more metrics

metrics.go

@@ -13,18 +13,23 @@ import (
 // metrics are generally used to hold the structure around metrics
 // handling
 type metrics struct {
-	// The channel to pass metrics that should be processed
+	// The channel to pass metrics that should be processed.
 	promRegistry *prometheus.Registry
-	// host and port where prometheus metrics will be exported
+	// host and port where prometheus metrics will be exported.
 	hostAndPort string
+	// Prometheus metrics for total processes.
+	promProcessesTotal prometheus.Gauge
+	// Prometheus metrics for vector of process names.
+	promProcessesAllRunning *prometheus.GaugeVec
+	// Prometheus metrics for number of hello nodes.
+	promHelloNodesTotal prometheus.Gauge
+	// Prometheus metrics for the vector of hello nodes.
+	promHelloNodesContactLast *prometheus.GaugeVec
+	// Prometheus metrics for the last processed DB id in key
+	// value store.
+	promMessagesProcessedTotal prometheus.Gauge
 	//
-	promTotalProcesses prometheus.Gauge
-	//
-	promProcessesVec *prometheus.GaugeVec
-	//
-	promHelloNodes prometheus.Gauge
-	//
-	promHelloNodesNameVec *prometheus.GaugeVec
+	promRingbufferStalledMessagesTotal prometheus.Counter
 }
 
 // newMetrics will prepare and return a *metrics

process.go

@@ -146,7 +146,7 @@ func (p process) spawnWorker(procs *processes, natsConn *nats.Conn) {
 	processName := processNameGet(p.subject.name(), p.processKind)
 
 	// Add prometheus metrics for the process.
-	p.processes.metrics.promProcessesVec.With(prometheus.Labels{"processName": string(processName)})
+	p.processes.metrics.promProcessesAllRunning.With(prometheus.Labels{"processName": string(processName)})
 
 	// Start a publisher worker, which will start a go routine (process)
 	// That will take care of all the messages for the subject it owns.

processes.go

@@ -45,18 +45,18 @@ func newProcesses(ctx context.Context, metrics *metrics) *processes {
 
 	// Register the metrics for the process.
 
-	p.metrics.promTotalProcesses = prometheus.NewGauge(prometheus.GaugeOpts{
-		Name: "total_running_processes",
+	p.metrics.promProcessesTotal = prometheus.NewGauge(prometheus.GaugeOpts{
+		Name: "processes_total",
 		Help: "The current number of total running processes",
 	})
-	metrics.promRegistry.MustRegister(p.metrics.promTotalProcesses)
+	metrics.promRegistry.MustRegister(p.metrics.promProcessesTotal)
 
-	p.metrics.promProcessesVec = prometheus.NewGaugeVec(prometheus.GaugeOpts{
-		Name: "running_process",
-		Help: "Name of the running process",
+	p.metrics.promProcessesAllRunning = prometheus.NewGaugeVec(prometheus.GaugeOpts{
+		Name: "processes_all_running",
+		Help: "Name of the running processes",
 	}, []string{"processName"},
 	)
-	metrics.promRegistry.MustRegister(metrics.promProcessesVec)
+	metrics.promRegistry.MustRegister(metrics.promProcessesAllRunning)
 
 	return &p
 }
@@ -274,18 +274,18 @@ func (s startup) subREQHello(p process) {
 	proc.procFunc = func(ctx context.Context) error {
 		sayHelloNodes := make(map[Node]struct{})
 
-		s.metrics.promHelloNodes = prometheus.NewGauge(prometheus.GaugeOpts{
+		s.metrics.promHelloNodesTotal = prometheus.NewGauge(prometheus.GaugeOpts{
 			Name: "hello_nodes_total",
 			Help: "The current number of total nodes who have said hello",
 		})
-		s.metrics.promRegistry.MustRegister(s.metrics.promHelloNodes)
+		s.metrics.promRegistry.MustRegister(s.metrics.promHelloNodesTotal)
 
-		s.metrics.promHelloNodesNameVec = prometheus.NewGaugeVec(prometheus.GaugeOpts{
+		s.metrics.promHelloNodesContactLast = prometheus.NewGaugeVec(prometheus.GaugeOpts{
 			Name: "hello_node_contact_last",
 			Help: "Name of the nodes who have said hello",
 		}, []string{"nodeName"},
 		)
-		s.metrics.promRegistry.MustRegister(s.metrics.promHelloNodesNameVec)
+		s.metrics.promRegistry.MustRegister(s.metrics.promHelloNodesContactLast)
 
 		for {
 			// Receive a copy of the message sent from the method handler.
@@ -304,8 +304,8 @@ func (s startup) subREQHello(p process) {
 			sayHelloNodes[m.FromNode] = struct{}{}
 
 			// update the prometheus metrics
-			s.metrics.promHelloNodes.Set(float64(len(sayHelloNodes)))
-			s.metrics.promHelloNodesNameVec.With(prometheus.Labels{"nodeName": string(m.FromNode)}).SetToCurrentTime()
+			s.metrics.promHelloNodesTotal.Set(float64(len(sayHelloNodes)))
+			s.metrics.promHelloNodesContactLast.With(prometheus.Labels{"nodeName": string(m.FromNode)}).SetToCurrentTime()
 
