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element
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Use protos for peer info

This commit is contained in:
Michael Crosby 2018-09-18 21:59:54 -04:00
parent 235ddbdc7e
commit 72db99191c
9 changed files with 285 additions and 143 deletions
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4
Makefile Normal file
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@ -0,0 +1,4 @@
PACKAGES=$(shell go list ./... | grep -v /vendor/)
protos:
protobuild --quiet ${PACKAGES}

30
Protobuild.toml Normal file
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@ -0,0 +1,30 @@
version = "unstable"
generator = "gogo"
plugins = []
# Control protoc include paths. Below are usually some good defaults, but feel
# free to try it without them if it works for your project.
[includes]
# Include paths that will be added before all others. Typically, you want to
# treat the root of the project as an include, but this may not be necessary.
# before = ["."]
# Paths that should be treated as include roots in relation to the vendor
# directory. These will be calculated with the vendor directory nearest the
# target package.
# vendored = ["github.com/gogo/protobuf"]
packages = ["github.com/gogo/protobuf"]
# Paths that will be added untouched to the end of the includes. We use
# `/usr/local/include` to pickup the common install location of protobuf.
# This is the default.
after = ["/usr/local/include"]
# This section maps protobuf imports to Go packages. These will become
# `-M` directives in the call to the go protobuf generator.
[packages]
"gogoproto/gogo.proto" = "github.com/gogo/protobuf/gogoproto"
"google/protobuf/any.proto" = "github.com/gogo/protobuf/types"
"google/protobuf/descriptor.proto" = "github.com/gogo/protobuf/protoc-gen-gogo/descriptor"
"google/protobuf/field_mask.proto" = "github.com/gogo/protobuf/types"
"google/protobuf/timestamp.proto" = "github.com/gogo/protobuf/types"

32
agent.go
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@ -25,28 +25,36 @@ type Agent struct {
nodeEventChan chan *NodeEvent
registeredServices map[string]struct{}
memberConfig *memberlist.Config
state *State
}
// NewAgent returns a new node agent
func NewAgent(cfg *Config) (*Agent, error) {
updateCh := make(chan bool)
nodeEventCh := make(chan *NodeEvent)
mc, err := cfg.memberListConfig(updateCh, nodeEventCh)
func NewAgent(info *Peer, cfg *Config) (*Agent, error) {
var (
updateCh = make(chan bool, 64)
nodeEventCh = make(chan *NodeEvent, 64)
)
a := &Agent{
config: cfg,
peerUpdateChan: updateCh,
nodeEventChan: nodeEventCh,
state: &State{
Self: info,
Peers: make(map[string]*Peer),
},
}
mc, err := cfg.memberListConfig(a)
if err != nil {
return nil, err
}
ml, err := memberlist.Create(mc)
if err != nil {
return nil, err
}
return &Agent{
config: cfg,
members: ml,
peerUpdateChan: updateCh,
nodeEventChan: nodeEventCh,
memberConfig: mc,
}, nil
a.members = ml
a.memberConfig = mc
return a, nil
}
// SyncInterval returns the cluster sync interval

14
config.go
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@ -23,10 +23,6 @@ const (
// Config is the agent config
type Config struct {
// NodeName is the name of the node. Each node must have a unique name in the cluster.
NodeName string
// Address on which the agent will serve the GRPC services
Address string
// ConnectionType is the connection type the agent will use
ConnectionType string
// ClusterAddress bind address
@ -37,15 +33,13 @@ type Config struct {
Peers []string
// Debug output for memberlist
Debug bool
// Labels for the peer
Labels map[string]string
}
func (a *Agent) Config() *Config {
return a.config
}
func (cfg *Config) memberListConfig(peerUpdateChan chan bool, nodeEventChan chan *NodeEvent) (*memberlist.Config, error) {
func (cfg *Config) memberListConfig(a *Agent) (*memberlist.Config, error) {
var mc *memberlist.Config
switch cfg.ConnectionType {
case string(Local):
@ -58,9 +52,9 @@ func (cfg *Config) memberListConfig(peerUpdateChan chan bool, nodeEventChan chan
return nil, ErrUnknownConnectionType
}
mc.Name = cfg.NodeName
mc.Delegate = NewAgentDelegate(cfg.NodeName, cfg.Address, cfg.Labels, peerUpdateChan, nodeEventChan)
mc.Events = NewEventHandler(nodeEventChan)
mc.Name = a.state.Self.ID
mc.Delegate = a
mc.Events = a
if !cfg.Debug {
mc.Logger = log.New(ioutil.Discard, "", 0)

