How to Install Apache SOLR 4.5 on CentOS 6.4

by Shay Anderson on October 2013Knowledge Base/Linux/How-to- Install Apache SOLR 4.5 on CentOS 6.4

In this tutorial I explain how to install the Apache SOLR 4.5 on CentOS 6.4. The examples below I am using the root user, if you is not your would need to prepend some of the examples with sudo .

Install Java

To start things off first check if you have a Java installed: If you don't have a # which java Java installed check for latest version : # yum list available | grep java and install Java, in my case it is: # yum install java-1.7.0-openjdk.x86_64 install Java-mysql DB connector:# yum install mysql-connector-java
Finally, check Java version:# java -version 
java version "1.7.0_25" 
OpenJDK Runtime Environment (rhel-2.3.10.4.el6_4-x86_64) 
OpenJDK 64-Bit Server VM (build 23.7-b01, mixed mode)

Install SOLR

Install the latest SOLR release by downloading from http://www.apache.org/dyn/closer.cgi/lucene/solr/. For example, I downloaded using:# wget http://apache.mirrors.tds.net/lucene/solr/4.5.0/solr-4.5.0.tgz /optExtract Download:# tar -xvf /opt/solr-4.5.0.tgzMove main directory for install:# mv -v /opt/solr-4.5.0 /opt/solrAnd move example directory to project name or simply core:# mv -v /opt/solr/example /opt/solr/core
Create a symlink to the Mysql-connector-java we installed earlier:# ln -s /usr/share/java/mysql-connector-java.jar /opt/solr/dist/mysql-connector-java.jarThen edit The/opt/solr/core/solr/collection1/conf/solrconfig.xml file and add these lines by the <lib dir= "..." > Li NES for using MySQL database connection and Data Import Handler (DIH):<!-- data import handler --> 
<lib dir="../../../contrib/dataimporthandler/lib/" regex=".*\.jar" /> 
<lib dir="../../../dist/" regex="solr-dataimporthandler-\d.*\.jar" /> 
<lib dir="../../../dist/" regex="mysql-connector-java.*\.jar" />

Firewall Exception

If iptables Add a rule to allow access to SOLR's admin section and query SOLR data (replace 0.0.0.0 with the Corre CT IP address): # iptables -A INPUT -s 0.0.0.0 -p tcp -m tcp --dport 8983 -j ACCEPT 
# service iptables save Or, if you want to allow port 8983 for all requests use: # iptables -A INPUT -p tcp -m tcp --dport 8983 -j ACCEPT 
# service iptables save Also, if you ' re using a MySQL database co Nnection for data importer you ll want to open a firewall exception for the localhost MySQL port:# iptables -A INPUT -s 127.0.0.1 -p tcp -m tcp --dport 3306 -j ACCEPT 
# service iptables save 
# iptables -L 
... 
ACCEPT tcp -- localhost anywhere tcp dpt:mysql 
...

Running SOLR

You should now is able to test running the SOLR server: # java -jar /opt/solr/core/start.jar If Everything works correctly you should being able to view the S OLR Server Admin by going to:
Http://[server hostname or ip]:8983/solr/#/

If this does don't work try viewing the Log/opt/solr/solr/logs/solr.log

You can view if SOLR are running with command:# lsof -i :8983

Auto Start Apache SOLR

Now we could want to configure Apache SOLR to auto start on server boot. First, create script for handling the SOLR Server service:# nano /etc/init.d/solrand add the following script (or one like it):#!/bin/sh
# chkconfig:2345 95 20
# DESCRIPTION:SOLR Server
# SOLR Server service start, stop, restart
# @author Shay Anderson 10.13

Solr_dir= "/opt/solr/core"
Java= "/usr/bin/java-dstop. Port=8079-dstop. Key=a09df7a0d-jar Start.jar "
Log_file= "/opt/solr/core/logs/solr-server.log"

Case $ in
Start
echo "Starting SOLR ..."
CD $SOLR _dir
$JAVA 2> $LOG _file &
Sleep 3
;;
Stop
echo "Stopping SOLR ..."
Pkill-f Start.jar >/dev/null
Retval=$?
If [$RETVAL-eq 0]; Then
echo "Stopped"
Else
echo "Failed to stop"
Fi
;;
Restart
$ stop
Sleep 2
$ start
;;
*)
echo "Usage: $ [Start|stop|restart]"
Exit 1
;;
Esac

Exit 0Save the file and make it executable:# chmod +x /etc/init.d/solrNow register SOLR to run when server boots:# chkconfig --add solr 
# chkconfig --list | grep solr

How to Install Apache SOLR 4.5 on CentOS 6.4