 		}
 	}
@@ -365,6 +365,6 @@ func (p *processes) printProcessesMap() {
 	}
 	p.mu.Unlock()
 
-	p.metrics.promTotalProcesses.Set(float64(len(p.active)))
+	p.metrics.promProcessesTotal.Set(float64(len(p.active)))
 
 }

ringbuffer.go

@@ -19,6 +19,7 @@ import (
 	"sync"
 	"time"
 
+	"github.com/prometheus/client_golang/prometheus"
 	bolt "go.etcd.io/bbolt"
 )
 
@@ -46,11 +47,11 @@ type ringBuffer struct {
 	nodeName Node
 	// New messages to the system to be put into the ring buffer.
 	newMessagesCh chan []subjectAndMessage
+	metrics       *metrics
 }
 
 // newringBuffer returns a push/pop storage for values.
-func newringBuffer(c Configuration, size int, dbFileName string, nodeName Node, newMessagesCh chan []subjectAndMessage) *ringBuffer {
-	// ---
+func newringBuffer(metrics *metrics, c Configuration, size int, dbFileName string, nodeName Node, newMessagesCh chan []subjectAndMessage) *ringBuffer {
 	// Check if socket folder exists, if not create it
 	if _, err := os.Stat(c.DatabaseFolder); os.IsNotExist(err) {
 		err := os.MkdirAll(c.DatabaseFolder, 0700)
@@ -69,12 +70,27 @@ func newringBuffer(c Configuration, size int, dbFileName string, nodeName Node,
 		log.Printf("error: failed to open db: %v\n", err)
 		os.Exit(1)
 	}
+
+	// Set up the metrics to be used.
+	metrics.promMessagesProcessedTotal = prometheus.NewGauge(prometheus.GaugeOpts{
+		Name: "messages_processed_total",
+		Help: "The last processed db in key value/store",
+	})
+	metrics.promRegistry.MustRegister(metrics.promMessagesProcessedTotal)
+
+	metrics.promRingbufferStalledMessagesTotal = prometheus.NewCounter(prometheus.CounterOpts{
+		Name: "ringbuffer_stalled_messages_total",
+		Help: "Number of stalled messages in ringbuffer",
+	})
+	metrics.promRegistry.MustRegister(metrics.promRingbufferStalledMessagesTotal)
+
 	return &ringBuffer{
 		bufData:       make(chan samDBValue, size),
 		db:            db,
 		permStore:     make(chan string),
 		nodeName:      nodeName,
 		newMessagesCh: newMessagesCh,
+		metrics:       metrics,
 	}
 }
 
@@ -240,6 +256,8 @@ func (r *ringBuffer) processBufferMessages(samValueBucket string, outCh chan sam
 				// Testing with a timeout here to figure out if messages are stuck
 				// waiting for done signal.
 				log.Printf("Error: *** message %v seems to be stuck, did not receive delivered signal from reading process\n", v.ID)
+
+				r.metrics.promRingbufferStalledMessagesTotal.Inc()
 			}
 			// Listen on the done channel here , so a go routine handling the
 			// message will be able to signal back here that the message have
@@ -248,6 +266,7 @@ func (r *ringBuffer) processBufferMessages(samValueBucket string, outCh chan sam
 			select {
 			case <-v.Data.done:
 				log.Printf("info: processBufferMessages: done with message, deleting key from bucket, %v\n", v.ID)
+				r.metrics.promMessagesProcessedTotal.Set(float64(v.ID))
 				// case <-time.After(time.Second * 3):
 				// 	// Testing with a timeout here to figure out if messages are stuck
 				// 	// waiting for done signal.

server.go

@@ -318,7 +318,7 @@ type samDBValueAndDelivered struct {
 func (s *server) routeMessagesToProcess(dbFileName string, newSAM chan []subjectAndMessage) {
 	// Prepare and start a new ring buffer
 	const bufferSize int = 1000
-	rb := newringBuffer(*s.configuration, bufferSize, dbFileName, Node(s.nodeName), s.toRingbufferCh)
+	rb := newringBuffer(s.metrics, *s.configuration, bufferSize, dbFileName, Node(s.nodeName), s.toRingbufferCh)
 	inCh := make(chan subjectAndMessage)
 	ringBufferOutCh := make(chan samDBValueAndDelivered)
 	// start the ringbuffer.

subscriber_method_types.go

@@ -448,7 +448,7 @@ func (m methodREQOpCommand) handler(proc process, message Message, nodeName stri
 				}
 
 				// Remove the prometheus label
-				proc.processes.metrics.promProcessesVec.Delete(prometheus.Labels{"processName": string(processName)})
+				proc.processes.metrics.promProcessesAllRunning.Delete(prometheus.Labels{"processName": string(processName)})
 
 				er := fmt.Errorf("info: stopProc: stopped %v on %v", sub, message.ToNode)
 				sendErrorLogMessage(proc.toRingbufferCh, proc.node, er)

test.file

@@ -1 +0,0 @@
-some file content