
+// - un: update n.
+func ConfChangesFromString(s string) ([]ConfChangeSingle, error) {
+ var ccs []ConfChangeSingle
+ toks := strings.Split(strings.TrimSpace(s), " ")
+ if toks[0] == "" {
+ toks = nil
+ }
+ for _, tok := range toks {
+ if len(tok) < 2 {
+ return nil, fmt.Errorf("unknown token %s", tok)
+ }
+ var cc ConfChangeSingle
+ switch tok[0] {
+ case 'v':
+ cc.Type = ConfChangeAddNode
+ case 'l':
+ cc.Type = ConfChangeAddLearnerNode
+ case 'r':
+ cc.Type = ConfChangeRemoveNode
+ case 'u':
+ cc.Type = ConfChangeUpdateNode
+ default:
+ return nil, fmt.Errorf("unknown input: %s", tok)
+ }
+ id, err := strconv.ParseUint(tok[1:], 10, 64)
+ if err != nil {
+ return nil, err
+ }
+ cc.NodeID = id
+ ccs = append(ccs, cc)
+ }
+ return ccs, nil
+}
+
+// ConfChangesToString is the inverse to ConfChangesFromString.
+func ConfChangesToString(ccs []ConfChangeSingle) string {
+ var buf strings.Builder
+ for i, cc := range ccs {
+ if i > 0 {
+ buf.WriteByte(' ')
+ }
+ switch cc.Type {
+ case ConfChangeAddNode:
+ buf.WriteByte('v')
+ case ConfChangeAddLearnerNode:
+ buf.WriteByte('l')
+ case ConfChangeRemoveNode:
+ buf.WriteByte('r')
+ case ConfChangeUpdateNode:
+ buf.WriteByte('u')
+ default:
+ buf.WriteString("unknown")
+ }
+ fmt.Fprintf(&buf, "%d", cc.NodeID)
+ }
+ return buf.String()
+}
diff --git a/vendor/go.etcd.io/etcd/raft/raftpb/confstate.go b/vendor/go.etcd.io/etcd/raft/raftpb/confstate.go
new file mode 100644
index 0000000..4bda932
--- /dev/null
+++ b/vendor/go.etcd.io/etcd/raft/raftpb/confstate.go
@@ -0,0 +1,45 @@
+// Copyright 2019 The etcd Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package raftpb
+
+import (
+ "fmt"
+ "reflect"
+ "sort"
+)
+
+// Equivalent returns a nil error if the inputs describe the same configuration.
+// On mismatch, returns a descriptive error showing the differences.
+func (cs ConfState) Equivalent(cs2 ConfState) error {
+ cs1 := cs
+ orig1, orig2 := cs1, cs2
+ s := func(sl *[]uint64) {
+ *sl = append([]uint64(nil), *sl...)
+ sort.Slice(*sl, func(i, j int) bool { return (*sl)[i] < (*sl)[j] })
+ }
+
+ for _, cs := range []*ConfState{&cs1, &cs2} {
+ s(&cs.Voters)
+ s(&cs.Learners)
+ s(&cs.VotersOutgoing)
+ s(&cs.LearnersNext)
+ cs.XXX_unrecognized = nil
+ }
+
+ if !reflect.DeepEqual(cs1, cs2) {
+ return fmt.Errorf("ConfStates not equivalent after sorting:\n%+#v\n%+#v\nInputs were:\n%+#v\n%+#v", cs1, cs2, orig1, orig2)
+ }
+ return nil
+}
diff --git a/vendor/go.etcd.io/etcd/raft/raftpb/raft.pb.go b/vendor/go.etcd.io/etcd/raft/raftpb/raft.pb.go
index fd9ee37..fcf259c 100644
--- a/vendor/go.etcd.io/etcd/raft/raftpb/raft.pb.go
+++ b/vendor/go.etcd.io/etcd/raft/raftpb/raft.pb.go
@@ -15,6 +15,8 @@
HardState
ConfState
ConfChange
+ ConfChangeSingle
+ ConfChangeV2
*/
package raftpb
@@ -44,17 +46,20 @@
type EntryType int32
const (
- EntryNormal EntryType = 0
- EntryConfChange EntryType = 1
+ EntryNormal EntryType = 0
+ EntryConfChange EntryType = 1
+ EntryConfChangeV2 EntryType = 2
)
var EntryType_name = map[int32]string{
0: "EntryNormal",
1: "EntryConfChange",
+ 2: "EntryConfChangeV2",
}
var EntryType_value = map[string]int32{
- "EntryNormal": 0,
- "EntryConfChange": 1,
+ "EntryNormal": 0,
+ "EntryConfChange": 1,
+ "EntryConfChangeV2": 2,
}
func (x EntryType) Enum() *EntryType {
@@ -160,6 +165,57 @@
}
func (MessageType) EnumDescriptor() ([]byte, []int) { return fileDescriptorRaft, []int{1} }
+// ConfChangeTransition specifies the behavior of a configuration change with
+// respect to joint consensus.
+type ConfChangeTransition int32
+
+const (
+ // Automatically use the simple protocol if possible, otherwise fall back
+ // to ConfChangeJointImplicit. Most applications will want to use this.
+ ConfChangeTransitionAuto ConfChangeTransition = 0
+ // Use joint consensus unconditionally, and transition out of them
+ // automatically (by proposing a zero configuration change).
