Hadoop部署方式:
1.單機模式standalone： 1個java進程
2.偽分布模式Pseudo-Distributed Mode：開發|學習多個java進程
3.集群模式Cluster Mode ：生產多臺機器多個java進程

偽分布式部署: HDFS

1.創建hadoop服務的一個用戶

[root@hadoop003 software]# useradd hadoop
[root@hadoop003 software]# id hadoop
uid=515(hadoop) gid=515(hadoop) groups=515(hadoop)
配置hadoop用戶權限
[root@hadoop003 software]# vi /etc/sudoers
hadoop ALL=(root) NOPASSWD:ALL

2.部署JAVA

Oracle jdk1.8(Open JDK盡量不要使用)
2.1 解壓+環境變量
上節已操作過
2.2 CDH課 /usr/java
查看Java服務路徑
[root@hadoop003 jdk1.8.0_45]# which java
/usr/java/jdk1.8.0_45/bin/java

3.部署ssh服務是運行

系統安裝時默認安裝ssh服務
[root@hadoop003 ~]# service sshd status
openssh-daemon (pid 1386) is running...

4.解壓hadoop，并進行軟連接

[root@hadoop003 software]# rz hadoop-2.8.1.tar.gz上傳壓縮包
[root@hadoop003 software]# tar -xzvf hadoop-2.8.1.tar.gz
[root@hadoop003 software]# ln -s /opt/software/hadoop-2.8.1 hadoop
修改權限
chown -R hadoop:hadoop hadoop
chown -R hadoop:hadoop hadoop/*
chown -R hadoop:hadoop /opt/software/hadoop-2.8.1
刪除無用文件
[root@hadoop003 software]# cd hadoop
[root@hadoop003 hadoop]# rm -f .txt
注意：
chown -R hadoop:hadoop 文件夾 -->文件夾和文件夾的里面的
chown -R hadoop:hadoop 軟連接文件夾 --> 只修改軟連接文件夾，不會修改文件夾里面的
chown -R hadoop:hadoop 軟連接文件夾/ --> 軟連接文件夾不修改，只會修改文件夾里面的
chown -R hadoop:hadoop hadoop-2.8.1 --> 修改原文件夾

bin/: 命令
etc/：配置文件
sbin/: 用來啟動關閉hadoop進程

5.切換hadoop用戶和配置

[root@hadoop003 hadoop]# su - hadoop
[hadoop@hadoop003 ~]$ ll
total 0
[hadoop@hadoop003 ~]$ cd /opt/software/hadoop
[hadoop@hadoop003 hadoop]$ ll
total 28
drwxr-xr-x. 2 hadoop hadoop 4096 Dec 10 11:54 bin
drwxr-xr-x. 3 hadoop hadoop 4096 Dec 10 11:54 etc
drwxr-xr-x. 2 hadoop hadoop 4096 Dec 10 11:54 include
drwxr-xr-x. 3 hadoop hadoop 4096 Dec 10 11:54 lib
drwxr-xr-x. 2 hadoop hadoop 4096 Dec 10 11:54 libexec
drwxr-xr-x. 2 hadoop hadoop 4096 Dec 10 11:54 sbin
drwxr-xr-x. 3 hadoop hadoop 4096 Dec 10 11:54 share
[hadoop@rzdatahadoop002 hadoop]$ cd etc/hadoop
說明：
hadoop-env.sh : hadoop配置環境
core-site.xml : hadoop 核心配置文件
hdfs-site.xml : hdfs服務的 --> 會起進程
[mapred-site.xml : mapred計算所需要的配置文件] 只當在jar計算時才有
yarn-site.xml : yarn服務的 --> 會起進程
slaves: 集群的機器名稱

[hadoop@hadoop003 hadoop]$ vi core-site.xml
添加：

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

[hadoop@hadoop003 hadoop]$ vi hdfs-site.xml
添加：

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

6.配置hadoop用戶的ssh的信任關系

[hadoop@hadoop003 ~]$ ssh-keygen -t rsa -P '' -f ~/.ssh/id_rsa
[hadoop@hadoop003 ~]$ cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
[hadoop@hadoop003 ~]$ chmod 0600 ~/.ssh/authorized_keys

第一次輸入需要yes
[hadoop@hadoop003 .ssh]$ ssh hadoop003 date
The authenticity of host 'hadoop003 (192.168.137.201)' can't be established.
RSA key fingerprint is 9a:ea:f5:06:bf:de:ca:82:66:51:81:fe:bf:8a:62:36.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'hadoop003,192.168.137.201' (RSA) to the list of known hosts.
Wed Dec 13 22:15:01 CST 2017
[hadoop@hadoop003 .ssh]$ ll
total 16
-rw-------. 1 hadoop hadoop 404 Dec 13 22:13 authorized_keys
-rw-------. 1 hadoop hadoop 1675 Dec 13 22:13 id_rsa
-rw-r--r--. 1 hadoop hadoop 404 Dec 13 22:13 id_rsa.pub
-rw-r--r--. 1 hadoop hadoop 413 Dec 13 22:15 known_hosts
第二次輸入，不需要
[hadoop@hadoop003 .ssh]$ ssh hadoop003 date
Wed Dec 13 22:15:07 CST 2017

