A gluster trusted pool (aka cluster), consists of several key components; nodes, volumes and bricks. In glusterfs 3.4/3.5, there isn't a single command that can provide an overview of the cluster's health. This means that admins currently assess the cluster health by looking at several commands to piece together a picture of the cluster's state.
This is a companion discussion topic for the original entry at https://copr.fedorainfracloud.org/coprs/sac/gstatus/