PREIN

/bin/sh

/usr/share/rpm-helper/add-group mongodb $1 mongod  
/usr/share/rpm-helper/add-user mongodb $1 mongod /var/lib/mongo /bin/false

PREUN

/bin/sh

/usr/share/rpm-helper/del-service mongodb $1 mongod

POSTIN

/bin/sh

/usr/share/rpm-helper/add-service mongodb $1 mongod