Hadoop-SetupENV

环境：

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Xshell: 5

Xftp: 4

Virtual Box: 5.16

Linux: CentOS-7-x86_64-Minimal-1511

Vim: yum -y install vim-enhanced

JDK: 8

Hadoop: 2.7.3.tar.gz

在Virtual Box中安装完成 Linux后，设置网卡为自动启动：

检查机器网卡：

nmcli d

可以看到有一个网卡：enp0s3

用vi打开网卡配置文件：

vi /etc/sysconfig/network-scirpts/ifcfg-enp0s3

修改最后一行：ONBOOT=no -> ONBOOT=yes

安装Hadoop

[root@centosmaster opt]# tar zxf hadoop-2.7.3.tar.gz
[root@centosmaster opt]# cd hadoop-2.7.3
[root@centosmaster opt]# cd /opt/hadoop-2.7.3/etc/hadoop

core-site.xml

  
    fs.defaultFS
    hdfs://CentOS_105:9000
  
  
    hadoop.tmp.dir
    file:/opt/hadoop-2.7.3/current/tmp
  
  
      
    fs.trash.interval
    8
  

hdfs-site.xml

	
		dfs.namenode.name.dir
		/opt/hadoop-2.7.3/current/dfs/name
	
	
		dfs.datanode.data.dir
		/opt/hadoop-2.7.3/current/data
	
	
	
		dfs.replication
		1
	
	
		dfs.webhdfs.enabled
		true
	
	
		dfs.permissions.superusergroup
		staff
	
	
		dfs.permissions.enabled
		false
	

yarn-site.xml

  
     yarn.resourcemanager.hostname
     centosmaster
   
  
     yarn.nodemanager.aux.services
     mapreduce_shuffle
   
  
     yarn.nodemanager.aux-services.mapreduce.shuffle.class
     org.apache.hadoop.mapred.ShuffleHandler
   
  
     yarn.resourcemanager.address
     centosmaster:18040
   
  
     yarn.resourcemanager.scheduler.address
     centosmaster:18030
   
  
     yarn.resourcemanager.resource.tracker.address
     centosmaster:18025
   
  
     yarn.resourcemanager.manager.admin.address
     centosmaster:18141
   
  
     yarn.resourcemanager.webapp.address
     centosmaster:18088
   
  
     yarn.log-aggregation-enable
     true
   
  
     yarn.log-aggregation.retain-seconds
     86400
   
  
    yarn.log-aggregation.retain-check-interval-seconds
     86400
   
  
     yarn.nodemanager.remote-app-log-dir
     /tmp/logs
   
  
     yarn.nodemanager.remote-app-log-dir-suffix
     logs
   

mapred-site.xml

  
     mapreduce.foramework.name
     yarn
   
  
     mapreduce.jobtracker.http.address
     centosmaster:50030
   
  
     mapreduce.jobhistory.address
     centosmaster:10020
   
  
     mapreduce.jobhistory.webapp.address
     centosmaster:19888
   
  
     mapreduce.jobhistory.done.dir
     /jobhistory/done
  
  
     mapreduce.intermediate-done-dir
     /jobhistory/one_intermediate
   
  
     mapreduce.job.ubertask.enable
     true
   

在Slaves文件中添加本机ip，指定本机为Slave：

centosmaster

给hadoop指定java jdk

vim hadoop-env.sh
# The java implementation to use.
export JAVA_HOME=/usr/java/jdk1.8.0_111/

