CentOS: Install Solr with Tomcat6


Although this method seems to “just work”, it is not to be considered “the right way” to install Solr or be used as-is in production deployments.

Anyways, it should probably work just fine for development environments.

Multiple Solr versions

In my case, I needed to install two Solr versions (1.4 and 4.6) on the same machine, each one with multiple cores.

To accomplish that, I separated all the configuration / data directories by prefixing them wiht the version number.

Downloading tarballs

For example

(use mirrors close to you!)

mkdir -p /opt/solr
cd /opt/solr

wget http://archive.apache.org/dist/lucene/solr/1.4.1/apache-solr-1.4.1.tgz
tar xzvf apache-solr-1.4.1.tgz
ln -s apache-solr-1.4.1 1.4

wget http://mirror.nohup.it/apache/lucene/solr/4.6.1/solr-4.6.1.tgz
tar xzvf solr-4.6.1.tgz
ln -s solr-4.6.1 4.6

Create Solr configuration

VERSIONS="1.4 4.6"

mkdir -f /etc/solr
for version in $VERSIONS; do
    # Prepare directories to hold configuration and data
    mkdir -fp /usr/share/solr/${version}
    mkdir -fp /var/lib/solr/${version}/data

    # This directory should hold the data (although, apparently,
    # data gets actually stored in /usr/share/solr/..../data)
    chown -R tomcat:tomcat /var/lib/solr/${version}/

    # Apparently there are things looking for configuration
    # in /etc/ too -- better symlink!
    ln -s /usr/share/solr/${version} /etc/solr/${version}

    # Let's copy example configuration for multicore solr
    cp -r /opt/solr/${version}/example/multicore/* /usr/share/solr/${version}

Install Solr applications in Tomcat

ln -s /opt/solr/1.4/dist/apache-solr-1.4.1.war /usr/share/tomcat6/webapps/solr-1.4.war
ln -s /opt/solr/4.6/dist/solr-4.6.1.war /usr/share/tomcat6/webapps/solr-4.6.war

And create appropriate configuration files:


<Context docBase="/usr/share/tomcat6/webapps/solr-1.4.war" debug="0" privileged="true" allowLinking="true" crossContext="true">
  <Environment name="solr/home" type="java.lang.String" value="/usr/share/solr/1.4" override="true" />


<Context docBase="/usr/share/tomcat6/webapps/solr-4.6.war" debug="0" privileged="true" allowLinking="true" crossContext="true">
  <Environment name="solr/home" type="java.lang.String" value="/usr/share/solr/4.6" override="true" />

Testing installation

Restart tomcat:

service tomcat6 restart

Check whether applications are there and do not display errors:

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