Add labels for peers

Signed-off-by: Michael Crosby <crosbymichael@gmail.com>

config.go

@@ -37,6 +37,8 @@ type Config struct {
 	Peers []string
 	// Debug output for memberlist
 	Debug bool
+	// Labels for the peer
+	Labels map[string]string
 }
 
 func (a *Agent) Config() *Config {
@@ -57,7 +59,7 @@ func (cfg *Config) memberListConfig(peerUpdateChan chan bool, nodeEventChan chan
 	}
 
 	mc.Name = cfg.NodeName
-	mc.Delegate = NewAgentDelegate(cfg.NodeName, cfg.Address, peerUpdateChan, nodeEventChan)
+	mc.Delegate = NewAgentDelegate(cfg.NodeName, cfg.Address, cfg.Labels, peerUpdateChan, nodeEventChan)
 	mc.Events = NewEventHandler(nodeEventChan)
 
 	if !cfg.Debug {

delegate.go

@@ -8,19 +8,21 @@ import (
 )
 
 type agentDelegate struct {
-	Name          string
-	Addr          string
-	Updated       time.Time
-	Peers         map[string]*PeerAgent
+	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, updateCh chan bool, nodeEventCh chan *NodeEvent) *agentDelegate {
+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,
@@ -83,7 +85,8 @@ func (d *agentDelegate) MergeRemoteState(buf []byte, join bool) {
 	d.Peers[remoteAgent.Name] = &PeerAgent{
 		Name:    remoteAgent.Name,
 		Addr:    remoteAgent.Addr,
-		Updated: time.Now(),
+		Updated: d.Updated,
+		Labels:  remoteAgent.Labels,
 	}
 	// notify update
 	d.updateChan <- true

peers.go

@@ -7,9 +7,10 @@ import (
 
 // PeerAgent is the peer information for an agent in the cluster including name and GRPC address
 type PeerAgent struct {
-	Name    string
-	Addr    string
-	Updated time.Time
+	Name    string            `json:"name"`
+	Addr    string            `json:"addr"`
+	Updated time.Time         `json:"updated"`
+	Labels  map[string]string `json:"labels"`
 }
 
 // Peers returns all known peers in the cluster
@@ -36,5 +37,6 @@ func (a *Agent) LocalNode() (*PeerAgent, error) {
 		Name:    a.config.NodeName,
 		Addr:    a.config.Address,
 		Updated: time.Now(),
+		Labels:  a.config.Labels,
 	}, nil
 }