ubuntu配置hadoop，HDFS和YARN（单机）

配置jdk环境

sudo apt-get update
sudo apt-get install openjdk-8-jdk

出现以下内容代表安装成功，安装目录为/usr/bin/java：

部署HDFS集群

下载hadoop，用清华镜像下载很快，新建个目录输入以下命令

wget https://mirrors.tuna.tsinghua.edu.cn/apache/hadoop/common/hadoop-3.4.0/hadoop-3.4.0.tar.gz

解压安装包

创建软连接hadoop后cd进去，进入hadoop/etc/hadoop下，修改文件配置

配置workers

vim workers后，里面默认只有一个localhost，可以按照需求填写节点主机的ip，这里不做修改。

配置hadoop-env.sh

首先找到JAVA_HOME

sudo update-alternatives --config java

vim打开hadoop-env.sh后添加以下内容，这里JAVA_HOME注意别填错了

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export HADOOP_HOME=/export/server/hadoop
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop
export HADOOP_LOG_DIR=$HADOOP_HOME/logs

配置core-site.xml

添加以下内容

<configuration>
  <property>
    <name>fs.defaultFS</name>
    <value>hdfs://localhost:8020</value>
  </property>
    <property>
    <name>io.file.buffer.size</name>
    <value>131072</value>
  </property>
</configuration>

配置hdfs-site.xml

<configuration>
  <property>
    <name>dfs.datanode.data.dir.perm</name>
  <value>700</value>
  </property>
  <property>
    <name>dfs.namenode.name.dir</name>
  <value>/data/nn</value>
  </property>
  <property>
    <name>dfs.namenode.hosts</name>
  <value>localhost</value>
  </property>
  <property>
    <name>dfs.blocksize</name>
  <value>268435456</value>
  </property>
  <property>
    <name>dfs.namenode.handler.count</name>
  <value>100</value>
  </property>
  <property>
   <name>dfs.datanode.data.dir</name>
  <value>/data/dn</value>
  </property>
</configuration>

记得创建这两个文件夹

此外可以根据需求把hadoop操作权限授权给非root用户。

现在配置完了，接着初始化文件系统

初始化文件系统

 hadoop namenode -format

配置免密登录

ssh-keygen -t rsa -b 4096

输入后疯狂按回车，再输入

ssh-copy-id localhost

至此配置完成。

执行start-dfs.sh可以打开9870端口进入webui就代表成功了。

部署YARN集群

配置mapred-env.sh（$HADOOP_HOME/etc/hadoop下

添加以下内容

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export HADOOP_JOB_HISTORYSERVER_HEAPSIZE=1000
export HADOOP_MAPRED_ROOT_LOGGER=info,RFA

配置mapred-site.xml

添加以下内容

<configuration>
  <property>
    <name>mapreduce.framework.name</name>
    <value>yarn</value>
    <description></description>
  </property>

  <property>
    <name>mapreduce.jobhistory.address</name>
    <value>localhost:10020</value>
    <description></description>
  </property>

  <property>
    <name>mapreduce.jobhistory.webapp.address</name>
    <value>localhost:19888</value>
    <description></description>
  </property>

  <property>
    <name>mapreduce.jobhistory.intermediate-done-dir</name>
    <value>/data/mr-history/tmp</value>
    <description></description>
  </property>

  <property>
    <name>mapreduce.jobhistory.done-dir</name>
    <value>/data/mr-history/done</value>
    <description></description>
  </property>
<property>
  <name>yarn.app.mapreduce.am.env</name>
  <value>HADOOP_MAPRED_HOME=$HADOOP_HOME</value>
</property>
<property>
  <name>mapreduce.map.env</name>
  <value>HADOOP_MAPRED_HOME=$HADOOP_HOME</value>
</property>
<property>
  <name>mapreduce.reduce.env</name>
  <value>HADOOP_MAPRED_HOME=$HADOOP_HOME</value>
</property>
</configuration>

配置yarn-env.sh

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export HADOOP_HOME=/export/server/hadoop
export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop
export HADOOP_LOG_DIR=$HADOOP_HOME/logs

配置yarn-site.xml

<configuration>

<!-- Site specific YARN configuration properties -->
<property>
    <name>yarn.log.server.url</name>
    <value>http://localhost:19888/jobhistory/logs</value>
    <description></description>
</property>

  <property>
    <name>yarn.web-proxy.address</name>
    <value>localhost:8089</value>
    <description>proxy server hostname and port</description>
  </property>

  <property>
    <name>yarn.log-aggregation-enable</name>
    <value>true</value>
    <description>Configuration to enable or disable log aggregation</description>
  </property>

  <property>
    <name>yarn.nodemanager.remote-app-log-dir</name>
    <value>/tmp/logs</value>
    <description>Configuration to enable or disable log aggregation</description>
  </property>

<!-- Site specific YARN configuration properties -->
  <property>
    <name>yarn.resourcemanager.hostname</name>
    <value>localhost</value>
    <description></description>
  </property>

  <property>
    <name>yarn.resourcemanager.scheduler.class</name>
    <value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler</value>
    <description></description>
  </property>

  <property>
    <name>yarn.nodemanager.local-dirs</name>
    <value>/data/nm-local</value>
    <description>Comma-separated list of paths on the local filesystem where intermediate data is written.</description>
  </property>

  <property>
    <name>yarn.nodemanager.log-dirs</name>
    <value>/data/nm-log</value>
    <description>Comma-separated list of paths on the local filesystem where logs are written.</description>
  </property>

  <property>
    <name>yarn.nodemanager.log.retain-seconds</name>
    <value>10800</value>
    <description>Default time (in seconds) to retain log files on the NodeManager Only applicable if log-aggregation is disabled.</description>
  </property>

  <property>
    <name>yarn.nodemanager.aux-services</name>
    <value>mapreduce_shuffle</value>
    <description>Shuffle service that needs to be set for Map Reduce applications.</description>
  </property>
</configuration>

启动命令：

start-dfs.sh
start-yarn.sh

启动历史服务器：

 mapred --daemon start historyserver

输入jps显示以下进程

至此配置完毕。