海神

用homebrew装完mongodb之后就会有一个提示，或者打命令：brew info mongo也可以显示：

mongodb 2.0.2-x86_64
http://www.mongodb.org/
/usr/local/Cellar/mongodb/2.0.2-x86_64 (18 files, 121M)
 
If this is your first install, automatically load on login with:
mkdir -p ~/Library/LaunchAgents
cp /usr/local/Cellar/mongodb/2.0.2-x86_64/homebrew.mxcl.mongodb.plist ~/Library/LaunchAgents/
launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist
 
If this is an upgrade and you already have the homebrew.mxcl.mongodb.plist loaded:
launchctl unload -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist
cp /usr/local/Cellar/mongodb/2.0.2-x86_64/homebrew.mxcl.mongodb.plist ~/Library/LaunchAgents/
launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist
 
Or start it manually:
mongod run --config /usr/local/Cellar/mongodb/2.0.2-x86_64/mongod.conf
 
The launchctl plist above expects the config file to be at /usr/local/etc/mongod.conf.
If this is a first install, you can copy one from /usr/local/Cellar/mongodb/2.0.2-x86_64/mongod.conf:
cp /usr/local/Cellar/mongodb/2.0.2-x86_64/mongod.conf /usr/local/etc/mongod.conf
 
http://github.com/mxcl/homebrew/commits/master/Library/Formula/mongodb.rb

  所以加入自动启动的方法就是：

mkdir -p ~/Library/LaunchAgents
cp /usr/local/Cellar/mongodb/2.0.2-x86_64/homebrew.mxcl.mongodb.plist ~/Library/LaunchAgents/
cp /usr/local/Cellar/mongodb/2.0.2-x86_64/mongod.conf /usr/local/etc/mongod.conf
launchctl load -w ~/Library/LaunchAgents/homebrew.mxcl.mongodb.plist

因为homebrew.mxcl.mongodb.plist里面把mongod文件的位置设为了/usr/local/bin/mongod，所以要确保你的这个文件确实存在。

安装完之间可以检查mongod进程是否已经存在，还可以访问http://localhost:28017来检查mongod的状态。

启动和停止mongod服务的方法是：

launchctl start homebrew.mxcl.mongodb
launchctl stop homebrew.mxcl.mongodb

通过网页方式访问服务器的时候可能会出一个提示：REST is not enabled，解决方法是在/usr/local/etc/mongod.conf中加入：rest = true。