How to mount docker container home directory to Azure Storage - azure

Question

I am new to docker. I'm trying to get atmoz/sftp container work with Azure Storage.
My goal is to have multiple SFTP users who will upload files to their own folders which I can then find on Azure Storage.
I used the following command:
az container create \
--resource-group test \
--name testsftpcontainer \
--image atmoz/sftp \
--dns-name-label testsftpcontainer \
--ports 22 \
--location "East US" \
--environment-variables SFTP_USERS="ftpuser1:yyyy:::incoming ftpuser2:xxx:::incoming" \
--azure-file-volume-share-name test-sftp-file-share \
--azure-file-volume-account-name storagetest \
--azure-file-volume-account-key "zzzzzz" \
--azure-file-volume-mount-path /home
The container is created and run but when I unsuccessfully try to connect via Filezilla I get this in log:
Accepted password for ftpuser2 from 10.240.xxx.xxx port 64982 ssh2
bad ownership or modes for chroot directory component "/home/"
If I use /home/ftpuser1/incoming it works for one of the users.
Do I need to change permissions on the /home directory first? If so, how?

Answer 1

Of course, you can mount the Azure File Share to the container directory /home. And it works perfectly on my side:
And I also make a test with the image atmoz/sftp. And it also works fine. The command here:
az container create -g myResourceGroup \
-n azuresftp \
--image atmoz/sftp \
--ports 22 \
--ip-address Public \
-l eastus \
--environment-variables SFTP_USERS="ftpuser1:yyyy:::incoming ftpuser2:xxx:::incoming" \
--azure-file-volume-share-name fileshare \
--azure-file-volume-mount-path /home \
--azure-file-volume-account-name xxxxxx \
--azure-file-volume-account-key xxxxxx
Here is the screenshot:
Update:
With the requirements, the error shows the bad ownership and it's impossible to control the permissions when you mount the Azure file share to the path /home or /home/user right now. So I recommend you mount the Azure file share to the path /home/user/upload of every user and it will go to the same result as you need.

Answer 2

I could not find a solution to the problem. In the end I used another approach:
- I mounted the Azure storage into another unrelated folder /mount/sftpfiles
- After the container was built, I ran these commands:
apt update
apt-get -y install lsyncd
lsyncd -rsync /home /mnt/sftpfiles
They download a tool called lsyncd which watches for file system changes and copies files to another folder when a change occurs.
This solves my requirement but it has a side effect of duplicating all files (that's not a problem for me).
I'm still open to other suggestions that would help me make this cleaner.