格式化HDFS文件系统

[root@centosmaster~]# hdfs namenode -format
************************************************************/
16/10/23 08:58:31 INFO namenode.NameNode: registered UNIX signal handlers for [TERM, HUP, INT]
16/10/23 08:58:31 INFO namenode.NameNode: createNameNode [-format]
16/10/23 08:58:31 WARN common.Util: Path /opt/hadoop-2.7.3/current/dfs/name should be specified as a URI in configuration files. Please update hdfs configuration.
16/10/23 08:58:31 WARN common.Util: Path /opt/hadoop-2.7.3/current/dfs/name should be specified as a URI in configuration files. Please update hdfs configuration.
Formatting using clusterid: CID-1294bdbb-d45c-49f3-b5c5-3d26934e084f
16/10/23 08:58:32 INFO namenode.FSNamesystem: No KeyProvider found.
16/10/23 08:58:32 INFO namenode.FSNamesystem: fsLock is fair:true
16/10/23 08:58:32 INFO blockmanagement.DatanodeManager: dfs.block.invalidate.limit=1000
16/10/23 08:58:32 INFO blockmanagement.DatanodeManager: dfs.namenode.datanode.registration.ip-hostname-check=true
16/10/23 08:58:32 INFO blockmanagement.BlockManager: dfs.namenode.startup.delay.block.deletion.sec is set to 000:00:00:00.000
16/10/23 08:58:32 INFO blockmanagement.BlockManager: The block deletion will start around 2016 Oct 23 08:58:32
16/10/23 08:58:32 INFO util.GSet: Computing capacity for map BlocksMap
16/10/23 08:58:32 INFO util.GSet: VM type       = 64-bit
16/10/23 08:58:32 INFO util.GSet: 2.0% max memory 966.7 MB = 19.3 MB
16/10/23 08:58:32 INFO util.GSet: capacity      = 2^21 = 2097152 entries
16/10/23 08:58:32 INFO blockmanagement.BlockManager: dfs.block.access.token.enable=false
16/10/23 08:58:32 INFO blockmanagement.BlockManager: defaultReplication         = 1
16/10/23 08:58:32 INFO blockmanagement.BlockManager: maxReplication             = 512
16/10/23 08:58:32 INFO blockmanagement.BlockManager: minReplication             = 1
16/10/23 08:58:32 INFO blockmanagement.BlockManager: maxReplicationStreams      = 2
16/10/23 08:58:32 INFO blockmanagement.BlockManager: replicationRecheckInterval = 3000
16/10/23 08:58:32 INFO blockmanagement.BlockManager: encryptDataTransfer        = false
16/10/23 08:58:32 INFO blockmanagement.BlockManager: maxNumBlocksToLog          = 1000
16/10/23 08:58:32 INFO namenode.FSNamesystem: fsOwner             = root (auth:SIMPLE)
16/10/23 08:58:32 INFO namenode.FSNamesystem: supergroup          = staff
16/10/23 08:58:32 INFO namenode.FSNamesystem: isPermissionEnabled = false
16/10/23 08:58:32 INFO namenode.FSNamesystem: HA Enabled: false
16/10/23 08:58:32 INFO namenode.FSNamesystem: Append Enabled: true
16/10/23 08:58:32 INFO util.GSet: Computing capacity for map INodeMap
16/10/23 08:58:32 INFO util.GSet: VM type       = 64-bit
16/10/23 08:58:32 INFO util.GSet: 1.0% max memory 966.7 MB = 9.7 MB
16/10/23 08:58:32 INFO util.GSet: capacity      = 2^20 = 1048576 entries
16/10/23 08:58:32 INFO namenode.FSDirectory: ACLs enabled? false
16/10/23 08:58:32 INFO namenode.FSDirectory: XAttrs enabled? true
16/10/23 08:58:32 INFO namenode.FSDirectory: Maximum size of an xattr: 16384
16/10/23 08:58:32 INFO namenode.NameNode: Caching file names occuring more than 10 times
16/10/23 08:58:32 INFO util.GSet: Computing capacity for map cachedBlocks
16/10/23 08:58:32 INFO util.GSet: VM type       = 64-bit
16/10/23 08:58:32 INFO util.GSet: 0.25% max memory 966.7 MB = 2.4 MB
16/10/23 08:58:32 INFO util.GSet: capacity      = 2^18 = 262144 entries
16/10/23 08:58:32 INFO namenode.FSNamesystem: dfs.namenode.safemode.threshold-pct = 0.9990000128746033
16/10/23 08:58:32 INFO namenode.FSNamesystem: dfs.namenode.safemode.min.datanodes = 0
16/10/23 08:58:32 INFO namenode.FSNamesystem: dfs.namenode.safemode.extension     = 30000
16/10/23 08:58:32 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.window.num.buckets = 10
16/10/23 08:58:32 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.num.users = 10
16/10/23 08:58:32 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.windows.minutes = 1,5,25
16/10/23 08:58:32 INFO namenode.FSNamesystem: Retry cache on namenode is enabled
16/10/23 08:58:32 INFO namenode.FSNamesystem: Retry cache will use 0.03 of total heap and retry cache entry expiry time is 600000 millis
16/10/23 08:58:32 INFO util.GSet: Computing capacity for map NameNodeRetryCache
16/10/23 08:58:32 INFO util.GSet: VM type       = 64-bit
16/10/23 08:58:32 INFO util.GSet: 0.029999999329447746% max memory 966.7 MB = 297.0 KB
16/10/23 08:58:32 INFO util.GSet: capacity      = 2^15 = 32768 entries
16/10/23 08:58:32 INFO namenode.FSImage: Allocated new BlockPoolId: BP-1532573559-192.168.0.105-1477184312651
16/10/23 08:58:32 INFO common.Storage: Storage directory /opt/hadoop-2.7.3/current/dfs/name has been successfully formatted.
16/10/23 08:58:32 INFO namenode.FSImageFormatProtobuf: Saving p_w_picpath file /opt/hadoop-2.7.3/current/dfs/name/current/fsp_w_picpath.ckpt_0000000000000000000 using no compression
16/10/23 08:58:32 INFO namenode.FSImageFormatProtobuf: Image file /opt/hadoop-2.7.3/current/dfs/name/current/fsp_w_picpath.ckpt_0000000000000000000 of size 346 bytes saved in 0 seconds.
16/10/23 08:58:32 INFO namenode.NNStorageRetentionManager: Going to retain 1 p_w_picpaths with txid >= 0
16/10/23 08:58:32 INFO util.ExitUtil: Exiting with status 0
16/10/23 08:58:32 INFO namenode.NameNode: SHUTDOWN_MSG: 
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at CentOS_105/192.168.0.105

