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教程|Hadoop集群搭建和简单应用

作者：haohao | 来源：互联网 | 2023-08-08 20:48

这是小小本周的第一篇，我是小小，开更本周的第一篇，本篇将会介绍Hadoop集群的简单搭建和简单应用。概念了解主从结构：在一个

这是小小本周的第一篇&＃xff0c;我是小小&＃xff0c;开更本周的第一篇&＃xff0c;本篇将会介绍Hadoop集群的简单搭建和简单应用。

概念了解

主从结构&＃xff1a;在一个集群众&＃xff0c;会有部分节点充当主节点的角色&＃xff0c;其他服务器都是从节点的角色&＃xff0c;当前这种架构称之为主从结构。主从结构分类&＃xff1a;

一主多从
多主多从 Hadoop中的HDFS和YARN都是主从结构&＃xff0c;各个角色的名称&＃xff0c;以及主从结构的概念方式 | 服务 | 主节点 | 从节点 | |------|------|----------| |HDFS | NameNode | DataNode | | YARN | ResourceManager | NodeManager |

集群服务器规划

使用四台Centos虚拟机进行集群搭建

安装

规划

规划安装用户&＃xff1a;hadoop

规划安装目录&＃xff1a;/home/hadoop/apps

规划数据目录&＃xff1a;/home/hadoop/data

注&＃xff1a;apps和data文件夹需要自己单独创建

上传解压缩

使用Hadoop用户

[hadoop&＃64;hadoop1 apps]$ ls hadoop-2.7.5-centos-6.7.tar.gz [hadoop&＃64;hadoop1 apps]$ tar -zxvf hadoop-2.7.5-centos-6.7.tar.gz

修改配置文件

配置文件目录&＃xff1a;/home/hadoop/apps/hadoop-2.7.5/etc/hadoop

hadoop-env.sh

[hadoop&＃64;hadoop1 hadoop]$ vi hadoop-env.sh

修改JAVA_HOME

export JAVA_HOME&＃61;/usr/local/jdk1.8.0_73

core-site.xml

[hadoop&＃64;hadoop1 hadoop]$ vi core-site.xml

fs.defaultFS &＃xff1a;这个属性用来指定namenode的hdfs协议的文件系统通信地址&＃xff0c;可以指定一个主机&＃43;端口&＃xff0c;也可以指定为一个namenode服务&＃xff08;这个服务内部可以有多台namenode实现ha的namenode服务

hadoop.tmp.dir : hadoop集群在工作的时候存储的一些临时文件的目录

fs.defaultFShdfs://hadoop1:9000hadoop.tmp.dir/home/hadoop/data/hadoopdata

hdfs-site.xml

[hadoop&＃64;hadoop1 hadoop]$ vi hdfs-site.xml

dfs.namenode.name.dir&＃xff1a;namenode数据的存放地点。也就是namenode元数据存放的地方&＃xff0c;记录了hdfs系统中文件的元数据。

dfs.datanode.data.dir&＃xff1a;datanode数据的存放地点。也就是block块存放的目录了。

dfs.replication&＃xff1a;hdfs的副本数设置。也就是上传一个文件&＃xff0c;其分割为block块后&＃xff0c;每个block的冗余副本个数&＃xff0c;默认配置是3。

dfs.secondary.http.address&＃xff1a;secondarynamenode 运行节点的信息&＃xff0c;和 namenode 不同节点

dfs.namenode.name.dir/home/hadoop/data/hadoopdata/name为了保证元数据的安全一般配置多个不同目录dfs.datanode.data.dir/home/hadoop/data/hadoopdata/datadatanode 的数据存储目录dfs.replication2HDFS 的数据块的副本存储个数, 默认是3dfs.secondary.http.addresshadoop3:50090secondarynamenode 运行节点的信息&＃xff0c;和 namenode 不同节点

mapred-site.xml

[hadoop&＃64;hadoop1 hadoop]$ cp mapred-site.xml.template mapred-site.xml [hadoop&＃64;hadoop1 hadoop]$ vi mapred-site.xml

