On Sat, Dec 31, 2016 at 04:28:04PM -0800, jdow wrote:
>
> ... new 7.2 machine.
> ... SELinux issues.
>

You *must* disable SELinux in CentOS-7.

Here is the two most fun bugs that bit me so far:

a) ZFS will not free disk space when you delete files (maybe fixed in latest ZFS release)
b) NFS will give out random fsid handles, problem shows up when you "yum update systemd" on the server,
   this somehow restarts NFS, then all NFS clients go into "stale file handle" state. (not fixed until el7.4+)

Before el7, if I left SELinux enabled it will always eventually "eat itself" - the computer
will stop working because some file label somewhere will be off. With el7, SELinux seems
to be stable, and if you do not mind defective ZFS and NFS (and what other breakage),
there seem to be no harm in leaving it enabled.


-- 
Konstantin Olchanski
Data Acquisition Systems: The Bytes Must Flow!
Email: olchansk-at-triumf-dot-ca
Snail mail: 4004 Wesbrook Mall, TRIUMF, Vancouver, B.C., V6T 2A3, Canada