************************************************************/

从打出的Log文件可以看到格式化成功：

INFO common.Storage: Storage directory /opt/hadoop-2.7.3/current/dfs/name has been successfully formatted.

hdfs的路径有个warning，需要修改hdfs-site.xml

dfs.namenode.name.dir

/opt/hadoop-2.7.3/current/dfs/name

file:///opt/hadoop-2.7.3/current/dfs/name

重新新格式化：

hdfs namenode -format

查看host:

hostnamectl

修改hostname:

[root@centosmaster~]#Hostnamectl set-hostname "centosmaster"

启动hadoop:

[root@centosmaster hadoop-2.7.3]# sbin/start-all.sh 
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
Starting namenodes on [localhost]
localhost: starting namenode, logging to /opt/hadoop-2.7.3/logs/hadoop-root-namenode-centosmaster.out
centosmaster: starting datanode, logging to /opt/hadoop-2.7.3/logs/hadoop-root-datanode-centosmaster.out
Starting secondary namenodes [Centosmaster]
Centosmaster: starting secondarynamenode, logging to /opt/hadoop-2.7.3/logs/hadoop-root-secondarynamenode-centosmaster.out
starting yarn daemons
starting resourcemanager, logging to /opt/hadoop-2.7.3/logs/yarn-root-resourcemanager-centosmaster.out
centosmaster: starting nodemanager, logging to /opt/hadoop-2.7.3/logs/yarn-root-nodemanager-centosmaster.out

用Jps查看启动了什么节点：

[root@centosmaster hadoop]# jps
2546 NodeManager
3090 SecondaryNameNode
3348 Jps
2201 DataNode
2109 NameNode
2447 ResourceManager

停止Hadoop:

sbin/stop-all.sh

验证：

问题1-权限：

[root@CentOS_105 jdk1.8.0_111]# java -version
bash: /usr/java/jdk1.8.0_111//bin/java: Permission denied

解决：chmod 777 /usr/java/jdk1.8.0_111/bin/java

问题2-配置：

[root@centos_1 hadoop-2.7.3]# sbin/start-all.sh
This script is Deprecated. Instead use start-dfs.sh and start-yarn.sh
Incorrect configuration: namenode address dfs.namenode.servicerpc-address or dfs.namenode.rpc-address is not configured.
Starting namenodes on []

解决：在etc/hadoop/core-site.xml中增加配置：

  fs.default.name
  hdfs://127.0.0.1:9000

问题3-Hostname

Does not contain a valid host:port authority:

原因：Hadoop的xml配置中会因为某些特殊字符而不正常.

解决：主机使用的hostname不合法，修改为不包含着‘.’ '/' '_'等非法字符的主机名

参阅

网卡配置信息：http://www.krizna.com/centos/setup-network-centos-7/

JDK安装详解：http://www.cnblogs.com/wangfajun/p/5257899.html