CentOS 7 Install Hadoop Cluster

By Centos

Prepare three virtual machines, ip are 192.168.220.10 (master), 192.168.220.11 (slave1), 192.168.220.12 (slave2)

Ready jdk-6u45-linux- x64.bin and hadoop-1.2.1-bin.tar.gz, placed in the /usr/local/src/ directory

Install JDK (installed on each virtual machine )

1. Enter the /usr/local/src/ directory and execute ./jdk-6u45-linux-x64.bin

2. Modify ~/.bashrc, in the file Add three lines at the end

export JAVA_HOME=/usr/local/src/jdk1.6.0_45
export CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib
export PATH=$PATH:$JAVA_HOME/bin

　　

3. Make the environment variable take effect, execute source ~/.bashrc

Install Hadoop

Install hadoop on the 192.168.220.10 machine

1. Go to the /usr/local/src/ directory, unzip hadoop-1.2.1-bin.tar.gz, and execute tar -zxf hadoop -1.2.1-bin.tar.gz

2. Modify the configuration file

masters file

master

　　

slaves file

slave1
slave2

　　

core-site.xml file



hadoop.tmp.dir
/usr/local/src/hadoop-1.2.1/tmp


fs.default.name
hdfs://192.168.220.10:9000

　　

mapred-site.xml file



mapred.job.tracker
http://192.168.220.10:9001

　　

hdfs-site.xml file



dfs.replication
3

　　

hadoop-env.sh file, add a line at the end

export JAVA_HOME=/usr/local/src/jdk1.6.0_45

　　

3. Copy the /usr/local/src/hadoop-1.2.1 directory to the 192.168.220.11, 192.168.220.12 machine

< p>Configure hostname

Configure the hostname of 192.168.220.10 as master

1. Execute hostname master

2. Modify/ etc/hostname file

master

　　

Modify the host name of 192.168.220.11 to slave1, and modify the host name of 192.168.220.12 to slave2

Configure the host file

Add the following code to the end of the host file of the three machines

192.168.220.10 master

192.168.220.11 slave1

192.168.220.12 slave2

Configure SSH

1. Execute ssh-keygen on 192.168.220.10, and add a new .ssh directory under the ~ directory. The file in the directory is id_rsa, id_rsa.pub

2. Copy id_rsa.pub to authorized_keys

cp id_rsa.pub authorized_keys

3. Execute ssh-keygen on 192.168.220.11 and 192.168.220.12 respectively

4. Put 192.168.220.11 and 192.168.220.12 on The contents of id_rsa.pub are copied to the authorized_keys file of 192.168.220.10, as follows:

ssh -rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC9mGRhFOdcoHw9GUnKQmqThNKpsyah93Dtq / d8RICGWIHDRJ3GXd0sEcb743ejwbuCMmtlhheXcU0FuyA6Cm0jvMyvDfaPKArtxl6KT7Z93uC0VDCXDRomueux81HAIVjc7ZqlXwVeYs1LITxEeJykKlFOXvK7JexWhWGdMMADwxbFMbaNsZ9EwRxcFLFtNg65FQ + u8CIV9KR3D02kemwLCsP + xiRcgs + wirQPm5JM + 2cJoLsVQBz3Hk335IsEhc1Xb9Cralo8Tt8gh / ho8K / 1pVjvyW1b0LkP9HGNdwVYD9wkWdEJRkryLXBEXpjk4xu + riF +  N4rOzJD [email pr otected]

   ssh  -rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDn79fdfR / NjzPVD3NPj1vBBfQdVOrv7jeb4UJCOsd7xioPRiz8gOQnOmhu5C + GchbyGA + tg5pXwnNJTOO2wn32U4lOPndW0okN / wqyN4vgq / taJi7JgY / 8rneBiGaIIdNIy / pAGlMwb53Qn766adetMhsxYMD2l4uxmbVVjzCRb8QP5EsAYTmmFOODzJsPm70uF3j1Q8zGavYg0wFSYR / yECQns4DBSuBJNxdGY6PskBXqurahwi5yaR3vWV1Ix4wtB6BYuQomEnGdzOSfrBMZ / yc5tXo0xmEfY7wFkize6z9Pm2E3oDoMR18YkwT1Cz6fHikVILA9cldtL [emailprotected]

   ssh  -rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCydYCvASzCZggks4hMqOcYSGLO2eAvocWezNOMwspTfpJ105Jumb / vf5h6cRZeckq56IvhSV6t6mytk4pZoZjjZPSmWvCwLtMRMPShNbA3BYtj5V3WRKV8ZcMrNdD  //   U7iHHoJm57vI / m + XO42YSYjPw7JDkb8Ij9b6zgI3fyvbSSYeXb451PlyJLHdxIzRMAaZDSbAML9e7EO8VJB9Wf9bXpow4 + VeP33it3kgMNUlHQtyqduSwYGxVVtGsUTJkxnuRsbWeeA1 / pp8MNFKUgBTMALTVHByglgZqwGcbblJxsG832PIZNRECIFqorm6odftjnT4DR7 / 0yR [email protected]    
 5 to 192.168.220.10 authorized_keys file copy. Go to the 192.168.220.11 and 192.168.220.12 machines
 
