本文记录一下在CentOS 6.7上，安装Hadoop-2.7.3版本的过程。
安装Hadoop主要包含如下几个部分：
- 安装JDK
- 安装Hadoop
- 配置Hadoop
- 启动Hadoop
- 验证Hadoop
安装JDK
安装JDK可以参考如下博文，这里就不再重复描述。
CentOS上安裝JDK （rpm的方式）
安装Hadoop
- 创建hadoop账户
[root@dev03 srv]# useradd hadoop [root@dev03 srv]# passwd hadoop Changing password for user hadoop. New password: BAD PASSWORD: it is based on a dictionary word BAD PASSWORD: is too simple Retype new password: passwd: all authentication tokens updated successfully. [root@dev03 srv]#
为hadoop用户配置SSHKEY。
[root@dev03 srv]# su - hadoop [hadoop@dev03 ~]$
ssh-keygen -t rsa
cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 0600 ~/.ssh/authorized_keys
[hadoop@dev03 ~]$ ssh-keygen -t rsa Generating public/private rsa key pair. Enter file in which to save the key (/home/hadoop/.ssh/id_rsa): Created directory '/home/hadoop/.ssh'. Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/hadoop/.ssh/id_rsa. Your public key has been saved in /home/hadoop/.ssh/id_rsa.pub. The key fingerprint is: 23:27:78:a5:73:a6:3f:b0:1a:b6:87:00:d4:9e:26:67 hadoop@dev03.gzhl.interconnect The key's randomart image is: +--[ RSA 2048]----+ | . | | . . | |. . . . | |.. E . o | | .= . * S | | . ..O . | | .o..o | | ..oo.. | | oo .. | +-----------------+ [hadoop@dev03 ~]$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys [hadoop@dev03 ~]$ chmod 0600 ~/.ssh/authorized_keys [hadoop@dev03 ~]$ exit logout [root@dev03 srv]#
- 下载Hadoop安装包
使用wget 命令下载hadoop-2.7.3.tar.gz， 如:
[root@dev03 srv]# wget http://mirrors.tuna.tsinghua.edu.cn/apache/hadoop/common/hadoop-2.7.3/hadoop-2.7.3.tar.gz --2017-01-24 13:54:44-- http://mirrors.tuna.tsinghua.edu.cn/apache/hadoop/common/hadoop-2.7.3/hadoop-2.7.3.tar.gz Resolving mirrors.tuna.tsinghua.edu.cn... 166.111.206.178,2402:f000:1:416:166:111:206:178 Connecting to mirrors.tuna.tsinghua.edu.cn|166.111.206.178|:80... connected. HTTP request sent,awaiting response... 200 OK Length: 214092195 (204M) [application/octet-stream] Saving to: “hadoop-2.7.3.tar.gz” 100%[====================================================================================================================================================================================================================================>] 214,092,195 22.0M/s in 9.6s 2017-01-24 13:54:53 (21.2 MB/s) - “hadoop-2.7.3.tar.gz” saved [214092195/214092195] [root@dev03 srv]#
- 解压hadoop-2.7.3.tar.gz
使用tar -zvxf hadoop-2.7.3.tar.gz解压，并修改解压后的hadoop目录名。
[root@dev03 srv]# tar -zvxf hadoop-2.7.3.tar.gz ... ... hadoop-2.7.3/share/hadoop/tools/lib/asm-3.2.jar hadoop-2.7.3/include/ hadoop-2.7.3/include/hdfs.h hadoop-2.7.3/include/Pipes.hh hadoop-2.7.3/include/TemplateFactory.hh hadoop-2.7.3/include/StringUtils.hh hadoop-2.7.3/include/SerialUtils.hh hadoop-2.7.3/LICENSE.txt hadoop-2.7.3/NOTICE.txt hadoop-2.7.3/README.txt [root@dev03 srv]# mv hadoop-2.7.3 hadoop [root@dev03 srv]#
进入hadoop目录，可以看到有如下内容：
