大数据集群搭建之Linux安装hadoop3.0.0

2021-04-27 12:24:22 浏览数 (1)

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一、安装准备

1、下载地址

https://www.apache.org/dyn/closer.cgi/hadoop/common

2、参考文档

https://hadoop.apache.org/docs/r3.0.0/hadoop-project-dist/hadoop-common/ClusterSetup.html

3、ssh免密配置

https://cloud.tencent.com/developer/article/1818611

4、zookeeper安装

https://cloud.tencent.com/developer/article/1818643

5、集群角色分配

hadoop集群角色

集群节点

NameNode

hadoop001、hadoop002

DataNode

hadoop003、hadoop004、hadoop005

JournalNode

hadoop003、hadoop004、hadoop005

ResourceManager

hadoop001、hadoop002

NodeManager

hadoop003、hadoop004、hadoop005

DFSZKFailoverController

hadoop001、hadoop002

二、解压安装

解压文件

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cd /usr/local/hadoop
tar zxpf hadoop-3.0.0.tar.gz

创建软链接

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ln -s  hadoop-3.0.0 hadoop

三、环境变量配置

编辑 /etc/profile 文件

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vim /etc/profile

添加以下内容

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export HADOOP_HOME=/usr/local/hadoop/hadoop
export PATH=$PATH:$HADOOP_HOME/bin

四、修改配置文件

1、检查磁盘空间

首先查看磁盘挂载空间，避免hadoop的数据放在挂载空间小的目录

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df -h

磁盘一共800G，home目录占了741G，故以下配置目录都会以 /home开头 

2、修改配置文件

worker

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hadoop003
hadoop004
hadoop005

core-site.xml

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		fs.defaultFS
		hdfs://ns1
	
	
		hadoop.tmp.dir
		/home/cluster/hadoop/data/tmp
	
	
		io.file.buffer.size
		131072
		Size of read/write buffer used in SequenceFiles
	
	
		ha.zookeeper.quorum
		hadoop001:2181,hadoop002:2181,hadoop003:2181
		DFSZKFailoverController

hadoop-env.sh

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export HDFS_NAMENODE_OPTS="-XX: UseParallelGC -Xmx4g"
export HDFS_NAMENODE_USER=root
export HDFS_DATANODE_USER=root
export HDFS_JOURNALNODE_USER=root
export HDFS_SECONDARYNAMENODE_USER=root
export YARN_RESOURCEMANAGER_USER=root
export YARN_NODEMANAGER_USER=root
export JAVA_HOME=/usr/java/jdk1.8

hdfs-site.xml

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		dfs.namenode.name.dir
		/home/cluster/hadoop/data/nn
	
	
		dfs.datanode.data.dir
		/home/cluster/hadoop/data/dn
	
	
    
        dfs.journalnode.edits.dir
        /home/cluster/hadoop/data/jn
    
    
        dfs.nameservices
        ns1
    
    
        dfs.ha.namenodes.ns1
        hadoop001,hadoop002
    
    
        dfs.namenode.rpc-address.ns1.hadoop001
        hadoop001:9000
    
    
        dfs.namenode.http-address.ns1.hadoop001
        hadoop001:50070
    
    
        dfs.namenode.rpc-address.ns1.hadoop002
        hadoop002:9000
    
    
        dfs.namenode.http-address.ns1.hadoop002
        hadoop002:50070
    
    
        dfs.ha.automatic-failover.enabled.ns1
        true
    
    
        dfs.client.failover.proxy.provider.ns1
        org.apache.hadoop.hdfs.server.namenode.ha.ConfiguredFailoverProxyProvider
    
	
        dfs.permissions.enabled
        false
    
	
        dfs.replication
        3
    
	
		dfs.blocksize
        64M
		
		HDFS blocksize of 128MB for large file-systems
	
	
		dfs.namenode.handler.count
		100
		More NameNode server threads to handle RPCs from large number of DataNodes.
	

    
    
        dfs.namenode.shared.edits.dir
        qjournal://hadoop001:8485;hadoop002:8485;hadoop003:8485/ns1
    
    
    
     dfs.ha.fencing.methods
     sshfence
    
    
    dfs.ha.fencing.ssh.private-key-files
    /root/.ssh/id_rsa

mapred-site.xml

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		mapreduce.framework.name
		yarn
		Execution framework set to Hadoop YARN.
	
	
		mapreduce.map.memory.mb
		4096
		
		Larger resource limit for maps.
	
	
		mapreduce.map.java.opts
		-Xmx4096M
		
		Larger heap-size for child jvms of maps.
	
	
		mapreduce.reduce.memory.mb
		4096
		
		Larger resource limit for reduces.
	
	
		mapreduce.reduce.java.opts
		-Xmx4096M
		Larger heap-size for child jvms of reduces.
	
	
		mapreduce.task.io.sort.mb
		4096
		
		Higher memory-limit while sorting data for efficiency.
	
	
		mapreduce.task.io.sort.factor
		400
		
		More streams merged at once while sorting files.
	
	
		mapreduce.reduce.shuffle.parallelcopies
		200
		
		Higher number of parallel copies run by reduces to fetch outputs from very large number of maps.
	
