Pass SIGTERM to the inner process for graceful shutdown

main.go

@@ -8,10 +8,12 @@ import (
 	"net/http"
 	"os"
 	"os/exec"
+	"os/signal"
 	"path/filepath"
 	"slices"
 	"strconv"
 	"strings"
+	"syscall"
 	"time"
 
 	log "github.com/sirupsen/logrus"
@@ -276,6 +278,15 @@ func main() {
 	cmd.Env = innerEnv
 	cmd.Stdout = os.Stdout
 	cmd.Stderr = os.Stderr
+	// Pass SIGTERM to the inner process
+	c := make(chan os.Signal, 1)
+	signal.Notify(c, syscall.SIGTERM)
+	go func() {
+		for sig := range c {
+			log.Info("Passing signal " + sig.String() + " to the inner process")
+			cmd.Process.Signal(sig)
+		}
+	}()
 	cmd.Run()
 
 	log.Info("pg_auto_failover load balancer configurator has completed.")