Allow configuration of indexConfig/lockType in solrconfig.xml

[ssciolla]

Expected Behavior

It should be possible to tweak the indexConfig/lockType in solr/solrconfig.xml using a substitution variable, as described in the Solr docs for the supported 8.10 version.

Current Behavior

The provided solrconfig.xml does not have indexConfig or lockType elements at all, so it's not possible to change this configuration without changing the solrconfig.xml file itself. This is possible, but it would be nice to not have our configuration diverge from what ships with ArchivesSpace releases.

Possible Solution

Simply add the following under config in solrconfig.xml:

  <indexConfig>
    <lockType>${solr.lock.type:native}</lockType>
  </indexConfig>

Adding a substitution variable would enable this to be changed via the SOLR_OPTS environment variable, without modifying the default of native.

Context

We have a use case in our Kubernetes deployment environment that requires the single lockType option to prevent Solr from being left in a bad state when a container exits improperly. Since we're pulling in a pre-built release of ArchivesSpace, we currently have to modify (using xmlstarlet) solrconfig.xml to include the proper settings.

Your Environment

• Version used: 3.4.1
• Link to your project: https://github.com/mlibrary/aspace-containerization/tree/main