NOMERGE: Updates to Solr example

[crittermike]

This moves us from 2 containers for Solr down to 1.

Current problem is that the permissions changes in the Dockerfile don't seem to be doing the job, because when docker-compose up'ing, you get:

solr_1  | 1958 ERROR (coreLoadExecutor-6-thread-2) [   x:core01] o.a.s.c.SolrCore :java.nio.file.AccessDeniedException: /var/lib/solr/core01

Any thoughts on that? Or, is this approach just entirely wrong to begin with?

[grayside]

The image should already be exporting the port just fine.

[grayside]

The permission probably comes from this, based on how this is the major variation between what you have and what I've recently been using. This can inherit some directory level permissions of some sort from the source side.

Instead, we could define this as a named volume.

solr-data:/var/lib/solr

Then parallel to the services key:

volumes:
  # This data volume persists Solr storage.
  # The search service is using a customized Docker image to facilitate write
  # access to this volume.
  # An empty value indicates all settings are default.
  solr-data:

[grayside]

Marking this so status shows matching previous comments.

[febbraro]

Is this approach here still best practice? Do we need to roll in some of the updated suggested above, or do we need to approach solr completely differently? I'm aware our existing example is out of date, so we really need to get this ironed out for good guidance from our team.

[grayside]

@dnmurray was going to put together a solr image last we discussed this, then reduce the example here accordingly.