安装单机模式Hadoop-2.6.3(1)
jdk下载地址
http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html
添加hadoop用户
# useradd hadoop
# passwd hadoop
# ssh-keygen #生成密钥
# ssh-copy-id -i ~/.ssh/id_rsa.pub hadoop@127.0.0.1
将主机名写入hosts文件中
# echo "127.0.0.1 `hostname`" >> /etc/hosts
下载jdk-8u71-linux-x64.tar.gz
# tar xf jdk-8u71-linux-x64.tar.gz -C /usr/local/
# cd /usr/local/
# mv jdk1.8.0_71 java
# vim /etc/profile.d/java.sh
#!/bin/bash
export JAVA_HOME=/usr/local/java #这里是你对应的jdk目录
export CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib:$JAVA_HOME/jre/lib
export PATH=$PATH:$JAVA_HOME/bin:$JAVA_HOME/jre/bin
# bash /etc/profile.d/java.sh
测试jdk是否安装成功
# java -version
java version "1.8.0_71"
Java(TM) SE Runtime Environment (build 1.8.0_71-b15)
Java HotSpot(TM) 64-Bit Server VM (build 25.71-b15, mixed mode)
hadoop下载地址
http://www.apache.org/dyn/closer.cgi/hadoop/common/hadoop-2.6.3/hadoop-2.6.3.tar.gz
下载hadoop-2.6.3.tar.gz
# tar xf hadoop-2.6.3.tar.gz -C /usr/local/
# cd /usr/local/
# mv hadoop-2.6.3 hadoop
# vim /etc/profile.d/hadoop.sh
#!/bin/bash
export HADOOP_HOME=/usr/local/hadoop
export PATH=$PATH:$HADOOP_HOME/bin
# bash /etc/profile.d/hadoop.sh
测试hadoop是否安装成功
# hadoop version
Hadoop 2.6.3
Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git -r cc865b490b9a6260e9611a5b8633cab885b3d247
Compiled by jenkins on 2015-12-18T01:19Z
Compiled with protoc 2.5.0
From source with checksum 722f77f825e326e13a86ff62b34ada
This command was run using /usr/local/hadoop/share/hadoop/common/hadoop-common-2.6.3.jar
下面开始正式的配置hadoop
涉及到的文件有:
/usr/local/hadoop/etc/hadoop/
hadoop-env.sh
yarn-env.sh
yarn-site.xml
core-site.xml
hdfs-site.xml
mapred-site.xml
修改hadoop-env.sh配置文件
# cd /usr/local/hadoop/etc/hadoop
# vim hadoop-env.sh
#添加以下内容
export JAVA_HOME=/usr/local/java
export HADOOP_PREFIX=/usr/local/hadoop
修改yarn-env.sh配置文件,将以下内容替换
# sed -i 's@^JAVA_HOME=$JAVA_HOME@JAVA_HOME=/usr/local/java@' yarn-env.sh
修改core-site.xml配置文件，配置hdfs的访问地址和端口
# vim core-site.xml
fs.default.name
hdfs://centos67:9000
hdfs的访问地址
hadoop.tmp.dir
/home/hadoop/tmp/
hdfs的临时目录
修改hdfs-site.xml配置文件，备份方式默认为3，我的是单机模式，所以改为1了
# mkdir -p /home/hadoop/hdfs/{name,data}
# chown -R hadoop:hadoop /home/hadoop/hdfs
# vim hdfs-site.xml
dfs.name.dir
file:/home/hadoop/hdfs/name
dfs.data.dir
file:/home/hadoop/hdfs/data
dfs.replication
1
修改hadoop配置文件MapReduce的配置文件mapred-site.xml，
# vim mapred-site.xml
mapreduce.framework.name
yarn
修改hadoop配置文件yarn-site.xml
# vim yarn-site.xml
yarn.nodemanager.aux-services
mapreduce_shuffle
yarn.resourcemanager.webapp.address
${yarn.resourcemanager.hostname}:8099
至此，hadoop可以格式化并启动了。
# hadoop namenode -format
# /usr/local/hadoop/sbin/start-dfs.sh
# jps
1472 DataNode
1660 SecondaryNameNode
2159 Jps
1375 NameNode
有这么几个进程，说明已经成功启动了
# /usr/local/hadoop/sbin/start-yarn.sh
1472 DataNode
2294 NodeManager
2392 Jps
1660 SecondaryNameNode
2205 ResourceManager
1375 NameNode
查看是否有9000端口
# netstat -lnpt | grep 9000
网页访问
http://localhost:50070
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