+ //
+ // This option is suitable for applications that want to minimize the time
+ // spent in the joint configuration and do not store the joint configuration
+ // in the state machine (outside of InitialState).
+ ConfChangeTransitionJointImplicit ConfChangeTransition = 1
+ // Use joint consensus and remain in the joint configuration until the
+ // application proposes a no-op configuration change. This is suitable for
+ // applications that want to explicitly control the transitions, for example
+ // to use a custom payload (via the Context field).
+ ConfChangeTransitionJointExplicit ConfChangeTransition = 2
+)
+
+var ConfChangeTransition_name = map[int32]string{
+ 0: "ConfChangeTransitionAuto",
+ 1: "ConfChangeTransitionJointImplicit",
+ 2: "ConfChangeTransitionJointExplicit",
+}
+var ConfChangeTransition_value = map[string]int32{
+ "ConfChangeTransitionAuto": 0,
+ "ConfChangeTransitionJointImplicit": 1,
+ "ConfChangeTransitionJointExplicit": 2,
+}
+
+func (x ConfChangeTransition) Enum() *ConfChangeTransition {
+ p := new(ConfChangeTransition)
+ *p = x
+ return p
+}
+func (x ConfChangeTransition) String() string {
+ return proto.EnumName(ConfChangeTransition_name, int32(x))
+}
+func (x *ConfChangeTransition) UnmarshalJSON(data []byte) error {
+ value, err := proto.UnmarshalJSONEnum(ConfChangeTransition_value, data, "ConfChangeTransition")
+ if err != nil {
+ return err
+ }
+ *x = ConfChangeTransition(value)
+ return nil
+}
+func (ConfChangeTransition) EnumDescriptor() ([]byte, []int) { return fileDescriptorRaft, []int{2} }
+
type ConfChangeType int32
const (
@@ -198,7 +254,7 @@
*x = ConfChangeType(value)
return nil
}
-func (ConfChangeType) EnumDescriptor() ([]byte, []int) { return fileDescriptorRaft, []int{2} }
+func (ConfChangeType) EnumDescriptor() ([]byte, []int) { return fileDescriptorRaft, []int{3} }
type Entry struct {
Term uint64 `protobuf:"varint,2,opt,name=Term" json:"Term"`
@@ -270,9 +326,21 @@
func (*HardState) Descriptor() ([]byte, []int) { return fileDescriptorRaft, []int{4} }
type ConfState struct {
- Nodes []uint64 `protobuf:"varint,1,rep,name=nodes" json:"nodes,omitempty"`
- Learners []uint64 `protobuf:"varint,2,rep,name=learners" json:"learners,omitempty"`
- XXX_unrecognized []byte `json:"-"`
+ // The voters in the incoming config. (If the configuration is not joint,
+ // then the outgoing config is empty).
+ Voters []uint64 `protobuf:"varint,1,rep,name=voters" json:"voters,omitempty"`
+ // The learners in the incoming config.
+ Learners []uint64 `protobuf:"varint,2,rep,name=learners" json:"learners,omitempty"`
+ // The voters in the outgoing config.
+ VotersOutgoing []uint64 `protobuf:"varint,3,rep,name=voters_outgoing,json=votersOutgoing" json:"voters_outgoing,omitempty"`
+ // The nodes that will become learners when the outgoing config is removed.
+ // These nodes are necessarily currently in nodes_joint (or they would have
+ // been added to the incoming config right away).
+ LearnersNext []uint64 `protobuf:"varint,4,rep,name=learners_next,json=learnersNext" json:"learners_next,omitempty"`
+ // If set, the config is joint and Raft will automatically transition into
+ // the final config (i.e. remove the outgoing config) when this is safe.
+ AutoLeave bool `protobuf:"varint,5,opt,name=auto_leave,json=autoLeave" json:"auto_leave"`
+ XXX_unrecognized []byte `json:"-"`
}
func (m *ConfState) Reset() { *m = ConfState{} }
@@ -281,11 +349,14 @@
func (*ConfState) Descriptor() ([]byte, []int) { return fileDescriptorRaft, []int{5} }
type ConfChange struct {
- ID uint64 `protobuf:"varint,1,opt,name=ID" json:"ID"`
- Type ConfChangeType `protobuf:"varint,2,opt,name=Type,enum=raftpb.ConfChangeType" json:"Type"`
- NodeID uint64 `protobuf:"varint,3,opt,name=NodeID" json:"NodeID"`
- Context []byte `protobuf:"bytes,4,opt,name=Context" json:"Context,omitempty"`
- XXX_unrecognized []byte `json:"-"`
+ Type ConfChangeType `protobuf:"varint,2,opt,name=type,enum=raftpb.ConfChangeType" json:"type"`
+ NodeID uint64 `protobuf:"varint,3,opt,name=node_id,json=nodeId" json:"node_id"`
+ Context []byte `protobuf:"bytes,4,opt,name=context" json:"context,omitempty"`
+ // NB: this is used only by etcd to thread through a unique identifier.
+ // Ideally it should really use the Context instead. No counterpart to
+ // this field exists in ConfChangeV2.
