| [PgBouncer](https://docs.gitlab.com/ee/development/architecture.html#pgbouncer) | Database Pool Manager | [Link](pgbouncer.md) |
| [Redis](https://docs.gitlab.com/ee/development/architecture.html#redis)[^3] with Redis Sentinel | Key/Value store for shared data with HA watcher service | [Link](redis.md) |
| [Load Balancer(s)](load_balancer.md)[^6] | Handles load balancing for the GitLab nodes where required. | [Load balancer HA configuration](load_balancer.md) |
| [Consul](https://docs.gitlab.com/ee/development/architecture.html#consul)[^3] | Service discovery and health checks/failover | [Consul HA configuration](consul.md) |
| [PostgreSQL](https://docs.gitlab.com/ee/development/architecture.html#postgresql) | Database | [Database HA configuration](database.md) |
| [PgBouncer](https://docs.gitlab.com/ee/development/architecture.html#pgbouncer) | Database Pool Manager | [PgBouncer HA configuration](pgbouncer.md) |
| [Redis](https://docs.gitlab.com/ee/development/architecture.html#redis)[^3] with Redis Sentinel | Key/Value store for shared data with HA watcher service | [Redis HA configuration](redis.md) |
| [Gitaly](https://docs.gitlab.com/ee/development/architecture.html#gitaly)[^2][^5] [^7] | Recommended high-level storage for Git repository data. | [Gitaly HA configuration](gitaly.md) |
| [Sidekiq](https://docs.gitlab.com/ee/development/architecture.html#sidekiq) | Asynchronous/Background jobs | |
| [Cloud Object Storage service](object_storage.md)[^4] | Recommended store for shared data objects such as LFS, Uploads, Artifacts, etc... | [Link](object_storage.md) |
| [NFS](nfs.md)[^5][^7] | Shared disk storage service. Can be used as an alternative for Gitaly or Object Storage. Required for GitLab Pages. | [Link](nfs.md) |
| [Cloud Object Storage service](object_storage.md)[^4] | Recommended store for shared data objects such as LFS, Uploads, Artifacts, etc... | [Cloud Object Storage configuration](object_storage.md) |
| [NFS](nfs.md)[^5][^7] | Shared disk storage service. Can be used as an alternative for Gitaly or Object Storage. Required for GitLab Pages. | [NFS configuration](nfs.md) |
| [Prometheus](https://docs.gitlab.com/ee/development/architecture.html#prometheus) and [Grafana](https://docs.gitlab.com/ee/development/architecture.html#grafana) | GitLab environment monitoring | [Monitoring node for scaling/HA](monitoring_node.md) |
In some cases, components can be combined on the same nodes to reduce complexity as well.