Installing MongoDB with MacPorts on OS X

1. Install mongodb with sudo port install mongodb
2. Make a data directory with sudo mkdir -p /opt/local/var/db/mongodb_data
3. Make a logs directory with sudo mkdir -p /opt/local/var/log/mongodb/
4. Make a mongodb directory with sudo mkdir -p /opt/local/etc/mongodb
5. Create configuration file with sudo pico /opt/local/etc/mongodb/mongod.conf

Enter the following if the file is blank and hit ctrl+x and save the file.

# configuration file /opt/local/etc/mongodb/mongod.conf

# Store data alongside MongoDB instead of the default, /data/db/
dbpath = /opt/local/var/db/mongodb_data

# Only accept local connections
bind_ip = 127.0.0.1

# Running as daemon
fork = true

# Take log
logpath = /opt/local/var/log/mongodb/mongodb.log
logappend = true

6. Create startup alias for your terminal profile so that you can run mongostart and mongostop to manually start and stop the mongodb instance.

At the Terminal, enter pico ~/.profile and add the following to the end of the file. When done hit ctrl+x and save the file:

alias mongostart="sudo mongod -f /opt/local/etc/mongodb/mongod.conf --httpinterface"

mongostop_func () {
   local mongopid=`less /opt/local/var/db/mongodb_data/mongod.lock`;
   if [[ $mongopid =~ [[:digit:]] ]]; then
       sudo kill -15 $mongopid;
       echo mongod process $mongopid terminated;
   else
       echo mongo process $mongopid not exist;
   fi
}

alias mongostop="mongostop_func"

7. Start MongoDB by typing mongostart at the Terminal and hitting return (to stop, type mongostop and hit return).
8. Test that MongoDB is running by visiting http://localhost:28017/ in a web browser. You should see a dashboard summarizing the running instance. Note: this is turned off by default, but we've enabled it in our shell profile with the --httpinterface flag in step 5. This should be disabled for production environments.