[root@dev03 srv]# cd hadoop [root@dev03 hadoop-2.7.3]# ll total 132 drwxr-xr-x 2 root root 4096 Aug 18 09:49 bin drwxr-xr-x 3 root root 4096 Aug 18 09:49 etc drwxr-xr-x 2 root root 4096 Aug 18 09:49 include drwxr-xr-x 3 root root 4096 Aug 18 09:49 lib drwxr-xr-x 2 root root 4096 Aug 18 09:49 libexec -rw-r--r-- 1 root root 84854 Aug 18 09:49 LICENSE.txt -rw-r--r-- 1 root root 14978 Aug 18 09:49 NOTICE.txt -rw-r--r-- 1 root root 1366 Aug 18 09:49 README.txt drwxr-xr-x 2 root root 4096 Aug 18 09:49 sbin drwxr-xr-x 4 root root 4096 Aug 18 09:49 share [root@dev03 hadoop-2.7.3]#
配置Hadoop环境变量
解压完hadoop之后，需要配置hadoop相关的环境变量，如HADOOP_HOME。
- 设置环境变量
使用vim /etc/profile打开环境配置文件，在最后添加如下内容，其中JAVA_HOME和HADOOP_HOME的路径由对应的安装目录决定。
export JAVA_HOME=/usr/java/jdk1.7.0_71 export PATH=PATH=$PATH:$JAVA_HOME/bin export HADOOP_HOME=/srv/hadoop export HADOOP_INSTALL=$HADOOP_HOME export HADOOP_MAPRED_HOME=$HADOOP_HOME export HADOOP_COMMON_HOME=$HADOOP_HOME export HADOOP_HDFS_HOME=$HADOOP_HOME export HADOOP_YARN_HOME=$HADOOP_HOME export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native export PATH=$PATH:$HADOOP_HOME/sbin:$HADOOP_HOME/bin
使用source /etc/profile命令，使新添加的环境变量生效。
[root@dev03 srv]# vim /etc/profile [root@dev03 srv]# source /etc/profile [root@dev03 srv]#
配置好相关的环境变量后，进入到<HADOOP_HOME>/etc/hadoop目录下，修改相关配置文件的信息。<HADOOP_HOME>/etc/hadoop目录下的配置文件如下：
[root@dev03 hadoop]# cd etc/hadoop/ [root@dev03 hadoop]# ll total 152 -rw-r--r-- 1 root root 4436 Aug 18 09:49 capacity-scheduler.xml -rw-r--r-- 1 root root 1335 Aug 18 09:49 configuration.xsl -rw-r--r-- 1 root root 318 Aug 18 09:49 container-executor.cfg -rw-r--r-- 1 root root 774 Aug 18 09:49 core-site.xml -rw-r--r-- 1 root root 3589 Aug 18 09:49 hadoop-env.cmd -rw-r--r-- 1 root root 4224 Aug 18 09:49 hadoop-env.sh -rw-r--r-- 1 root root 2598 Aug 18 09:49 hadoop-metrics2.properties -rw-r--r-- 1 root root 2490 Aug 18 09:49 hadoop-metrics.properties -rw-r--r-- 1 root root 9683 Aug 18 09:49 hadoop-policy.xml -rw-r--r-- 1 root root 775 Aug 18 09:49 hdfs-site.xml -rw-r--r-- 1 root root 1449 Aug 18 09:49 httpfs-env.sh -rw-r--r-- 1 root root 1657 Aug 18 09:49 httpfs-log4j.properties -rw-r--r-- 1 root root 21 Aug 18 09:49 httpfs-signature.secret -rw-r--r-- 1 root root 620 Aug 18 09:49 httpfs-site.xml -rw-r--r-- 1 root root 3518 Aug 18 09:49 kms-acls.xml -rw-r--r-- 1 root root 1527 Aug 18 09:49 kms-env.sh -rw-r--r-- 1 root root 1631 Aug 18 09:49 kms-log4j.properties -rw-r--r-- 1 root root 5511 Aug 18 09:49 kms-site.xml -rw-r--r-- 1 root root 11237 Aug 18 09:49 log4j.properties -rw-r--r-- 1 root root 931 Aug 18 09:49 mapred-env.cmd -rw-r--r-- 1 root root 1383 Aug 18 09:49 mapred-env.sh -rw-r--r-- 1 root root 4113 Aug 18 09:49 mapred-queues.xml.template -rw-r--r-- 1 root root 758 Aug 18 09:49 mapred-site.xml.template -rw-r--r-- 1 root root 10 Aug 18 09:49 slaves -rw-r--r-- 1 root root 2316 Aug 18 09:49 ssl-client.xml.example -rw-r--r-- 1 root root 2268 Aug 18 09:49 ssl-server.xml.example -rw-r--r-- 1 root root 2191 Aug 18 09:49 yarn-env.cmd -rw-r--r-- 1 root root 4567 Aug 18 09:49 yarn-env.sh -rw-r--r-- 1 root root 690 Aug 18 09:49 yarn-site.xml [root@dev03 hadoop]#
- 修改core-site.xml
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://localhost:9000</value>
</property>
</configuration>
如：
- 修改hdfs-site.xml
修改hdfs-site.xml内容之前，先创建namenode和datanode的文件夹，如
<HADOOP_HOME>/hadoopdata/hdfs/namenode