80
delegate.go
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@ -1,54 +1,15 @@
package element
import (
"encoding/json"
"time"
"github.com/gogo/protobuf/proto"
"github.com/sirupsen/logrus"
)
type agentDelegate struct {
PeerAgent
Peers map[string]*PeerAgent `json:"peers"`
updateChan chan bool
nodeEventChan chan *NodeEvent
}
// NewAgentDelegate is the agent delegate used to handle cluster events
func NewAgentDelegate(name, addr string, labels map[string]string, updateCh chan bool, nodeEventCh chan *NodeEvent) *agentDelegate {
agent := &agentDelegate{
PeerAgent: PeerAgent{
Name: name,
Addr: addr,
Labels: labels,
},
Peers: make(map[string]*PeerAgent),
updateChan: updateCh,
nodeEventChan: nodeEventCh,
}
// event handler
go func() {
for {
select {
case evt := <-nodeEventCh:
switch evt.EventType {
case NodeJoin:
case NodeUpdate:
case NodeLeave:
agent.removeNode(evt.Node.Name)
}
}
}
}()
return agent
}
// NodeMeta returns local node meta information
func (d *agentDelegate) NodeMeta(limit int) []byte {
data, err := json.Marshal(d.Peers)
func (a *Agent) NodeMeta(limit int) []byte {
data, err := proto.Marshal(a.state)
if err != nil {
logrus.Errorf("error serializing node meta: %s", err)
}
@ -56,46 +17,33 @@ func (d *agentDelegate) NodeMeta(limit int) []byte {
}
// NotifyMsg is used for handling cluster messages
func (d *agentDelegate) NotifyMsg(buf []byte) {
func (a *Agent) NotifyMsg(buf []byte) {
// this can be used to receive messages sent (i.e. SendReliable)
}
// GetBroadcasts is called when user messages can be broadcast
func (d *agentDelegate) GetBroadcasts(overhead, limit int) [][]byte {
func (a *Agent) GetBroadcasts(overhead, limit int) [][]byte {
return nil
}
// LocalState is the local cluster agent state
func (d *agentDelegate) LocalState(join bool) []byte {
data, err := json.Marshal(d)
func (a *Agent) LocalState(join bool) []byte {
data, err := proto.Marshal(a.state)
if err != nil {
logrus.Errorf("error serializing local state: %s", err)
}
return []byte(data)
return data
}
// MergeRemoteState is used to store remote peer information
func (d *agentDelegate) MergeRemoteState(buf []byte, join bool) {
var remoteAgent *agentDelegate
if err := json.Unmarshal(buf, &remoteAgent); err != nil {
func (a *Agent) MergeRemoteState(buf []byte, join bool) {
var state State
if err := proto.Unmarshal(buf, &state); err != nil {
logrus.Errorf("error parsing remote agent state: %s", err)
return
}
d.Updated = time.Now()
d.Peers[remoteAgent.Name] = &PeerAgent{
Name: remoteAgent.Name,
Addr: remoteAgent.Addr,
Updated: d.Updated,
Labels: remoteAgent.Labels,
}
a.state.Updated = time.Now()
a.state.Peers[state.Self.ID] = state.Self
// notify update
d.updateChan <- true
}
func (d *agentDelegate) removeNode(name string) {
if _, exists := d.Peers[name]; exists {
delete(d.Peers, name)
// notify update
d.updateChan <- true
}
a.peerUpdateChan <- true
}

