While experimenting with setting up ltsp on Fedora 18, I came across a strange NFS behaviour which took quite some time to iron out.
I was already exporting /opt as a read only file system; however, with root squashed. LTSP added another export for /opt/ltsp with no_root_squash option.
Everything seemed to be sort of working with a few strange effects, e.g. I could not use passwords and some ltsp scripts were failing.
The problem was that root seemed to be still squashed:
I was already exporting /opt as a read only file system; however, with root squashed. LTSP added another export for /opt/ltsp with no_root_squash option.
/opt *(ro,sync,no_subtree_check) # export for LTSP version 5 /opt/ltsp *(ro,no_root_squash,async,no_subtree_check)
Everything seemed to be sort of working with a few strange effects, e.g. I could not use passwords and some ltsp scripts were failing.
The problem was that root seemed to be still squashed:
A workaround was to use fsid=0 although whatever documentation I came across seemed to suggest that it was no longer needed:[anil@localhost ~]$ sudo mount amd:/opt/ltsp/x86_64 /mnt [anil@localhost ~]$ cd /mnt/home [anil@localhost home]$ ls -l total 8 drwxrwx--- 2 anil anil 4096 Apr 6 13:04 anil drwx------ 2 guest guest 4096 Apr 10 12:35 guest [anil@localhost home]$ sudo su [root@localhost home]# cd anil bash: cd: anil: Permission denied
Unfortunately, I had forgotten that /opt was also being exported and noticed it only after finding the work-around and getting ltsp to work on Fedora 18./opt/ltsp *(ro,fsid=0,no_root_squash,sync,no_subtree_check)
