Adds own host to a mongo replica-set. Runs on server-startup

addHostToMongoReplicaset.sh

#!/usr/bin/env bash

#get own hostname
ME=$(hostname);

# find replica-set master, we think its the first in the array 
MASTER=`mongo --quiet --eval "cfg=rs.config(); print( cfg.members[0].host );"`
# connect to master, add ME
mongo --host $MASTER --eval "print( rs.add('"$ME"') );"

# make ME queryable 
mongo --eval "rs.slaveOk();"