<HADOOP_HOME>/hadoopdata/hdfs/datanode
[root@dev03 hadoop]# mkdir hadoopdata [root@dev03 hadoop]# cd hadoopdata/ [root@dev03 hadoopdata]# mkdir hdfs [root@dev03 hadoopdata]# cd hdfs [root@dev03 hdfs]# mkdir namenode [root@dev03 hdfs]# mkdir datanode [root@dev03 hdfs]# ll total 8 drwxr-xr-x 2 root root 4096 Jan 24 14:42 datanode drwxr-xr-x 2 root root 4096 Jan 24 14:42 namenode [root@dev03 hdfs]#
修改hdfs-site.xml， 如：
<!-- Put site-specific property overrides in this file. -->
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.name.dir</name>
<value>file:///srv/hadoop/hadoopdata/hdfs/namenode</value>
</property>
<property>
<name>dfs.data.dir</name>
<value>file:///srv/hadoop/hadoopdata/hdfs/datanode</value>
</property>
</configuration>
- 修改yarn-site.xml
<configuration>
<!-- Site specific YARN configuration properties -->
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
</configuration>
- 修改hadoop-env.sh
修改hadoop-env.sh中的JAVA_HOME， 与安装的路径匹配，如：
#export JAVA_HOME=${JAVA_HOME}
export JAVA_HOME=/usr/java/jdk1.7.0_71
- 格式化namenode
可以使用hdfs namenode -format命令格式化namenode。
[root@dev03 hadoop]# hdfs namenode -format 17/01/24 14:52:03 INFO namenode.NameNode: STARTUP_MSG: /************************************************************ STARTUP_MSG: Starting NameNode STARTUP_MSG: host = dev03.gzhl.interconnect/127.0.0.1 STARTUP_MSG: args = [-format] STARTUP_MSG: version = 2.7.3 STARTUP_MSG: classpath = /srv/hadoop/etc/hadoop:/srv/hadoop/share/hadoop/common/lib/httpcore-4.2.5.jar:/srv/hadoop/share/hadoop/common/lib/commons-httpclient-3.1.jar:/srv/hadoop/share/hadoop/common/lib/curator-recipes-2.7.1.jar:/srv/hadoop/share/hadoop/common/lib/commons-compress-1.4.1.jar:/srv/hadoop/share/hadoop/common/lib/jaxb-api-2.2.2.jar:/srv/hadoop/share/hadoop/common/lib/hamcrest-core-1.3.jar:/srv/hadoop/share/hadoop/common/lib/jackson-core-asl-1.9.13.jar:/srv/hadoop/share/hadoop/common/lib/commons-configuration-1.6.jar:/srv/hadoop/share/hadoop/common/lib/jetty-util-6.1.26.jar:/srv/hadoop/share/hadoop/common/lib/commons-lang-2.6.jar:/srv/hadoop/share/hadoop/common/lib/jettison-1.1.jar:/srv/hadoop/share/hadoop/common/lib/commons-cli-1.2.jar:/srv/hadoop/share/hadoop/common/lib/log4j-1.2.17.jar:/srv/hadoop/share/hadoop/common/lib/curator-client-2.7.1.jar:/srv/hadoop/share/hadoop/common/lib/commons-logging-1.1.3.jar:/srv/hadoop/share/hadoop/common/lib/stax-api-1.0-2.jar:/srv/hadoop/share/hadoop/common/lib/jersey-server-1.9.jar:/srv/hadoop/share/hadoop/common/lib/api-asn1-api-1.0.0-M20.jar:/srv/hadoop/share/hadoop/common/lib/commons-beanutils-core-1.8.0.jar:/srv/hadoop/share/hadoop/common/lib/activation-1.1.jar:/srv/hadoop/share/hadoop/common/lib/jackson-jaxrs-1.9.13.jar:/srv/hadoop/share/hadoop/common/lib/htrace-core-3.1.0-incubating.jar:/srv/hadoop/share/hadoop/common/lib/commons-codec-1.4.jar:/srv/hadoop/share/hadoop/common/lib/paranamer-2.3.jar:/srv/hadoop/share/hadoop/common/lib/asm-3.2.jar:/srv/hadoop/share/hadoop/common/lib/commons-beanutils-1.7.0.jar:/srv/hadoop/share/hadoop/common/lib/jersey-core-1.9.jar:/srv/hadoop/share/hadoop/common/lib/commons-collections-3.2.2.jar:/srv/hadoop/share/hadoop/common