+ ID uint64 `protobuf:"varint,1,opt,name=id" json:"id"`
+ XXX_unrecognized []byte `json:"-"`
}
func (m *ConfChange) Reset() { *m = ConfChange{} }
@@ -293,6 +364,63 @@
func (*ConfChange) ProtoMessage() {}
func (*ConfChange) Descriptor() ([]byte, []int) { return fileDescriptorRaft, []int{6} }
+// ConfChangeSingle is an individual configuration change operation. Multiple
+// such operations can be carried out atomically via a ConfChangeV2.
+type ConfChangeSingle struct {
+ Type ConfChangeType `protobuf:"varint,1,opt,name=type,enum=raftpb.ConfChangeType" json:"type"`
+ NodeID uint64 `protobuf:"varint,2,opt,name=node_id,json=nodeId" json:"node_id"`
+ XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *ConfChangeSingle) Reset() { *m = ConfChangeSingle{} }
+func (m *ConfChangeSingle) String() string { return proto.CompactTextString(m) }
+func (*ConfChangeSingle) ProtoMessage() {}
+func (*ConfChangeSingle) Descriptor() ([]byte, []int) { return fileDescriptorRaft, []int{7} }
+
+// ConfChangeV2 messages initiate configuration changes. They support both the
+// simple "one at a time" membership change protocol and full Joint Consensus
+// allowing for arbitrary changes in membership.
+//
+// The supplied context is treated as an opaque payload and can be used to
+// attach an action on the state machine to the application of the config change
+// proposal. Note that contrary to Joint Consensus as outlined in the Raft
+// paper[1], configuration changes become active when they are *applied* to the
+// state machine (not when they are appended to the log).
+//
+// The simple protocol can be used whenever only a single change is made.
+//
+// Non-simple changes require the use of Joint Consensus, for which two
+// configuration changes are run. The first configuration change specifies the
+// desired changes and transitions the Raft group into the joint configuration,
+// in which quorum requires a majority of both the pre-changes and post-changes
+// configuration. Joint Consensus avoids entering fragile intermediate
+// configurations that could compromise survivability. For example, without the
+// use of Joint Consensus and running across three availability zones with a
+// replication factor of three, it is not possible to replace a voter without
+// entering an intermediate configuration that does not survive the outage of
+// one availability zone.
+//
+// The provided ConfChangeTransition specifies how (and whether) Joint Consensus
+// is used, and assigns the task of leaving the joint configuration either to
+// Raft or the application. Leaving the joint configuration is accomplished by
+// proposing a ConfChangeV2 with only and optionally the Context field
+// populated.
+//
+// For details on Raft membership changes, see:
+//
+// [1]: https://github.com/ongardie/dissertation/blob/master/online-trim.pdf
+type ConfChangeV2 struct {
+ Transition ConfChangeTransition `protobuf:"varint,1,opt,name=transition,enum=raftpb.ConfChangeTransition" json:"transition"`
+ Changes []ConfChangeSingle `protobuf:"bytes,2,rep,name=changes" json:"changes"`
+ Context []byte `protobuf:"bytes,3,opt,name=context" json:"context,omitempty"`
+ XXX_unrecognized []byte `json:"-"`
+}
+
+func (m *ConfChangeV2) Reset() { *m = ConfChangeV2{} }
+func (m *ConfChangeV2) String() string { return proto.CompactTextString(m) }
+func (*ConfChangeV2) ProtoMessage() {}
+func (*ConfChangeV2) Descriptor() ([]byte, []int) { return fileDescriptorRaft, []int{8} }
+
func init() {
proto.RegisterType((*Entry)(nil), "raftpb.Entry")
proto.RegisterType((*SnapshotMetadata)(nil), "raftpb.SnapshotMetadata")
@@ -301,8 +429,11 @@
proto.RegisterType((*HardState)(nil), "raftpb.HardState")
proto.RegisterType((*ConfState)(nil), "raftpb.ConfState")
proto.RegisterType((*ConfChange)(nil), "raftpb.ConfChange")
+ proto.RegisterType((*ConfChangeSingle)(nil), "raftpb.ConfChangeSingle")
+ proto.RegisterType((*ConfChangeV2)(nil), "raftpb.ConfChangeV2")
proto.RegisterEnum("raftpb.EntryType", EntryType_name, EntryType_value)
proto.RegisterEnum("raftpb.MessageType", MessageType_name, MessageType_value)
+ proto.RegisterEnum("raftpb.ConfChangeTransition", ConfChangeTransition_name, ConfChangeTransition_value)
proto.RegisterEnum("raftpb.ConfChangeType", ConfChangeType_name, ConfChangeType_value)
}
func (m *Entry) Marshal() (dAtA []byte, err error) {
@@ -535,8 +666,8 @@
_ = i
var l int
_ = l
- if len(m.Nodes) > 0 {