mapreduce.framework.name&＃xff1a;指定mr框架为yarn方式,Hadoop二代MP也基于资源管理系统Yarn来运行。

mapreduce.framework.nameyarn

yarn-site.xml

[hadoop&＃64;hadoop1 hadoop]$ vi yarn-site.xml

yarn.resourcemanager.hostname&＃xff1a;yarn总管理器的IPC通讯地址

yarn.nodemanager.aux-services&＃xff1a;

yarn.resourcemanager.hostnamehadoop4yarn.nodemanager.aux-servicesmapreduce_shuffleYARN 集群为 MapReduce 程序提供的 shuffle 服务

slaves

[hadoop&＃64;hadoop1 hadoop]$ vi slaves

hadoop1 hadoop2 hadoop3 hadoop4

安装包分发给其他节点

[hadoop&＃64;hadoop1 hadoop]$ scp -r ~/apps/hadoop-2.7.5/ hadoop2:~/apps/ [hadoop&＃64;hadoop1 hadoop]$ scp -r ~/apps/hadoop-2.7.5/ hadoop3:~/apps/ [hadoop&＃64;hadoop1 hadoop]$ scp -r ~/apps/hadoop-2.7.5/ hadoop4:~/apps/

配置环境变量

[hadoop&＃64;hadoop1 ~]$ vi .bashrc

export HADOOP_HOME&＃61;/home/hadoop/apps/hadoop-2.7.5 export PATH&＃61;$PATH:$HADOOP_HOME/bin:$HADOOP_HOME/sbin:

环境变量生效

[hadoop&＃64;hadoop1 bin]$ source ~/.bashrc

查看Hadoop版本

[hadoop&＃64;hadoop1 bin]$ hadoop version Hadoop 2.7.5 Subversion Unknown -r Unknown Compiled by root on 2017-12-24T05:30Z Compiled with protoc 2.5.0 From source with checksum 9f118f95f47043332d51891e37f736e9 This command was run using /home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/hadoop-common-2.7.5.jar [hadoop&＃64;hadoop1 bin]$