/lib/httpclient-4.2.5.jar:/srv/hadoop/share/hadoop/common/lib/zookeeper-3.4.6.jar:/srv/hadoop/share/hadoop/common/lib/junit-4.11.jar:/srv/hadoop/share/hadoop/common/lib/mockito-all-1.8.5.jar:/srv/hadoop/share/hadoop/common/lib/servlet-api-2.5.jar:/srv/hadoop/share/hadoop/common/lib/xz-1.0.jar:/srv/hadoop/share/hadoop/common/lib/jaxb-impl-2.2.3-1.jar:/srv/hadoop/share/hadoop/common/lib/java-xmlbuilder-0.4.jar:/srv/hadoop/share/hadoop/common/lib/jetty-6.1.26.jar:/srv/hadoop/share/hadoop/common/lib/slf4j-api-1.7.10.jar:/srv/hadoop/share/hadoop/common/lib/jets3t-0.9.0.jar:/srv/hadoop/share/hadoop/common/lib/hadoop-annotations-2.7.3.jar:/srv/hadoop/share/hadoop/common/lib/gson-2.2.4.jar:/srv/hadoop/share/hadoop/common/lib/slf4j-log4j12-1.7.10.jar:/srv/hadoop/share/hadoop/common/lib/commons-net-3.1.jar:/srv/hadoop/share/hadoop/common/lib/api-util-1.0.0-M20.jar:/srv/hadoop/share/hadoop/common/lib/jsr305-3.0.0.jar:/srv/hadoop/share/hadoop/common/lib/commons-digester-1.8.jar:/srv/hadoop/share/hadoop/common/lib/jersey-json-1.9.jar:/srv/hadoop/share/hadoop/common/lib/curator-framework-2.7.1.jar:/srv/hadoop/share/hadoop/common/lib/guava-11.0.2.jar:/srv/hadoop/share/hadoop/common/lib/avro-1.7.4.jar:/srv/hadoop/share/hadoop/common/lib/protobuf-java-2.5.0.jar:/srv/hadoop/share/hadoop/common/lib/apacheds-i18n-2.0.0-M15.jar:/srv/hadoop/share/hadoop/common/lib/jsch-0.1.42.jar:/srv/hadoop/share/hadoop/common/lib/jackson-mapper-asl-1.9.13.jar:/srv/hadoop/share/hadoop/common/lib/snappy-java-1.0.4.1.jar:/srv/hadoop/share/hadoop/common/lib/commons-io-2.4.jar:/srv/hadoop/share/hadoop/common/lib/xmlenc-0.52.jar:/srv/hadoop/share/hadoop/common/lib/jsp-api-2.1.jar:/srv/hadoop/share/hadoop/common/lib/jackson-xc-1.9.13.jar:/srv/hadoop/share/hadoop/common/lib/hadoop-auth-2.7.3.jar:/srv/hadoop/share/hadoop/common/lib/netty-3.6.2.Final.jar:/srv/hadoop/share/hadoop/common/lib/apacheds-kerberos-codec-2.0.0-M15.jar:/srv/hadoop/share/hadoop/common/lib/commons-math3-3.1.1.jar:/srv/hadoop/share/hadoop/common/hadoop-common-2.7.3-tests.jar:/srv/hadoop/share/hadoop/common/hadoop-nfs-2.7.3.jar:/srv/hadoop/share/hadoop/common/hadoop-common-2.7.3.jar:/srv/hadoop/share/hadoop/hdfs:/srv/hadoop/share/hadoop/hdfs/lib/jackson-core-asl-1.9.13.jar:/srv/hadoop/share/hadoop/hdfs/lib/jetty-util-6.1.26.jar:/srv/hadoop/share/hadoop/hdfs/lib/commons-lang-2.6.jar:/srv/hadoop/share/hadoop/hdfs/lib/commons-cli-1.2.jar:/srv/hadoop/share/hadoop/hdfs/lib/xercesImpl-2.9.1.jar:/srv/hadoop/share/hadoop/hdfs/lib/log4j-1.2.17.jar:/srv/hadoop/share/hadoop/hdfs/lib/commons-logging-1.1.3.jar:/srv/hadoop/share/hadoop/hdfs/lib/jersey-server-1.9.jar:/srv/hadoop/share/hadoop/hdfs/lib/leveldbjni-all-1.8.jar:/srv/hadoop/share/hadoop/hdfs/lib/htrace-core-3.1.0-incubating.jar:/srv/hadoop/share/hadoop/hdfs/lib/commons-codec-1.4.jar:/srv/hadoop/share/hadoop/hdfs/lib/asm-3.2.jar:/srv/hadoop/share/hadoop/hdfs/lib/jersey-core-1.9.jar:/srv/hadoop/share/hadoop/hdfs/lib/servlet-api-2.5.jar:/srv/hadoop/share/hadoop/hdfs/lib/jetty-6.1.26.jar:/srv/hadoop/share/hadoop/hdfs/lib/commons-daemon-1.0.13.jar:/srv/hadoop/share/hadoop/hdfs/lib/jsr305-3.0.0.jar