Add error to reboot interface

Without this, impossible to bubble up errors to main

Signed-off-by: Jean-Philippe Evrard <open-source@a.spamming.party>

cmd/kured/main.go

@@ -710,7 +710,11 @@ func rebootAsRequired(nodeID string, rebooter reboot.Rebooter, checker checkers.
 			}
 		}
 		log.Infof("Triggering reboot for node %v", nodeID)
-		rebooter.Reboot()
+
+		err = rebooter.Reboot()
+		if err != nil {
+			log.Fatalf("Unable to reboot node: %v", err)
+		}
 		for {
 			log.Infof("Waiting for reboot")
 			time.Sleep(time.Minute)

pkg/reboot/command.go

@@ -13,11 +13,12 @@ type CommandRebooter struct {
 }
 
 // Reboot triggers the reboot command
-func (c CommandRebooter) Reboot() {
+func (c CommandRebooter) Reboot() error {
 	log.Infof("Invoking command: %s", c.RebootCommand)
 	if err := util.NewCommand(c.RebootCommand[0], c.RebootCommand[1:]...).Run(); err != nil {
-		log.Fatalf("Error invoking reboot command: %v", err)
+		return fmt.Errorf("error invoking reboot command %s: %v", c.RebootCommand, err)
 	}
+	return nil
 }
 
 // NewCommandRebooter is the constructor to create a CommandRebooter from a string not

pkg/reboot/reboot.go

@@ -10,7 +10,7 @@ import (
 // The Reboot method does not expect any return, yet should
 // most likely be refactored in the future to return an error
 type Rebooter interface {
-	Reboot()
+	Reboot() error
 }
 
 // NewRebooter validates the rebootMethod, rebootCommand, and rebootSignal input,

pkg/reboot/signal.go

@@ -4,8 +4,6 @@ import (
 	"fmt"
 	"os"
 	"syscall"
-
-	log "github.com/sirupsen/logrus"
 )
 
 // SignalRebooter holds context-information for a signal reboot.
@@ -14,20 +12,19 @@ type SignalRebooter struct {
 }
 
 // Reboot triggers the reboot signal
-func (c SignalRebooter) Reboot() {
-	log.Infof("Invoking signal: %v", c.Signal)
-
+func (c SignalRebooter) Reboot() error {
 	process, err := os.FindProcess(1)
 	if err != nil {
-		log.Fatalf("Not running on Unix: %v", err)
+		return fmt.Errorf("not running on Unix: %v", err)
 	}
 
 	err = process.Signal(syscall.Signal(c.Signal))
 	// Either PID does not exist, or the signal does not work. Hoping for
 	// a decent enough error.
 	if err != nil {
-		log.Fatalf("Signal of SIGRTMIN+5 failed: %v", err)
+		return fmt.Errorf("signal of SIGRTMIN+5 failed: %v", err)
 	}
+	return nil
 }
 
 // NewSignalRebooter is the constructor which sets the signal number.