在主节点上对Hadoop进行初始化

[hadoop&＃64;hadoop1 ~]$ hadoop namenode -format

1 [hadoop&＃64;hadoop1 ~]$ hadoop namenode -format2 DEPRECATED: Use of this script to execute hdfs command is deprecated.3 Instead use the hdfs command for it.45 18/03/03 11:13:24 INFO namenode.NameNode: STARTUP_MSG:6 /************************************************************7 STARTUP_MSG: Starting NameNode8 STARTUP_MSG: host &＃61; hadoop1/192.168.123.1029 STARTUP_MSG: args &＃61; [-format] 10 STARTUP_MSG: version &＃61; 2.7.5 11 STARTUP_MSG: classpath &＃61; /home/hadoop/apps/hadoop-2.7.5/etc/hadoop:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/paranamer-2.3.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/httpclient-4.2.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jackson-mapper-asl-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jets3t-0.9.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-net-3.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/apacheds-i18n-2.0.0-M15.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jetty-sslengine-6.1.26.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jetty-6.1.26.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-math3-3.1.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jsr305-3.0.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jaxb-impl-2.2.3-1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jsch-0.1.54.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-cli-1.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jsp-api-2.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/hadoop-auth-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/servlet-api-2.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/mockito-all-1.8.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/zookeeper-3.4.6.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jackson-core-asl-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-io-2.4.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-logging-1.1.3.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jaxb-api-2.2.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jersey-server-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/log4j-1.2.17.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/guava-11.0.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jersey-json-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/xz-1.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-lang-2.6.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/gson-2.2.4.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/httpcore-4.2.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-compress-1.4.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/java-xmlbuilder-0.4.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-httpclient-3.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jettison-1.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/slf4j-api-1.7.10.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/api-asn1-api-1.0.0-M20.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/api-util-1.0.0-M20.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/xmlenc-0.52.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/hadoop-annotations-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-beanutils-core-1.8.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-codec-1.4.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/protobuf-java-2.5.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/asm-3.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/curator-framework-2.7.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/apacheds-kerberos-codec-2.0.0-M15.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/htrace-core-3.1.0-incubating.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/curator-client-2.7.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-digester-1.8.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/activation-1.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jackson-xc-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-beanutils-1.7.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jetty-util-6.1.26.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/stax-api-1.0-2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/avro-1.7.4.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jersey-core-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/junit-4.11.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/netty-3.6.2.Final.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/jackson-jaxrs-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-collections-3.2.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/hamcrest-core-1.3.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/curator-recipes-2.7.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/commons-configuration-1.6.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/lib/snappy-java-1.0.4.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/hadoop-common-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/hadoop-nfs-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/common/hadoop-common-2.7.5-tests.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/jackson-mapper-asl-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/xercesImpl-2.9.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/jetty-6.1.26.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/jsr305-3.0.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/commons-cli-1.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/servlet-api-2.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/netty-all-4.0.23.Final.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/jackson-core-asl-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/commons-io-2.4.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/commons-logging-1.1.3.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/jersey-server-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/log4j-1.2.17.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/guava-11.0.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/commons-daemon-1.0.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/commons-lang-2.6.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/leveldbjni-all-1.8.