大数据之---伪分布式部署之终极篇-创新互联

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RHEL6.8 hadoop2.8.1 apache-maven-3.3.9

findbugs-1.3.9 protobuf-2.5.0.tar.gz jdk-8u45

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1.Hadoop
宏观: Hadoop为主的生态圈 hadoop flume........
狭义: apache hadoop hadoop.apache.org

2.Hadoop(存储+计算+资源和作业调度)
hadoop1.x
   HDFS     存储
   MapReduce 计算+资源和作业调度

hadoop2.x 企业正在用
   HDFS     存储
   MapReduce 计算
   YARN     资源和作业调度平台计算组件都会on yarn

hadoop3.x ???

EC技术：Erasure Encoding 简称EC，是Hadoop3给HDFS拓展的一种新特性，用来解决存储空间文件。
YARN：提供YARN的时间轴服务V.2，以便用户和开发人员可以对其进行测试，并提供反馈意见。
优化Hadoop Shell脚本
重构Hadoop Client Jar包
支持随机Container
MapReduce任务级本地优化
支持多个NameNode
部分默认服务端口被改变
支持文件系统连接器
DataNode内部添加了负载均衡
重构后台程序和任务对管理

2.Maven部署

blog
2.1解压

[root@hadoop1 softwore]# pwd
/opt/softwore
[root@hadoop1 softwore]# ls
apache-maven-3.3.9-bin.zip hadoop-2.8.1-src.tar.gz jdk-8u45-linux-x64.gz
findbugs-1.3.9.zip hadoop-2.8.1.tar.gz protobuf-2.5.0.tar.gz
[root@hadoop1 softwore]# unzip apache-maven-3.3.9-bin.zip

2.2配置mavne目录
2.3查看配置文件和解压我们准备好的仓库文件

3.Hadoop编译
3.1解压
3.2查看pom.xml
3.3查看BUILDING.txt
Requirements:编译软件环境要求

* Unix System
* JDK 1.7+
* Maven 3.0 or later
* Findbugs 1.3.9 (if running findbugs)
* ProtocolBuffer 2.5.0
* CMake 2.6 or newer (if compiling native code), must be 3.0 or newer on Mac
* Zlib devel (if compiling native code)
* openssl devel (if compiling native hadoop-pipes and to get the best HDFS encryption performance)
* Linux FUSE (Filesystem in Userspace) version 2.6 or above (if compiling fuse_dfs)
* Internet connection for first build (to fetch all Maven and Hadoop dependencies)

3.4 JDK部署

[root@hadoop1 softwore]# tar -zxvf jdk-8u45-linux-x64.gz -C /usr/java[root@hadoop1 softwore]# ls -ld /usr/java/*
drwxr-xr-x 8 root root 4096 12月 15 2016 /usr/java/djdk1.7.0_79
drwxr-xr-x 8 uucp 143 4096 4月 11 2015 /usr/java/jdk1.8.0_45
drwxr-xr-x 8 uucp 143 4096 10月 7 2015 /usr/java/jdk1.8.0_65
[root@hadoop1 softwore]# vim /etc/profile

export JAVA_HOME=/usr/java/jdk1.8.0_45
export JRE_HOME=/usr/java/jdk1.8.0_45/jre

[root@hadoop1 softwore]# source /etc/profile
[root@hadoop1 softwore]# java -version
java version "1.8.0_45"
Java(TM) SE Runtime Environment (build 1.8.0_45-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.45-b02, mixed mode)

3.5 MAVEN
[root@hadoop000 hadoop-2.8.1-src]# mvn --version
Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-11T00:41:47+08:00)
Maven home: /opt/software/apache-maven-3.3.9
Java version: 1.8.0_45, vendor: Oracle Corporation
Java home: /usr/java/jdk1.8.0_45/jre
Default locale: en_US, platform encoding: UTF-8
OS name: "linux", version: "2.6.32-431.el6.x86_64", arch: "amd64", family: "unix"
[root@hadoop000 hadoop-2.8.1-src]#

3.6 FINDBUGS
[root@hadoop000 findbugs-1.3.9]# findbugs -version
1.3.9
[root@hadoop000 findbugs-1.3.9]#

3.7 PROTOCBUF
[root@hadoop000 local]# protoc --version
libprotoc 2.5.0
[root@hadoop000 local]#

3.8 OTHER

3.9 编译
mvn clean package -Pdist,native -DskipTests -Dtar

3.10 解读

4.hadoop部署
单机部署进程没有
伪分布式部署进程存在+1节点开发
集群部署进程存在+n节点开发/生产

下载的包: src 源代码包里面不包含jar 小
不带src或者带bin 编译好的组件大

4.1解压
tar -xzvf hadoop-2.8.1.tar.gz
chown -R root:root hadoop-2.8.1
4.2解读解压文件
[root@hadoop000 hadoop-2.8.1]# ll
total 148
drwxrwxr-x. 2 root root 4096 Jun 2 2017 bin
drwxrwxr-x. 3 root root 4096 Jun 2 2017 etc
drwxrwxr-x. 2 root root 4096 Jun 2 2017 include
drwxrwxr-x. 3 root root 4096 Jun 2 2017 lib
drwxrwxr-x. 2 root root 4096 Jun 2 2017 libexec
-rw-rw-r--. 1 root root 99253 Jun 2 2017 LICENSE.txt
-rw-rw-r--. 1 root root 15915 Jun 2 2017 NOTICE.txt
-rw-r--r--. 1 root root 1366 Jun 2 2017 README.txt
drwxrwxr-x. 2 root root 4096 Jun 2 2017 sbin
drwxrwxr-x. 4 root root 4096 Jun 2 2017 share
[root@hadoop000 hadoop-2.8.1]#
bin 执行命令的shell
etc 配置文件
lib 库
sbin 启动和关闭hadoop
share jar

