Hadoop: Difference between revisions
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* [https://dev.to/aws-builders/ssh-setup-and-tunneling-via-bastion-host-3kcc AWS » Bastion Host SSH Tunneling] | * [https://dev.to/aws-builders/ssh-setup-and-tunneling-via-bastion-host-3kcc AWS » Bastion Host SSH Tunneling] | ||
* [https://www.datacamp.com/tutorial/installation-of-pyspark Installation of PySpark] | * [https://www.datacamp.com/tutorial/installation-of-pyspark Installation of PySpark] | ||
* [[Bastion SSH Tunneling]] | |||
* [[Linux Containers]] | * [[Linux Containers]] | ||
Revision as of 09:52, 9 January 2023
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
Unit Testing
lxc launch images:debian/12 agronomy &&
lxc exec agronomy bash <<'EOF'
sleep 5
apt-get install -y curl wget openjdk-11-jre\
openssh-client openssh-server
systemctl daemon-reload
systemctl restart sshd
systemctl status sshd
java -version
EOF
|
lxc launch images:fedora/37 robotics &&
lxc exec robotics bash <<'EOF'
sleep 5
dnf install -y curl wget java-11-openjdk\
openssh-client openssh-server
systemctl daemon-reload
systemctl restart sshd
systemctl status sshd
java -version
EOF
|
lxc launch images:ubuntu/22.04 software &&
lxc exec software bash <<'EOF'
sleep 5
apt-get install -y curl wget openjdk-11-jre\
openssh-client openssh-server
systemctl daemon-reload
systemctl restart sshd
systemctl status sshd
java -version
EOF
|
|
| ||
create alias: lxc stop agronomy lxc publish agronomy --alias\ debian/12:java:ssh create alias from snapshot: lxc snapshot agronomy java:ssh lxc publish agronomy/java:ssh --alias\ debian/12:java:ssh lxc delete agronomy launch alias: lxc launch debian/12:java:ssh agronomy && lxc exec agronomy bash lxc stop agronomy && lxc delete agronomy |
create alias: lxc stop robotics lxc publish robotics --alias\ fedora/37:java:ssh create alias from snapshot: lxc snapshot robotics java:ssh lxc publish robotics/java:ssh --alias\ fedora/37:java:ssh lxc delete robotics launch alias: lxc launch fedora/37:java:ssh robotics && lxc exec robotics bash lxc stop robotics && lxc delete robotics |
create alias: lxc stop software lxc publish software --alias\ ubuntu/22.04:java:ssh create alias from snapshot: lxc snapshot software java:ssh lxc publish software/java:ssh --alias\ ubuntu/22.04:java:ssh lxc delete software launch alias: lxc launch ubuntu/22.04:java:ssh software && lxc exec software bash lxc stop software && lxc delete software |
Knowledge
ssh-keygen -b 4096 -t rsa -f ~/.ssh/id_rsa -q -N "hadoop@${HOSTNAME}"
readlink -f /usr/bin/java | sed "s:bin/java::"
sudo apt-get install pdsh
sudo apt-get install ssh
| ||
|
| ||
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 $HADOOP_HOME/sbin/start-yarn.sh http://127.0.0.1:8088 | ||
|
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sudo apt dist-upgrade sudo do-release-upgrade sudo apt --fix-broken install sudo apt install ubuntu-desktop |
[Service]
User=hadoop
Group=hadoop
Type=forking
SuccessExitStatus=143
| |
|
| ||
if [ -f '/etc/os-release' ];then
HOST_OS_ID=$(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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declare -a HADOOP_SCHEDULERS=(dev prod);\
declare -A MINMAX_CAPACITIES=([dev]='50 50' [prod]='50 70');\
for HADOOP_SCHEDULER in ${HADOOP_SCHEDULERS[@]};do \
for MINMAX_CAPACITY in ${MINMAX_CAPACITIES[${HADOOP_SCHEDULER}]};do \
echo "${HADOOP_SCHEDULER} => ${MINMAX_CAPACITY}";\
done;\
done
| ||