- for _, num := range m.Nodes {
+ if len(m.Voters) > 0 {
+ for _, num := range m.Voters {
dAtA[i] = 0x8
i++
i = encodeVarintRaft(dAtA, i, uint64(num))
@@ -549,6 +680,28 @@
i = encodeVarintRaft(dAtA, i, uint64(num))
}
}
+ if len(m.VotersOutgoing) > 0 {
+ for _, num := range m.VotersOutgoing {
+ dAtA[i] = 0x18
+ i++
+ i = encodeVarintRaft(dAtA, i, uint64(num))
+ }
+ }
+ if len(m.LearnersNext) > 0 {
+ for _, num := range m.LearnersNext {
+ dAtA[i] = 0x20
+ i++
+ i = encodeVarintRaft(dAtA, i, uint64(num))
+ }
+ }
+ dAtA[i] = 0x28
+ i++
+ if m.AutoLeave {
+ dAtA[i] = 1
+ } else {
+ dAtA[i] = 0
+ }
+ i++
if m.XXX_unrecognized != nil {
i += copy(dAtA[i:], m.XXX_unrecognized)
}
@@ -591,6 +744,75 @@
return i, nil
}
+func (m *ConfChangeSingle) 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 *ConfChangeSingle) MarshalTo(dAtA []byte) (int, error) {
+ var i int
+ _ = i
+ var l int
+ _ = l
+ dAtA[i] = 0x8
+ i++
+ i = encodeVarintRaft(dAtA, i, uint64(m.Type))
+ dAtA[i] = 0x10
+ i++
+ i = encodeVarintRaft(dAtA, i, uint64(m.NodeID))
+ if m.XXX_unrecognized != nil {
+ i += copy(dAtA[i:], m.XXX_unrecognized)
+ }
+ return i, nil
+}
+
+func (m *ConfChangeV2) 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 *ConfChangeV2) MarshalTo(dAtA []byte) (int, error) {
+ var i int
+ _ = i
+ var l int
+ _ = l
+ dAtA[i] = 0x8
+ i++
+ i = encodeVarintRaft(dAtA, i, uint64(m.Transition))
+ if len(m.Changes) > 0 {
+ for _, msg := range m.Changes {
+ dAtA[i] = 0x12
+ i++
+ i = encodeVarintRaft(dAtA, i, uint64(msg.Size()))
+ n, err := msg.MarshalTo(dAtA[i:])
+ if err != nil {
+ return 0, err
+ }
+ i += n
+ }
+ }
+ if m.Context != nil {
+ dAtA[i] = 0x1a
+ i++
+ i = encodeVarintRaft(dAtA, i, uint64(len(m.Context)))
+ i += copy(dAtA[i:], m.Context)
+ }
+ if m.XXX_unrecognized != nil {
+ i += copy(dAtA[i:], m.XXX_unrecognized)
+ }
+ return i, nil
+}
+
func encodeVarintRaft(dAtA []byte, offset int, v uint64) int {
for v >= 1<<7 {
dAtA[offset] = uint8(v&0x7f | 0x80)
@@ -689,8 +911,8 @@
func (m *ConfState) Size() (n int) {
var l int
_ = l
- if len(m.Nodes) > 0 {
- for _, e := range m.Nodes {
+ if len(m.Voters) > 0 {
+ for _, e := range m.Voters {
n += 1 + sovRaft(uint64(e))
}
}
@@ -699,6 +921,17 @@
n += 1 + sovRaft(uint64(e))
}
}
+ if len(m.VotersOutgoing) > 0 {
+ for _, e := range m.VotersOutgoing {
+ n += 1 + sovRaft(uint64(e))
+ }
+ }
+ if len(m.LearnersNext) > 0 {
+ for _, e := range m.LearnersNext {
+ n += 1 + sovRaft(uint64(e))
+ }
+ }
+ n += 2
if m.XXX_unrecognized != nil {
n += len(m.XXX_unrecognized)
}
@@ -721,6 +954,37 @@
return n
}
+func (m *ConfChangeSingle) Size() (n int) {
+ var l int
+ _ = l
+ n += 1 + sovRaft(uint64(m.Type))
+ n += 1 + sovRaft(uint64(m.NodeID))
+ if m.XXX_unrecognized != nil {
+ n += len(m.XXX_unrecognized)
+ }
+ return n
+}
+
+func (m *ConfChangeV2) Size() (n int) {
+ var l int
+ _ = l
+ n += 1 + sovRaft(uint64(m.Transition))
+ if len(m.Changes) > 0 {
+ for _, e := range m.Changes {
+ l = e.Size()
+ n += 1 + l + sovRaft(uint64(l))
+ }
+ }
+ if m.Context != nil {
+ l = len(m.Context)
+ n += 1 + l + sovRaft(uint64(l))
+ }
+ if m.XXX_unrecognized != nil {
+ n += len(m.XXX_unrecognized)
+ }
+ return n
+}
+
func sovRaft(x uint64) (n int) {
for {
n++
@@ -1573,7 +1837,7 @@
break
}
}
- m.Nodes = append(m.Nodes, v)
+ m.Voters = append(m.Voters, v)
} else if wireType == 2 {
var packedLen int
for shift := uint(0); ; shift += 7 {
@@ -1613,10 +1877,10 @@
break
}
}
- m.Nodes = append(m.Nodes, v)
+ m.Voters = append(m.Voters, v)
}
} else {
- return fmt.Errorf("proto: wrong wireType = %d for field Nodes", wireType)
+ return fmt.Errorf("proto: wrong wireType = %d for field Voters", wireType)
}
case 2:
if wireType == 0 {
@@ -1680,6 +1944,150 @@
} else {
return fmt.Errorf("proto: wrong wireType = %d for field Learners", wireType)
}
+ case 3:
+ if wireType == 0 {
+ var v uint64
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ v |= (uint64(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ m.VotersOutgoing = append(m.VotersOutgoing, v)
+ } else if wireType == 2 {
+ var packedLen int
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ packedLen |= (int(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ if packedLen < 0 {
+ return ErrInvalidLengthRaft
+ }
+ postIndex := iNdEx + packedLen
+ if postIndex > l {
+ return io.ErrUnexpectedEOF
+ }
+ for iNdEx < postIndex {
+ var v uint64
