monorepo

Co-authored-by: Malte Poll <mp@edgeless.systems>
Co-authored-by: katexochen <katexochen@users.noreply.github.com>
Co-authored-by: Daniel Weiße <dw@edgeless.systems>
Co-authored-by: Thomas Tendyck <tt@edgeless.systems>
Co-authored-by: Benedict Schlueter <bs@edgeless.systems>
Co-authored-by: leongross <leon.gross@rub.de>
Co-authored-by: Moritz Eckert <m1gh7ym0@gmail.com>

coordinator/kubernetes/k8sapi/systemd.go

@@ -0,0 +1,33 @@
+package k8sapi
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/coreos/go-systemd/v22/dbus"
+)
+
+func RestartSystemdUnit(unit string) error {
+	ctx := context.Background()
+	conn, err := dbus.NewSystemdConnectionContext(ctx)
+	if err != nil {
+		return fmt.Errorf("establishing systemd connection failed: %w", err)
+	}
+
+	restartChan := make(chan string)
+	if _, err := conn.RestartUnitContext(ctx, unit, "replace", restartChan); err != nil {
+		return fmt.Errorf("restarting systemd unit \"%v\" failed: %w", unit, err)
+	}
+
+	// Wait for the restart to finish and actually check if it was
+	// successful or not.
+	result := <-restartChan
+
+	switch result {
+	case "done":
+		return nil
+
+	default:
+		return fmt.Errorf("restarting systemd unit \"%v\" failed: expected %v but received %v", unit, "done", result)
+	}
+}