We have done most of the wiring in the log house by drilling vertical conduit holes in the logs as they were stacked. However over door ways you cannot avoid the “recommended” short cut of taking the power cable up the back of the steel that stiffens the log assembly, across the door head and then out to the external
face of the log with a diagonally drilled hole to wait for the light fitting to arrive. Have a look in the Log House Design category for more details of door and window openings if this is of interest.