系统偏好设置 -> 共享 -> 远程登录

# 生成秘钥（如果没有）
ssh-keygen -t rsa -P ''
# 授权免密登录
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
# 免密登录
ssh lcoalhost

brew install hadoop

# 查看hadoop路径
brew info hadoop
# 查看java路径
which java

export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true -Djava.security.krb5.realm= -Djava.security.krb5.kdc="
export JAVA_HOME="/Library/Java/JavaVirtualMachines/jdk1.8.0_172.jdk/Contents/Home"

<configuration>
  <property>
     <name>hadoop.tmp.dir</name>
<value>/usr/local/Cellar/hadoop/hdfs/tmp</value>
  </property>
  <property>
     <name>fs.default.name</name>
     <value>hdfs://localhost:8020</value>
  </property>
</configuration>

<configuration>
      <property>
        <name>mapred.job.tracker</name>
        <value>localhost:8021</value>
      </property>
</configuration>

<configuration>
   <property>
     <name>dfs.replication</name>
     <value>1</value>
    </property>
    <property>
       <name>dfs.name.dir</name>
       <value>/usr/local/Cellar/hadoop/hdfs/name</value>
    </property>
    <property>
       <name>dfs.data.dir</name>
       <value>/usr/local/Cellar/hadoop/hdfs/data</value>
    </property>
    <property>
      <name>dfs.http.address</name>
      <value>localhost:50070</value>
    </property>
</configuration>

export HADOOP_HOME=/usr/local/Cellar/hadoop/3.1.1
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export PATH=$PATH:$HADOOP_HOME/sbin:$HADOOP_HOME/bin

source ~/.bash_profile

hdfs namenode -format

start-dfs.sh  
stop-dfs.sh
start-yarn.sh
stop-yarn.sh

hdfs dfs -ls  /