# Solr

Solr is the popular, blazing-fast, open source enterprise search platform built on Apache Lucene. It is open source and self-hosted, installable on Docker Hub, Kubernetes (Helm) and Unraid.

Canonical page: https://ourlocalhost.com/app/443/solr

## Description

Solr is the popular, blazing-fast, open source enterprise search platform built on Apache Lucene.

## Platform availability

Available on 2 of 9 platforms: Unraid, Helm.

## Health score

67/100 (Good), based on 4 of 4 factors.
- Maintained: 100 (last commit 17 days ago)
- Popular: 65 (1,683 GitHub stars)
- Easy to install: 45 (2 install platforms, install notes, Docker image)
- Light to run: 10 (8 GB minimum RAM)

## Links

- GitHub: https://github.com/apache/solr
- Docker Hub: https://hub.docker.com/r/bitnami/solr/
- Kubernetes (Helm): https://artifacthub.io/packages/helm/apache-solr/solr
- Unraid: https://ca.unraid.net/apps/solr-01cp1ej027f013?q=solr
- Official website: https://lucene.apache.org/solr/

## Common questions

### What Docker data folder setup prevents Solr index permission problems?

Create a local folder such as ~/solrdata, set its group ID to 8983, and add it to Docker's allowed volumes if your Docker Desktop setup requires it. This helps prevent permission errors that can stop Solr from saving the index or starting.

### Does Solr require explicit schema definitions for fields?

Yes, you need to declare each field type and set schemas in Solr.

### What configuration areas are important when running Solr in production?

Production Solr requires care with JVM heap sizing and GC tuning, as well as master/replica replication setup. Getting these wrong can cause Solr to fall over under load.

### Where can self-hosters get support for Solr?

You can ask for help in the users mailing list, the Solr Community Slack channel, or the #solr IRC channel.

### Are there current security notices for Solr?

The Solr site notes recent security announcements and points to the security page for details.

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Source: Our Local Host (https://ourlocalhost.com/app/443/solr), the self-hosted and open-source app directory.