Steps of configuring Hadoop 2.6 for centos6. X virtual machine

osc_ 34b9n45c 2021-01-23 13:46:19
steps configuring hadoop centos6. centos

  1. adopt xmanager Of Xftp Upload hadoop-2.6.4.tar.gz File to /opt Catalog

  2. decompression hadoop-2.6.4.tar.gz file
    tar -zxf hadoop-2.6.4.tar.gz -C /usr/local

After decompression, you can , notice /usr/local/hadoop-2.6.4 Folder

  1. To configure Hadoop

Entry directory :
cd /usr/local/hadoop-2.6.4/etc/hadoop/
Modify the following file in turn :
4.1 core-site.xml( At the bottom Configuration Add the following Configuration What's in the label , So are other documents )

export JAVA_HOME=/usr/java/jdk1.7.0_80

4.3 hdfs-site.xml


4.4 mapred-site.xml
Copy cp mapred-site.xml.template mapred-site.xml
<!-- jobhistory properties -->

4.5 yarn-site.xml
<description>URL for job history server</description>


export JAVA_HOME=/usr/java/jdk1.7.0_80

4.7 slaves
Delete localhost, add to :

4.8 Set up IP mapping
Edit the nodes /etc/hosts
add to : master slave1 slave2 slave3

4.9 Clone virtual machine , If you cloned it before configuration , You need to copy hadoop Install files to cluster slave node
scp -r /usr/local/hadoop-2.6.4 slave1:/usr/local
scp -r /usr/local/hadoop-2.6.4 slave2:/usr/local
scp -r /usr/local/hadoop-2.6.4 slave3:/usr/local

5. To configure SSH Password-free login
(1) Use ssh-keygen Generate public key and private key pairs .
Enter the command “ssh-keygen -t rsa”, Then press three times Enter key

[root@master ~]# ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Created directory '/root/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/
The key fingerprint is:
The key's randomart image is:
+--[ RSA 2048]----+
| .. |
| . .E|
| . = |
| . . o o |
| o S . . =|
| o * . o ++|
| . + . . o ooo|
| o . ..o |
| .|

Generate private key id_rsa And public key Two documents .
(2) use ssh-copy-id Copy the public key to the remote machine
ssh-copy-id -i /root/.ssh/ master// Input in sequence yes,123456(root User's password )
ssh-copy-id -i /root/.ssh/ slave1
ssh-copy-id -i /root/.ssh/ slave2
ssh-copy-id -i /root/.ssh/ slave3
(3) Verify that no password login is set
Input in sequence
ssh slave1
ssh slave2
ssh slave3

6. Configure time synchronization service
(1) install NTP service . At each node :
yum -y install ntp
(2) Set up master The node is NTP Service master ,
Use command “vim /etc/ntp.conf” open /etc/ntp.conf file , Comment out with server Beginning line , And add :
restrict mask nomodify notrap
fudge stratum 10

(3) In all slave Configuration in node NTP, Also modify /etc/ntp.conf file , Comment out server Beginning line , And add :
server master

(4) Carry out orders “service iptables stop & chkconfig iptables off” Turn off the firewall permanently , Both master and slave nodes are shut down .
(5) start-up NTP service .
① stay master Nodes execute commands “service ntpd start & chkconfig ntpd on”
② stay slave1、slave2、slave3 Carry out the order “ntpdate master” You can synchronize the time
③ stay slave1、slave2、slave3 On the implementation of separate “service ntpd start & chkconfig ntpd on” It starts and starts permanently NTP service .

7. stay /etc/profile add to JAVA_HOME and Hadoop route
export HADOOP_HOME=/usr/local/hadoop-2.6.4
export JAVA_HOME=/usr/java/jdk1.7.0_80
export PATH= H A D O O P H O M E / b i n : HADOOP_HOME/bin: PATH:$JAVA_HOME/bin

source /etc/profile Make changes effective

  1. format NameNode
    Entry directory
    cd /usr/local/hadoop-2.6.4/bin

Perform formatting
./hdfs namenode -format

9. Start cluster
Entry directory
cd /usr/local/hadoop-2.6.4/sbin
Execute startup :
./ start historyserver

Use jps, Check the process
[root@master sbin]# jps
1765 NameNode
1929 SecondaryNameNode
2378 JobHistoryServer
2412 Jps
2077 ResourceManager

[root@slave1 ~]# jps
1844 Jps
1612 DataNode
1711 NodeManager

  1. Turn off firewall ( Execute... On all nodes ):
    service iptables stop
    chkconfig iptables off

11. stay Windows Next C:\Windows\System32\drivers\etc\hosts add to IP mapping master slave1 slave2 slave3

  1. Browser view :


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