Configure Apache Solr with Tomcat
At many times Drupal Architects prefer to go with Apache Solr instead of Drupal core search. I am no outlander to this scenario, but this time it was a new requirement. By default the Apache Solr relies on Jetty server to index and retrive items during the search. My need was to use Tomcat server in the place of Jetty. The first glance proved it was an easy task, but latter the tough fight started.
Initially I had the reference from many sites about how to integrate Apache solr with Tomcat. Alas, none had the elucidation to provide a end to end solution. Hence I would like to write one on my own.
Downloading and Starting Tomcat
Step 1: Download the Apache Tomcat Server from its official site. I would insist you to do this rather than installing via packet manager.
Step 2: Extract the folder in the
/usr/share/. On multi site environment this would help to run the tomcat as a single instance.
Step 3: Now get into the Tomcat folder and see for bin folder. Ensure that you have a bin folder there. If you don't find bin it implies that you are in the wrong directory.
Step 4: Now cd into bin folder, and issue
$sudo -E ./Startup.sh , this command will start the tomcat server.
-E gets the Java Environment.
If you are prompted with a message as below, it concludes the proper start of the Tomcat.
Using CATALINA_BASE: /usr/share/tomcat7Using CATALINA_HOME: /usr/share/tomcat7Using CATALINA_TMPDIR: /usr/share/tomcat7/tempUsing JRE_HOME: /usr/lib/jvm/javaUsing CLASSPATH: /usr/share/tomcat7/bin/bootstrap.jar:/usr/share/tomcat7/bin/tomcat-juli.jar
JAVA_HOME or JRE_HOME not being defined" then you need to do
$ sudo export JAVA_HOME=/usr/lib/jvm/java
Configuring Tomcat with Apache Solr
Managing Tomcat7 application
sudo cp -R apache-solr/example/solr/ /usr/share/tomcat7/solr/sudo nano /etc/tomcat7/Catalina/localhost/solr.xmland paste<tomcat-users><role rolename="admin"/><role rolename="manager"/><user username="username" password="password" roles="admin,manager"/></tomcat-users>
Linking Drupal 7 with a running Apache Solr
sudo cp apachesolr/schema.xml /usr/share/tomcat7/solr/conf/schema.xml
sudo cp apachesolr/solrconfig.xml /usr/share/tomcat7/solr/conf/solrconfig.xml
sudo cp apachesolr/elevate.xml /usr/share/tomcat7/solr/conf/elevate.xml
Checking and Troubleshooting
Now set the port as 8080 in the apache solr configuration page ie: http://localhost:8080 and test the connection. If you are prompted with no errors, it implies the successfull integration of tomcat with solr.
If not please check the permissions and to be in the best case use the below mentioned one
sudo chown -R tomcat7:root /usr/share/tomcat7/solr/
Note: You can make use of this blog also with Drupal 6+, Apache solr 1.3+ and Tomat 6+