Solr 8.1 Installation Steps

Official Site : https://lucene.apache.org/solr/

Service Installation Script

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bin/install_solr_service.sh

Service installation script helps you to install solr as a service.

Note : Currently, the script only supports CentOS, Debian, Red Hat, SUSE and Ubuntu Linux distributions

Planning Your Directory Structure

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Recommended to use seperate directory for storing solr index files and logs.

Solr Installation Directory

By default, the service installation script will extract the distribution archive into /opt Dir.

Create the Solr User

Running Solr as root is not recommended for security reasons.

By default, the installation script will create the solr user, but you can override this setting using the -u option

Installing Solr

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• Download the required Solr version from its official site or mirrors.

  wget https://archive.apache.org/dist/lucene/solr/8.1.0/solr-8.1.0.tgz

• Extract the downloaded tar file.

  tar xzf solr-8.1.0.tgz solr-8.1.0/bin/install_solr_service.sh --strip-components=2

• Run the installation script.

  sudo bash ./install_solr_service.sh solr-8.1.0.tgz -i /opt/workshop/solr -d /var/solr -u solr -s solr -p 8080

  -i : solr installation Dir.

  -d : solr data directory.

  -u : username.

  -s : solr service name

  -p : solr port.

SolrCloud

It is a distributed architecture focused on horizontal scaling where multiple nodes run instance of solr that communicate with each other through zookeeper.

Setup Zookeper

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ZooKeeper is a centralized service for maintaining configuration information, naming, providing distributed synchronization, and providing group services.

• Download the required zookeper from its official site or mirrors.

  wget https://www.apache.org/dist/zookeeper/zookeeper-3.4.14/zookeeper-3.4.14.tar.gz

• Extract the downloaded tar file.

  tar -xvzf zookeeper-3.4.14.tar.gz

• Create Zookeper config file.

  cd zookeeper-3.4.14/conf

  cp zoo_sample.cfg zoo.cfg

• Open zoo.cfg and add the server configurations

  dataDir=/tmp/zookeeper
  
  clientPort=2181
  
  server.1=localhost:2888:3888
  

• Start zookeeper

  bin/zkServer.sh start

• To Check zookeper status

  bin/zkServer.sh status

Configuring Solr

• Open the solr env file

  sudo vi /etc/default/solr.in.sh

  ZK_HOST="127.0.0.1:2181"
  
  ZK_CLIENT_TIMEOUT="15000"
  
  SOLR_HOST="127.0.0.1"
  
  SOLR_PID_DIR="/var/solr"
  
  SOLR_HOME="/var/solr/data"
  
  LOG4J_PROPS="/var/solr/log4j2.xml"
  
  SOLR_LOGS_DIR="/var/solr/logs"
  
  SOLR_PORT="8080"
  

• Restart solr

  sudo service solr restart

Create films collection

sudo -u solr /opt/workshop/solr/solr/bin/solr create -c films -shards 1 -replicationFactor 2

Index sample data

/opt/workshop/solr/solr/bin/post -c films /opt/workshop/solr/solr/example/films/films.json -p 8080