mirror of
https://github.com/etcd-io/etcd.git
synced 2024-09-27 06:25:44 +00:00
raft: introduce protos for joint quorums
This commit is contained in:
Tobias Schottdorf
parent
fe86a786a4
commit
10680744b9
@ -15,6 +15,8 @@
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HardState
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ConfState
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ConfChange
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ConfChangeSingle
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ConfChangeV2
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*/
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package raftpb
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@ -44,17 +46,20 @@ const _ = proto.ProtoPackageIsVersion2 // please upgrade the proto package
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type EntryType int32
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const (
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EntryNormal EntryType = 0
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EntryConfChange EntryType = 1
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EntryNormal EntryType = 0
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EntryConfChange EntryType = 1
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EntryConfChangeV2 EntryType = 2
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)
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var EntryType_name = map[int32]string{
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0: "EntryNormal",
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1: "EntryConfChange",
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2: "EntryConfChangeV2",
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}
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var EntryType_value = map[string]int32{
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"EntryNormal": 0,
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"EntryConfChange": 1,
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"EntryNormal": 0,
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"EntryConfChange": 1,
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"EntryConfChangeV2": 2,
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}
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func (x EntryType) Enum() *EntryType {
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@ -160,6 +165,51 @@ func (x *MessageType) UnmarshalJSON(data []byte) error {
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}
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func (MessageType) EnumDescriptor() ([]byte, []int) { return fileDescriptorRaft, []int{1} }
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// ConfChangeTransition specifies the behavior of a configuration change with
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// respect to joint consensus.
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type ConfChangeTransition int32
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const (
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// Automatically use the simple protocol if possible, otherwise fall back
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// to ConfChangeJointImplicit.
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ConfChangeTransitionAuto ConfChangeTransition = 0
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// Use joint consensus, but transition out of the joint configuration
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// automatically by proposing a no-op configuration change.
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ConfChangeTransitionJointImplicit ConfChangeTransition = 1
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// Use joint consensus and remain in the joint configuration until the
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// application proposes a no-op configuration change.
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ConfChangeTransitionJointExplicit ConfChangeTransition = 2
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)
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var ConfChangeTransition_name = map[int32]string{
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0: "ConfChangeTransitionAuto",
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1: "ConfChangeTransitionJointImplicit",
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2: "ConfChangeTransitionJointExplicit",
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}
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var ConfChangeTransition_value = map[string]int32{
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"ConfChangeTransitionAuto": 0,
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"ConfChangeTransitionJointImplicit": 1,
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"ConfChangeTransitionJointExplicit": 2,
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}
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func (x ConfChangeTransition) Enum() *ConfChangeTransition {
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p := new(ConfChangeTransition)
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*p = x
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return p
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}
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func (x ConfChangeTransition) String() string {
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return proto.EnumName(ConfChangeTransition_name, int32(x))
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}
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func (x *ConfChangeTransition) UnmarshalJSON(data []byte) error {
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value, err := proto.UnmarshalJSONEnum(ConfChangeTransition_value, data, "ConfChangeTransition")
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if err != nil {
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return err
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}
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*x = ConfChangeTransition(value)
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return nil
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}
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func (ConfChangeTransition) EnumDescriptor() ([]byte, []int) { return fileDescriptorRaft, []int{2} }
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type ConfChangeType int32
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const (
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@ -198,7 +248,7 @@ func (x *ConfChangeType) UnmarshalJSON(data []byte) error {
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*x = ConfChangeType(value)
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return nil
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}
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func (ConfChangeType) EnumDescriptor() ([]byte, []int) { return fileDescriptorRaft, []int{2} }
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func (ConfChangeType) EnumDescriptor() ([]byte, []int) { return fileDescriptorRaft, []int{3} }
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type Entry struct {
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Term uint64 `protobuf:"varint,2,opt,name=Term" json:"Term"`