[root@hadoop000 hadoop-2.8.1]# rm -f bin/*.cmd
[root@hadoop000 hadoop-2.8.1]# rm -f sbin/*.cmd
[root@hadoop000 hadoop-2.8.1]#
[root@hadoop000 hadoop-2.8.1]# ll bin
total 348
-rwxrwxr-x. 1 root root 139387 Jun 2 2017 container-executor
-rwxrwxr-x. 1 root root  6514 Jun 2 2017 hadoop
-rwxrwxr-x. 1 root root 12330 Jun 2 2017 hdfs
-rwxrwxr-x. 1 root root  6237 Jun 2 2017 mapred
-rwxrwxr-x. 1 root root  1776 Jun 2 2017 rcc
-rwxrwxr-x. 1 root root 156812 Jun 2 2017 test-container-executor
-rwxrwxr-x. 1 root root 14416 Jun 2 2017 yarn
[root@hadoop000 hadoop-2.8.1]#

4.3配置环境变量
[root@hadoop000 ~]# vi /etc/profile
export HADOOP_HOME=/opt/software/hadoop-2.8.1
export PATH=$HADOOP_HOME/bin:$PROTOC_HOME/bin:$FINDBUGS_HOME/bin:$MVN_HOME/bin:$JAVA_HOME/bin:$PATH
[root@hadoop000 ~]# source /etc/profile

[root@hadoop000 ~]# which hadoop
/opt/software/hadoop-2.8.1/bin/hadoop

4.4配置core-site文件
etc/hadoop/core-site.xml:

<configuration>
   <property>
       <name>fs.defaultFS</name>
       <value>hdfs://localhost:9000</value>
   </property>
</configuration>

etc/hadoop/hdfs-site.xml:

<configuration>
   <property>
       <name>dfs.replication</name>
       <value>1</value>
   </property>
</configuration>

4.5ssh
[root@hadoop000 ~]# rm -rf .ssh

[root@hadoop000 ~]# ssh-keygen
[root@hadoop000 ~]# cd .ssh
[root@hadoop000 .ssh]# ll
total 8
-rw-------. 1 root root 1671 May 13 21:47 id_rsa
-rw-r--r--. 1 root root 396 May 13 21:47 id_rsa.pub
[root@hadoop000 .ssh]# cat id_rsa.pub >> authorized_keys
[root@hadoop000 .ssh]#

[root@hadoop000 ~]# ssh localhost date
The authenticity of host 'localhost (::1)' can't be established.
RSA key fingerprint is ec:85:86:32:22:94:d1:a9:f2:0b:c5:12:3f:ba:e2:61.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'localhost' (RSA) to the list of known hosts.
Sun May 13 21:49:14 CST 2018
[root@hadoop000 ~]#
[root@hadoop000 ~]#
[root@hadoop000 ~]# ssh localhost date
Sun May 13 21:49:17 CST 2018
[root@hadoop000 ~]#

4.6 Format the filesystem:

$ bin/hdfs namenode -format

4.7 java home配置
[root@hadoop000 hadoop]# vi hadoop-env.sh
export JAVA_HOME=/usr/java/jdk1.8.0_45

4.8 Start NameNode daemon and DataNode daemon:
[root@hadoop000 hadoop-2.8.1]# sbin/start-dfs.sh
Starting namenodes on [localhost]
localhost: starting namenode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-root-namenode-hadoop000.out
localhost: starting datanode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-root-datanode-hadoop000.out
Starting secondary namenodes [0.0.0.0]
The authenticity of host '0.0.0.0 (0.0.0.0)' can't be established.
RSA key fingerprint is ec:85:86:32:22:94:d1:a9:f2:0b:c5:12:3f:ba:e2:61.
Are you sure you want to continue connecting (yes/no)? yes
0.0.0.0: Warning: Permanently added '0.0.0.0' (RSA) to the list of known hosts.
0.0.0.0: starting secondarynamenode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-root-secondarynamenode-hadoop000.out
[root@hadoop000 hadoop-2.8.1]#
[root@hadoop000 hadoop-2.8.1]#
[root@hadoop000 hadoop-2.8.1]#
[root@hadoop000 hadoop-2.8.1]#
[root@hadoop000 hadoop-2.8.1]# jps
16243 Jps
15943 DataNode
5127 Launcher
16139 SecondaryNameNode
15853 NameNode

[root@hadoop000 ~]# hdfs dfs -put jepson.log /
[root@hadoop000 ~]#
[root@hadoop000 ~]#
[root@hadoop000 ~]# hdfs dfs -ls /
Found 1 items
-rw-r--r-- 3 root supergroup 6 2018-05-13 21:57 /jepson.log
[root@hadoop000 ~]#
[root@hadoop000 ~]# hdfs dfs -cat /jepson.log
A
5
6
[root@hadoop000 ~]#
[root@hadoop000 ~]#
[root@hadoop000 ~]# cat jepson.log
A
5
6
[root@hadoop000 ~]#

0513作业:
1.hadoop编译
2.hdfs伪分布式部署
3.以上两篇blog

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