179
element.pb.go Normal file
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@ -0,0 +1,179 @@
// Code generated by protoc-gen-gogo. DO NOT EDIT.
// source: github.com/ehazlett/element/element.proto
package element
import proto "github.com/gogo/protobuf/proto"
import fmt "fmt"
import math "math"
// skipping weak import gogoproto "github.com/gogo/protobuf/gogoproto"
import types "github.com/gogo/protobuf/types"
import time "time"
// Reference imports to suppress errors if they are not otherwise used.
var _ = proto.Marshal
var _ = fmt.Errorf
var _ = math.Inf
var _ = time.Kitchen
// This is a compile-time assertion to ensure that this generated file
// is compatible with the proto package it is being compiled against.
// A compilation error at this line likely means your copy of the
// proto package needs to be updated.
const _ = proto.GoGoProtoPackageIsVersion2 // please upgrade the proto package
type Peer struct {
ID string `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
Address string `protobuf:"bytes,2,opt,name=address,proto3" json:"address,omitempty"`
Labels map[string]string `protobuf:"bytes,3,rep,name=labels" json:"labels,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value,proto3"`
Payload *types.Any `protobuf:"bytes,4,opt,name=payload" json:"payload,omitempty"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *Peer) Reset() { *m = Peer{} }
func (m *Peer) String() string { return proto.CompactTextString(m) }
func (*Peer) ProtoMessage() {}
func (*Peer) Descriptor() ([]byte, []int) {
return fileDescriptor_element_429f8a8a8de0c3bf, []int{0}
}
func (m *Peer) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_Peer.Unmarshal(m, b)
}
func (m *Peer) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_Peer.Marshal(b, m, deterministic)
}
func (dst *Peer) XXX_Merge(src proto.Message) {
xxx_messageInfo_Peer.Merge(dst, src)
}
func (m *Peer) XXX_Size() int {
return xxx_messageInfo_Peer.Size(m)
}
func (m *Peer) XXX_DiscardUnknown() {
xxx_messageInfo_Peer.DiscardUnknown(m)
}
var xxx_messageInfo_Peer proto.InternalMessageInfo
func (m *Peer) GetID() string {
if m != nil {
return m.ID
}
return ""
}
func (m *Peer) GetAddress() string {
if m != nil {
return m.Address
}
return ""
}
func (m *Peer) GetLabels() map[string]string {
if m != nil {
return m.Labels
}
return nil
}
func (m *Peer) GetPayload() *types.Any {
if m != nil {
return m.Payload
}
return nil
}
type State struct {
Self *Peer `protobuf:"bytes,1,opt,name=self" json:"self,omitempty"`
Updated time.Time `protobuf:"bytes,2,opt,name=updated,stdtime" json:"updated"`
Peers map[string]*Peer `protobuf:"bytes,3,rep,name=peers" json:"peers,omitempty" protobuf_key:"bytes,1,opt,name=key,proto3" protobuf_val:"bytes,2,opt,name=value"`
XXX_NoUnkeyedLiteral struct{} `json:"-"`
XXX_unrecognized []byte `json:"-"`
XXX_sizecache int32 `json:"-"`
}
func (m *State) Reset() { *m = State{} }
func (m *State) String() string { return proto.CompactTextString(m) }
