Start rngd before format the disk

(cherry picked from commit d7f47925a1)

cmd/control/bootstrap.go

@@ -23,6 +23,13 @@ func BootstrapMain() {
 	log.Debugf("bootstrapAction: loadingConfig")
 	cfg := config.LoadConfig()
 
+	log.Debugf("bootstrapAction: Rngd(%v)", cfg.Rancher.State.Rngd)
+	if cfg.Rancher.State.Rngd {
+		if err := runRngd(); err != nil {
+			log.Errorf("Failed to run rngd: %v", err)
+		}
+	}
+
 	log.Debugf("bootstrapAction: MdadmScan(%v)", cfg.Rancher.State.MdadmScan)
 	if cfg.Rancher.State.MdadmScan {
 		if err := mdadmScan(); err != nil {
@@ -68,6 +75,13 @@ func mdadmScan() error {
 	return cmd.Run()
 }
 
+func runRngd() error {
+	cmd := exec.Command("rngd", "-q")
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	return cmd.Run()
+}
+
 func runStateScript(script string) error {
 	f, err := ioutil.TempFile("", "")
 	if err != nil {

config/schema.go

@@ -169,6 +169,7 @@ var schema = `{
         "required": {"type": "boolean"},
         "autoformat": {"$ref": "#/definitions/list_of_strings"},
         "mdadm_scan": {"type": "boolean"},
+        "rngd": {"type": "boolean"},
         "script": {"type": "string"},
         "oem_fstype": {"type": "string"},
         "oem_dev": {"type": "string"}

config/types.go

@@ -200,6 +200,7 @@ type StateConfig struct {
 	Required   bool     `yaml:"required,omitempty"`
 	Autoformat []string `yaml:"autoformat,omitempty"`
 	MdadmScan  bool     `yaml:"mdadm_scan,omitempty"`
+	Rngd       bool     `yaml:"rngd,omitempty"`
 	Script     string   `yaml:"script,omitempty"`
 	OemFsType  string   `yaml:"oem_fstype,omitempty"`
 	OemDev     string   `yaml:"oem_dev,omitempty"`

os-config.tpl.yml

@@ -82,6 +82,7 @@ rancher:
     fstype: auto
     oem_fstype: auto
     oem_dev: LABEL=RANCHER_OEM
+    rngd: true
   sysctl:
     fs.file-max: 1000000000
   services: