Install and configure Hadoop2.2.0 on CentOS

Deployment of Hadoop2.2.0

Machine environment:

Operating System: CentOS 6.4 64-bit System

Hadoop version: hadoop-2.2.0, self-compiled 64-bit version under CentOS.

Procedure:

1. Assume there are four machines in total, and the username of each machine is set to myhadoop (for ease of installation and configuration, and for permission issues)

Machine name IP Address Allocation

Hadoop1 10.172.169.191 namenode, ResourceManager

Hadoop2 10.172.169.192 datanode, NodeManager

Hadoop3 10.172.169.193 datanode, NodeManager

Hadoop4 10.172.169.194 datanode, NodeManager

2. Each machine is installed with javajdk and corresponding environment variables are configured. The installation path and java environment variables of each machine must be consistent.

3. Disable the Firewall

Switch to the root account

Enable: chkconfigiptables on

Close: chkconfigiptables off

It takes effect permanently after restart

4. Configure the/etc/host file for each server.

Under the root account, open the/etc/host file and add IP Address Resolution

Hadoop1 10.172.169.191

Hadoop2 10.172.169.192

Hadoop3 10.172.169.193

Hadoop4 10.172.169.194

5. Configure ssh login without a password

(1). On the namenode Machine

Cd/home/myhadoop

Ssh-keygen-t rsa

Press ENTER

(2) import the public key to the local authentication File

Cat ~ /. Ssh/id_rsa.pub> ~ /. Ssh/authorized_keys

(3) import the public key to another datanode node authentication File

Scp ~ /. Ssh/authorized_keys myhadoop@10.172.169.192:/home/myhadoop/. ssh/authorized_keys

Scp ~ /. Ssh/authorized_keys myhadoop@10.172.169.193:/home/myhadoop/. ssh/authorized_keys

Scp ~ /. Ssh/authorized_keys myhadoop@10.172.169.194:/home/myhadoop/. ssh/authorized_keys

(4). Modify the file permissions on all machines

Chmod 700 ~ /. Ssh

Chmod 600 ~ /. Ssh/authorized_keys

(5). Test whether you can log on without a password through ssh.

If namenode can log on to each datanode machine without a password, the configuration is successful.

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