SIGHUP to trigger reconnect (#199)

* SIGHUP to trigger reconnect

* Go chia libs 0.17.1

go.mod

@@ -3,7 +3,7 @@ module github.com/chia-network/chia-exporter
 go 1.21
 
 require (
-	github.com/chia-network/go-chia-libs v0.17.0
+	github.com/chia-network/go-chia-libs v0.17.1
 	github.com/chia-network/go-modules v0.0.8
 	github.com/go-sql-driver/mysql v1.8.1
 	github.com/oschwald/maxminddb-golang v1.13.1

go.sum

@@ -4,8 +4,8 @@ github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
 github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/chia-network/go-chia-libs v0.17.0 h1:MwzUxprIDyKNWTbac32BGc8G2p6FH8erbaug64xXl8c=
-github.com/chia-network/go-chia-libs v0.17.0/go.mod h1:npTqaFSjTdMxE7hc0LOmWJmWGqcs+IERarK5fDxXk/I=
+github.com/chia-network/go-chia-libs v0.17.1 h1:idFKs8C1DdrmK2AQDBI0SiLWovit1/GxPZ591Jxfau4=
+github.com/chia-network/go-chia-libs v0.17.1/go.mod h1:npTqaFSjTdMxE7hc0LOmWJmWGqcs+IERarK5fDxXk/I=
 github.com/chia-network/go-modules v0.0.8 h1:VATMxehRISOhaRwPo/GL735IKWW0G7sUYH2OmBofsfE=
 github.com/chia-network/go-modules v0.0.8/go.mod h1:OdvlWftyJc3+i3QYv5cfQsiQASL7Em7fJnzdmPmj07M=
 github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=

internal/metrics/metrics.go

@@ -7,6 +7,9 @@ import (
 	"fmt"
 	"net/http"
 	"net/url"
+	"os"
+	"os/signal"
+	"syscall"
 	"time"
 
 	"github.com/go-sql-driver/mysql"
@@ -356,35 +359,55 @@ func (m *Metrics) OpenWebsocket() error {
 
 	m.lastReceive = time.Now()
 	go func() {
-		for {
-			// If we don't get any events for 5 minutes, we'll reset the connection
-			time.Sleep(10 * time.Second)
-			if m.lastReceive.Before(time.Now().Add(-5 * time.Minute)) {
-				cancel()
-				log.Info("Websocket connection seems down. Recreating...")
-				m.disconnectHandler()
-				err := m.setNewClient()
-				if err != nil {
-					log.Errorf("Error creating new client: %s", err.Error())
-					continue
-				}
+		sighup := make(chan os.Signal, 1)
+		signal.Notify(sighup, syscall.SIGHUP)
 
-				err = m.OpenWebsocket()
+		for {
+			select {
+			case <-sighup:
+				log.Info("Got SIGHUP. Recreating websocket connection...")
+				err := m.doTimeoutReconnect(cancel)
 				if err != nil {
-					log.Errorf("Error opening websocket on new client: %s", err.Error())
+					log.Errorf(err.Error())
 					continue
 				}
-
-				// Got the new connection open, so stop the loop on the old connection
-				// since we called this function again and a new loop was created
 				return
+			case <-time.After(10 * time.Second):
+				// If we don't get any events for 5 minutes, we'll reset the connection
+				if m.lastReceive.Before(time.Now().Add(-5 * time.Minute)) {
+					log.Info("Websocket connection seems down. Recreating...")
+					err := m.doTimeoutReconnect(cancel)
+					if err != nil {
+						log.Errorf(err.Error())
+						continue
+					}
+					return
+				}
 			}
 		}
 	}()
 
 	return nil
 }
 
+func (m *Metrics) doTimeoutReconnect(cancel context.CancelFunc) error {
+	cancel()
+	m.disconnectHandler()
+	err := m.setNewClient()
+	if err != nil {
+		return fmt.Errorf("error creating new client: %w", err)
+	}
+
+	err = m.OpenWebsocket()
+	if err != nil {
+		return fmt.Errorf("error opening websocket on new client: %w", err)
+	}
+
+	// Got the new connection open, so stop the loop on the old connection
+	// since we called this function again and a new loop was created
+	return nil
+}
+
 // CloseWebsocket closes the websocket connection
 func (m *Metrics) CloseWebsocket() error {
 	return m.client.Close()