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@ -271,7 +321,10 @@ func (*HardState) Descriptor() ([]byte, []int) { return fileDescriptorRaft, []in
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type ConfState struct {
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Nodes []uint64 `protobuf:"varint,1,rep,name=nodes" json:"nodes,omitempty"`
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NodesJoint []uint64 `protobuf:"varint,3,rep,name=nodes_joint,json=nodesJoint" json:"nodes_joint,omitempty"`
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Learners []uint64 `protobuf:"varint,2,rep,name=learners" json:"learners,omitempty"`
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LearnersNext []uint64 `protobuf:"varint,4,rep,name=learners_next,json=learnersNext" json:"learners_next,omitempty"`
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AutoLeave bool `protobuf:"varint,5,opt,name=auto_leave,json=autoLeave" json:"auto_leave"`
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XXX_unrecognized []byte `json:"-"`
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}
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@ -281,11 +334,14 @@ func (*ConfState) ProtoMessage() {}
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func (*ConfState) Descriptor() ([]byte, []int) { return fileDescriptorRaft, []int{5} }
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type ConfChange struct {
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ID uint64 `protobuf:"varint,1,opt,name=ID" json:"ID"`
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Type ConfChangeType `protobuf:"varint,2,opt,name=Type,enum=raftpb.ConfChangeType" json:"Type"`
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NodeID uint64 `protobuf:"varint,3,opt,name=NodeID" json:"NodeID"`
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Context []byte `protobuf:"bytes,4,opt,name=Context" json:"Context,omitempty"`
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XXX_unrecognized []byte `json:"-"`
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Type ConfChangeType `protobuf:"varint,2,opt,name=type,enum=raftpb.ConfChangeType" json:"type"`
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NodeID uint64 `protobuf:"varint,3,opt,name=node_id,json=nodeId" json:"node_id"`
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Context []byte `protobuf:"bytes,4,opt,name=context" json:"context,omitempty"`
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// NB: this is used only by etcd to thread through a unique identifier.
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// Ideally it should really use the Context instead. No counterpart to
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// this field exists in ConfChangeV2.
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ID uint64 `protobuf:"varint,1,opt,name=id" json:"id"`
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XXX_unrecognized []byte `json:"-"`
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}
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func (m *ConfChange) Reset() { *m = ConfChange{} }
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@ -293,6 +349,63 @@ func (m *ConfChange) String() string { return proto.CompactTextString
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func (*ConfChange) ProtoMessage() {}
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func (*ConfChange) Descriptor() ([]byte, []int) { return fileDescriptorRaft, []int{6} }
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// ConfChangeSingle is an individual configuration change operation. Multiple
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// such operations can be carried out atomically via a ConfChangeV2.
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type ConfChangeSingle struct {
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Type ConfChangeType `protobuf:"varint,1,opt,name=type,enum=raftpb.ConfChangeType" json:"type"`
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NodeID uint64 `protobuf:"varint,2,opt,name=node_id,json=nodeId" json:"node_id"`
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XXX_unrecognized []byte `json:"-"`
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}
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func (m *ConfChangeSingle) Reset() { *m = ConfChangeSingle{} }
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func (m *ConfChangeSingle) String() string { return proto.CompactTextString(m) }
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func (*ConfChangeSingle) ProtoMessage() {}
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func (*ConfChangeSingle) Descriptor() ([]byte, []int) { return fileDescriptorRaft, []int{7} }
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// ConfChangeV2 messages initiate configuration changes. They support both the
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// simple "one at a time" membership change protocol and full Joint Consensus
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// allowing for arbitrary changes in membership.
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//
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// The supplied context is treated as an opaque payload and can be used to
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// attach an action on the state machine to the application of the config change
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// proposal. Note that contrary to Joint Consensus as outlined in the Raft
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// paper[1], configuration changes become active when they are *applied* to the
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// state machine (not when they are appended to the log).
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//
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// The simple protocol can be used whenever only a single change is made.
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//
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// Non-simple changes require the use of Joint Consensus, for which two
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// configuration changes are run. The first configuration change specifies the
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// desired changes and transitions the Raft group into the joint configuration,
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// in which quorum requires a majority of both the pre-changes and post-changes
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// configuration. Joint Consensus avoids entering fragile intermediate
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// configurations that could compromise survivability. For example, without the
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// use of Joint Consensus and running across three availability zones with a
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// replication factor of three, it is not possible to replace a voter without
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// entering an intermediate configuration that does not survive the outage of
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// one availability zone.