:/srv/hadoop/share/hadoop/hdfs/lib/netty-all-4.0.23.Final.jar:/srv/hadoop/share/hadoop/hdfs/lib/guava-11.0.2.jar:/srv/hadoop/share/hadoop/hdfs/lib/protobuf-java-2.5.0.jar:/srv/hadoop/share/hadoop/hdfs/lib/jackson-mapper-asl-1.9.13.jar:/srv/hadoop/share/hadoop/hdfs/lib/commons-io-2.4.jar:/srv/hadoop/share/hadoop/hdfs/lib/xmlenc-0.52.jar:/srv/hadoop/share/hadoop/hdfs/lib/netty-3.6.2.Final.jar:/srv/hadoop/share/hadoop/hdfs/lib/xml-apis-1.3.04.jar:/srv/hadoop/share/hadoop/hdfs/hadoop-hdfs-2.7.3.jar:/srv/hadoop/share/hadoop/hdfs/hadoop-hdfs-2.7.3-tests.jar:/srv/hadoop/share/hadoop/hdfs/hadoop-hdfs-nfs-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/lib/commons-compress-1.4.1.jar:/srv/hadoop/share/hadoop/yarn/lib/guice-3.0.jar:/srv/hadoop/share/hadoop/yarn/lib/jaxb-api-2.2.2.jar:/srv/hadoop/share/hadoop/yarn/lib/jackson-core-asl-1.9.13.jar:/srv/hadoop/share/hadoop/yarn/lib/javax.inject-1.jar:/srv/hadoop/share/hadoop/yarn/lib/jetty-util-6.1.26.jar:/srv/hadoop/share/hadoop/yarn/lib/commons-lang-2.6.jar:/srv/hadoop/share/hadoop/yarn/lib/jettison-1.1.jar:/srv/hadoop/share/hadoop/yarn/lib/commons-cli-1.2.jar:/srv/hadoop/share/hadoop/yarn/lib/log4j-1.2.17.jar:/srv/hadoop/share/hadoop/yarn/lib/commons-logging-1.1.3.jar:/srv/hadoop/share/hadoop/yarn/lib/stax-api-1.0-2.jar:/srv/hadoop/share/hadoop/yarn/lib/jersey-server-1.9.jar:/srv/hadoop/share/hadoop/yarn/lib/activation-1.1.jar:/srv/hadoop/share/hadoop/yarn/lib/jackson-jaxrs-1.9.13.jar:/srv/hadoop/share/hadoop/yarn/lib/leveldbjni-all-1.8.jar:/srv/hadoop/share/hadoop/yarn/lib/zookeeper-3.4.6-tests.jar:/srv/hadoop/share/hadoop/yarn/lib/commons-codec-1.4.jar:/srv/hadoop/share/hadoop/yarn/lib/asm-3.2.jar:/srv/hadoop/share/hadoop/yarn/lib/jersey-core-1.9.jar:/srv/hadoop/share/hadoop/yarn/lib/commons-collections-3.2.2.jar:/srv/hadoop/share/hadoop/yarn/lib/jersey-client-1.9.jar:/srv/hadoop/share/hadoop/yarn/lib/zookeeper-3.4.6.jar:/srv/hadoop/share/hadoop/yarn/lib/servlet-api-2.5.jar:/srv/hadoop/share/hadoop/yarn/lib/xz-1.0.jar:/srv/hadoop/share/hadoop/yarn/lib/jaxb-impl-2.2.3-1.jar:/srv/hadoop/share/hadoop/yarn/lib/jetty-6.1.26.jar:/srv/hadoop/share/hadoop/yarn/lib/guice-servlet-3.0.jar:/srv/hadoop/share/hadoop/yarn/lib/jsr305-3.0.0.jar:/srv/hadoop/share/hadoop/yarn/lib/jersey-json-1.9.jar:/srv/hadoop/share/hadoop/yarn/lib/jersey-guice-1.9.jar:/srv/hadoop/share/hadoop/yarn/lib/guava-11.0.2.jar:/srv/hadoop/share/hadoop/yarn/lib/protobuf-java-2.5.0.jar:/srv/hadoop/share/hadoop/yarn/lib/jackson-mapper-asl-1.9.13.jar:/srv/hadoop/share/hadoop/yarn/lib/commons-io-2.4.jar:/srv/hadoop/share/hadoop/yarn/lib/jackson-xc-1.9.13.jar:/srv/hadoop/share/hadoop/yarn/lib/netty-3.6.2.Final.jar:/srv/hadoop/share/hadoop/yarn/lib/aopalliance-1.0.