Hadoop-2.6.0 集群的 安装与配置

1.  配置节点bonnie1 hadoop环境

　(1) 下载hadoop- 2.6.0 并解压缩

[root@bonnie1 ~]# wget http://apache.fayea.com/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz -C /usr/local

[root@bonnie1 ~]# cd /usr/local/

[root@bonnie1 local]# tar -xvf hadoop-2.6.0.tar

　 　　(2) 配置环境变量

[root@bonnie1 local]# vi /etc/profile

export JAVA_HOME=/usr/local/jdk1.7.0_79

export HADOOP_HOME=/usr/local/hadoop-2.6.0

export HADOOP_COMMON_HOME=$HADOOP_HOME

export HADOOP_HDFS_HOME=$HADOOP_HOME

export HADOOP_MAPRED_HOME=$HADOOP_HOME

export HADOOP_YARN_HOME=$HADOOP_HOME

export HADOOP_CONF_DIR=$HADOOP_HOME/etc/hadoop

export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native

export HADOOP_OPTS="-Djava.library.path=$HADOOP_HOME/lib"

export ZOOKEEPER_HOME=/usr/local/zookeeper-3.4.6

export PATH=$JAVA_HOME/bin:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:$ZOOKEEPER_HOME/bin:$ZOOKEEPER_HOME/conf:$PATH

export CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar

[root@bonnie1 local]# cd hadoop-2.6.0/etc/hadoop/

[root@bonnie1 hadoop]# vi hadoop-env.sh

＃ 追加如下字段

export JAVA_HOME=/usr/local/jdk1.7.0_79

export HADOOP_PREFIX=/usr/local/hadoop-2.6.0

[root@bonnie1 hadoop]# vi core-site.xml

<configuration>

<property>

<name>fs.defaultFS</name>

<value>hdfs://ns1</value>

</property>

<property>

<name>hadoop.tmp.dir</name>

<value>/usr/local/hadoop-2.6.0/tmp</value>

</property>

<property>

<name>ha.zookeeper.quorum</name>

<value>bonnie1:2181,bonnie2:2181,bonnie3:2181</value>

</property>

</configuration>

[root@bonnie1 hadoop]# vi hdfs-site.xml

<configuration>

<property>

<name>dfs.nameservices</name>

<value>ns1</value>

</property>

<property>

<name>dfs.ha.namenodes.ns1</name>

<value>nn1,nn2</value>

</property>

<property>

<name>dfs.namenode.rpc-address.ns1.nn1</name>

<value>bonnie1:9000</value>

</property>

<property>

<name>dfs.namenode.http-address.ns1.nn1</name>

<value>bonnie1:50070</value>

</property>

<property>

<name>dfs.namenode.rpc-address.ns1.nn2</name>

<value>bonnie2:9000</value>

</property>

<property>

<name>dfs.namenode.http-address.ns1.nn2</name>

<value>bonnie2:50070</value>

</property>

<property>

<name>dfs.namenode.shared.edits.dir</name>

<value>qjournal://bonnie1:8485;bonnie2:8485;bonnie3:8485/ns1</value>

</property>

<property>

<name>dfs.journalnode.edits.dir</name>

<value>/usr/local/hadoop-2.6.0/journal</value>

</property>

<property>

<name>dfs.ha.automatic-failover.enabled</name>

<value>true</value>

</property>

<property>

<name>dfs.client.failover.proxy.provider.ns1</name>

<value>org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider</value>

</property>

<property>

<name>dfs.ha.fencing.methods</name>

<value>

sshfence

shell(/bin/true)

