On Tue, 2018-01-02 at 22:26 -0800, Samuel Sieb wrote:
On 01/02/2018 10:19 PM, Jonathan Ryshpan wrote:
Can someone tell me what this is about? A message in the journal shortly after a boot reads: Failed to start Create Volatile Files and Directories which leads me to the following systemd status query. Jan 02 21:34:31 amito.localdomain systemd-tmpfiles[860]: [/usr/lib/tmpfiles.d/gluster.conf:2] Unknown user 'gluster'.
gluster is a distributed file system. I wouldn't expect it to be installed by default and somehow there's a config file installed without the user being created. What is the output of the following two commands? rpm -qf /usr/lib/tmpfiles.d/gluster.conf rpm -qa | grep gluster

I don't remember installing it. I've checked the installation on another machine on which I recently installed Fedora-27 on bare hardware;
$ rpm -qa | grep gluster
doesn't show anything, so I must have done something to cause the gluster filesystem to be installed.

Is there any reason not to remove it?  

On the other hand, is gluster useful for some particular purpose? For example, can it be configured as a backup system to protect a computer against ransomware, etc?

Here are the results of the commands you asked about:
$ rpm -qf /usr/lib/tmpfiles.d/gluster.conf
glusterfs-3.12.4-1.fc27.x86_64
$ rpm -qa | grep gluster
glusterfs-cli-3.12.4-1.fc27.x86_64
glusterfs-libs-3.12.4-1.fc27.x86_64
qemu-block-gluster-2.10.1-2.fc27.x86_64
glusterfs-api-3.12.4-1.fc27.x86_64
glusterfs-fuse-3.12.4-1.fc27.x86_64
glusterfs-client-xlators-3.12.4-1.fc27.x86_64
glusterfs-3.12.4-1.fc27.x86_64
libvirt-daemon-driver-storage-gluster-3.7.0-3.fc27.x86_64