	
	
		mapreduce.jobhistory.address
		hadoop001:10020
		MapReduce JobHistory Server host:port.Default port is 10020
	
	
		mapreduce.jobhistory.webapp.address
		hadoop001:19888
		MapReduce JobHistory Server Web UI host:port.Default port is 19888.
	
	
		mapreduce.jobhistory.intermediate-done-dir
		/tmp/mr-history/tmp
		Directory where history files are written by MapReduce jobs.
	
	
		mapreduce.jobhistory.done-dir
		/tmp/mr-history/done
		Directory where history files are managed by the MR JobHistory Server.

yarn-site.xml

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        yarn.resourcemanager.ha.enabled
        true
	
	
	
	    yarn.resourcemanager.ha.automatic-failover.enabled
	    true
	
	 
	
	    yarn.resourcemanager.ha.automatic-failover.embedded
	    true
	
	
        yarn.resourcemanager.cluster-id
        yarn-rm-cluster
	
	
	    yarn.resourcemanager.ha.rm-ids
	    rm1,rm2
	
	
	    yarn.resourcemanager.hostname.rm1
	    hadoop001
	
	
	    yarn.resourcemanager.hostname.rm2
	    hadoop002
	
	 
	
        yarn.resourcemanager.recovery.enabled
        true
	
	 
	
        yarn.resourcemanager.zk.state-store.address
        hadoop001:2181,hadoop002:2181,hadoop003:2181
	
	
        yarn.resourcemanager.zk-address
        hadoop001:2181,hadoop002:2181,hadoop003:2181
	
	
        yarn.resourcemanager.address.rm1
        hadoop001:8032
	
	
        yarn.resourcemanager.address.rm2
        hadoop002:8032
	
	
        yarn.resourcemanager.scheduler.address.rm1
        hadoop001:8034
	
	
        yarn.resourcemanager.webapp.address.rm1
        hadoop001:8088
	
	
        yarn.resourcemanager.scheduler.address.rm2
        hadoop002:8034
	
	
        yarn.resourcemanager.webapp.address.rm2
        hadoop002:8088
	

	
	
		yarn.acl.enable
		true
		Enable ACLs? Defaults to false.
	
	
		yarn.admin.acl
		*
		
	
		yarn.log-aggregation-enable
		false
		Configuration to enable or disable log aggregation
	
	
	
		yarn.resourcemanager.hostname
		hadoop001
		host Single hostname that can be set in place of setting all yarn.resourcemanager*address resources. Results in default ports for ResourceManager components.
	
	
	
		yarn.scheduler.maximum-allocation-mb
		20480
	
	
		yarn.nodemanager.resource.memory-mb
		28672
	
	
	
		yarn.nodemanager.log.retain-seconds
		10800
	
	
		yarn.nodemanager.log-dirs
		/home/cluster/yarn/log/1,/home/cluster/yarn/log/2,/home/cluster/yarn/log/3
	
	
		yarn.nodemanager.aux-services
		mapreduce_shuffle
		Shuffle service that needs to be set for Map Reduce applications.
	
	
	
	
		yarn.log-aggregation.retain-seconds
		-1
	
	
		yarn.log-aggregation.retain-check-interval-seconds
		-1

五、初始化集群

1、启动zookeeper

由于hadoop的HA机制依赖于zookeeper，因此先启动zookeeper集群

如果zookeeper集群没有搭建参考：https://cloud.tencent.com/developer/article/1818643

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zkServer.sh start
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zkServer.sh status

2、在zookeeper中初始化元数据

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hdfs zkfc -formatZK

3、启动zkfc

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hdfs --daemon start zkfc

4、启动JournalNode

格式化NameNode前必须先格式化JournalNode，否则格式化失败

这里配置了3个JournalNode节点，hadoop001、hadoop002、hadoop003

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hdfs --daemon start journalnode

5、格式化NameNode

在第一台NameNode节点上执行

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hdfs namenode -format

6、启动hdfs

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start-all.sh

7、同步备份NameNode

等hdfs初始化完成之后（20秒），在另一台NameNode上执行

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hdfs namenode -bootstrapStandby

 如果格式化失败或者出现以下错误，把对应节点上的目录删掉再重新格式化

Directory is in an inconsistent state: Can't format the storage directory because the current directory is not empty.

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rm -rf /home/cluster/hadoop/data/jn/ns1/*
hdfs namenode -format

8、启动备份NameNode

同步之后，需要在另一台NameNode节点上启动NameNode进程

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hdfs --daemon start namenode

9、查看集群状态

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hadoop dfsadmin -report

10、访问集群

http://hadoop001:50070/

http://hadoop002:50070/

六、集群高可用测试

1、停止Active状态的NameNode

在active状态上的NameNode执行（hadoop1）

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hdfs --daemon stop namenode

2、查看standby状态的NameNode

http://hadoop002:50070/ 可以看到，hadoop2从standby变成了active状态

3、重启启动停止的NameNode

停止之后，浏览器无法访问，重启恢复

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hdfs --daemon start namenode

4、查看两个NameNode状态

http://hadoop001:50070/

http://hadoop002:50070/

hadoop zookeeper https http 网络安全

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