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-applications-unmanaged-am-launcher-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-applications-distributedshell-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-api-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-server-web-proxy-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-server-tests-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-registry-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-server-common-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-server-resourcemanager-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-client-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-server-sharedcachemanager-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-server-applicationhistoryservice-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-common-2.7.3.jar:/srv/hadoop/share/hadoop/yarn/hadoop-yarn-server-nodemanager-2.7.3.jar:/srv/hadoop/share/hadoop/mapreduce/lib/commons-compress-1.4.1.jar:/srv/hadoop/share/hadoop/mapreduce/lib/guice-3.0.jar:/srv/hadoop/share/hadoop/mapreduce/lib/hamcrest-core-1.3.jar:/srv/hadoop/share/hadoop/mapreduce/lib/jackson-core-asl-1.9.13.jar:/srv/hadoop/share/hadoop/mapreduce/lib/javax.inject-1.jar:/srv/hadoop/share/hadoop/mapreduce/lib/log4j-1.2.17.jar:/srv/hadoop/share/hadoop/mapreduce/lib/jersey-server-1.9.jar:/srv/hadoop/share/hadoop/mapreduce/lib/leveldbjni-all-1.8.jar:/srv/hadoop/share/hadoop/mapreduce/lib/paranamer-2.3.jar:/srv/hadoop/share/hadoop/mapreduce/lib/asm-3.2.jar:/srv/hadoop/share/hadoop/mapreduce/lib/jersey-core-1.9.jar:/srv/hadoop/share/hadoop/mapreduce/lib/junit-4.11.jar:/srv/hadoop/share/hadoop/mapreduce/lib/xz-1.0.jar:/srv/hadoop/share/hadoop/mapreduce/lib/guice-servlet-3.0.jar:/srv/hadoop/share/hadoop/mapreduce/lib/hadoop-annotations-2.7.3.jar:/srv/hadoop/share/hadoop/mapreduce/lib/jersey-guice-1.9.jar:/srv/hadoop/share/hadoop/mapreduce/lib/avro-1.7.4.jar:/srv/hadoop/share/hadoop/mapreduce/lib/protobuf-java-2.5.0.jar:/srv/hadoop/share/hadoop/mapreduce/lib/jackson-mapper-asl-1.9.13.jar:/srv/hadoop/share/hadoop/mapreduce/lib/snappy-java-1.0.4.1.jar:/srv/hadoop/share/hadoop/mapreduce/lib/commons-io-2.4.jar:/srv/hadoop/share/hadoop/mapreduce/lib/netty-3.6.2.Final.jar:/srv/hadoop/share/hadoop/mapreduce/lib/aopalliance-1.0.jar:/srv/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.7.3.jar:/srv/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-common-2.7.3.jar:/srv/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-shuffle-2.7.3.jar:/srv/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.7.3-tests.jar:/srv/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-jobclient-2.7.3.jar:/srv/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-plugins-2.7.3.jar:/srv/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-app-2.7.3.jar:/srv/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-examples-2.7.3.jar:/srv/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-hs-2.7.3.jar:/srv/hadoop/contrib/capacity-scheduler/*.jar STARTUP_MSG: build = https://git-wip-us.apache.org/repos/asf/hadoop.git -r baa91f7c6bc9cb92be5982de4719c1c8af91ccff; compiled by 'root' on 2016-08-18T01:41Z STARTUP_MSG: java = 1.7.0_71 ************************************************************/ 17/01/24 14:52:03 INFO namenode.NameNode: registered UNIX signal handlers for [TERM,HUP,INT] 17/01/24 14:52:03 INFO namenode.NameNode: createNameNode [-format] 17/01/24 14:52:04 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Formatting using clusterid: CID-7f4c2bda-3f6d-4674-a2ec-ae8bee639a00 17/01/24 14:52:05 INFO namenode.FSNamesystem: No KeyProvider found. 