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How to mount sub folder in Azure File share in Linux

Manoj Agrawal 20 Reputation points
2024-04-04T14:24:56.0266667+00:00

Hi,

I am not able to mount Sub folders created in Azure file share in my linux machine and hence I can only reach out to the parent file share and place files although I want to be able to place files inside a sub directory created under parent file share in Azure storage.

Please help,

Thanks

Manoj

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  1. Sumarigo-MSFT 46,286 Reputation points Microsoft Employee
    2024-04-05T09:56:51.62+00:00

    @Manoj Agrawal Welcome to Microsoft Q&A Forum, Thank you for posting you query here!

    You cannot mount a sub-folder. You need to mount the entire share. 

    If I cannot mount a sub folder (Azure File share in Linux) then, is it possible to mount the file share and then change directory in Linux machine to traverse to sub folder to place file? So, the answer to this question is. Yes, once you mount the file share, you can change directory to traverse to sub-folder and place file

    Mount fileshare root [has one folder (dir1) and one file (file1)

    azureuser@subm-ubuntu20:~$ sudo mount -t nfs submsapremium.file.core.windows.net:/submsapremium/nfs-share1 /mount/submsapremium/nfs-share1 -o vers=4,minorversio
n=1,sec=sys,nconnect=4
azureuser@subm-ubuntu20:~$ cd /mount/submsapremium/nfs-share1/
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1$ ls
dir1  file1

    I can create a folder, subfolder and file in the mountpoint

    azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1$ cd dir1/
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir1$ ls
dir2  file  file2  file3
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir1$ cd dir2/
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir1/dir2$ ls
file3
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir1/dir2$ mkdir dir3
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir1/dir2$ cd dir3
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir1/dir2/dir3$ touch file4
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir1/dir2/dir3$ ls
file4

     

    I can also mount sub-folder if required and then create files and directories under the mountpoint

     

    Below, I am just mounting the dir2 which is inside the dir1 -> inside root of the share. When I mount the subfolder, I can only see that folder and any child folders/files under the subfolder that is mounted. 

    azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir1/dir2/dir3$ cd
azureuser@subm-ubuntu20:~$ sudo umount /mount/submsapremium/nfs-share1 
azureuser@subm-ubuntu20:~$ ls
azureuser@subm-ubuntu20:~$ sudo mount -t nfs submsapremium.file.core.windows.net:/submsapremium/nfs-share1/dir1/dir2 /mount/submsapremium/nfs-share1 -o vers=4,minorversion=1,sec=sys,nconnect=4
azureuser@subm-ubuntu20:~$ ls
azureuser@subm-ubuntu20:~$ cd /mount/submsapremium/nfs-share1/
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1$ ls
dir3  file3
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1$ touch file5
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1$ ls
dir3  file3  file5
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1$ cd dir3/
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir3$ touch file6
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir3$ ls
file4  file6
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir3$ pwd
/mount/submsapremium/nfs-share1/dir3
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1/dir3$ cd ..
azureuser@subm-ubuntu20:/mount/submsapremium/nfs-share1$ ls
dir3  file3  file5

    For SMB share, you cannot mount the sub-folder, but once you have mounted the root of the file share , you should be able to create subfolders and files under that subfolder

    Here, I am mounting the root of the smb share and also creating folders, sub-folders and files under the mountpoint

    azureuser@subm-ubuntu20:~$ sudo mount -t cifs //submsapremium.file.core.windows.net/smbshare1 /mnt/smbshare1 -o credentials=/etc/smbcredentials/submsapremium.cred,d
ir_mode=0777,file_mode=0777,serverino,nosharesock,actimeo=30
azureuser@subm-ubuntu20:~$ cd /mnt/smbshare1/
azureuser@subm-ubuntu20:/mnt/smbshare1$ ls
subm-vng.zip
azureuser@subm-ubuntu20:/mnt/smbshare1$ mkdir dir1
azureuser@subm-ubuntu20:/mnt/smbshare1$ cd dir1
azureuser@subm-ubuntu20:/mnt/smbshare1/dir1$ touch file1
azureuser@subm-ubuntu20:/mnt/smbshare1/dir1$ mkdir dir2
azureuser@subm-ubuntu20:/mnt/smbshare1/dir1$ touch file2
azureuser@subm-ubuntu20:/mnt/smbshare1/dir1$ ls
dir2  file1  file2
azureuser@subm-ubuntu20:/mnt/smbshare1/dir1$ cd ..
azureuser@subm-ubuntu20:/mnt/smbshare1$ ls
dir1  subm-vng.zip
azureuser@subm-ubuntu20:/mnt/smbshare1$ mkdir dir3
azureuser@subm-ubuntu20:/mnt/smbshare1$ cd dir3
azureuser@subm-ubuntu20:/mnt/smbshare1/dir3$ touch file4
azureuser@subm-ubuntu20:/mnt/smbshare1/dir3$ ls
file4
azureuser@subm-ubuntu20:/mnt/smbshare1/dir3$ pwd
/mnt/smbshare1/dir3
azureuser@subm-ubuntu20:/mnt/smbshare1/dir3$ cd
azureuser@subm-ubuntu20:~$ sudo umount /mnt/smbshare1

    If I directly try to mount a sub-folder, I get the error saying that path does not exist 

    azureuser@subm-ubuntu20:~$ sudo mount -t cifs //submsapremium.file.core.windows.net/smbshare1/dir2 /mnt/smbshare1 -o credentials=/etc/smbcredentials/submsapremium.cred,dir_mode=0777,file_mode=0777,serverino,nosharesock,actimeo=30
mount error(2): No such file or directory
Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) and kernel log messages (dmesg)
azureuser@subm-ubuntu20:~$ sudo mount -t cifs //submsapremium.file.core.windows.net/smbshare1 /mnt/smbshare1 -o credentials=/etc/smbcredentials/submsapremium.cred,dir_mode=0777,file_mode=0777,serverino,nosharesock,actimeo=30
azureuser@subm-ubuntu20:~$ cd /mnt/smbshare1/
azureuser@subm-ubuntu20:/mnt/smbshare1$ ls
dir1  dir3  subm-vng.zip
azureuser@subm-ubuntu20:/mnt/smbshare1$ cd dir3
azureuser@subm-ubuntu20:/mnt/smbshare1/dir3$ ls
file4
azureuser@subm-ubuntu20:/mnt/smbshare1/dir3$ mkdir dir4
azureuser@subm-ubuntu20:/mnt/smbshare1/dir3$ cd dir4
azureuser@subm-ubuntu20:/mnt/smbshare1/dir3/dir4$ touch file6
azureuser@subm-ubuntu20:/mnt/smbshare1/dir3/dir4$

    Please let us know if you have any further queries. I’m happy to assist you further.    

    Please do not forget to "Accept the answer” and “up-vote” wherever the information provided helps you, this can be beneficial to other community members.

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  1. Vinodh247 21,781 Reputation points
    2024-04-04T15:23:40.5333333+00:00

    Hi Manoj Agrawal,

    Thanks for reaching out to Microsoft Q&A.

    I don't think is possible to mount a subfolder. Please see the discussion below with evidence that there is a limitation on mounting subfolder from azure file share into Linux.

    https://stackoverflow.com/a/69265866

    Please 'Upvote'(Thumbs-up) and 'Accept' as an answer if the reply was helpful. This will benefit other community members who face the same issue.

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