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This article mainly shows you "how to achieve single-node building in Hadoop". The content is simple and clear. I hope it can help you solve your doubts. Let me lead you to study and learn this article "how to achieve single-node building in Hadoop".

# Hadoop single Node Construction

Environment: VirtualBox Unbuntu14.04 LTS

# # install JDK # check the latest package information of the current java version java-version # sudo apt-get updata # install JDK sudo apt-get install default-jdk # and then view the java version java-version # # install SSH # sudo apt-get install ssh # # install rsync sudo apt-get install rsync

Configure sshssh-keygen-t dsa-p''- f ~ / .ssh/id_dsa # to generate the key ll ~ / .ssh # to see if there is an id_dsa.pub file cat ~ / .ssh/id_dsa.pub > > ~ / .ssh/authorized_keys # add the public key to the license file

# # install Hadoop # first of all, make sure that the virtual machine can be linked to the network and change the virtual machine to network address translation NAT # Hadoop official website https://archive.apache.org/dist/hadoop/common # if you choose 2.6.0, use the wget command to download wget https://archive.apache.org/dist/hadoop/common/hadoop-2.6.0/hadoop-2. .6.0.tar.gz # extract sudo tar-zxvf hadoop-2.6.0.tar.gz # move to the specified path sudo mv hadoop-2.6.0 / usr/local/hadoop # check whether the file is complete # set the environment variable sudo gedit ~ / .bashrc export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64 # java path export HADOOP_HOME=/usr/local/hadoop # Hadoop path export PATH=$PATH:$HADOOP_HOME/bin export PATH=$PATH:$HADOOP_HOME/sbin export HADOOP_MAPRED_HOME=$HADOOP_HOME export HADOOP_COMMON_HOME=$HADOOP_HOME export HADOOP_HDFS_HOME=$HADOOP_HOME export YARN_HOME=$HADOOP_HOME export HADOOP_COMMON_HOME=$HADOOP_HOME export HADOOP_HDFS_HOME=$HADOOP_HOME export YARN_HOME=$HADOOP_HOME export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native # Link Library export HADOOP_OPTS= "- Djava.library.path=$HADOOP_HOME/lib" # Link Library export JAVA_LIBRARY_PATH=$HADOOP_HOME / lib/native:$JAVA_LIBRARY_PATH # restart the environment variables or enter source ~ / .bashrc # modify the hadoop configuration file # modify hadoop-env.sh sudo gedit hadoop-env.sh

# The java implementation to use. Export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64

# modify core-site.xml sudo gedit core-site.xml

Fs.default.name hdfs://localhost:9000

# modify yarn-site.xml sudo gedit yarn-site.xml

Yarn.nodemanager.aux-services mapreduce_shuffle yarn.nodemanager.aux-services.mapreduce.shuffle.class org.apache.hadoop.mapred.ShuffleHandler

# modify mapred-site.xml sudo scp mapred-site.xml.template mapred-site.xml sudo gedit mapred-site.xml

Mapreduce.framework.name yarn

# modify hdfs-site.xml sudo gedit hdfs-site.xml

Dfs.replication 3 dfs.namenode.name.dir file:/usr/local/hadoop/hadoop_data/hdfs/namenode dfs.datanode.data.dir file:/usr/local/hadoop/hadoop_data/hdfs/datanode

# create the corresponding directory sudo mkdir-p / usr/local/hadoop/hadoop_data/hdfs/namenode # NameNode storage directory sudo mkdir-p / usr/local/hadoop/hadoop_data/hdfs/datanode # DataNode storage directory sudo chown hduser:hduser-R / usr/local/hadoop # modify the directory owner # format namenode hadoop namenode-format # launch hadoop start-dfs.sh start-yarn.sh # View

Enter http://localhost:8088 in the browser to view the Hadoop ResourceManager Web interface and click Nodes to view the current node

# enter http://localhost:50070 in the browser to view the NameNode HDFS Web interface and click Datanodes to display the currently launched Datanode

# # reference to all commands

1 cd / usr/local/ 2 ll 3 rm-rf hadoop/ 4 sudo rm-rf hadoop/ 5 ll 6 update-alternatives-- display java 7 java-version 8 sudo apt-get update 9 sudo apt-get install default-jdk 10 java-version 11 update-alternatives-display java # check See the java installation path 12 sudo apt-get install ssh 13 sudo apt-get install rsync 14 ssh-keygen-t dsa-P'- f / .ssh/id_dsa 15 ll ~ / .ssh 16 cat ~ / .ssh/id_dsa.pub > > ~ / .ssh/authorized_keys 17 wget https://archive.apache.org/dist/hadoop/common/hadoop-2 .6.0/hadoop-2.6.0.tar.gz 18 ll 19 sudo tar-zxvf hadoop-2.6.0.tar.gz 20 sudo mv hadoop-2.6.0 / usr/local/hadoop 21 ll / usr/local/hadoop 22 ll 23 cd / usr/local 24 ls 25 cd hadoop/ 26 ll 27 cd / 28 cd 29 wget https://archive.apache.org/dist/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz.md5 30 wget https://archive.apache.org/dist/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz.mds 31 ll 32. / hadoop- 2.6.0.tar.gz.mds 33 sudo. / hadoop-2.6.0.tar.gz.mds 34 cd / usr/local/hadoop/ 35 ll 36 cd ~ 37 ll 38 wget https://archive.apache.org/dist/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz.md5 39 ll 40 md5sum-c hadoop-2.6.0.tar.gz.md5 # check whether the downloaded file is complete 41 md5sum-c hadoop-2.6.0.tar.gz.mds 42 md5sum-c hadoop-2.6.0.tar.gz.md5 43 rm-f hadoop-2.6.0.tar.gz 44 rm-f hadoop-2.6.0.tar.gz .1 45 rm-f hadoop-2.6.0.tar.gz.mds 46 ll 47 wget https://archive.apache.org/dist/hadoop/common/hadoop-2.6.0/hadoop-2.6.0.tar.gz 48 sudo tar-zxvf hadoop-2.6.0.tar.gz 49 sudo mv hadoop-2.6.0 / usr/local/hadoop 50 ll / usr/local/ 51 cd hadoop 52 ll / usr/local/hadoop/ 53 md5sum-c hadoop-2.6.0.tar.gz.md5 54 sudo gedit ~ / .bashrc 55 source ~ / .bashrc 56 cd / usr/local/hadoop/etc/hadoop/ 57 ll 58 sudo gedit hadoop-env.sh 59 sudo gedit Core-site.xml 60 sudo gedit yarn-site.xml 61 sudo scp mapred-site.xml.template mapred-site.xml 62 sudo gedit mapred-site.xml 63 sudo gedit hdfs-site.xml 64 sudo mkdir-p / usr/local/hadoop/hadoop_data/hdfs/namenode 65 sudo mkdir-p / usr/local/hadoop/hadoop_data/hdfs/datanode 66 sudo chown Hduser:hduser-R / usr/local/hadoop 67 hadoop namenode-format 68 start-dfs.sh 69 start-yarn.sh 70 jps 71 history are all the contents of the article "how to build a single Node in Hadoop" Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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