1 安装mysql
a) brew install mysql
安装完后会提示：
To have launchd start mysql now and restart at login:
brew services start mysql
Or, if you don't want/need a background service you can just run:
mysql.server start
根据需要选择自己要的
这样就安装完了，执行mysql.server start，服务就起来了，可以用
mysql -uroot 进去看看
之前还以为要初始化mysql， 实际上是不用的，那样只是重新在别的地方安装了一个db起来而已
不过密码还是要修改一下
cd /usr/local/opt/mysql/
./bin/mysql_secure_installation
然后按照提示进行修改密码即可
2 安装redis
brew install redis
To have launchd start redis now and restart at login:
brew services start redis
Or, if you don't want/need a background service you can just run:
redis-server /usr/local/etc/redis.conf
redis 配置文件的位置
/usr/local/etc/redis.conf
3 安装zookeeper
brew info zookeeper
brew install zookeeper
安装完毕提示：
To have launchd start zookeeper now and restart at login:
brew services start zookeeper
Or, if you don't want/need a background service you can just run:
zkServer start
配置文件地址：
/usr/local/etc/zookeeper/zoo.cfg
4 安装activemq
brew install activemq
To have launchd start activemq now and restart at login:
brew services start activemq
Or, if you don't want/need a background service you can just run:
activemq start
5 安装nginx
brew info nginx
brew install nginx
装完以后提示：
The default port has been set in /usr/local/etc/nginx/nginx.conf to 8080 so that
nginx can run without sudo.
nginx will load all files in /usr/local/etc/nginx/servers/.
To have launchd start nginx now and restart at login:
brew services start nginx
Or, if you don't want/need a background service you can just run:
nginx