</value>

</property>

<property>

<name>dfs.ha.fencing.ssh.private-key-files</name>

<value>/root/.ssh/id_rsa</value>

</property>

<property>

<name>dfs.ha.fencing.ssh.connect-timeout</name>

<value>30000</value>

</property>

</configuration>

[root@bonnie1 hadoop]# vi mapred-site.xml

<configuration>

<property>

<name>mapreduce.framework.name</name>

<value>yarn</value>

</property>

</configuration>

[root@bonnie1 hadoop]# vi yarn-site.xml 

<configuration>

<property>

<name>yarn.resourcemanager.hostname</name>

<value>bonnie3</value>

</property>

<property>

<name>yarn.nodemanager.aux-services</name>

<value>mapreduce_shuffle</value>

</property>

</configuration>

[root@bonnie1 hadoop]# vi slaves

bonnie1

bonnie2

bonnie3

2. 将配置好的hadoop文件拷贝到其他几个节点

[root@bonnie1 hadoop]# cd /usr/local

[root@bonnie1 local]# scp -r hadoop-2.6.0 bonnie2:/usr/local/

3. 集群初始化

(1) ＃启动 zookeeper ，zookeeper 安装见上一篇  zookeeper 安装与配置

[root@bonnie1 hadoop]# cd /usr/local/zookeeper-3.4.6/bin/

[root@bonnie1 bin]# ./zkServer.sh start

[root@bonnie2 hadoop]# cd /usr/local/zookeeper-3.4.6/bin/

[root@bonnie2 bin]# ./zkServer.sh start

[root@bonnie3 hadoop]# cd /usr/local/zookeeper-3.4.6/bin/

[root@bonnie3 bin]# ./zkServer.sh start

＃ 查看 zookeeper 状态

[root@bonnie1 bin]# ./zkServer.sh status

[root@bonnie2 bin]# ./zkServer.sh status 

[root@bonnie3 bin]# ./zkServer.sh status

一个leader，两个follower

(2) 启动journalnode

* 分别在bonnie1、bonnie2、bonnie3上执行启动命令

[root@bonnie1 ~]# cd /usr/local/hadoop-2.6.0/sbin

[root@bonnie1 sbin]# ./hadoop-daemon.sh start journalnode

[root@bonnie2 sbin]# ./hadoop-daemon.sh start journalnode

[root@bonnie3 sbin]# ./hadoop-daemon.sh start journalnode

* 运行jps命令检验是否存在启动进程JournalNode

[root@bonnie1 sbin]# jps

5335 JournalNode

7303 Jps

3124 QuorumPeerMain

(3) 格式化HDFS

* 在节点bonnie1上执行格式化命令

[root@bonnie3 sbin]＃ hdfs namenode -format

＃ 出现如下日志表示成功

16/12/04 14:19:38 INFO common.Storage: Storage directory /usr/local/hadoop-2.6.0/tmp/dfs/name has been successfully formatted.

HA两节点保持同步，将invin01上的tmp目录拷贝到invin02节点

格式化后会在根据core-site.xml中的hadoop.tmp.dir配置生成个文件，这里我配置的是/usr/local/hadoop-2.6.0/tmp，然后将/usr/local/hadoop-2.6.0/tmp拷贝到bonnie2的/usr/local/hadoop-2.6.0/下

[root@bonnie1 hadoop-2.6.0]# scp -r tmp/ bonnie2:/usr/local/hadoop-2.6.0/

(4) 格式化ZK

[root@bonnie1 hadoop-2.6.0]# hdfs zkfc -formatZK

# 出现如下日志表示成功

16/12/04 14:20:48 INFO ha.ActiveStandbyElector: Successfully created /hadoop-ha/ns1 in ZK.

 

4. 启动集群

(1) jps （kill －9 ［进程号］）关闭（除QuorumPeerMain）所有进程

(2) 启动HDFS(在bonnie1上执行)

sbin/start-dfs.sh

(3) 启动YARN(在bonnie3上执行)

sbin/start-yarn.sh

5. hadoop-2.6.0集群配置完毕，通过浏览器访问验证

http://10.211.55.21:50070

NameNode 'bonnie1:9000' (active)

http://10.211.55.22:50070

NameNode 'bonnie2:9000' (standby)

http://10.211.55.23:8088

　　6. HDFS测试－上传下载文件

hadoop fs -mkdir /tmp/input              　　 　　　　＃在HDFS上新建文件夹

hadoop fs -put input1.txt /tmp/input  　　　　 　　　　＃把本地文件input1.txt传到HDFS的/tmp/input目录

hadoop fs -get  input1.txt /tmp/input/input1.txt 　　＃把HDFS文件拉到本地

hadoop fs -ls /tmp/output                  　　　　　 ＃列出HDFS的某目录

hadoop fs -cat /tmp/ouput/output1.txt  　　　　　　　　＃查看HDFS上的文件

hadoop fs -rm -r /home/less/hadoop/tmp/output 　　　　＃删除HDFS上的目录

 

# 查看HDFS状态，比如有哪些datanode，每个datanode的情况

hadoop dfsadmin -report 

 

hadoop dfsadmin -safemode leave  # 离开安全模式

hadoop dfsadmin -safemode enter  # 进入安全模式

　　7. YARN测试－WordCount

vi test.csv

hello tomcat

help yumily

cat bonnie

上传测试数据文件

hadoop fs -put test.csv /

运行wordcount

cd hadoop-2.6.0/share/hadoop/mapreduce/

hadoop jar hadoop-mapreduce-examples-2.6.0.jar wordcount /test.csv /out

8. Hadoop启动与关闭流程

(1) 启动流程

分别在bonnie1,bonnie2,bonnie3上执行启动命令

[root@bonnie1 ~]# cd /usr/local/zookeeper-3.4.6/bin/

[root@bonnie1 bin]# ./zkServer.sh start

(2) 查看各ZK节点状态

[root@bonnie1 bin]# ./zkServer.sh status

一个leader，两个follower

(3) 启动HDFS(在invin01上执行)

[root@bonnie1 hadoop-2.6.0]# sbin/start-dfs.sh

(4) 启动YARN

[root@bonnie1 hadoop-2.6.0]# sbin/start-yarn.sh

9 关闭流程

　　(1)关闭HDFS(在invin01上执行)

[root@bonnie1 hadoop-2.6.0]#sbin/stop-dfs.sh

(2)关闭YARN(在invin03上执行)

[root@bonnie1 hadoop-2.6.0]# sbin/stop-yarn.sh

(3)关闭ZK(在invin04，invin05，invin06上执行)

[root@bonnie1 hadoop-2.6.0]# cd /home/hduser/zookeeper-3.4.6/bin/

[root@bonnie1 bin]# ./zkServer.sh stop