Watch for helper pod manifest updates

deploy/local-path-storage.yaml

@@ -104,6 +104,8 @@ spec:
  valueFrom:
  fieldRef:
  fieldPath: metadata.namespace
+ - name: CONFIG_MOUNT_PATH
+ value: "/etc/config/"
  volumes:
  - name: config-volume
  configMap:

main.go

@@ -48,6 +48,7 @@ var (
  DefaultProvisioningRetryCount = pvController.DefaultFailedProvisionThreshold
  FlagDeletionRetryCount = "deletion-retry-count"
  DefaultDeletionRetryCount = pvController.DefaultFailedDeleteThreshold
+ EnvConfigMountPath = "CONFIG_MOUNT_PATH"
 )
 
 func cmdNotFound(c *cli.Context, command string) {

provisioner.go

@@ -169,6 +169,29 @@ func (p *LocalPathProvisioner) refreshConfig() error {
  return err
 }
 
+func (p *LocalPathProvisioner) refreshHelperPod() error {
+ p.configMutex.Lock()
+ defer p.configMutex.Unlock()
+
+ helperPodFile, envExists := os.LookupEnv(EnvConfigMountPath)
+ if !envExists {
+ return nil
+ }
+
+ helperPodFile = filepath.Join(helperPodFile, DefaultHelperPodFile)
+ newHelperPod, err := loadFile(helperPodFile)
+ if err != nil {
+ return err
+ }
+
+ p.helperPod, err = loadHelperPodFile(newHelperPod)
+ if err != nil {
+ return err
+ }
+
+ return nil
+}
+
 func (p *LocalPathProvisioner) watchAndRefreshConfig() {
  go func() {
  ticker := time.NewTicker(ConfigFileCheckInterval)
@@ -179,6 +202,9 @@ func (p *LocalPathProvisioner) watchAndRefreshConfig() {
  if err := p.refreshConfig(); err != nil {
  logrus.Errorf("failed to load the new config file: %v", err)
  }
+ if err := p.refreshHelperPod(); err != nil {
+ logrus.Errorf("failed to load the new helper pod manifest: %v", err)
+ }
  case <-p.ctx.Done():
  logrus.Infof("stop watching config file")
  return

util.go

@@ -3,7 +3,7 @@ package main
 import (
  "encoding/json"
  "fmt"
- "io/ioutil"
+ "io"
  "os"
 
  v1 "k8s.io/api/core/v1"
@@ -16,7 +16,7 @@ func loadFile(filepath string) (string, error) {
  return "", err
  }
  defer f.Close()
- helperPodYaml, err := ioutil.ReadAll(f)
+ helperPodYaml, err := io.ReadAll(f)
  if err != nil {
  return "", err
  }