Hi,
We are facing an issue with root squash in our Lustre file system. It
used to work perfectly, but recently, it stopped taking effect. I've
been trying to have root access on our MDS server to access the Lustre
file system, but none of the configurations I've tried seem to work
anymore.
Here are the settings I've tried so far:
(1) mdt.myfs01-MDT0000.root_squash=0:0
(2) mdt.myfs01-MDT0000.nosquash_nids=20.42.34.79@tcp
mdt.myfs01-MDT0000.root_squash=99:99
(3) mdt.myfs01-MDT0000.root_squash=0:0
mdt.myfs01-MDT0000.nosquash_nids=20.42.34.79@tcp
Despite all these attempts, I still face a 'Permission denied' error
when trying to create a regular file in lustre using root account.
Here is an example:
[root@myfsmds01 /]# mount -t lustre 20.42.34.79@tcp:/myfs01 /mnt/
[root@myfsmds01 /]# lctl get_param mdt.*.*squa*
mdt.myfs01-MDT0000.nosquash_nids=20.42.34.79@tcp
mdt.myfs01-MDT0000.root_squash=0:0
[root@myfsmds01 /]# cd /mnt
[root@myfsmds01 mnt]# mv /tmp/aaa /tmp/test.dat
[root@myfsmds01 mnt]# cp /tmp/test.dat ./test18
cp: cannot create regular file './test18': Permission denied
[root@myfsmds01 mnt]# sestatus
SELinux status: disabled
This issue started recently, and I haven't made any significant changes
to the system. Are there any known problems with root squash that I
might have missed?
Thanks in advance,
Jane
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