After the configuration is complete, the three machines can access each other without a password
 
 
Okay, here is the Hadoop cluster After the configuration, let’s use it
 
Format the namenode on 192.168.220.10
 
Go to the /usr/local/src/hadoop-1.2.1/bin directory and execute 
 
 
./hadoop namenode -format




appear




19/08/04 15:15:21 INFO namenode.NameNode: STARTUP_MSG:

/************* ***********************************************

STARTUP_MSG: Starting NameNode

STARTUP_MSG: host = master/192.168.220.10

STARTUP_MSG: args = [-format]

STARTUP_MSG: version = 1.2.1

STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/ branch-1.2 -r 1503152; compiled by'mattf' on Mon Jul 22 15:23:09 PDT 2013

STARTUP_MSG: java = 1.6.0_45

*********************************************** **************/

19/08/04 15:15:21 INFO util.GSet: Computing capacity for map BlocksMap

19/08/04 15:15:21 INFO util.GSet: VM type = 64-bit

19/08/04 15:15:21 INFO util.GSet: 2.0% max memory = 1013645312

19/08/04 15:15:21 INFO util.GSet: capacity = 2^21 = 2097152 entries

19/08/04 15:15:21 INFO util.GSet: recommended=2097152, actual=2097152

19/08/04 15:15:22 INFO namenode.FSNamesystem: fsOwner=root

19/08/04 15:15:22 INFO namenode.FSNamesystem: supergroup=supergroup

19/08/04 15:15:22 INFO namenode.FSNamesystem: isPermissionEnabled=true

19/08/04 15:15:22 INFO namenode.FSNamesystem: dfs.block.invalidate.limit=100

19/08/04 15:15:22 INFO namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0< /span> min(s), accessTokenLifetime=0 min(s)

19/08/04 15:15:22 INFO namenode.FSEditLog: dfs.namenode.edits.toleration.length = 0

19/08/04 15:15:22 INFO namenode.NameNode: Caching file names occuring more than 10 times

19/08/04 15:15:23 INFO common.Storage: Image file /usr/local/src/hadoop-1.2.1/tmp/dfs/name/current/fsimage of size 110 bytes saved in 0 seconds.

19/08/04 15:15:23 INFO namenode.FSEditLog: closing edit log: position=4, editlog=/usr/local/ src/hadoop-1.2.1/tmp/dfs/name/current/edits

19/08/04 15:15:23 INFO namenode.FSEditLog: close success: truncate to 4, editlog=/usr/local/src /hadoop-1.2.1/tmp/dfs/name/current/edits

19/08/04 15:15:23 INFO common.Storage: Storage directory /usr/local/src/hadoop-1.2.1/tmp/dfs/name has been successfully formatted.

19/08/04 15:15:23 INFO namenode.NameNode: SHUTDOWN_MSG:

/************* ***********************************************

SHUTDOWN_MSG: Shutting down NameNode at master/192.168.220.10

*********************************************** **************/




Use jps to view the process 




[[emailprotected] bin]# jps

19905 JobTracker

19650 NameNode

19821 SecondaryNameNode

20202 Jps




Check the process at 192.168.220.11




9289 DataNode

9493 Jps

9391 TaskTracker






Check the progress at 192.168.220.12 




6823 DataNode

6923 TaskTracker

7057 Jps




Under test:


Execute./ hadoop fs -ls /




drwxr-xr-x-root supergroup 0 2019-08-04 15:15 /usr




Upload files, execute ./hadoop fs -put /root/w.txt /


View file execution. /hadoop fs -cat /w.txt, display




 ddd




Success




export JAVA_HOME=/usr/local/src/jdk1 .6.0_45
export CLASSPATH=.:$CLASSPATH:$JAVA_HOME/lib
export PATH=$PATH:$JAVA_HOME/bin





master





slave1
slave2







hadoop.tmp.dir
/usr/local/src/hadoop-1.2.1/tmp


fs.default.name
hdfs://192.168.220.10:9000









mapred.job.tracker
http://192.168.220.10:9001









dfs.replication
3







export JAVA_HOME=/usr/local/src/jdk1.6.0_45





master





192.168.220.10< span style="color: #000000;"> master

192.168.220.11 slave1

192.168.220.12 slave2




cp id_rsa.pub authorized_keys




 ssh  -rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC9mGRhFOdcoHw9GUnKQmqThNKpsyah93Dtq / d8RICGWIHDRJ3GXd0sEcb743ejwbuCMmtlhheXcU0FuyA6Cm0jvMyvDfaPKArtxl6KT7Z93uC0VDCXDRomueux81HAIVjc7ZqlXwVeYs1LITxEeJykKlFOXvK7JexWhWGdMMADwxbFMbaNsZ9EwRxcFLFtNg65FQ + u8CIV9KR3D02kemwLCsP + xiRcgs + wirQPm5JM + 2cJoLsVQBz3Hk335IsEhc1Xb9Cralo8Tt8gh / ho8K / 1pVjvyW1b0LkP9HGNdwVYD9wkWdEJRkryLXBEXpjk4xu + riF +  N4rOzJD [email protected]

