extend $PATH further
Now that http://tracker.ceph.com/issues/22841 is fixed, extra additions to standard $PATH locations is needed.
Some executables exist in /sbin/ and are not being detected. This doesn't result in failure because ceph-volume is falling back to
using the executable without an absolute path.
Some example of this:
$ which vgcreate /sbin/vgcreate $ which mkfs /sbin/mkfs $ echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin