# Modules

> This section lists the available feature modules within Pigsty, and future planning modules
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##  Core Modules

Pigsty offers four <span class="text-primary"><b>CORE</b></span> modules, which are essential for providing PostgreSQL service:

- [**`PGSQL`**](/docs/pgsql) : An autonomous, highly available PostgreSQL cluster powered by Patroni, Pgbouncer, HAproxy, PgBackrest, and others.
- [**`INFRA`**](/docs/infra) : Local software repository, Prometheus, Grafana, Loki, AlertManager, PushGateway, Blackbox Exporter, etc.
- [**`NODE`**](/docs/node)   : Adjusts the node to the desired state, name, time zone, NTP, ssh, sudo, haproxy, docker, promtail, keepalived.
- [**`ETCD`**](/docs/etcd)   : Distributed key-value store, serving as the DCS (Distributed Consensus System) for the highly available Postgres cluster: consensus leadership election, configuration management, service discovery.


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## Extended Modules

Pigsty offers four <span class="text-secondary"><b>OPTIONAL</b></span> modules,which are not necessary for the core functionality but can enhance the capabilities of PostgreSQL:

* [**`MINIO`**](/docs/minio): S3-compatible simple object storage server, serving as an optional PostgreSQL database backup repository with production deployment support and monitoring.
* [**`REDIS`**](/docs/redis): Redis server, a high-performance data structure server supporting standalone master-slave, sentinel, and cluster mode production deployments, with comprehensive monitoring support.
* [**`MONGO`**](/docs/mongo): Native deployment support for FerertDB — adding MongoDB wire protocol level API compatibility to PostgreSQL!
* [**`DOCKER`**](/docs/node): Docker Daemon service, allowing users to easily deploy containerized stateless software tool templates, adding various functionalities.


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## Pilot Modules

Pigsty includes some pilot and planned functional modules. If you're interested, you may consider trying them out and providing us with suggestions and feedback:

- **`DUCK`**： Pigsty by default includes DuckDB in the offline software package, offering powerful standalone embedded analytics capabilities (Beta).
- **`CLOUD`**：Pigsty plans to use SealOS to provide out-of-the-box production-grade Kubernetes deployment and monitoring support (Beta).
- **`MYSQL`**：Pigsty is researching adding high-availability deployment support for MySQL as an optional extension feature (Alpha).
- **`GPSQL`**：Pigsty plans to support production-level deployment of Greenplum (Alpha).
- **`KAFKA`**：Pigsty plans to offer message queue support (Draft).


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## Docker Modules

Pigsty also provides some services that can be quickly deployed through the [**`DOCKER`**](/docs/docker/) module, such as various second-order "databases" that use PostgreSQL as the actual state storage:

- **`Supabase`**: An open-source alternative to Firebase based on PostgreSQL. Pigsty provides the necessary extensions in [**EL series operating systems**](/docs/reference/compatibility/#el-distribution-support) to allow you to quickly set up [**Supabase**](https://supabase.com/).
- **`FerretDB`**: An open-source MongoDB alternative based on PostgreSQL. You can quickly deploy containerized [**FerretDB**](https://www.ferretdb.io/) using Docker Compose.
- **`NocoDB`**: An open-source AirTable alternative based on PostgreSQL, offering low-code application development capabilities. If you need a Web Excel, consider using [**NocoDB**](https://nocodb.com/).
- **`Metabase`**: Enables quick in-database data analysis with a friendly web interface toolbox. When you need to explore data in PostgreSQL, consider using [**Metabase**](https://metabase.com/).


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### Monitoring Other Databases

Pigsty's [**`INFRA`**](/docs/infra/) module can be used independently as a plug-and-play monitoring infrastructure for other nodes or existing PostgreSQL databases:

- Existing PostgreSQL services: Pigsty can monitor external, non-Pigsty managed PostgreSQL services, still providing relatively complete monitoring support.
- **`RDS PG`**: Cloud vendor-provided PostgreSQL RDS services, treated as standard external Postgres instances for monitoring.
- **`PolarDB`**: Alibaba Cloud's cloud-native database, treated as an external PostgreSQL 11 / 14 instance for monitoring.
- **`KingBase`**: A trusted domestic database provided by People's University of China, treated as an external PostgreSQL 12 instance for monitoring.
- **`Greenplum`** / **`YMatrixDB`** monitoring, currently treated as horizontally partitioned PostgreSQL clusters for monitoring.

Moreover, Pigsty is planning to support monitoring other types of database systems:

- **`MySQL`**: Pigsty currently offers preliminary support for MySQL monitoring (Alpha).
- **`Kafka`**: Pigsty plans to provide monitoring support for Kafka (planned).
- **`MongoDB`**: Pigsty plans to provide monitoring support for MongoDB (planned).