func (*State) ProtoMessage() {}
func (*State) Descriptor() ([]byte, []int) {
return fileDescriptor_element_429f8a8a8de0c3bf, []int{1}
}
func (m *State) XXX_Unmarshal(b []byte) error {
return xxx_messageInfo_State.Unmarshal(m, b)
}
func (m *State) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
return xxx_messageInfo_State.Marshal(b, m, deterministic)
}
func (dst *State) XXX_Merge(src proto.Message) {
xxx_messageInfo_State.Merge(dst, src)
}
func (m *State) XXX_Size() int {
return xxx_messageInfo_State.Size(m)
}
func (m *State) XXX_DiscardUnknown() {
xxx_messageInfo_State.DiscardUnknown(m)
}
var xxx_messageInfo_State proto.InternalMessageInfo
func (m *State) GetSelf() *Peer {
if m != nil {
return m.Self
}
return nil
}
func (m *State) GetUpdated() time.Time {
if m != nil {
return m.Updated
}
return time.Time{}
}
func (m *State) GetPeers() map[string]*Peer {
if m != nil {
return m.Peers
}
return nil
}
func init() {
proto.RegisterType((*Peer)(nil), "io.stellar.element.v1.Peer")
proto.RegisterMapType((map[string]string)(nil), "io.stellar.element.v1.Peer.LabelsEntry")
proto.RegisterType((*State)(nil), "io.stellar.element.v1.State")
proto.RegisterMapType((map[string]*Peer)(nil), "io.stellar.element.v1.State.PeersEntry")
}
func init() {
proto.RegisterFile("github.com/ehazlett/element/element.proto", fileDescriptor_element_429f8a8a8de0c3bf)
}
var fileDescriptor_element_429f8a8a8de0c3bf = []byte{
// 368 bytes of a gzipped FileDescriptorProto
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0x7c, 0x49, 0x9c, 0x70, 0xc1, 0xf1, 0x76, 0xc0, 0x49, 0x2a, 0x80, 0x31, 0x9a, 0x90, 0x7a, 0x32,
0x1b, 0x19, 0x3d, 0x9f, 0xfb, 0x5c, 0x2a, 0xac, 0xa2, 0x2a, 0xc5, 0xc6, 0xae, 0xcf, 0xb9, 0xcf,
0xc0, 0x92, 0x9d, 0x9b, 0x4d, 0x2c, 0x1a, 0xe5, 0xd5, 0xc8, 0xfc, 0x3d, 0x12, 0x41, 0x08, 0xa9,
0xa0, 0x61, 0x5c, 0x0a, 0x06, 0x5f, 0x0a, 0x6a, 0xdd, 0x02, 0x24, 0x78, 0x07, 0xa9, 0x81, 0xa7,
0x2b, 0x7d, 0x65, 0xb8, 0x39, 0xee, 0x7c, 0xce, 0x4d, 0xf5, 0xfa, 0xd2, 0x51, 0x03, 0x0f, 0xeb,
0xa8, 0x4b, 0x3d, 0x2f, 0x81, 0x34, 0xd5, 0xd5, 0x62, 0xe8, 0xd4, 0x2d, 0x3e, 0x47, 0x1d, 0x46,
0x5d, 0x60, 0xa9, 0xde, 0xec, 0x37, 0x87, 0x9a, 0xbd, 0x4f, 0x56, 0x42, 0x93, 0x62, 0x3d, 0xb9,
0x91, 0xca, 0xab, 0x48, 0x24, 0xb9, 0x53, 0xd9, 0x30, 0x41, 0xdd, 0x98, 0xe6, 0x8c, 0x53, 0x4f,
0x6f, 0xf5, 0x95, 0xa1, 0x66, 0xf7, 0x48, 0x89, 0x4b, 0x6a, 0x5c, 0x72, 0x11, 0xe5, 0x4e, 0x2d,
0x32, 0x8e, 0x91, 0xb6, 0xb4, 0x06, 0x6f, 0xa1, 0xe6, 0x33, 0xe4, 0x25, 0xb2, 0x53, 0x94, 0xb8,
0x87, 0xda, 0x33, 0xca, 0x32, 0xa8, 0x48, 0xcb, 0xe6, 0x44, 0x3d, 0x52, 0x06, 0xaf, 0x2a, 0x6a,
0xdf, 0x09, 0x2a, 0x00, 0x5b, 0xa8, 0x95, 0x02, 0x9b, 0x48, 0x9b, 0x66, 0xef, 0xfd, 0xc3, 0xec,
0x48, 0x21, 0x3e, 0x43, 0xdd, 0x2c, 0xf6, 0xa8, 0x00, 0x4f, 0xae, 0xd5, 0x6c, 0xe3, 0x0f, 0xe5,
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0xe2, 0x1f, 0x7e, 0x07, 0x00, 0x00, 0xff, 0xff, 0xec, 0x93, 0xe7, 0x1d, 0x96, 0x02, 0x00, 0x00,
}

