Hadoop2.6.5高可用集群搭建
软件环境:
linux系统: CentOS6.7
Hadoop版本: 2.6.5
zookeeper版本: 3.4.8
##主机配置:
######一共m1, m2, m3, m4, m5这五部机, 每部主机的用户名都为centos
“`
192.168.179.201: m1
192.168.179.202: m2
192.168.179.203: m3
192.168.179.204: m4
192.168.179.205: m5
m1: Namenode, YARN, ResourceManager
m2: Namenode, YARN, ResourceManager
m3: Zookeeper, DataNode, NodeManager
m4: Zookeeper, DataNode, NodeManager
m5: Zookeeper, DataNode, NodeManager
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##前期准备
####1.配置主机IP:
sudo vi /etc/sysconfig/network-scripts/ifcfg-eth0
####2.配置主机名:
sudo vi /etc/sysconfig/network
####3.配置主机名和IP的映射关系:
sudo vi /etc/hosts
####4.关闭防火墙
(1)临时关闭:
service iptables stop
service iptables status
(2)开机时自动关闭:
chkconfig iptables off
chkconfig iptables –list
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##搭建步骤：
####一.安装配置Zookeeper集群（在m3.m4,m5三部主机上）
####1.解压
tar -zxvf zookeeper-3.4.8.tar.gz -C /home/hadoop/soft/zookeeper
----
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####2.配置环境变量
vi /etc/profile
Zookeeper
export ZK_HOME=/home/centos/soft/zookeeper
export CLASSPATH=$CLASSPATH:$ZK_HOME/lib
export PATH=$PATH:$ZK_HOME/sbin:$ZK_HOME/bin
source /etc/profile
----
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####3.修改配置
(1)配置zoo.cfg文件
cd /home/centos/soft/zookeeper/conf/
cp zoo_sample.cfg zoo.cfg
vi zoo.cfg
修改dataDir此项配置
dataDir=/home/centos/soft/zookeeper/tmp
添加以下三项配置
server.1=m3:2888:3888
server.2=m4:2888:3888
server.3=m5:2888:3888
(2)创建tmp目录
mkdir /home/centos/soft/zookeeper/tmp
(3)编辑myid文件
touch /home/centos/soft/zookeeper/tmp/myid
echo 1 > /home/centos/soft/zookeeper/tmp/myid ## 在m3主机上myid=1
---
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####4.配置zookeeper日志存放位置
1. 编辑```zkEnv.sh```文件
vi /home/centos/soft/zookeeper/bin/zkEnv.sh
编辑下列该项配置
if [ “x${ZOO_LOG_DIR}” = “x” ]
then
ZOO_LOG_DIR=”/home/centos/soft/zookeeper/logs” ## 修改此项
fi
---
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(5)创建```logs```目录
mkdir /home/centos/soft/zookeeper/logs
---
####5. 拷贝到其他主机并修改myid
(1)拷贝到其他主机
scp -r /home/centos/soft/zookeeper/ m4:/home/centos/soft/
scp -r /home/centos/soft/zookeeper/ m5:/home/centos/soft/
(2)修改myid
echo 2 > /home/centos/soft/zookeeper/tmp/myid ## m4主机
echo 3 > /home/centos/soft/zookeeper/tmp/myid ## m5主机
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##二.安装配置hadoop集群
####1.解压
tar -zxvf hadoop-2.6.5.tar.gz -C /home/centos/soft/hadoop
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####2.将Hadoop配置进环境变量
vi /etc/profile
Java
export JAVA_HOME=/home/centos/soft/jdk
export CLASSPATH=$CLASSPATH:$JAVA_HOME/lib
export PATH=$PATH:$JAVA_HOME/bin
Hadoop
export HADOOP_USER_NAME=centos
export HADOOP_HOME=/home/centos/soft/hadoop
export CLASSPATH=$CLASSPATH:$HADOOP_HOME/lib
export PATH=$PATH:$HADOOP_HOME/bin
source /etc/profile
---
####3.编辑hadoop-env.sh文件
####1.编辑hadoop-env.sh文件
export JAVA_HOME=/home/centos/soft/jdk
---
####2.编辑core-site.xml文件
fs.defaultFS
hdfs://ns1
hadoop.tmp.dir
/home/centos/soft/hadoop/tmp
ha.zookeeper.quorum
m3:2181,m4:2181,m5:2181hadoop.proxyuser.centos.hosts*
hadoop.proxyuser.centos.groups*
“`
3.编辑hdfs-site.xml文件
<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>m1:9000</value>
</property>
<property>
<name>dfs.namenode.http-address.ns1.nn1</name>