7.格式化

[hadoop@hadoop003 hadoop]$ bin/hdfs namenode -format

8.啟動HDFS服務

[hadoop@hadoop003 sbin]$ ./start-dfs.sh
Starting namenodes on [localhost]
The authenticity of host 'localhost (::1)' can't be established.
RSA key fingerprint is 9a:ea:f5:06:bf:de:ca:82:66:51:81:fe:bf:8a:62:36.
Are you sure you want to continue connecting (yes/no)? yes
localhost: Warning: Permanently added 'localhost' (RSA) to the list of known hosts.
localhost: Error: JAVA_HOME is not set and could not be found.
localhost: Error: JAVA_HOME is not set and could not be found.
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 9a:ea:f5:06:bf:de:ca:82:66:51:81:fe:bf:8a:62:36.
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: Error: JAVA_HOME is not set and could not be found.
[hadoop@hadoop003 sbin]$ ps -ef|grep hadoop
root 11292 11085 0 21:59 pts/1 00:00:00 su - hadoop
hadoop 11293 11292 0 21:59 pts/1 00:00:00 -bash
hadoop 11822 11293 0 22:34 pts/1 00:00:00 ps -ef
hadoop 11823 11293 0 22:34 pts/1 00:00:00 grep hadoop
[hadoop@hadoop003 sbin]$ echo $JAVA_HOME
/usr/java/jdk1.8.0_45
發現JAVA_HOME變量是存在的，無法啟動HDFS服務
配置/etc/hadoop/hadoop-env.sh
[hadoop@hadoop003 sbin]$ vi ../etc/hadoop/hadoop-env.sh

The java implementation to use.添加：

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

[hadoop@hadoop003 sbin]$ ./start-dfs.sh
Starting namenodes on [localhost]
localhost: starting namenode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-hadoop-namenode-hadoop003.out
localhost: starting datanode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-hadoop-datanode-hadoop003.out
Starting secondary namenodes [0.0.0.0]
0.0.0.0: starting secondarynamenode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-hadoop-secondarynamenode-hadoop003.out

namenode(名稱節點) : localhost
datanode(數據節點) : localhost
secondary namenode(第二名稱節點): 0.0.0.0

http://localhost:50070/
默認的端口:50070
web: localhost:9000

9.使用命令(hadoop、hdfs)

[hadoop@hadoop003 bin]$ ./hdfs dfs -mkdir /user
[hadoop@hadoop003 bin]$ ./hdfs dfs -mkdir /user/hadoop

[hadoop@hadoop003 bin]$ echo "000000" > lizhigang.log
[hadoop@hadoop003 bin]$ ./hadoop fs -put lizhigang.log hdfs://localhost:9000/
[hadoop@hadoop003 bin]$
[hadoop@hadoop003 bin]$ ./hadoop fs -ls hdfs://localhost:9000/
Found 2 items
-rw-r--r-- 1 hadoop supergroup 7 2017-12-13 22:56 hdfs://localhost:9000/rz.log
drwxr-xr-x - hadoop supergroup 0 2017-12-13 22:55 hdfs://localhost:9000/user

[hadoop@hadoop003 bin]$ ./hadoop fs -ls /
Found 2 items
-rw-r--r-- 1 hadoop supergroup 7 2017-12-13 22:56 hdfs://localhost:9000/rz.log
drwxr-xr-x - hadoop supergroup 0 2017-12-13 22:55 hdfs://localhost:9000/user

10.修改hdfs://localhost:9000為hdfs://192.168.137.200:9000

[hadoop@hadoop003 bin]$ ../sbin/stop-dfs.sh 停止服務

[hadoop@hadoop003 bin]$ vi ../etc/hadoop/core-site.xml
修改為：

<configuration>
    <property>
            <name>fs.defaultFS</name>
            <value>hdfs://192.168.137.200:9000</value>
    </property>
</configuration>

[hadoop@hadoop003 bin]$ ./hdfs namenode -format
[hadoop@hadoop003 bin]$ ../sbin/start-dfs.sh
Starting namenodes on [hadoop003]
hadoop003: starting namenode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-hadoop-namenode-hadoop003.out
localhost: starting datanode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-hadoop-datanode-hadoop003.out
Starting secondary namenodes [0.0.0.0]
0.0.0.0: starting secondarynamenode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-hadoop-secondarynamenode-hadoop003.out
[hadoop@hadoop003 bin]$ netstat -nlp|grep 9000
(Not all processes could be identified, non-owned process info
will not be shown, you would have to be root to see it all.)
tcp 0 0 192.168.137.200:9000 0.0.0.0:* LISTEN
14974/java

