dashfolders: allows phantomjs rendering for alerting

Makes the alerting user an admin when rendering a png
for emails

pkg/components/renderer/renderer.go

@@ -29,6 +29,7 @@ type RenderOpts struct {
 	UserId         int64
 	OrgRole        models.RoleType
 	Timezone       string
+	IsAlertContext bool
 }
 
 var rendererLog log.Logger = log.New("png-renderer")
@@ -75,7 +76,11 @@ func RenderToPng(params *RenderOpts) (string, error) {
 	pngPath, _ := filepath.Abs(filepath.Join(setting.ImagesDir, util.GetRandomString(20)))
 	pngPath = pngPath + ".png"
 
-	renderKey := middleware.AddRenderAuthKey(params.OrgId, params.UserId, params.OrgRole)
+	orgRole := params.OrgRole
+	if params.IsAlertContext {
+		orgRole = models.ROLE_ADMIN
+	}
+	renderKey := middleware.AddRenderAuthKey(params.OrgId, params.UserId, orgRole)
 	defer middleware.RemoveRenderAuthKey(renderKey)
 
 	cmdArgs := []string{

pkg/services/alerting/notifier.go

@@ -83,6 +83,7 @@ func (n *notificationService) uploadImage(context *EvalContext) (err error) {
 		Height:         "400",
 		Timeout:        "30",
 		OrgId:          context.Rule.OrgId,
+		IsAlertContext: true,
 	}
 
 	if slug, err := context.GetDashboardSlug(); err != nil {