Not sure if I'm doing something wrong here, but this is what I get:

$ sudo yum install osquery
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: <http://cosmos.illinois.edu|cosmos.illinois.edu>
 * extras: <http://mirror.san.fastserv.com|mirror.san.fastserv.com>
 * updates: <http://centos-distro.1gservers.com|centos-distro.1gservers.com>
Package osquery-2.2.1-1.el7.x86_64 already installed and latest version
Nothing to do