sync-epel: only run on 1 host

lxsoftbin/sync-epel

@@ -8,6 +8,12 @@
 # c) the tier1 mirror is not in a broken state
 # The script will retry additional tier1 mirrors if it's broken
 
+[[ $EUID -eq 0 ]] && echo "Do not run it as root. Exit!" && exit 1
+MASTER=lxsoftadm01.cern.ch
+[ -f /etc/lxsoft.conf ] && . /etc/lxsoft.conf
+
+[ x`/bin/hostname` != x$MASTER ] && echo "This host (`/bin/hostname`) is not MASTER ($MASTER). Exit." && exit 0
+
 EMAIL=1
 EMAIL_LOG=`mktemp`
 EMAIL_TO="lxsoft-admins@cern.ch"