NAS BACKUP PLUGIN ERROR

##### ISSUE TYPE

* Bug Report

##### COMPONENT NAME

~~~
NAS BACKUP PLUGIN
~~~

##### CLOUDSTACK VERSION

~~~
4.20
~~~

##### CONFIGURATION

##### OS / ENVIRONMENT

Ubuntu 22.04 / NFS

##### SUMMARY

The Jobs failing with error "jobresult":{"errorcode":530,"errortext":"Failed to create VM backup"},"jobinstancetype":"Backup","created":"2024-12-05T13:42:24+0200","completed":"2024-12-05T13:42:24+0200","jobid":"b22226f7-2d2b-43fa-801c-61e5af8a6870"}}

##### STEPS TO REPRODUCE

~~~
Backup plugin has been enabled on the Zone side.
An offering is created.
VM is assigned to backup offering
a Backup is initiated manually from UI.
~~~

##### EXPECTED RESULTS

~~~
Take instance backup
~~~

##### ACTUAL RESULTS

~~~
A directory is created in the /tmp of the hypervisor running the VM
A folder under the VM name is created in the mounted nfs
The UI returns "Failed to create VM backup"
~~~

まず、Ubuntu 22.04/NFS 上で NAS バックアッププラグインを有効にした状態で手動 VM バックアップを再現し、その後、530 エラー前後のプラグイン、ハイパーバイザー、NFS のログを調査します。バックアップが正常に完了し、UI に "Failed to create VM backup" が表示されなくなれば完了です。

索引モデルが issue の本文から書いたものです。