11.修改HDFS的服務以hadoop003啟動

針對于datanode修改為hadoop003:
[hadoop@hadoop003 hadoop]$ vi slaves
修改為：
hadoop003

針對于secondarynamenode修改:
[hadoop@hadoop003 hadoop]$ vi hdfs-site.xml
添加：

        <property>
                 <name>dfs.namenode.secondary.http-address</name>
                 <value>hadoop003:50090</value>
        </property>
        <property>
                 <name>dfs.namenode.secondary.https-address</name>
                 <value>hadoop003:50091</value>
        </property>

[hadoop@hadoop003 hadoop]$ cd ../../sbin
[hadoop@hadoop003 sbin]$ ./stop-dfs.sh
[hadoop@hadoop003 sbin]$ ./start-dfs.sh
Starting namenodes on [hadoop003]
hadoop003: starting namenode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-hadoop-namenode-hadoop003.out
hadoop003: starting datanode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-hadoop-datanode-hadoop003.out
Starting secondary namenodes [hadoop003]
hadoop003: starting secondarynamenode, logging to /opt/software/hadoop-2.8.1/logs/hadoop-hadoop-secondarynamenode-hadoop003.out

12.Yarn部署

進入目錄：/opt/software/hadoop/etc/hadoop
[hadoop@hadoop003 hadoop]# cp mapred-site.xml.template mapred-site.xml
[hadoop@hadoop003 hadoop]# vi mapred-site.xml
添加：

<configuration>
    <property>
        <name>mapreduce.framework.name</name>
        <value>yarn</value>
    </property>
</configuration>

[hadoop@hadoop003 hadoop]# vi yarn-site.xml
添加：

<configuration>
<!-- Site specific YARN configuration properties -->
    <property>
        <name>yarn.nodemanager.aux-services</name>
        <value>mapreduce_shuffle</value>
    </property>
</configuration>

修改mapred-site.xml文件權限：
[hadoop@hadoop003 hadoop]# chown hadoop:hadoop *
啟動服務：
[hadoop@hadoop003 hadoop]$ sbin/start-yarn.sh
web界面查看：
http://192.168.137.200:8088/
http://localhost:8088/

13.MR Job測試

查看Mapreduce 測試例程路徑：
[hadoop@hadoop003 hadoop]$ find ./ -name "example"
執行：
[hadoop@hadoop003 hadoop]$ bin/hadoop jar ./share/hadoop/mapreduce/hadoop-mapreduce-examples-2.8.1.jar pi 5 10
注意：執行時Hadoop多次格式化出現17/12/19 00:19:51 WARN hdfs.DataStreamer: DataStreamer Excep
參考：https://blog.csdn.net/yu0_zhang0/article/details/78841623解決

停止Yarn：
[hadoop@hadoop003 sbin]$ ./stop-yarn.sh

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2 Hadoop偽分布模式部署 2018-05-16

2 Hadoop偽分布模式部署 2018-05-16

1.創建hadoop服務的一個用戶

2.部署JAVA

3.部署ssh服務是運行

4.解壓hadoop，并進行軟連接

5.切換hadoop用戶和配置

6.配置hadoop用戶的ssh的信任關系

7.格式化

8.啟動HDFS服務

The java implementation to use.添加：

9.使用命令(hadoop、hdfs)

10.修改hdfs://localhost:9000為hdfs://192.168.137.200:9000

11.修改HDFS的服務以hadoop003啟動

12.Yarn部署

13.MR Job測試

推薦閱讀更多精彩內容

三个男躁一个女,国精产品一区一手机的秘密,麦子交换系列最经典十句话,欧美 国产 综合 欧美 视频

2 Hadoop偽分布模式部署 2018-05-16

1.創建hadoop服務的一個用戶

2.部署JAVA

3.部署ssh服務是運行

4.解壓hadoop，并進行軟連接

5.切換hadoop用戶和配置

6.配置hadoop用戶的ssh的信任關系

7.格式化

8.啟動HDFS服務

The java implementation to use.添加：

9.使用命令(hadoop、hdfs)

10.修改hdfs://localhost:9000為hdfs://192.168.137.200:9000

11.修改HDFS的服務以hadoop003啟動

12.Yarn部署

13.MR Job測試

推薦閱讀更多精彩內容

三个男躁一个女,国精产品一区一手机的秘密,麦子交换系列最经典十句话,欧美国产综合欧美视频