Hadoop
Hadoop is a Java-based programming framework that supports the processing and storage of extremely large datasets on a cluster of inexpensive machines. It was the first major open source project in the big data playing field and is sponsored by the Apache Software Foundation. Hadoop is comprised of four main layers:
- Hadoop Common is the collection of utilities and libraries that support other Hadoop modules.
- HDFS, which stands for Hadoop Distributed File System, is responsible for persisting data to disk.
- YARN, short for Yet Another Resource Negotiator, is the "operating system" for HDFS.
- MapReduce is the original processing model for Hadoop clusters. It distributes work within the cluster or map, then organizes and reduces the results from the nodes into a response to a query. Many other processing models are available for the 3.x version of Hadoop
Configuration
mkdir -p /home/hadoop/hdfs/{datanode,namenode}/
sudo tee -a $HADOOP_HOME/etc/hadoop/core-site.xml >/dev/null <<EOF
<configuration>
<property>
<name>hadoop.tmp.dir</name>
<value>/home/hadoop/tmp</value>
</property>
<property>
<name>fs.default.name</name>
<value>hdfs://0.0.0.0:9000</value>
<description>The default file system URI</description>
</property>
</configuration>
EOF
mkdir -p /home/hadoop/hdfs/{datanode,namenode}
sudo tee -a $HADOOP_HOME/etc/hadoop/hdfs-site.xml >/dev/null <<EOF
<configuration>
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
<property>
<name>dfs.namenode.name.dir</name>
<value>/home/hadoop/hdfs/namenode/</value>
</property>
<property>
<name>dfs.datanode.data.dir</name>
<value>/home/hadoop/hdfs/datanode/</value>
</property>
</configuration>
EOF
sudo tee -a $HADOOP_HOME/etc/hadoop/mapred-site.xml >/dev/null <<EOF
<configuration>
<property>
<name>mapreduce.framework.name</name>
<value>yarn</value>
</property>
</configuration>
EOF
sudo tee -a $HADOOP_HOME/etc/hadoop/yarn-site.xml >/dev/null <<EOF
<configuration>
<property>
<name>yarn.nodemanager.aux-services</name>
<value>mapreduce_shuffle</value>
</property>
</configuration>
EOF
Knowledge
ssh-keygen -b 4096 -t rsa -f ~/.ssh/id_rsa -q -N "[email protected]" readlink -f /usr/bin/java | sed "s:bin/java::" sudo apt-get install pdsh sudo apt-get install ssh | ||
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su -h hadoop
hdfs namenode -format
sudo -u haddop -H sh -c "whoami; echo ${HOME}"
sh $HADOOP_HOME/sbin/start-dfs.sh http://127.0.0.1:9870 sh $HADOOP_HOME/sbin/start-yarn.sh http://127.0.0.1:8088 | ||
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sudo apt dist-upgrade sudo do-release-upgrade sudo apt --fix-broken install sudo apt install ubuntu-desktop |
[Service]
User=hadoop
Group=hadoop
Type=forking
SuccessExitStatus=143
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if [ -f '/etc/os-release' ];then
HOST_OS_ID=$(grep -oP '(?<=^ID=).+' /etc/os-release | tr -d '"')
HOST_OS_ID_LIKE=$(grep -oP '(?<=^ID_LIKE=).+' /etc/os-release | tr -d '"')
HOST_OS_VERSION=$(grep -oP '(?<=^VERSION_ID=).+' /etc/os-release | tr -d '"')
fi
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lxc launch images:fedora/37 robotics &&
lxc exec robotics bash <<'EOF'
sleep 5
dnf install -y curl java-11-openjdk
java -version
EOF
lxc snapshot robotics curl:java lxc stop robotics lxc publish robotics --alias\ fedora/37:curl:java lxc publish robotics/curl:java --alias\ fedora/37:curl:java |
lxc launch images:opensuse/15.3 agronomy &&
lxc exec agronomy bash <<'EOF'
sleep 5
zypper install -y curl java-11-openjdk
java -version
EOF
lxc snapshot agronomy curl:java lxc stop agronomy lxc publish agronomy --alias\ opensuse/15.3:curl:java lxc publish agronomy/curl:java --alias\ opensuse/15.3:curl:java |
lxc launch images:ubuntu/22.04 software &&
lxc exec software bash <<'EOF'
sleep 5
apt-get install -y curl openjdk-11-jdk
java -version
EOF
lxc snapshot software curl:java lxc stop software lxc publish software --alias\ ubuntu:22.04:curl:java lxc publish software/curl:java --alias\ ubuntu:22.04:curl:java |