Added getinfo

Signed-off-by: Ben Wilson <ben@z.cash>

collector.go

@@ -6,6 +6,18 @@ import (
 
 //Define the metrics we wish to expose
 var (
+	zcashdBlockchainInfo = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "zcash_network",
+			Help: "Current network name as defined in BIP70"},
+		[]string{"network", "blocks"},
+	)
+	zcashdInfo = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "zcashd_info",
+			Help: "Node state info"},
+		[]string{"version"},
+	)
 	zcashdBlocks = prometheus.NewGauge(prometheus.GaugeOpts{
 		Name: "zcash_blocks", Help: "the current number of blocks processed in the server"})
 	zcashdDifficulty = prometheus.NewGauge(prometheus.GaugeOpts{
@@ -78,6 +90,8 @@ var (
 
 func init() {
 	//Register metrics with prometheus
+	prometheus.MustRegister(zcashdBlockchainInfo)
+	prometheus.MustRegister(zcashdInfo)
 	prometheus.MustRegister(zcashdBlocks)
 	prometheus.MustRegister(zcashdDifficulty)
 	prometheus.MustRegister(zcashdSizeOnDisk)

main.go

@@ -52,6 +52,7 @@ func main() {
 		</body>
 		</html>`))
 	})
+	go getInfo()
 	go getBlockchainInfo()
 	go getMemPoolInfo()
 	go getWalletInfo()
@@ -63,6 +64,27 @@ func main() {
 
 }
 
+func getInfo() {
+	basicAuth := base64.StdEncoding.EncodeToString([]byte(*rpcUser + ":" + *rpcPassword))
+	rpcClient := jsonrpc.NewClientWithOpts("http://"+*rpcHost+":"+*rpcPort,
+		&jsonrpc.RPCClientOpts{
+			CustomHeaders: map[string]string{
+				"Authorization": "Basic " + basicAuth,
+			}})
+	var info *GetInfo
+
+	for {
+		if err := rpcClient.CallFor(&info, "getinfo"); err != nil {
+			log.Warnln("Error calling getinfo", err)
+		} else {
+			zcashdInfo.WithLabelValues(
+				strconv.Itoa(info.Version)).Set(1)
+		}
+		time.Sleep(time.Duration(30) * time.Second)
+	}
+
+}
+
 func getBlockchainInfo() {
 	basicAuth := base64.StdEncoding.EncodeToString([]byte(*rpcUser + ":" + *rpcPassword))
 	rpcClient := jsonrpc.NewClientWithOpts("http://"+*rpcHost+":"+*rpcPort,
@@ -76,6 +98,10 @@ func getBlockchainInfo() {
 		if err := rpcClient.CallFor(&blockinfo, "getblockchaininfo"); err != nil {
 			log.Warnln("Error calling getblockchaininfo", err)
 		} else {
+
+			zcashdBlockchainInfo.WithLabelValues(
+				blockinfo.Chain, strconv.Itoa(blockinfo.Blocks)).Set(1)
+
 			zcashdBlocks.Set(float64(blockinfo.Blocks))
 			zcashdDifficulty.Set(blockinfo.Difficulty)
 			zcashdVerificationProgress.Set(blockinfo.VerificationProgress)

rpc.go

@@ -10,6 +10,12 @@ type GetBlockchainInfo struct {
 	SizeOnDisk           float64 `json:"size_on_disk"`
 }
 
+// GetInfo Returns an object containing various state info.
+// https://zcash-rpc.github.io/getinfo.html
+type GetInfo struct {
+	Version int `json:"version"`
+}
+
 // GetMemPoolInfo return the zcashd rpc `getmempoolinfo`
 // https://zcash-rpc.github.io/getmempoolinfo.html
 type GetMemPoolInfo struct {