Remove mount cache for cephfs

[Madhu-1]

PR #282 introduces the mount cache to solve cephfs fuse mount issue when cephfs plugin pod
restarts. This is not working as intended. This PR removes the code for maintainability.

Signed-off-by: Madhu Rajanna madhupr007@gmail.com

Related issues

Mention any github issues relevant to this PR. Adding below line
will help to auto close the issue once the PR is merged.

Updates #824

[ShyamsundarR]

As the commit has "Fixes" keyword for the issue, it will close it automatically, we may want to track the issue to remove the deprecated option in the next release. I would suggest "Updates" as the keyword referencing the issue hence.

[humblec]

As the commit has "Fixes" keyword for the issue, it will close it automatically, we may want to track the issue to remove the deprecated option in the next release. I would suggest "Updates" as the keyword referencing the issue hence.

@Madhu-1 can you address this ? rest looks good to me. Thanks !

[Madhu-1]

@humblec done

[jianglingxia]

can somebody see the issue #836
that v1.2.0 csi version used the cephfs and the mount-cache-dir function why only remounted one volume when csiplugin existed? but in the minion has many mountpath,thanks all!

[jianglingxia]

@Madhu-1
can you help me ? now i found that when plugin restart the remountCachedVolumes function only remount one volume,cause the monion mount path transport endpoint is not connected

the code bug that follow
func (nc *NodeCache) ForAll(pattern string, destObj interface{}, f ForAllFunc) error {
err := nc.EnsureCacheDirectory(nc.CacheDir)
if err != nil {
return errors.Wrap(err, "node-cache: couldn't ensure cache directory exists")
}
files, err := ioutil.ReadDir(path.Join(nc.BasePath, nc.CacheDir))
if err != nil {
return errors.Wrapf(err, "node-cache: failed to read %s folder", nc.BasePath)
}
cachePath := path.Join(nc.BasePath, nc.CacheDir)
for _, file := range files {
err = decodeObj(cachePath, pattern, file, destObj)
if err == errDec {
continue
} else if err == nil {
if err = f(strings.TrimSuffix(file.Name(), filepath.Ext(file.Name()))); err != nil {
return err
}
}
return err ----?this line?

}
return nil

}