adduser hadoop
passwd hadoop
chmod u+w /etc/sudoers
vi /etc/sudoers
在
root ALL=(ALL) ALL
下添加
hadoop ALL=(ALL) ALL
chmod u-w /etc/sudoers
service iptables status
service iptables stop
chkconfig iptables --list
chkconfig iptables off
rpm -qa | grep jdk
java-1.7.0-openjdk-1.7.0.51-2.4.5.5.el7.x86_64
java-1.7.0-openjdk-headless-1.7.0.51-2.4.5.5.el7.x86_64
rpm -e --nodeps java-1.7.0-openjdk-1.7.0.51-2.4.5.5.el7.x86_64
rpm -e --nodeps java-1.7.0-openjdk-headless-1.7.0.51-2.4.5.5.el7.x86_64
下载地址: jdk-7u79-linux-x64.tar.gz 下载
使用Filezilla client把jdk-7u79-linux-x64.tar.gz放到CentOS目录/usr/lib/jvm中(史上最简单的上传文件到linux系统方法)
sudo chmod u+x jdk-7u79-linux-x64.tar.gz
cd /usr/lib/jvm
sudo tar -zxvf ./jdk-7u79-linux-x64.tar.gz -C /usr/lib/jvm
sudo gedit /etc/profile
export JAVA_HOME=/usr/lib/jvm/jdk1.7.0_4579
export JRE_HOME=/usr/lib/jvm/jdk1.7.0_4579/jre
export CLASSPATH=.:$JRE_HOME/lib/tr.jar:$JAVA_HOME/lib:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar:$JRE_HOME/lib:$CLASSPATH
export PATH=$JAVA_HOME/bin:$PATH
source /etc/profile
java -version
sudo update-alternatives --install /usr/bin/java java /usr/lib/jvm/jdk1.7.0_79/bin/java 300
sudo update-alternatives --install /usr/bin/javac javac /usr/lib/jvm/jdk1.7.0_79/bin/javac 300
sudo update-alternatives --install /usr/bin/jar jar /usr/lib/jvm/jdk1.7.0_79/bin/jar 300
sudo update-alternatives --config java
ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa
cat ~/.ssh/id_dsa.pub >> ~/.ssh/authorized_keys
ssh -version
ssh localhost
hadoop-2.6.0.tar.gz
sudo tar -zxvf ./hadoop-2.6.0.tar.gz -C /usr/local
cd /usr/local/
sudo mv ./hadoop-2.6.0/ ./hadoop
sudo chown -R hadoop:hadoop ./hadoop
sudo gedit /etc/profile
# set hadoop path
export HADOOP_HOME=/usr/local/hadoop
export PATH=$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin
source /etc/profile
export JAVA_HOME=/usr/lib/jvm/jdk1.7.0_79
<configuration>
<property>
<name>fs.defaultFS</name>
<value>hdfs://localhost:9000</value>
</property>
</configuration>
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
</configuration>
cd /usr/local/hadoop/bin
hdfs namenode -format
cd /usr/local/hadoop/sbin
start-all.sh
成功的话,会看到 successfully formatted 的提示,且倒数第5行的提示如下,Exitting with status 0 表示成功,若为 Exitting with status 1 则是出错。若出错(不该如此,请仔细检查之前步骤),可试着加上 sudo, 既 sudo bin/hdfs namenode -format 再试试看。
stop-all.sh
Jps
ResourceManager
NameNode
DataNode
SecondaryNameNode
NodeManager
WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
原因是hadoop-2.6.0.tar.gz安装包是在32位机器上编译的,64位的机器加载本地库.so文件时出错,不影响使用。
1、重新编译源码后将新的lib/native替换到集群中原来的lib/native
2、修改hadoop-env.sh ,增加
export HADOOP_OPTS="-Djava.library.path=$HADOOP_PREFIX/lib:$HADOOP_PREFIX/lib/native"
原文地址:http://caojingyou.github.io/002.html