20
element.proto Normal file
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@ -0,0 +1,20 @@
syntax = "proto3";
package io.stellar.element.v1;
import weak "gogoproto/gogo.proto";
import "google/protobuf/any.proto";
import "google/protobuf/timestamp.proto";
message Peer {
string id = 1 [(gogoproto.customname) = "ID"];
string address = 2;
map<string, string> labels = 3;
google.protobuf.Any payload = 4;
}
message State {
Peer self = 1;
google.protobuf.Timestamp updated = 2 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
map<string, Peer> peers = 3;
}

31
events.go
View File

@ -24,37 +24,16 @@ type NodeEvent struct {
Node *memberlist.Node
}
// EventHandler is used for event handling
type EventHandler struct {
ch chan *NodeEvent
}
// NewEventHandler returns an EventHandler that is used to perform actions for the specified event
func NewEventHandler(ch chan *NodeEvent) *EventHandler {
return &EventHandler{
ch: ch,
}
}
// NotifyJoin notifies when a node joins the cluster
func (h *EventHandler) NotifyJoin(n *memberlist.Node) {
go h.notify(NodeJoin, n)
func (a *Agent) NotifyJoin(n *memberlist.Node) {
}
// NotifyLeave notifies when a node leaves the cluster
func (h *EventHandler) NotifyLeave(n *memberlist.Node) {
go h.notify(NodeLeave, n)
func (a *Agent) NotifyLeave(n *memberlist.Node) {
delete(a.state.Peers, n.Name)
a.peerUpdateChan <- true
}
// NotifyUpdate notifies when a node is updated in the cluster
func (h *EventHandler) NotifyUpdate(n *memberlist.Node) {
go h.notify(NodeUpdate, n)
}
func (h *EventHandler) notify(t NodeEventType, n *memberlist.Node) {
// TODO: use context WithTimeout to enable cancel
h.ch <- &NodeEvent{
EventType: t,
Node: n,
}
func (a *Agent) NotifyUpdate(n *memberlist.Node) {
}

38
peers.go
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@ -1,42 +1,22 @@
package element
import (
"encoding/json"
"time"
)
// PeerAgent is the peer information for an agent in the cluster including name and GRPC address
type PeerAgent struct {
Name string `json:"name"`
Addr string `json:"addr"`
Updated time.Time `json:"updated"`
Labels map[string]string `json:"labels"`
}
import "github.com/gogo/protobuf/proto"
// Peers returns all known peers in the cluster
func (a *Agent) Peers() ([]*PeerAgent, error) {
func (a *Agent) Peers() ([]*Peer, error) {
self := a.members.LocalNode()
var (
peerAgents map[string]*PeerAgent
peers []*PeerAgent
)
if err := json.Unmarshal(self.Meta, &peerAgents); err != nil {
var state State
if err := proto.Unmarshal(self.Meta, &state); err != nil {
return nil, err
}
for _, p := range peerAgents {
var peers []*Peer
for _, p := range state.Peers {
peers = append(peers, p)
}
return peers, nil
}
// LocalNode returns local node peer info
func (a *Agent) LocalNode() (*PeerAgent, error) {
return &PeerAgent{
Name: a.config.NodeName,
Addr: a.config.Address,
Updated: time.Now(),
Labels: a.config.Labels,
}, nil
// Self returns the local peer information
func (a *Agent) Self() *Peer {
return a.state.Self
}