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ v |= (uint64(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ m.VotersOutgoing = append(m.VotersOutgoing, v)
+ }
+ } else {
+ return fmt.Errorf("proto: wrong wireType = %d for field VotersOutgoing", wireType)
+ }
+ case 4:
+ if wireType == 0 {
+ var v uint64
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ v |= (uint64(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ m.LearnersNext = append(m.LearnersNext, v)
+ } else if wireType == 2 {
+ var packedLen int
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ packedLen |= (int(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ if packedLen < 0 {
+ return ErrInvalidLengthRaft
+ }
+ postIndex := iNdEx + packedLen
+ if postIndex > l {
+ return io.ErrUnexpectedEOF
+ }
+ for iNdEx < postIndex {
+ var v uint64
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ v |= (uint64(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ m.LearnersNext = append(m.LearnersNext, v)
+ }
+ } else {
+ return fmt.Errorf("proto: wrong wireType = %d for field LearnersNext", wireType)
+ }
+ case 5:
+ if wireType != 0 {
+ return fmt.Errorf("proto: wrong wireType = %d for field AutoLeave", wireType)
+ }
+ var v int
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ v |= (int(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ m.AutoLeave = bool(v != 0)
default:
iNdEx = preIndex
skippy, err := skipRaft(dAtA[iNdEx:])
@@ -1841,6 +2249,227 @@
}
return nil
}
+func (m *ConfChangeSingle) 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 ErrIntOverflowRaft
+ }
+ 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: ConfChangeSingle: wiretype end group for non-group")
+ }
+ if fieldNum <= 0 {
+ return fmt.Errorf("proto: ConfChangeSingle: illegal tag %d (wire type %d)", fieldNum, wire)
+ }
+ switch fieldNum {
+ case 1:
+ if wireType != 0 {
+ return fmt.Errorf("proto: wrong wireType = %d for field Type", wireType)
+ }
+ m.Type = 0
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ m.Type |= (ConfChangeType(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ case 2:
+ if wireType != 0 {
+ return fmt.Errorf("proto: wrong wireType = %d for field NodeID", wireType)
+ }
+ m.NodeID = 0
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ m.NodeID |= (uint64(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ default:
+ iNdEx = preIndex
+ skippy, err := skipRaft(dAtA[iNdEx:])
+ if err != nil {
+ return err
+ }
+ if skippy < 0 {
+ return ErrInvalidLengthRaft
+ }
+ if (iNdEx + skippy) > l {
+ return io.ErrUnexpectedEOF
+ }
+ m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
+ iNdEx += skippy
+ }
+ }
+
+ if iNdEx > l {
+ return io.ErrUnexpectedEOF
+ }
+ return nil
+}
+func (m *ConfChangeV2) 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 ErrIntOverflowRaft
+ }
+ 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: ConfChangeV2: wiretype end group for non-group")
+ }
+ if fieldNum <= 0 {
+ return fmt.Errorf("proto: ConfChangeV2: illegal tag %d (wire type %d)", fieldNum, wire)
+ }
+ switch fieldNum {
+ case 1:
+ if wireType != 0 {
+ return fmt.Errorf("proto: wrong wireType = %d for field Transition", wireType)
+ }
+ m.Transition = 0
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ m.Transition |= (ConfChangeTransition(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ case 2:
+ if wireType != 2 {
+ return fmt.Errorf("proto: wrong wireType = %d for field Changes", wireType)
+ }
+ var msglen int
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ msglen |= (int(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ if msglen < 0 {
+ return ErrInvalidLengthRaft
+ }
+ postIndex := iNdEx + msglen
+ if postIndex > l {
+ return io.ErrUnexpectedEOF
+ }
+ m.Changes = append(m.Changes, ConfChangeSingle{})
+ if err := m.Changes[len(m.Changes)-1].Unmarshal(dAtA[iNdEx:postIndex]); err != nil {
+ return err
+ }
+ iNdEx = postIndex
+ case 3:
+ if wireType != 2 {
+ return fmt.Errorf("proto: wrong wireType = %d for field Context", wireType)
+ }
+ var byteLen int
+ for shift := uint(0); ; shift += 7 {
+ if shift >= 64 {
+ return ErrIntOverflowRaft
+ }
+ if iNdEx >= l {
+ return io.ErrUnexpectedEOF
+ }
+ b := dAtA[iNdEx]
+ iNdEx++
+ byteLen |= (int(b) & 0x7F) << shift
+ if b < 0x80 {
+ break
+ }
+ }
+ if byteLen < 0 {
+ return ErrInvalidLengthRaft
+ }
+ postIndex := iNdEx + byteLen
+ if postIndex > l {
+ return io.ErrUnexpectedEOF
+ }
+ m.Context = append(m.Context[:0], dAtA[iNdEx:postIndex]...)