<value>m1:50070</value>
</property>
<property>
<name>dfs.namenode.rpc-address.ns1.nn2</name>
<value>m2:9000</value>
</property>
<property>
<name>dfs.namenode.http-address.ns1.nn2</name>
<value>m2:50070</value>
</property>
<property>
<name>dfs.namenode.shared.edits.dir</name>
<value>qjournal://m3:8485;m4:8485;m5:8485/ns1</value>
</property>
<property>
<name>dfs.journalnode.edits.dir</name>
<value>/home/centos/soft/hadoop/journal</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>/home/centos/soft/hadoop/tmp/dfs/name</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>/home/centos/soft/hadoop/tmp/dfs/data</value>
</property>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.ha.automatic-failover.enabled</name>
<value>true</value>
</property>
<property>
<name>dfs.webhdfs.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>/home/centos/.ssh/id_rsa</value>
</property>
<property>
<name>dfs.ha.fencing.ssh.connect-timeout</name>
<value>30000</value>
</property>
<property>
<name>dfs.permissions</name>
<value>false</value>
</property>
<property>
<name>heartbeat.recheck.interval</name>
<value>2000</value>
</property>
<property>
<name>dfs.heartbeat.interval</name>
<value>1</value>
</property>
<property>
<name>dfs.blockreport.intervalMsec</name>
<value>3600000</value>
<description>Determines block reporting interval in milliseconds.</description>
</property>
</configuration>
4.编辑mapred-site.xml文件
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
<property>
<name>mapreduce.jobhistory.address</name>
<value>0.0.0.0:10020</value>
<description>MapReduce JobHistory Server IPC host:port</description>
</property>
<property>
<name>mapreduce.jobhistory.webapp.address</name>
<value>0.0.0.0:19888</value>
<description>MapReduce JobHistory Server Web UI host:port</description>
</property>
<property>
<name>mapreduce.task.io.sort.mb</name>
<value>1</value>
</property>
<property>
<name>yarn.app.mapreduce.am.staging-dir</name>
<value>/user</value>
</property>
<property>
<name>mapreduce.jobhistory.intermediate-done-dir</name>
<value>/user/history/done_intermediate</value>
</property>
<property>
<name>mapreduce.jobhistory.done-dir</name>
<value>/user/history</value>
</property>
</configuration>
5.编辑yarn-site.xml文件
<configuration>
<property>
<name>yarn.resourcemanager.ha.enabled</name>
<value>true</value>
</property>
<property>
<name>yarn.resourcemanager.cluster-id</name>
<value>yrc</value>
</property>
<property>
<name>yarn.resourcemanager.ha.rm-ids</name>
<value>rm1,rm2</value>
</property>
<property>
<name>yarn.resourcemanager.hostname.rm1</name>
<value>m1</value>
</property>
<property>
<name>yarn.resourcemanager.hostname.rm2</name>
<value>m2</value>
</property>
<property>
<name>yarn.resourcemanager.zk-address</name>
<value>m3:2181,m4:2181,m5:2181</value>
</property>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle,spark_shuffle</value>
</property>
<property>
<name>yarn.nodemanager.resource.memory-mb</name>
<value>2048</value>
</property>
<property>
<name>yarn.scheduler.maximum-allocation-mb</name>
<value>4096</value>
</property>
<property>
<name>yarn.nodemanager.log-dirs</name>
<value>/home/centos/soft/hadoop/logs</value>
</property>
<property>
<name>yarn.resourcemanager.scheduler.class</name>