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//
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// The provided ConfChangeTransition specifies how (and whether) Joint Consensus
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// is used, and assigns the task of leaving the joint configuration either to
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// Raft or the application. Leaving the joint configuration is accomplished by
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// proposing a ConfChangeV2 with only and optionally the Context field
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// populated.
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//
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// For details on Raft membership changes, see:
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//
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// [1]: https://github.com/ongardie/dissertation/blob/master/online-trim.pdf
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type ConfChangeV2 struct {
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Transition ConfChangeTransition `protobuf:"varint,1,opt,name=transition,enum=raftpb.ConfChangeTransition" json:"transition"`
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Changes []ConfChangeSingle `protobuf:"bytes,2,rep,name=changes" json:"changes"`
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Context []byte `protobuf:"bytes,3,opt,name=context" json:"context,omitempty"`
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XXX_unrecognized []byte `json:"-"`
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}
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func (m *ConfChangeV2) Reset() { *m = ConfChangeV2{} }
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func (m *ConfChangeV2) String() string { return proto.CompactTextString(m) }
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func (*ConfChangeV2) ProtoMessage() {}
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func (*ConfChangeV2) Descriptor() ([]byte, []int) { return fileDescriptorRaft, []int{8} }
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func init() {
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proto.RegisterType((*Entry)(nil), "raftpb.Entry")
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proto.RegisterType((*SnapshotMetadata)(nil), "raftpb.SnapshotMetadata")
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@ -301,8 +414,11 @@ func init() {
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proto.RegisterType((*HardState)(nil), "raftpb.HardState")
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proto.RegisterType((*ConfState)(nil), "raftpb.ConfState")
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proto.RegisterType((*ConfChange)(nil), "raftpb.ConfChange")
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proto.RegisterType((*ConfChangeSingle)(nil), "raftpb.ConfChangeSingle")
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proto.RegisterType((*ConfChangeV2)(nil), "raftpb.ConfChangeV2")
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proto.RegisterEnum("raftpb.EntryType", EntryType_name, EntryType_value)
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proto.RegisterEnum("raftpb.MessageType", MessageType_name, MessageType_value)
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proto.RegisterEnum("raftpb.ConfChangeTransition", ConfChangeTransition_name, ConfChangeTransition_value)
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proto.RegisterEnum("raftpb.ConfChangeType", ConfChangeType_name, ConfChangeType_value)
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}
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func (m *Entry) Marshal() (dAtA []byte, err error) {
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@ -549,6 +665,28 @@ func (m *ConfState) MarshalTo(dAtA []byte) (int, error) {
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i = encodeVarintRaft(dAtA, i, uint64(num))
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}
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}
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if len(m.NodesJoint) > 0 {
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for _, num := range m.NodesJoint {
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dAtA[i] = 0x18
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i++
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i = encodeVarintRaft(dAtA, i, uint64(num))
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}
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}
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if len(m.LearnersNext) > 0 {
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for _, num := range m.LearnersNext {
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dAtA[i] = 0x20
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i++
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i = encodeVarintRaft(dAtA, i, uint64(num))
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}
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}
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dAtA[i] = 0x28
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i++
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if m.AutoLeave {
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dAtA[i] = 1
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} else {
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dAtA[i] = 0
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}
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i++
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if m.XXX_unrecognized != nil {
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i += copy(dAtA[i:], m.XXX_unrecognized)
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}
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@ -591,6 +729,75 @@ func (m *ConfChange) MarshalTo(dAtA []byte) (int, error) {
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return i, nil
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}
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func (m *ConfChangeSingle) Marshal() (dAtA []byte, err error) {
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size := m.Size()
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dAtA = make([]byte, size)
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n, err := m.MarshalTo(dAtA)
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if err != nil {
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return nil, err
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}
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return dAtA[:n], nil
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}
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func (m *ConfChangeSingle) MarshalTo(dAtA []byte) (int, error) {
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var i int
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_ = i
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var l int
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_ = l
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dAtA[i] = 0x8
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i++
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i = encodeVarintRaft(dAtA, i, uint64(m.Type))
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dAtA[i] = 0x10
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i++
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i = encodeVarintRaft(dAtA, i, uint64(m.NodeID))
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if m.XXX_unrecognized != nil {
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i += copy(dAtA[i:], m.XXX_unrecognized)
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}
