Hadoop: Difference between revisions
Jump to navigation
Jump to search
| Line 73: | Line 73: | ||
lxc exec agronomy bash <<'EOF' | lxc exec agronomy bash <<'EOF' | ||
sleep 5 | sleep 5 | ||
apt-get install -y curl openjdk-11-jre | apt-get install -y curl wget openjdk-11-jre\ | ||
openssh-client openssh-server | |||
systemctl daemon-reload | |||
systemctl restart sshd | |||
systemctl status sshd | |||
java -version | java -version | ||
EOF | EOF | ||
| Line 83: | Line 87: | ||
lxc exec robotics bash <<'EOF' | lxc exec robotics bash <<'EOF' | ||
sleep 5 | sleep 5 | ||
dnf install -y curl java-11-openjdk | dnf install -y curl wget java-11-openjdk\ | ||
openssh-client openssh-server | |||
systemctl daemon-reload | |||
systemctl restart sshd | |||
systemctl status sshd | |||
java -version | java -version | ||
EOF | EOF | ||
| Line 93: | Line 101: | ||
lxc exec software bash <<'EOF' | lxc exec software bash <<'EOF' | ||
sleep 5 | sleep 5 | ||
apt-get install -y curl openjdk-11-jre | apt-get install -y curl wget openjdk-11-jre\ | ||
openssh-client openssh-server | |||
systemctl daemon-reload | |||
systemctl restart sshd | |||
systemctl status sshd | |||
java -version | java -version | ||
EOF | EOF | ||
Revision as of 08:34, 30 December 2022
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:curl:java create alias from snapshot: lxc snapshot agronomy curl:java lxc publish agronomy/curl:java --alias\ debian/12:curl:java lxc delete agronomy launch alias: lxc launch debian/12:curl:java agronomy && lxc exec agronomy bash lxc stop agronomy && lxc delete agronomy |
create alias: lxc stop robotics lxc publish robotics --alias\ fedora/37:curl:java create alias from snapshot: lxc snapshot robotics curl:java lxc publish robotics/curl:java --alias\ fedora/37:curl:java lxc delete robotics launch alias: lxc launch fedora/37:curl:java robotics && lxc exec robotics bash lxc stop robotics && lxc delete robotics |
create alias: lxc stop software lxc publish software --alias\ ubuntu/22.04:curl:java create alias from snapshot: lxc snapshot software curl:java lxc publish software/curl:java --alias\ ubuntu/22.04:curl:java lxc delete software launch alias: lxc launch ubuntu/22.04:curl:java software && lxc exec software bash lxc stop software && lxc delete software |
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 | ||
|
| ||
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 $HADOOP_HOME/sbin/start-yarn.sh http://127.0.0.1:8088 | ||
|
| ||
sudo apt dist-upgrade sudo do-release-upgrade sudo apt --fix-broken install sudo apt install ubuntu-desktop |
[Service]
User=hadoop
Group=hadoop
Type=forking
SuccessExitStatus=143
| |
|
| ||
if [ -f '/etc/os-release' ];then
HOST_OS_ID=$(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
| ||