Two sites sharing a single Solr core possible?

[gitressa]

Has anyone managed to get Drupal 8 Search API Solr multisite feature, sharing a single Solr core, running in Lando? Just to be clear, this is not a Drupal multisite installation, but two separate web sites, sharing a single Solr core, to be able to index and search in both sites, on either web site.

I am fine with both these scenarios, whichever is easier to set up:

• The two sites in the same Lando instance, like in How do i get two databases into a single DB service? lando#2355
• Two Separate Lando instances, somehow sharing the same Solr core

[gitressa]

I am glad to see a milestone have been added 👍

It seems to almost work, though I am not sure if Lando, Drupal or Solr is the issue ... I have created two individual Lando instances, which share a single Solr core. They can connect and index to this core, when they are both running, or individually.

From web site A (218 nodes) search index admin page:

218/218 indexed
...
Server index status   There are 431 items indexed on the server for this index.

I get suggestions (using the Search API Autocomplete module) from Solr indexed content from both web sites.

Before clearing all indexed data (218/218 indexed), number of indexed words getting suggested in an autocomplete enabled search field:

• technical 53
• referrals 27

The search result will show link to nodes of current web site A, links to web site B are missing.

After clearing all indexed data (0/218 indexed), numbers of hits are reduced, as expected:

• technical 20
• referrals 19

The search result now shows no links at all, also as expected. From the logs of web site A:
Drupal\search_api\SearchApiException: The datasource with ID '2xkmvb--entity:node' could not be retrieved for index 'Search index'. in Drupal\search_api\Entity\Index->getDatasource() (line 369 of /app/web/modules/contrib/search_api/src/Entity/Index.php).

Web site B logs are all about The datasource with ID '31hyfe--entity:node' ....

Also, it seems like the Solr core from the Lando instance which was started first comes first in the alphabet is receiving the indexed data, if that makes sense. So, if only web site B is running, its Solr core will be indexed to. But as soon as web site A is started, it will take over, from both web site A and B.

Web site A
http://admin.websitea.lndo.site/solr/#/absearch/core-overview
Num Docs: 431

Web site B
http://admin.websiteb.lndo.site/solr/#/absearch/core-overview
Num Docs: 0

[stale]

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[gitressa]

Thanks Stalebot, but this issue is still relevant.