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return i, nil
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}
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func (m *ConfChangeV2) Marshal() (dAtA []byte, err error) {
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size := m.Size()
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dAtA = make([]byte, size)
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n, err := m.MarshalTo(dAtA)
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if err != nil {
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return nil, err
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}
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return dAtA[:n], nil
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}
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func (m *ConfChangeV2) MarshalTo(dAtA []byte) (int, error) {
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var i int
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_ = i
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var l int
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_ = l
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dAtA[i] = 0x8
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i++
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i = encodeVarintRaft(dAtA, i, uint64(m.Transition))
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if len(m.Changes) > 0 {
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for _, msg := range m.Changes {
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dAtA[i] = 0x12
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i++
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i = encodeVarintRaft(dAtA, i, uint64(msg.Size()))
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n, err := msg.MarshalTo(dAtA[i:])
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if err != nil {
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return 0, err
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}
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i += n
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}
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}
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if m.Context != nil {
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dAtA[i] = 0x1a
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i++
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i = encodeVarintRaft(dAtA, i, uint64(len(m.Context)))
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i += copy(dAtA[i:], m.Context)
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}
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if m.XXX_unrecognized != nil {
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i += copy(dAtA[i:], m.XXX_unrecognized)
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}
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return i, nil
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}
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func encodeVarintRaft(dAtA []byte, offset int, v uint64) int {
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for v >= 1<<7 {
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dAtA[offset] = uint8(v&0x7f | 0x80)
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@ -699,6 +906,17 @@ func (m *ConfState) Size() (n int) {
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n += 1 + sovRaft(uint64(e))
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}
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}
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if len(m.NodesJoint) > 0 {
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for _, e := range m.NodesJoint {
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n += 1 + sovRaft(uint64(e))
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}
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}
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if len(m.LearnersNext) > 0 {
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for _, e := range m.LearnersNext {
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n += 1 + sovRaft(uint64(e))
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}
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}
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n += 2
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if m.XXX_unrecognized != nil {
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n += len(m.XXX_unrecognized)
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}
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@ -721,6 +939,37 @@ func (m *ConfChange) Size() (n int) {
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return n
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}
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func (m *ConfChangeSingle) Size() (n int) {
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var l int
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_ = l
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n += 1 + sovRaft(uint64(m.Type))
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n += 1 + sovRaft(uint64(m.NodeID))
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if m.XXX_unrecognized != nil {
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n += len(m.XXX_unrecognized)
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}
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return n
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}
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func (m *ConfChangeV2) Size() (n int) {
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var l int
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_ = l
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n += 1 + sovRaft(uint64(m.Transition))
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if len(m.Changes) > 0 {
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for _, e := range m.Changes {
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l = e.Size()
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n += 1 + l + sovRaft(uint64(l))
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}
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}
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if m.Context != nil {
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l = len(m.Context)
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n += 1 + l + sovRaft(uint64(l))
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}
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if m.XXX_unrecognized != nil {
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n += len(m.XXX_unrecognized)
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}
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return n
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}
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func sovRaft(x uint64) (n int) {
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for {
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n++
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@ -1680,6 +1929,150 @@ func (m *ConfState) Unmarshal(dAtA []byte) error {
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} else {
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return fmt.Errorf("proto: wrong wireType = %d for field Learners", wireType)
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}
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case 3:
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if wireType == 0 {
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var v uint64
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for shift := uint(0); ; shift += 7 {
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if shift >= 64 {