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/xml-apis-1.3.04.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/xmlenc-0.52.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/commons-codec-1.4.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/protobuf-java-2.5.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/asm-3.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/htrace-core-3.1.0-incubating.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/jetty-util-6.1.26.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/jersey-core-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/lib/netty-3.6.2.Final.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/hadoop-hdfs-nfs-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/hadoop-hdfs-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/hdfs/hadoop-hdfs-2.7.5-tests.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jackson-mapper-asl-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jetty-6.1.26.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jsr305-3.0.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jaxb-impl-2.2.3-1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/guice-servlet-3.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/commons-cli-1.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/servlet-api-2.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/zookeeper-3.4.6.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jackson-core-asl-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/commons-io-2.4.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/zookeeper-3.4.6-tests.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/commons-logging-1.1.3.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jaxb-api-2.2.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jersey-server-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/log4j-1.2.17.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/aopalliance-1.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/guava-11.0.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jersey-json-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/javax.inject-1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/xz-1.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/commons-lang-2.6.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/leveldbjni-all-1.8.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/commons-compress-1.4.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jersey-client-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jersey-guice-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jettison-1.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/commons-codec-1.4.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/protobuf-java-2.5.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/guice-3.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/asm-3.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/activation-1.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jackson-xc-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jetty-util-6.1.26.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/stax-api-1.0-2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jersey-core-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/netty-3.6.2.Final.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/jackson-jaxrs-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/lib/commons-collections-3.2.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-server-resourcemanager-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-client-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-server-nodemanager-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-server-tests-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-common-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-server-web-proxy-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-api-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-server-sharedcachemanager-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-server-common-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-registry-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-applications-unmanaged-am-launcher-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-server-applicationhistoryservice-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/yarn/hadoop-yarn-applications-distributedshell-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/paranamer-2.3.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/jackson-mapper-asl-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/guice-servlet-3.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/jackson-core-asl-1.9.13.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/commons-io-2.4.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/jersey-server-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/log4j-1.2.17.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/aopalliance-1.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/javax.inject-1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/xz-1.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/leveldbjni-all-1.8.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/commons-compress-1.4.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/jersey-guice-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/hadoop-annotations-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/protobuf-java-2.5.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/guice-3.0.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/asm-3.2.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/avro-1.7.4.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/jersey-core-1.9.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/junit-4.11.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/netty-3.6.2.Final.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/hamcrest-core-1.3.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/lib/snappy-java-1.0.4.1.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/hadoop-mapreduce-client-app-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.7.5-tests.