Cannot mount glusterfs client ubuntu

So I am totally new to whole GlusterFS world, have been researching it because I need a shared drive between EC2 instances. I have 2 ubuntu webservers which connect to third instance which only hosts MySQL. I want shared drive between 2 webservers so I set up 2 more Ubuntu servers to create GlusterFS replication type set up. I went through the doc that showed how to set it up.

I then went to webservers and installed glusterfs-client, added entry in fstab but I do see anything when I use df -h command. So I tried manually mounting the drive and it said mount was unsuccessful and to look into the log files. This is what I see in the log files. I have no idea on how to resolve this. Search results for similar error point to Red Hat issues but none for Ubuntu. Any ideas on how to proceed with this?

So I resolved this issue thanks to the freenode channel. I had a version issue, removed the client added sudo add-apt-repository ppa:gluster/glusterfs-3.8 on client to match server version.