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return ErrIntOverflowRaft
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}
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if iNdEx >= l {
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return io.ErrUnexpectedEOF
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}
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b := dAtA[iNdEx]
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iNdEx++
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v |= (uint64(b) & 0x7F) << shift
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if b < 0x80 {
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break
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}
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}
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m.NodesJoint = append(m.NodesJoint, v)
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} else if wireType == 2 {
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var packedLen int
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for shift := uint(0); ; shift += 7 {
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if shift >= 64 {
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return ErrIntOverflowRaft
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}
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if iNdEx >= l {
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return io.ErrUnexpectedEOF
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}
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b := dAtA[iNdEx]
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iNdEx++
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packedLen |= (int(b) & 0x7F) << shift
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if b < 0x80 {
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break
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}
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}
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if packedLen < 0 {
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return ErrInvalidLengthRaft
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}
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postIndex := iNdEx + packedLen
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if postIndex > l {
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return io.ErrUnexpectedEOF
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}
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for iNdEx < postIndex {
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var v uint64
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for shift := uint(0); ; shift += 7 {
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if shift >= 64 {
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return ErrIntOverflowRaft
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}
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if iNdEx >= l {
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return io.ErrUnexpectedEOF
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}
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b := dAtA[iNdEx]
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iNdEx++
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v |= (uint64(b) & 0x7F) << shift
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if b < 0x80 {
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break
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}
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}
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m.NodesJoint = append(m.NodesJoint, v)
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}
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} else {
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return fmt.Errorf("proto: wrong wireType = %d for field NodesJoint", wireType)
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}
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case 4:
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if wireType == 0 {
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var v uint64
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for shift := uint(0); ; shift += 7 {
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if shift >= 64 {
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return ErrIntOverflowRaft
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}
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if iNdEx >= l {
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return io.ErrUnexpectedEOF
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}
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b := dAtA[iNdEx]
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iNdEx++
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v |= (uint64(b) & 0x7F) << shift
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if b < 0x80 {
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break
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}
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}
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m.LearnersNext = append(m.LearnersNext, v)
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} else if wireType == 2 {
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var packedLen int
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for shift := uint(0); ; shift += 7 {
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if shift >= 64 {
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return ErrIntOverflowRaft
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}
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if iNdEx >= l {
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return io.ErrUnexpectedEOF
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}
|
||||
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 +2234,227 @@ func (m *ConfChange) Unmarshal(dAtA []byte) error {
|
||||
}
|
||||
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 +2563,68 @@ var (
|
||||
func init() { proto.RegisterFile("raft.proto", fileDescriptorRaft) }
|
||||
|
||||
var fileDescriptorRaft = []byte{
|
||||
// 815 bytes of a gzipped FileDescriptorProto
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
0xbb, 0xba, 0x9b, 0xfc, 0xc9, 0x5f, 0x4d, 0xe8, 0xcc, 0x28, 0xcf, 0x45, 0x4c, 0xf8, 0x1c, 0x02,
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
0xb3, 0x9a, 0x3a, 0xff, 0xe2, 0x0c, 0xbf, 0x70, 0x1f, 0xae, 0x6f, 0xd7, 0xea, 0xe3, 0xea, 0x67,
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
// 999 bytes of a gzipped FileDescriptorProto
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
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||||
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|
||||
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|
||||
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|
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|
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
0x46, 0xff, 0x3c, 0xb4, 0xd1, 0x1f, 0xff, 0xb6, 0x0b, 0xff, 0x05, 0x00, 0x00, 0xff, 0xff, 0x39,
|
||||
0x56, 0x89, 0xed, 0xa5, 0x08, 0x00, 0x00,
|
||||
}
|
||||
|
||||
@ -10,8 +10,9 @@ option (gogoproto.goproto_getters_all) = false;
|
||||
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 @@ message HardState {
|
||||
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 nodes = 1;
|
||||
// The voters in the outgoing config.
|
||||
repeated uint64 nodes_joint = 3;
|
||||
// The learners in the incoming config.
|
||||
repeated uint64 learners = 2;
|
||||
// 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 @@ enum ConfChangeType {
|
||||
}
|
||||
|
||||
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;
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user