Add secondary IOL NVRAM bind. (#2263)

* Add second IOL NVRAM bind

* Change nvram file paths and iol workdir to consts

nodes/iol/iol.go

@@ -28,6 +28,10 @@ import (
 const (
 	typeIOL = "iol"
 	typeL2  = "l2"
+
+	iol_workdir = "/iol"
+	nvram_file1 = "nvram_00001"
+	nvram_file2 = "nvram_00003"
 )
 
 var (
@@ -95,7 +99,8 @@ func (n *iol) Init(cfg *types.NodeConfig, opts ...nodes.NodeOption) error {
 
 	n.Cfg.Binds = append(n.Cfg.Binds,
 		// mount nvram so that config persists
-		fmt.Sprint(path.Join(n.Cfg.LabDir, "nvram"), ":/iol/nvram_00001"),
+		fmt.Sprint(path.Join(n.Cfg.LabDir, nvram_file1), ":", path.Join(iol_workdir, nvram_file1)),
+		fmt.Sprint(path.Join(n.Cfg.LabDir, nvram_file2), ":", path.Join(iol_workdir, nvram_file2)),
 
 		// mount launch config
 		fmt.Sprint(filepath.Join(n.Cfg.LabDir, "startup.cfg"), ":/iol/config.txt"),
@@ -132,9 +137,14 @@ func (n *iol) PostDeploy(ctx context.Context, params *nodes.PostDeployParams) er
 func (n *iol) CreateIOLFiles(ctx context.Context) error {
 	// If NVRAM already exists, don't need to create
 	// otherwise saved configs in NVRAM are overwritten.
-	if !utils.FileExists(path.Join(n.Cfg.LabDir, "nvram")) {
+	if !utils.FileExists(path.Join(n.Cfg.LabDir, nvram_file1)) {
+		// create nvram file
+		utils.CreateFile(path.Join(n.Cfg.LabDir, nvram_file1), "")
+	}
+
+	if !utils.FileExists(path.Join(n.Cfg.LabDir, nvram_file2)) {
 		// create nvram file
-		utils.CreateFile(path.Join(n.Cfg.LabDir, "nvram"), "")
+		utils.CreateFile(path.Join(n.Cfg.LabDir, nvram_file2), "")
 	}
 
 	// create these files so the bind monut doesn't automatically