<value>org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler</value>
</property>
<property>
<name>yarn.nodemanager.aux-services.spark_shuffle.class</name>
<value>org.apache.spark.network.yarn.YarnShuffleService</value>
</property>
<property>
<name>yarn.nodemanager.pmem-check-enabled</name>
<value>false</value>
<description>是否启动一个线程检查每个任务正使用的物理内存量，如果任务超出分配值，则直接将其杀掉，默认是true</description>
</property>
<property>
<name>yarn.nodemanager.vmem-check-enabled</name>
<value>false</value>
<description>是否启动一个线程检查每个任务正使用的物理内存量，如果任务超出分配值，则直接将其杀掉，默认是true</description>
</property>
<property>
<name>spark.shuffle.service.port</name>
<value>7337</value>
</property>
</configuration>
6.编辑slaves文件
编辑slaves文件, slaves是指定子节点的位置, 在HDFS上为DataNode的节点位置, 在YARN上为NodeManager的节点位置, 以你的实际情况而定
m3
m4
m5
##三.初始化Hadoop
####1. 配置主机之间免密码登陆
(1)在m1上生产一对密匙
“`
ssh-keygen -t rsa
“`
(2)将公钥拷贝到其他节点，包括本主机
ssh-coyp-id 127.0.0.1
ssh-coyp-id localhost
ssh-coyp-id m1
ssh-coyp-id m2
ssh-coyp-id m3
(3)在其他主机上重复(1)(2)的操作
####2.将配置好的hadoop拷贝到其他节点
“`
scp -r /home/centos/soft/hadoop m2:/home/centos/soft/
scp -r /home/centos/soft/hadoop m3:/home/centos/soft/
scp -r /home/centos/soft/hadoop m4:/home/centos/soft/
scp -r /home/centos/soft/hadoop m5:/home/centos/soft/
“`
####注意：严格按照下面的步骤
####3.启动zookeeper集群（分别在m3、m4、m5上启动zk)
1. 启动zookeeper服务
“`
cd /home/centos/soft/zookeeper-3.4.5/bin/
“`
“`
./zkServer.sh start
“`
- 查看状态：一个leader，两个follower
./zkServer.sh status
4.启动journalnode (分别在m3、m4、m5主机上执行, 必须在HDFS格式化前执行, 不然会报错)
(1)启动JournalNode服务
cd /home/centos/soft/hadoop
sbin/hadoop-daemon.sh start journalnode
(2)运行jps命令检验，m3、m4、m5上多了JournalNode进程
jps
####5.格式化HDFS(在m1上执行即可)
(1)在m1上执行命令:
“`
hdfs namenode -format
“`
(2)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/home/centos/soft/hadoop/tmp，然后将m1主机上的/home/centos/soft/hadoop下的tmp目录拷贝到m2主机上的/home/centos/soft/hadoop目录下
scp -r /home/centos/soft/hadoop/tmp/ m2:/home/centos/soft/hadoop/
6.格式化ZK(在m1上执行)
hdfs zkfc -formatZK
7.启动HDFS(在m1上执行)
sbin/start-dfs.sh
8.启动YARN(在m1,m2上执行)
sbin/start-yarn.sh
#### 至此，Hadoop-2.6.5配置完毕!!!
####四.检验Hadoop集群搭建成功
#######0.在Windows下编辑hosts文件, 配置主机名与IP的映射(此步骤可跳过)**
“`
C:\Windows\System32\drivers\etc\hosts
192.168.179.201 m1
192.168.179.202 m2
192.168.179.203 m3
192.168.179.204 m4
192.168.179.205 m5
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######1.可以统计浏览器访问:
http://m1:50070
NameNode \’m1:9000\’ (active)
http://m2:50070
NameNode \’m2:9000\’ (standby)
---
######2.验证HDFS HA
1. 首先向hdfs上传一个文件
hadoop fs -put /etc/profile /profile
2. 查看是否已上传到HDFS上
hadoop fs -ls /
3. 然后再kill掉active的NameNode
kill -9
4. 通过浏览器访问：http://m2:50070
NameNode \’m2:9000\’ (active) ## 主机m2上的NameNode变成了active
5. 执行命令：
hadoop fs -ls / ## 看之前在m1上传的文件是否还存在！！！
6. 手动在m1上启动挂掉的NameNode
sbin/hadoop-daemon.sh start namenode
7. 通过浏览器访问：http://m1:50070
NameNode \’m1:9000\’ (standby)
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######3.验证YARN：
1. 用浏览器访问: http://m1:8088, 查看是否有NodeManager服务在运行
2. 运行一下hadoop提供的demo中的WordCount程序, 在linux上执行以下命令
hadoop jar /home/centos/soft/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.6.5.jar wordcount InputParameter OutputParameter
####在http://m1:8088 上是否有application在运行,若有则YARN没问题
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####OK，大功告成！！！
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