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/hadoop-mapreduce-client-common-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/hadoop-mapreduce-client-shuffle-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-plugins-2.7.5.jar:/home/hadoop/apps/hadoop-2.7.5/contrib/capacity-scheduler/*.jar:/home/hadoop/apps/hadoop-2.7.5/contrib/capacity-scheduler/*.jar 12 STARTUP_MSG: build &＃61; Unknown -r Unknown; compiled by &＃39;root&＃39; on 2017-12-24T05:30Z 13 STARTUP_MSG: java &＃61; 1.8.0_73 14 ************************************************************/ 15 18/03/03 11:13:24 INFO namenode.NameNode: registered UNIX signal handlers for [TERM, HUP, INT] 16 18/03/03 11:13:24 INFO namenode.NameNode: createNameNode [-format] 17 18/03/03 11:13:25 WARN common.Util: Path /home/hadoop/data/hadoopdata/name should be specified as a URI in configuration files. Please update hdfs configuration. 18 18/03/03 11:13:25 WARN common.Util: Path /home/hadoop/data/hadoopdata/name should be specified as a URI in configuration files. Please update hdfs configuration. 19 Formatting using clusterid: CID-5cc0d14d-6100-4a01-b12c-d1ebfdbd8531 20 18/03/03 11:13:25 INFO namenode.FSNamesystem: No KeyProvider found. 21 18/03/03 11:13:25 INFO namenode.FSNamesystem: fsLock is fair: true 22 18/03/03 11:13:25 INFO namenode.FSNamesystem: Detailed lock hold time metrics enabled: false 23 18/03/03 11:13:25 INFO blockmanagement.DatanodeManager: dfs.block.invalidate.limit&＃61;1000 24 18/03/03 11:13:25 INFO blockmanagement.DatanodeManager: dfs.namenode.datanode.registration.ip-hostname-check&＃61;true 25 18/03/03 11:13:25 INFO blockmanagement.BlockManager: dfs.namenode.startup.delay.block.deletion.sec is set to 000:00:00:00.000 26 18/03/03 11:13:25 INFO blockmanagement.BlockManager: The block deletion will start around 2018 三月 03 11:13:25 27 18/03/03 11:13:25 INFO util.GSet: Computing capacity for map BlocksMap 28 18/03/03 11:13:25 INFO util.GSet: VM type &＃61; 64-bit 29 18/03/03 11:13:25 INFO util.GSet: 2.0% max memory 966.7 MB &＃61; 19.3 MB 30 18/03/03 11:13:25 INFO util.GSet: capacity &＃61; 2^21 &＃61; 2097152 entries 31 18/03/03 11:13:25 INFO blockmanagement.BlockManager: dfs.block.access.token.enable&＃61;false 32 18/03/03 11:13:25 INFO blockmanagement.BlockManager: defaultReplication &＃61; 2 33 18/03/03 11:13:25 INFO blockmanagement.BlockManager: maxReplication &＃61; 512 34 18/03/03 11:13:25 INFO blockmanagement.BlockManager: minReplication &＃61; 1 35 18/03/03 11:13:25 INFO blockmanagement.BlockManager: maxReplicationStreams &＃61; 2 36 18/03/03 11:13:25 INFO blockmanagement.BlockManager: replicationRecheckInterval &＃61; 3000 37 18/03/03 11:13:25 INFO blockmanagement.BlockManager: encryptDataTransfer &＃61; false 38 18/03/03 11:13:25 INFO blockmanagement.BlockManager: maxNumBlocksToLog &＃61; 1000 39 18/03/03 11:13:25 INFO namenode.FSNamesystem: fsOwner &＃61; hadoop (auth:SIMPLE) 40 18/03/03 11:13:25 INFO namenode.FSNamesystem: supergroup &＃61; supergroup 41 18/03/03 11:13:25 INFO namenode.FSNamesystem: isPermissionEnabled &＃61; true 42 18/03/03 11:13:25 INFO namenode.FSNamesystem: HA Enabled: false 43 18/03/03 11:13:25 INFO namenode.FSNamesystem: Append Enabled: true 44 18/03/03 11:13:25 INFO util.GSet: Computing capacity for map INodeMap 45 18/03/03 11:13:25 INFO util.GSet: VM type &＃61; 64-bit 46 18/03/03 11:13:25 INFO util.GSet: 1.0% max memory 966.7 MB &＃61; 9.7 MB 47 18/03/03 11:13:25 INFO util.GSet: capacity &＃61; 2^20 &＃61; 1048576 entries 48 18/03/03 11:13:26 INFO namenode.FSDirectory: ACLs enabled? false 49 18/03/03 11:13:26 INFO namenode.FSDirectory: XAttrs enabled? true 50 18/03/03 11:13:26 INFO namenode.FSDirectory: Maximum size of an xattr: 16384 51 18/03/03 11:13:26 INFO namenode.NameNode: Caching file names occuring more than 10 times 52 18/03/03 11:13:26 INFO util.GSet: Computing capacity for map cachedBlocks 53 18/03/03 11:13:26 INFO util.GSet: VM type &＃61; 64-bit 54 18/03/03 11:13:26 INFO util.GSet: 0.25% max memory 966.7 MB &＃61; 2.4 MB 55 18/03/03 11:13:26 INFO util.GSet: capacity &＃61; 2^18 &＃61; 262144 entries 56 18/03/03 11:13:26 INFO namenode.FSNamesystem: dfs.namenode.safemode.threshold-pct &＃61; 0.9990000128746033 57 18/03/03 11:13:26 INFO namenode.FSNamesystem: dfs.namenode.safemode.min.datanodes &＃61; 0 58 18/03/03 11:13:26 INFO namenode.FSNamesystem: dfs.namenode.safemode.extension &＃61; 30000 59 18/03/03 11:13:26 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.window.num.buckets &＃61; 10 60 18/03/03 11:13:26 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.num.users &＃61; 10 61 18/03/03 11:13:26 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.windows.minutes &＃61; 1,5,25 62 18/03/03 11:13:26 INFO namenode.FSNamesystem: Retry cache on namenode is enabled 63 18/03/03 11:13:26 INFO namenode.FSNamesystem: Retry cache will use 0.03 of total heap and retry cache entry expiry time is 600000 millis 64 18/03/03 11:13:26 INFO util.GSet: Computing capacity for map NameNodeRetryCache 65 18/03/03 11:13:26 INFO util.GSet: VM type &＃61; 64-bit 66 18/03/03 11:13:26 INFO util.GSet: 0.029999999329447746% max memory 966.7 MB &＃61; 297.0 KB 67 18/03/03 11:13:26 INFO util.GSet: capacity &＃61; 2^15 &＃61; 32768 entries 68 18/03/03 11:13:26 INFO namenode.FSImage: Allocated new BlockPoolId: BP-269129172-192.168.123.102-1520046806111 69 18/03/03 11:13:26 INFO common.Storage: Storage directory /home/hadoop/data/hadoopdata/name has been successfully formatted. 70 18/03/03 11:13:26 INFO namenode.FSImageFormatProtobuf: Saving image file /home/hadoop/data/hadoopdata/name/current/fsimage.ckpt_0000000000000000000 using no compression 71 18/03/03 11:13:26 INFO namenode.FSImageFormatProtobuf: Image file /home/hadoop/data/hadoopdata/name/current/fsimage.ckpt_0000000000000000000 of size 323 bytes saved in 0 seconds. 72 18/03/03 11:13:26 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid >&＃61; 0 73 18/03/03 11:13:26 INFO util.ExitUtil: Exiting with status 0 74 18/03/03 11:13:26 INFO namenode.NameNode: SHUTDOWN_MSG: 75 /************************************************************ 76 SHUTDOWN_MSG: Shutting down NameNode at hadoop1/192.168.123.102 77 ************************************************************/ 78 [hadoop&＃64;hadoop1 ~]$

