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Add note about reduced ES permissions with prefixes #1816

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6 changes: 6 additions & 0 deletions content/en/admin/elasticsearch.md
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Expand Up @@ -147,6 +147,12 @@ ES_PASS=l0ng-r4nd0m-p@ssw0rd

You are all set, and your Elasticsearch server should be much more secure!

#### Reduced permissions in shared environments

If you are running in a shared environment with multiple consumers of the same ES server (Mastodon installs, other apps, etc), in addition to using `ES_PREFIX` as described above to isolate the generated search indexes, you can also provide more limited access to the role you create.

For example, changing `"names": ["*"]` to `"names": ["app_prefix_*"]` (where `app_prefix` matches the value you are using as an index prefix) will limit the access of the users with that role to operate only on the appropriate indices.

### Populate the indices

After saving the new configuration, restart Mastodon processes for it to take effect:
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