   ssh  -rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDn79fdfR / NjzPVD3NPj1vBBfQdVOrv7jeb4UJCOsd7xioPRiz8gOQnOmhu5C + GchbyGA + tg5pXwnNJTOO2wn32U4lOPndW0okN / wqyN4vgq / taJi7JgY / 8rneBiGaIIdNIy / pAGlMwb53Qn766adetMhsxYMD2l4uxmbVVjzCRb8QP5EsAYTmmFOODzJsPm70uF3j1Q8zGavYg0wFSYR / yECQns4DBSuBJNxdGY6PskBXqurahwi5yaR3vWV1Ix4wtB6BYuQomEnGdzOSfrBMZ / yc5tXo0xmEfY7wFkize6z9Pm2E3oDoMR18YkwT1Cz6fHikVILA9cldtL [emailprotected]

   ssh  -rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQCydYCvASzCZggks4hMqOcYSGLO2eAvocWezNOMwspTfpJ105Jumb / vf5h6cRZeckq56IvhSV6t6mytk4pZoZjjZPSmWvCwLtMRMPShNbA3BYtj5V3WRKV8ZcMrNdD  //   U7iHHoJm57vI / m + XO42YSYjPw7JDkb8Ij9b6zgI3fyvbSSYeXb451PlyJLHdxIzRMAaZDSbAML9e7EO8VJB9Wf9bXpow4 + VeP33it3kgMNUlHQtyqduSwYGxVVtGsUTJkxnuRsbWeeA1 / pp8MNFKUgBTMALTVHByglgZqwGcbblJxsG832PIZNRECIFqorm6odftjnT4DR7 / 0yR [email protected]    
 
 ./ hadoop namenode -format < /pre>
19/08/< span style="color: #800080;">04 15:15:21 INFO namenode.NameNode: STARTUP_MSG:

/************* ***********************************************

STARTUP_MSG: Starting NameNode

STARTUP_MSG: host = master/192.168.220.10

STARTUP_MSG: args = [-format]

STARTUP_MSG: version = 1.2.1

STARTUP_MSG: build = https://svn.apache.org/repos/asf/hadoop/common/branches/ branch-1.2 -r 1503152; compiled by'mattf' on Mon Jul 22 15:23:09 PDT 2013

STARTUP_MSG: java = 1.6.0_45

*********************************************** **************/

19/08/04 15:15:21 INFO util.GSet: Computing capacity for map BlocksMap

19/08/04 15:15:21 INFO util.GSet: VM type = 64-bit

19/08/04 15:15:21 INFO util.GSet: 2.0% max memory = 1013645312

19/08/04 15:15:21 INFO util.GSet: capacity = 2^21 = 2097152 entries

19/08/04 15:15:21 INFO util.GSet: recommended=2097152, actual=2097152

19/08/04 15:15:22 INFO namenode.FSNamesystem: fsOwner=root

19/08/04 15:15:22 INFO namenode.FSNamesystem: supergroup=supergroup

19/08/04 15:15:22 INFO namenode.FSNamesystem: isPermissionEnabled=true

19/08/04 15:15:22 INFO namenode.FSNamesystem: dfs.block.invalidate.limit=100

19/08/04 15:15:22 INFO namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0< /span> min(s), accessTokenLifetime=0 min(s)

19/08/04 15:15:22 INFO namenode.FSEditLog: dfs.namenode.edits.toleration.length = 0

19/08/04 15:15:22 INFO namenode.NameNode: Caching file names occuring more than 10 times

19/08/04 15:15:23 INFO common.Storage: Image file /usr/local/src/hadoop-1.2.1/tmp/dfs/name/current/fsimage of size 110 bytes saved in 0 seconds.

19/08/04 15:15:23 INFO namenode.FSEditLog: closing edit log: position=4, editlog=/usr/local/ src/hadoop-1.2.1/tmp/dfs/name/current/edits

19/08/04 15:15:23 INFO namenode.FSEditLog: close success: truncate to 4, editlog=/usr/local/src /hadoop-1.2.1/tmp/dfs/name/current/edits

19/08/04 15:15:23 INFO common.Storage: Storage directory /usr/local/src/hadoop-1.2.1/tmp/dfs/name has been successfully formatted.

19/08/04 15:15:23 INFO namenode.NameNode: SHUTDOWN_MSG:

/************* ***********************************************

SHUTDOWN_MSG: Shutting down NameNode at master/192.168.220.10

*********************************************** **************/




< span style="color: #000000;">[[emailprotected] bin]# jps

19905 JobTracker

19650 NameNode

19821 SecondaryNameNode

20202 Jps




9289 DataNode

9493 Jps

9391 TaskTracker




6823 DataNode

6923 TaskTracker

7057 Jps




drwxr-xr-x-root supergroup 0 2019-08 -04 15:15< /span> /usr




ddd
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