+ if m.Context == nil {
+ m.Context = []byte{}
+ }
+ iNdEx = postIndex
+ default:
+ iNdEx = preIndex
+ skippy, err := skipRaft(dAtA[iNdEx:])
+ if err != nil {
+ return err
+ }
+ if skippy < 0 {
+ return ErrInvalidLengthRaft
+ }
+ if (iNdEx + skippy) > l {
+ return io.ErrUnexpectedEOF
+ }
+ m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...)
+ iNdEx += skippy
+ }
+ }
+
+ if iNdEx > l {
+ return io.ErrUnexpectedEOF
+ }
+ return nil
+}
func skipRaft(dAtA []byte) (n int, err error) {
l := len(dAtA)
iNdEx := 0
@@ -1949,56 +2578,69 @@
func init() { proto.RegisterFile("raft.proto", fileDescriptorRaft) }
var fileDescriptorRaft = []byte{
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+ // 1009 bytes of a gzipped FileDescriptorProto
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+ 0x70, 0xde, 0xb6, 0xca, 0xc3, 0xb6, 0xbd, 0x84, 0x2a, 0x8f, 0x95, 0x0c, 0x79, 0x4a, 0xab, 0x9d,
+ 0x72, 0xaf, 0xd1, 0x5f, 0x5d, 0x98, 0x8c, 0x3c, 0x94, 0xd5, 0xe0, 0x16, 0x54, 0x46, 0x22, 0x8a,
+ 0x42, 0x45, 0x6b, 0x85, 0x58, 0x16, 0xc3, 0x3e, 0xd4, 0x52, 0xdb, 0x31, 0x5a, 0x37, 0x9d, 0x24,
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+ 0x6a, 0x79, 0xc4, 0x0c, 0xc3, 0x4f, 0x00, 0xb2, 0xd5, 0x61, 0x18, 0x2b, 0xda, 0x28, 0xe4, 0x2c,
+ 0xe0, 0x48, 0xa1, 0x3a, 0x12, 0xb1, 0xe2, 0x37, 0x8a, 0x36, 0xcd, 0xc5, 0xe6, 0xdb, 0xee, 0x0f,
+ 0x50, 0x3f, 0x64, 0xd2, 0xcf, 0xc6, 0x27, 0xef, 0xa0, 0xf3, 0xa0, 0x83, 0x14, 0xbc, 0x6b, 0xa1,
+ 0xf8, 0xe2, 0xbc, 0x6b, 0xa4, 0x50, 0x70, 0xf9, 0x61, 0xc1, 0xdd, 0x3f, 0x1d, 0xa8, 0xcf, 0xe6,
+ 0x15, 0x9f, 0x42, 0x45, 0x9f, 0x91, 0x29, 0x75, 0x3a, 0xe5, 0x9e, 0x37, 0xb4, 0x3b, 0xdc, 0x84,
+ 0xda, 0x84, 0x33, 0x19, 0x6b, 0xc6, 0x35, 0xcc, 0x6c, 0x8f, 0x2f, 0x60, 0x2d, 0x53, 0x5d, 0x88,
+ 0xa9, 0x0a, 0x44, 0x18, 0x07, 0xb4, 0x6c, 0x24, 0xad, 0x0c, 0xfe, 0xd6, 0xa2, 0xf8, 0x1c, 0x56,
+ 0xf3, 0x43, 0x17, 0xb1, 0xae, 0xd4, 0x33, 0xb2, 0x66, 0x0e, 0x9e, 0xf0, 0x1b, 0x85, 0xcf, 0x01,
+ 0xd8, 0x54, 0x89, 0x8b, 0x09, 0x67, 0xd7, 0xdc, 0x0c, 0x43, 0xde, 0xd0, 0xba, 0xc6, 0x8f, 0x35,
+ 0xdc, 0x7d, 0xeb, 0x00, 0x68, 0xd3, 0xfb, 0x57, 0x2c, 0x0e, 0xf4, 0x47, 0xe5, 0x86, 0xbe, 0xed,
+ 0x09, 0x68, 0xed, 0xfd, 0xfb, 0x67, 0xee, 0xd1, 0xc1, 0xd0, 0x0d, 0x7d, 0xfc, 0xc2, 0x8e, 0xb4,
+ 0x6b, 0x46, 0xfa, 0x69, 0xf1, 0x13, 0xcd, 0x4e, 0x3f, 0x98, 0xea, 0x17, 0x50, 0x8d, 0x85, 0xcf,
+ 0x2f, 0x42, 0xdf, 0x36, 0xac, 0x65, 0x43, 0x56, 0x4e, 0x84, 0xcf, 0x8f, 0x0e, 0x86, 0x15, 0x4d,
+ 0x1f, 0xf9, 0xc5, 0x3b, 0xf3, 0x16, 0xef, 0x2c, 0x02, 0x32, 0x4f, 0x70, 0x1a, 0xc6, 0xc1, 0x84,
+ 0xcf, 0x8c, 0x38, 0xff, 0xc5, 0x88, 0xfb, 0x31, 0x23, 0xdd, 0x3f, 0x1c, 0x68, 0xce, 0xe3, 0x9c,
+ 0xf7, 0x71, 0x0f, 0x40, 0x49, 0x16, 0xa7, 0xa1, 0x0a, 0x45, 0x6c, 0x33, 0x6e, 0x3d, 0x92, 0x71,
+ 0xa6, 0xc9, 0x27, 0x72, 0x7e, 0x0a, 0xbf, 0x82, 0xea, 0xc8, 0xa8, 0xb2, 0x1b, 0x2f, 0x3c, 0x29,
