1.yum install -y java-1.8.0-openjdk-devel openssh-clients openssh-server
    2.systemctl enable sshd && systemctl start sshd
    3.下载hadoop https://hadoop.apache.org/releases.html 3.1.4
    4.docker cp ‘E:[hadoop-3.1.4.tar.gz](https://mirrors.bfsu.edu.cn/apache/hadoop/common/hadoop-3.1.4/hadoop-3.1.4.tar.gz)’ hadoop_single:/root/ 路径（E:[hadoop-3.1.4.tar.gz](https://mirrors.bfsu.edu.cn/apache/hadoop/common/hadoop-3.1.4/hadoop-3.1.4.tar.gz)） 容器名称（hadoop_single）
    5.dokcer exec -it hadoop_single bash
    6.cd /root
    7.tar -zxf hadoop-3.1.4.tar.gz
    8.mv hadoop-3.1.4 /usr/local/hadoop
    9.配置环境变量 /etc/bashrc 中 添加
    HADOOP_HOME=/usr/local/hadoop
    PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin
    /usr/local/hadoop/etc/hadoop/hadoop-env.sh 中添加
    HADOOP_HOME=/usr/local/hadoop
    JAVA_HOME=/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.275.b01-1.el8_3.x86_64 （centos中安装的java版本）
    10.hadoop version 查看hadoop 版本