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3 changes: 3 additions & 0 deletions docs/prerequisites/index.md
Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,9 @@ Before installing the Control Plane, you must:

- Create a set of Linux hosts where you want to deploy Postgres instances; if you are deploying Control Plane on your localhost, see the [Quickstart Guide](../installation/quickstart.md):
- Hosts should have a stable IP address or hostname from which they can access each other.
- The Control Plane supports IPv6 addresses only with the
[systemd orchestrator](../installation/systemd-installation.md);
the Docker Swarm orchestrator does not currently support pure IPv6.
- If using the [Docker Swarm orchestrator](../installation/swarm-installation.md), hosts should have Docker installed by following the [Docker installation guide](https://docs.docker.com/engine/install/) for your operating system. Docker is not required for the [systemd orchestrator](../installation/systemd-installation.md).
- Create a volume on each host with enough space for your databases:
- This volume will be used to store configuration and data files for the
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