+ 0xcb, 0xa5, 0xe5, 0x5f, 0x98, 0x95, 0x17, 0xfb, 0x52, 0x5e, 0xe8, 0xcb, 0xf6, 0x21, 0xd4, 0x67,
+ 0xaf, 0x35, 0xae, 0x41, 0xc3, 0x6c, 0x4e, 0x84, 0x8c, 0xd8, 0x84, 0x94, 0xf0, 0x09, 0xac, 0x19,
+ 0x60, 0x1e, 0x9f, 0x38, 0xf8, 0x3f, 0x58, 0x5f, 0x02, 0xcf, 0xfb, 0xc4, 0xdd, 0xfe, 0xcb, 0x85,
+ 0x46, 0xe1, 0x59, 0x42, 0x80, 0xca, 0x20, 0x0d, 0x0e, 0xa7, 0x09, 0x29, 0x61, 0x03, 0xaa, 0x83,
+ 0x34, 0xd8, 0xe3, 0x4c, 0x11, 0xc7, 0x6e, 0x5e, 0x4b, 0x91, 0x10, 0xd7, 0xaa, 0x76, 0x93, 0x84,
+ 0x94, 0xb1, 0x05, 0x90, 0xad, 0x87, 0x3c, 0x4d, 0x88, 0x67, 0x85, 0xe7, 0x42, 0x71, 0xb2, 0xa2,
+ 0xbd, 0xd9, 0x8d, 0x61, 0x2b, 0x96, 0xd5, 0x4f, 0x00, 0xa9, 0x22, 0x81, 0xa6, 0x4e, 0xc6, 0x99,
+ 0x54, 0x97, 0x3a, 0x4b, 0x0d, 0x37, 0x80, 0x14, 0x11, 0x73, 0xa8, 0x8e, 0x08, 0xad, 0x41, 0x1a,
+ 0xbc, 0x89, 0x25, 0x67, 0xa3, 0x2b, 0x76, 0x39, 0xe1, 0x04, 0x70, 0x1d, 0x56, 0x6d, 0x20, 0xfd,
+ 0xc5, 0x4d, 0x53, 0xd2, 0xb0, 0xb2, 0xfd, 0x2b, 0x3e, 0xfa, 0xe9, 0xbb, 0xa9, 0x90, 0xd3, 0x88,
+ 0x34, 0x75, 0xd9, 0x83, 0x34, 0x30, 0x17, 0x34, 0xe6, 0xf2, 0x98, 0x33, 0x9f, 0x4b, 0xb2, 0x6a,
+ 0x4f, 0x9f, 0x85, 0x11, 0x17, 0x53, 0x75, 0x22, 0x7e, 0x26, 0x2d, 0x6b, 0x66, 0xc8, 0x99, 0x6f,
+ 0x7e, 0x61, 0x64, 0xcd, 0x9a, 0x99, 0x21, 0xc6, 0x0c, 0xb1, 0xf5, 0xbe, 0x96, 0xdc, 0x94, 0xb8,
+ 0x6e, 0xb3, 0xda, 0xbd, 0xd1, 0xe0, 0xf6, 0x6f, 0x0e, 0x6c, 0x3c, 0x36, 0x1e, 0xb8, 0x05, 0xf4,
+ 0x31, 0x7c, 0x77, 0xaa, 0x04, 0x29, 0xe1, 0xa7, 0xf0, 0xff, 0xc7, 0xd8, 0x6f, 0x44, 0x18, 0xab,
+ 0xa3, 0x28, 0x99, 0x84, 0xa3, 0x50, 0x5f, 0xc5, 0xc7, 0x64, 0xaf, 0x6e, 0xac, 0xcc, 0xdd, 0xbe,
+ 0x85, 0xd6, 0xe2, 0x47, 0xa1, 0x9b, 0x31, 0x47, 0x76, 0x7d, 0x5f, 0x8f, 0x3f, 0x29, 0x21, 0x2d,
+ 0x9a, 0x1d, 0xf2, 0x48, 0x5c, 0x73, 0xc3, 0x38, 0x8b, 0xcc, 0x9b, 0xc4, 0x67, 0x2a, 0x63, 0xdc,
+ 0xc5, 0x42, 0x76, 0x7d, 0xff, 0x38, 0x7b, 0x7b, 0x0c, 0x5b, 0xde, 0xa3, 0x77, 0x1f, 0xda, 0xa5,
+ 0x77, 0x1f, 0xda, 0xa5, 0xbb, 0xfb, 0xb6, 0xf3, 0xee, 0xbe, 0xed, 0xfc, 0x7d, 0xdf, 0x76, 0x7e,
+ 0xff, 0xa7, 0x5d, 0xfa, 0x37, 0x00, 0x00, 0xff, 0xff, 0x87, 0x11, 0x6d, 0xd6, 0xaf, 0x08, 0x00,
+ 0x00,
}
diff --git a/vendor/go.etcd.io/etcd/raft/raftpb/raft.proto b/vendor/go.etcd.io/etcd/raft/raftpb/raft.proto
index 644ce7b..23d62ec 100644
--- a/vendor/go.etcd.io/etcd/raft/raftpb/raft.proto
+++ b/vendor/go.etcd.io/etcd/raft/raftpb/raft.proto
@@ -10,8 +10,9 @@
option (gogoproto.goproto_enum_prefix_all) = false;
enum EntryType {
- EntryNormal = 0;
- EntryConfChange = 1;
+ EntryNormal = 0;
+ EntryConfChange = 1; // corresponds to pb.ConfChange
+ EntryConfChangeV2 = 2; // corresponds to pb.ConfChangeV2
}
message Entry {
@@ -75,9 +76,41 @@
optional uint64 commit = 3 [(gogoproto.nullable) = false];
}
+// ConfChangeTransition specifies the behavior of a configuration change with
+// respect to joint consensus.
