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Added instructions on using multiple cores to README #39

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Added instructions on using multiple cores to README #39

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Added instructions on using multiple cores
nicrodgers Apr 4, 2024
4948cc4
Rewrote instructions on multiple cores to use solr_extra.yaml
nicrodgers Apr 5, 2024
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Expand Up @@ -70,6 +70,38 @@ services:

You can delete the "dev" core from `http://<projectname>.ddev.site:8983/solr/#/~cores/dev` by clicking "Unload".

## Multiple Solr Cores

If you would like to use more than one Solr core, you'll need to edit the file [`.ddev/docker-compose.solr.yaml`](docker-compose.solr.yaml)
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Rather than editing, which orphans the add-on, use a docker-compose.solr_extra.yaml

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Thanks for the feedback - i've updated the instructions accordingly


1. Define a mount point for each core you require. By default, a mount point is created mounting the config in .ddev/solr into the container as solr-conf. Find the section under volumes, and add new mount points for each core, for example:
```yml
services:
solr:
volumes:
- ./solr:/solr-conf
- ./core2:/core2-conf
- ./core3:/core3-conf
```

2. Create the directories for your new cores' config, and copy the desired solr config in to it, eg:
`cp -R .ddev/solr .ddev/core2`

`cp -R .ddev/solr .ddev/core3`

`cp -R path/to/core2-config/* .ddev/core2/conf/`

`cp -R path/to/core3-config/* .ddev/core3/conf/`

4. Change the 'entrypoint' value to use `precreate-core` instead of `solr-precreate` and add the additional cores, along with a command to start solr afterwards:
```yml
services:
solr:
entrypoint: 'bash -c "VERBOSE=yes docker-entrypoint.sh precreate-core solrconf /solr-conf ; precreate-core core2 /core2-conf ; precreate-core core3 /core3-conf ; exec solr -f "'
```

5. Finally, `ddev restart` to pick up the changes and create the new cores.

## Caveats

* This recipe won't work with versions of Solr before `solr:8`, and Acquia's hosting [requires Solr 7](https://docs.acquia.com/acquia-search/). You'll want to see the [contributed recipes](https://github.com/ddev/ddev-contrib) for older versions of Solr.