启动

启动HDFS

[hadoop&＃64;hadoop1 ~]$ start-dfs.sh Starting namenodes on [hadoop1] hadoop1: starting namenode, logging to /home/hadoop/apps/hadoop-2.7.5/logs/hadoop-hadoop-namenode-hadoop1.out hadoop3: starting datanode, logging to /home/hadoop/apps/hadoop-2.7.5/logs/hadoop-hadoop-datanode-hadoop3.out hadoop2: starting datanode, logging to /home/hadoop/apps/hadoop-2.7.5/logs/hadoop-hadoop-datanode-hadoop2.out hadoop4: starting datanode, logging to /home/hadoop/apps/hadoop-2.7.5/logs/hadoop-hadoop-datanode-hadoop4.out hadoop1: starting datanode, logging to /home/hadoop/apps/hadoop-2.7.5/logs/hadoop-hadoop-datanode-hadoop1.out Starting secondary namenodes [hadoop3] hadoop3: starting secondarynamenode, logging to /home/hadoop/apps/hadoop-2.7.5/logs/hadoop-hadoop-secondarynamenode-hadoop3.out [hadoop&＃64;hadoop1 ~]$

启动YARN

[hadoop&＃64;hadoop4 ~]$ start-yarn.sh starting yarn daemons starting resourcemanager, logging to /home/hadoop/apps/hadoop-2.7.5/logs/yarn-hadoop-resourcemanager-hadoop4.out hadoop2: starting nodemanager, logging to /home/hadoop/apps/hadoop-2.7.5/logs/yarn-hadoop-nodemanager-hadoop2.out hadoop3: starting nodemanager, logging to /home/hadoop/apps/hadoop-2.7.5/logs/yarn-hadoop-nodemanager-hadoop3.out hadoop4: starting nodemanager, logging to /home/hadoop/apps/hadoop-2.7.5/logs/yarn-hadoop-nodemanager-hadoop4.out hadoop1: starting nodemanager, logging to /home/hadoop/apps/hadoop-2.7.5/logs/yarn-hadoop-nodemanager-hadoop1.out [hadoop&＃64;hadoop4 ~]$

查看服务器进程

Hadoop1

Hadoop2

Hadoop3

Hadoop4

启动web界面

HDFS 界面

单击DataNodes 可以看到另外四个节点

Yarn 界面

简单使用

创建文件夹

在HDFS上创建一个文件夹/test/input

[hadoop&＃64;hadoop1 ~]$ hadoop fs -mkdir -p /test/input

查看创建的文件夹

[hadoop&＃64;hadoop1 ~]$ hadoop fs -ls / Found 1 items drwxr-xr-x - hadoop supergroup 0 2018-03-03 11:33 /test [hadoop&＃64;hadoop1 ~]$ hadoop fs -ls /test Found 1 items drwxr-xr-x - hadoop supergroup 0 2018-03-03 11:33 /test/input [hadoop&＃64;hadoop1 ~]$

上传文件

创建一个文件为words.txt

[hadoop&＃64;hadoop1 ~]$ vi words.txt

上传文件

[hadoop&＃64;hadoop1 ~]$ hadoop fs -put ~/words.txt /test/input

查看是否上传成功

[hadoop&＃64;hadoop1 ~]$ hadoop fs -ls /test/input Found 1 items -rw-r--r-- 2 hadoop supergroup 39 2018-03-03 11:37 /test/input/words.txt [hadoop&＃64;hadoop1 ~]$

下载文件

把刚刚上传的文件下载到/data文件夹中

[hadoop&＃64;hadoop1 ~]$ hadoop fs -get /test/input/words.txt ~/data

查看是否下载成功

[hadoop&＃64;hadoop1 ~]$ ls data hadoopdata words.txt [hadoop&＃64;hadoop1 ~]$

运行一个mapreduce的例子程序&＃xff1a;wordcount

[hadoop&＃64;hadoop1 ~]$ hadoop jar ~/apps/hadoop-2.7.5/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.5.jar wordcount /test/input /test/output

在yarn web 界面查看查看相关结果

[hadoop&＃64;hadoop1 ~]$ hadoop fs -ls /test/output Found 2 items -rw-r--r-- 2 hadoop supergroup 0 2018-03-03 11:42 /test/output/_SUCCESS -rw-r--r-- 2 hadoop supergroup 35 2018-03-03 11:42 /test/output/part-r-00000 [hadoop&＃64;hadoop1 ~]$ hadoop fs -cat /test/output/part-r-00000 hello 3 lisi 1 wangwu 1 zhangsan 1 [hadoop&＃64;hadoop1 ~]$

结语

我是小小&＃xff0c;本篇已经结束&＃xff0c;我们下期再见。你若不在&＃xff0c;我一直在&＃xff0c;你若在&＃xff0c;我将会一直在&＃xff0c;我将会永远的等你&＃xff0c;我还是那个小小。

-- 小小做于 2020 年 09 月 20 日

小明菜市场