+enum ConfChangeTransition {
+ // Automatically use the simple protocol if possible, otherwise fall back
+ // to ConfChangeJointImplicit. Most applications will want to use this.
+ ConfChangeTransitionAuto = 0;
+ // Use joint consensus unconditionally, and transition out of them
+ // automatically (by proposing a zero configuration change).
+ //
+ // This option is suitable for applications that want to minimize the time
+ // spent in the joint configuration and do not store the joint configuration
+ // in the state machine (outside of InitialState).
+ ConfChangeTransitionJointImplicit = 1;
+ // Use joint consensus and remain in the joint configuration until the
+ // application proposes a no-op configuration change. This is suitable for
+ // applications that want to explicitly control the transitions, for example
+ // to use a custom payload (via the Context field).
+ ConfChangeTransitionJointExplicit = 2;
+}
+
message ConfState {
- repeated uint64 nodes = 1;
- repeated uint64 learners = 2;
+ // The voters in the incoming config. (If the configuration is not joint,
+ // then the outgoing config is empty).
+ repeated uint64 voters = 1;
+ // The learners in the incoming config.
+ repeated uint64 learners = 2;
+ // The voters in the outgoing config.
+ repeated uint64 voters_outgoing = 3;
+ // The nodes that will become learners when the outgoing config is removed.
+ // These nodes are necessarily currently in nodes_joint (or they would have
+ // been added to the incoming config right away).
+ repeated uint64 learners_next = 4;
+ // If set, the config is joint and Raft will automatically transition into
+ // the final config (i.e. remove the outgoing config) when this is safe.
+ optional bool auto_leave = 5 [(gogoproto.nullable) = false];
}
enum ConfChangeType {
@@ -88,8 +121,57 @@
}
message ConfChange {
- optional uint64 ID = 1 [(gogoproto.nullable) = false];
- optional ConfChangeType Type = 2 [(gogoproto.nullable) = false];
- optional uint64 NodeID = 3 [(gogoproto.nullable) = false];
- optional bytes Context = 4;
+ optional ConfChangeType type = 2 [(gogoproto.nullable) = false];
+ optional uint64 node_id = 3 [(gogoproto.nullable) = false, (gogoproto.customname) = "NodeID" ];
+ optional bytes context = 4;
+
+ // NB: this is used only by etcd to thread through a unique identifier.
+ // Ideally it should really use the Context instead. No counterpart to
+ // this field exists in ConfChangeV2.
+ optional uint64 id = 1 [(gogoproto.nullable) = false, (gogoproto.customname) = "ID" ];
+}
+
+// ConfChangeSingle is an individual configuration change operation. Multiple
+// such operations can be carried out atomically via a ConfChangeV2.
+message ConfChangeSingle {
+ optional ConfChangeType type = 1 [(gogoproto.nullable) = false];
+ optional uint64 node_id = 2 [(gogoproto.nullable) = false, (gogoproto.customname) = "NodeID"];
+}
+
+// ConfChangeV2 messages initiate configuration changes. They support both the
+// simple "one at a time" membership change protocol and full Joint Consensus
+// allowing for arbitrary changes in membership.
+//
+// The supplied context is treated as an opaque payload and can be used to
+// attach an action on the state machine to the application of the config change
+// proposal. Note that contrary to Joint Consensus as outlined in the Raft
+// paper[1], configuration changes become active when they are *applied* to the
+// state machine (not when they are appended to the log).
+//
+// The simple protocol can be used whenever only a single change is made.
+//
+// Non-simple changes require the use of Joint Consensus, for which two
+// configuration changes are run. The first configuration change specifies the
+// desired changes and transitions the Raft group into the joint configuration,
+// in which quorum requires a majority of both the pre-changes and post-changes
+// configuration. Joint Consensus avoids entering fragile intermediate
+// configurations that could compromise survivability. For example, without the
+// use of Joint Consensus and running across three availability zones with a
+// replication factor of three, it is not possible to replace a voter without
+// entering an intermediate configuration that does not survive the outage of
+// one availability zone.
+//
+// The provided ConfChangeTransition specifies how (and whether) Joint Consensus
+// is used, and assigns the task of leaving the joint configuration either to
+// Raft or the application. Leaving the joint configuration is accomplished by
+// proposing a ConfChangeV2 with only and optionally the Context field
+// populated.
+//
+// For details on Raft membership changes, see:
+//
+// [1]: https://github.com/ongardie/dissertation/blob/master/online-trim.pdf
+message ConfChangeV2 {
+ optional ConfChangeTransition transition = 1 [(gogoproto.nullable) = false];
+ repeated ConfChangeSingle changes = 2 [(gogoproto.nullable) = false];
+ optional bytes context = 3;
}