External Solr

Supported Solr Versions

Install Solr

Refer to the Solr documentation for instructions on setting up Solr on your server.

You will download the Solr package and extract it to a folder of your choosing. Do not start Solr until you have added the ArchivesSpace configuration files.

We strongly recommend a standalone mode installation. No support will be provided for Solr Cloud deployments specifically (i.e. we cannot help troubleshoot Zookeeper).

Create a configset

Before running Solr you will need to setup a configset.

Linux

Using the command line:

mkdir -p /$path/$to/$solr/server/solr/configsets/archivesspace/conf

Be sure to replace /$path/$to/$solr with your actual Solr location, which might be something like:

mkdir -p /opt/solr/server/solr/configsets/archivesspace/conf

Windows

Right click on your Solr directory and open in Windows Terminal (Powershell).

mkdir -p .\server\solr\configsets\archivesspace\conf

You should see something like this in response:

Directory: C:\Users\archivesspace\Projects\solr-8.10.1\server\solr\configsets\archivesspace
Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
d-----        10/25/2021  12:15 PM                conf

Copy the ArchivesSpace Solr configuration files from the solr directory included with the release into the $SOLR_HOME/server/solr/configsets/archivesspace/conf directory.

There should be four files:

schema.xml
solrconfig.xml
stopwords.txt
synonyms.txt

ls .\server\solr\configsets\archivesspace\conf\

Directory: C:\Users\archivesspace\Projects\solr-8.10.1\server\solr\configsets\archivesspace\conf

Mode                 LastWriteTime         Length Name
----                 -------------         ------ ----
-a----        10/25/2021  12:18 PM          18291 schema.xml
-a----        10/25/2021  12:18 PM           3046 solrconfig.xml
-a----        10/25/2021  12:18 PM              0 stopwords.txt
-a----        10/25/2021  12:18 PM              0 synonyms.txt

Note: your exact output may be slightly different.

Setup the environment

From Solr v9 ArchivesSpace requires the use of Solr modules. We recommend using the environment variable option to specify the modules to use:

SOLR_MODULES=analysis-extras

This environment variable needs to be available to the Solr instance at runtime.

For instructions on how set an environment variable here are some recommended articles:

Setup a Solr core

With the configset in place run the command to create an ArchivesSpace core:

bin/solr start

Wait for Solr to start (running as a non-admin user):

.\bin\solr start
"java version info is 11.0.12"
"Extracted major version is 11"
OpenJDK 64-Bit Server VM warning: JVM cannot use large page memory because it does not have enough privilege to lock pages in memory.
Waiting up to 30 to see Solr running on port 8983
Started Solr server on port 8983. Happy searching!

You can check that Solr is running on http://localhost:8983.

Now create the core:

bin/solr create -c archivesspace -d archivesspace

You should see confirmation:

"java version info is 11.0.12"
"Extracted major version is 11"

Created new core 'archivesspace'

In the browser you should be able to access the ArchivesSpace schema.

Disable the embedded server Solr instance (optional <= 3.1.1 only)

Edit the ArchivesSpace config.rb file:

AppConfig[:enable_solr] = false

Note that doing this means that you will have to backup Solr manually.

Set the Solr url in your config.rb file

This config setting should point to your Solr instance:

AppConfig[:solr_url] = "http://localhost:8983/solr/archivesspace"

If you are not running ArchivesSpace and Solr on the same server, update localhost to your Solr address.

By default, on startup, ArchivesSpace will check that the Solr configuration appears to be correct and will raise an error if not. You can disable this check by setting AppConfig[:solr_verify_checksums] = false in config.rb.

Please note: if you’re upgrading an existing installation of ArchivesSpace to use an external Solr, you will need to trigger a full re-index. See Indexes for more details.

You can now follow the instructions in the Getting started section to start your ArchivesSpace application.

Upgrading Solr

If you are using an older version of Solr than is recommended you may need (if called out in release notes) or want to upgrade. Before performing an upgrade it is recommended that you review:

You should also review this document as the installation steps may include instructions that were not present in the past. For example, from Solr v9 there is a requirement to use Solr modules with instructions to configure the modules using environment variables.

The crucial part will be ensuring that ArchivesSpace’s schema is being used for the ArchivesSpace Solr index. The config setting AppConfig[:solr_verify_checksums] = true will perform a check on startup that confirms this is the case, otherwise ArchivesSpace will not be able to start up.

From ArchivesSpace 3.5+ AppConfig[:solr_verify_checksums] does not check the solrconfig.xml file. Therefore you can make changes to it without ArchivesSpace failing on startup. However, for an upgrade you will want to at least compare the ArchivesSpace solrconfig.xml to the one that is in use in case there are changes that need to be made to work with the upgraded-to version of Solr. For example the ArchivesSpace Solr v8 solrconfig.xml will not work as is with Solr v9.

After upgrading Solr you should trigger a full re-index. Instructions for this are in Indexes.