17/01/24 14:52:05 INFO namenode.FSNamesystem: fsLock is fair:true 17/01/24 14:52:05 INFO blockmanagement.DatanodeManager: dfs.block.invalidate.limit=1000 17/01/24 14:52:05 INFO blockmanagement.DatanodeManager: dfs.namenode.datanode.registration.ip-hostname-check=true 17/01/24 14:52:05 INFO blockmanagement.BlockManager: dfs.namenode.startup.delay.block.deletion.sec is set to 000:00:00:00.000 17/01/24 14:52:05 INFO blockmanagement.BlockManager: The block deletion will start around 2017 Jan 24 14:52:05 17/01/24 14:52:05 INFO util.GSet: Computing capacity for map BlocksMap 17/01/24 14:52:05 INFO util.GSet: VM type = 64-bit 17/01/24 14:52:05 INFO util.GSet: 2.0% max memory 889 MB = 17.8 MB 17/01/24 14:52:05 INFO util.GSet: capacity = 2^21 = 2097152 entries 17/01/24 14:52:05 INFO blockmanagement.BlockManager: dfs.block.access.token.enable=false 17/01/24 14:52:05 INFO blockmanagement.BlockManager: defaultReplication = 1 17/01/24 14:52:05 INFO blockmanagement.BlockManager: maxReplication = 512 17/01/24 14:52:05 INFO blockmanagement.BlockManager: minReplication = 1 17/01/24 14:52:05 INFO blockmanagement.BlockManager: maxReplicationStreams = 2 17/01/24 14:52:05 INFO blockmanagement.BlockManager: replicationRecheckInterval = 3000 17/01/24 14:52:05 INFO blockmanagement.BlockManager: encryptDataTransfer = false 17/01/24 14:52:05 INFO blockmanagement.BlockManager: maxnumBlocksToLog = 1000 17/01/24 14:52:05 INFO namenode.FSNamesystem: fsOwner = root (auth:SIMPLE) 17/01/24 14:52:05 INFO namenode.FSNamesystem: supergroup = supergroup 17/01/24 14:52:05 INFO namenode.FSNamesystem: isPermissionEnabled = true 17/01/24 14:52:05 INFO namenode.FSNamesystem: HA Enabled: false 17/01/24 14:52:05 INFO namenode.FSNamesystem: Append Enabled: true 17/01/24 14:52:06 INFO util.GSet: Computing capacity for map INodeMap 17/01/24 14:52:06 INFO util.GSet: VM type = 64-bit 17/01/24 14:52:06 INFO util.GSet: 1.0% max memory 889 MB = 8.9 MB 17/01/24 14:52:06 INFO util.GSet: capacity = 2^20 = 1048576 entries 17/01/24 14:52:06 INFO namenode.FSDirectory: ACLs enabled? false 17/01/24 14:52:06 INFO namenode.FSDirectory: XAttrs enabled? true 17/01/24 14:52:06 INFO namenode.FSDirectory: Maximum size of an xattr: 16384 17/01/24 14:52:06 INFO namenode.NameNode: Caching file names occuring more than 10 times 17/01/24 14:52:06 INFO util.GSet: Computing capacity for map cachedBlocks 17/01/24 14:52:06 INFO util.GSet: VM type = 64-bit 17/01/24 14:52:06 INFO util.GSet: 0.25% max memory 889 MB = 2.2 MB 17/01/24 14:52:06 INFO util.GSet: capacity = 2^18 = 262144 entries 17/01/24 14:52:06 INFO namenode.FSNamesystem: dfs.namenode.safemode.threshold-pct = 0.9990000128746033 17/01/24 14:52:06 INFO namenode.FSNamesystem: dfs.namenode.safemode.min.datanodes = 0 17/01/24 14:52:06 INFO namenode.FSNamesystem: dfs.namenode.safemode.extension = 30000 17/01/24 14:52:06 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.window.num.buckets = 10 17/01/24 14:52:06 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.num.users = 10 17/01/24 14:52:06 INFO metrics.TopMetrics: NNTop conf: dfs.namenode.top.windows.minutes = 1,5,25 17/01/24 14:52:06 INFO namenode.FSNamesystem: Retry cache on namenode is enabled 17/01/24 14:52:06 INFO namenode.FSNamesystem: Retry cache will use 0.03 of total heap and retry cache entry expiry time is 600000 millis 17/01/24 14:52:06 INFO util.GSet: Computing capacity for map NameNodeRetryCache 17/01/24 14:52:06 INFO util.GSet: VM type = 64-bit 17/01/24 14:52:06 INFO util.GSet: 0.029999999329447746% max memory 889 MB = 273.1 KB 17/01/24 14:52:06 INFO util.GSet: capacity = 2^15 = 32768 entries 17/01/24 14:52:06 INFO namenode.FSImage: Allocated new BlockPoolId: BP-253312726-127.0.0.1-1485240726615 17/01/24 14:52:06 INFO common.Storage: Storage directory /srv/hadoop/hadoopdata/hdfs/namenode has been successfully formatted. 17/01/24 14:52:06 INFO namenode.FSImageFormatProtobuf: Saving image file /srv/hadoop/hadoopdata/hdfs/namenode/current/fsimage.ckpt_0000000000000000000 using no compression 17/01/24 14:52:07 INFO namenode.FSImageFormatProtobuf: Image file /srv/hadoop/hadoopdata/hdfs/namenode/current/fsimage.ckpt_0000000000000000000 of size 351 bytes saved in 0 seconds. 17/01/24 14:52:07 INFO namenode.NNStorageRetentionManager: Going to retain 1 images with txid >= 0 17/01/24 14:52:07 INFO util.ExitUtil: Exiting with status 0 17/01/24 14:52:07 INFO namenode.NameNode: SHUTDOWN_MSG: /************************************************************ SHUTDOWN_MSG: Shutting down NameNode at dev03.gzhl.interconnect/127.0.0.1 ************************************************************/ [root@dev03 hadoop]#
启动hadoop
配置好hadoop的环境变量和文件之后，就可以启动hadoop。
使用start-dfs.sh和start-yarn.sh命令启动。
- start-dfs.sh
[root@dev03 sbin]# start-dfs.sh 17/01/24 15:20:40 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable Starting namenodes on [localhost] root@localhost's password: localhost: starting namenode,logging to /srv/hadoop/logs/hadoop-root-namenode-dev03.gzhl.interconnect.out root@localhost's password: localhost: starting datanode,logging to /srv/hadoop/logs/hadoop-root-datanode-dev03.gzhl.interconnect.out Starting secondary namenodes [0.0.0.0] root@0.0.0.0's password: 0.0.0.0: starting secondarynamenode,logging to /srv/hadoop/logs/hadoop-root-secondarynamenode-dev03.gzhl.interconnect.out 17/01/24 15:22:34 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable [root@dev03 sbin]#
使用start-dfs.sh命令启动时，需要输入root@localhost的密码。
- start-yarn.sh
[root@dev03 sbin]# start-yarn.sh starting yarn daemons resourcemanager running as process 13318. Stop it first. root@localhost's password: localhost: nodemanager running as process 13588. Stop it first. [root@dev03 sbin]#
同样，使用start-yarn.sh命令启动时，需要输入root@localhost的密码。
验证Hadoop
启动后，咱们就可以来验证一下hadoop是否已经启动成功。
使用jps来查看所有启动的服务，从下图可以看出NameNode、NodeManager、SecondaryNameNode等都已经启动。
[root@dev03 sbin]# jps 13823 NameNode 13588 NodeManager 21983 Bootstrap 13941 Datanode 13318 ResourceManager 14097 SecondaryNameNode 14349 Jps [root@dev03 sbin]#
可以通过http://<安装Hadoop的IP>:50070/在浏览器查看Hadoop信息。
可以通过http://<安装Hadoop的IP>:8088/在浏览器查看所有的应用信息。
至此，可以看出Hadoop基本安装成功。