I have a NFS (Amazon EFS) share mounted on Ubuntu 20.04 LXD server using the following /etc/fstab entry on the host:
10.0.0.210:/ /storage nfs4 nfsvers=4.1,rsize=1048576,wsize=1048576,hard,timeo=600,retrans=2,noresvport 0 0
I’ve verified on the host that I’m able to create files and directories as root, and chown them to other users.
Now, I’ve created a /storage/containers directory inside the NFS mount, and added it to the container as a device using:
lxc config device add testcontainer storage disk source=/storage/containers path=/storage
I’ve also made “chown 1000000:1000000 /storage/containers” to make sure the UIDs are matching the container.
With this in place, I’m able to add files and directories in the container, as root. However, trying to use chown in the container renders an error:
# touch testfile # chown www-data:www-data testfile chown: changing ownership of 'testfile': Operation not permitted
Why is this happening? If I add a normal, non-NFS directory as a container device, I’m able to use chown in the container. Also, I’m able to use chown on host.
Any help appreciated!