## Set up Private Service Connect to AlloyDB

URL: https://docs.atlan.com/apps/connectors/database/alloydb/postgresql/how-tos/set-up-private-service-connect-to-alloydb

> Let Atlan's SaaS reach your AlloyDB for PostgreSQL privately over Google's internal network - no public IP, nothing deployed on your side beyond a service attachment.

Let Atlan's SaaS reach your AlloyDB privately over Google's internal network - no public IP, nothing deployed on your side beyond a service attachment. Five phases, including the handshake with Atlan support where most setups stall.

> **Note: New to PSC?**
>
>
> Read [How AlloyDB connectivity works](https://docs.atlan.com/llms/connectors/alloydb-postgresql/how-alloydb-connectivity-works/llms.txt) first. The socket (service attachment) and plug (consumer endpoint) model below is introduced there.
>

> **Caution: This flow is support-assisted**
>
>
> Unlike the other two paths, PSC to AlloyDB is currently **not self-serve** - Atlan's network team builds the consumer endpoint and DNS mapping for you. Every step below owned by Atlan support happens on your support ticket. Budget 2–5 business days end to end.
>

## Prerequisites

- An AlloyDB instance with **Private Service Connect enabled**. PSC is chosen at instance level; your cloud team may need to create or update the instance with PSC connectivity.
- Someone with permissions to manage the AlloyDB instance and PSC settings in your Google Cloud project.
- A hostname you want Atlan to use for this database (e.g. `alloydb-prod.example-corp.internal`) - optional but strongly recommended, see Phase 2.

## Five phases at glance

| Phase | What happens | Owner | Typical time |
|---|---|---|---|
| 1. Expose | Enable PSC on the instance; get the Service Attachment URL | Your cloud/network team | 1–2 hours |
| 2. Request | Open a support ticket with the exact attachment URL + desired hostname | Atlan User | 15 minutes |
| 3. Build | Atlan creates the consumer endpoint and maps the hostname | Atlan support | 1–2 business days |
| 4. Accept & verify wiring | Confirm the endpoint shows **Accepted** on your service attachment | Your cloud/network team | 15 minutes |
| 5. Connect & verify | Point the Atlan crawler at the hostname; test | Atlan User | 30 minutes |

## Phase 1 - Expose instance over PSC

**Owner:** Your cloud/network team

Enable Private Service Connect on the AlloyDB instance and copy the **Service Attachment URL** from the instance's connectivity details. It looks like:

```
projects/<google-managed-project>/regions/<region>/serviceAttachments/<attachment-name>

# e.g. projects/x1234example-tp/regions/europe-west1/serviceAttachments/alloydb-abc123-example-sa

```

> **Danger: The most common mistake: sharing the wrong URL**
>
>
> The service attachment URL is **not** the instance URI. Setups stall when the instance path (`projects/…/locations/…/clusters/…/instances/…`) is shared instead of the attachment path (`projects/…/regions/…/serviceAttachments/…`). If your URL contains `/locations/` and `/clusters/`, it's the wrong one - Atlan cannot build an endpoint against it, and you lose a full round-trip finding out.
>

## Phase 2 - Raise support request

**Owner:** Atlan User

Open a [support request](https://docs.atlan.com/llms/platform/submit-request/submit-request/llms.txt) from within Atlan containing:

- Your **Atlan tenant URL**
- The exact **Service Attachment URL** from Phase 1 (copy-paste, don't retype)
- The **hostname** you want mapped (e.g. `alloydb-prod.example-corp.internal`). If you skip this, Atlan will ask - providing it up front saves a day. A stable hostname means you never reconfigure the crawler if the underlying endpoint IP changes.
- The AlloyDB **region**, and whether you'll authenticate with a password or IAM

## Phase 3 - Atlan builds consumer endpoint

**Owner:** Atlan support

Atlan's team creates a PSC consumer endpoint in the tenant's network targeting your service attachment, assigns it a private IP, and maps your hostname to that IP. Here's the full lifecycle:

1. **Requested** - you share the attachment URL (Phase 2)
2. **Pending** - endpoint created, awaiting acceptance by your attachment
3. **Accepted** - traffic can flow over the private path
4. **Usable** - hostname resolves; proceed to Phase 5

Support replies on the ticket with confirmation and the hostname to use in the crawler.

## Phase 4 - Accept and verify wiring

**Owner:** Your cloud/network team

- If your service attachment uses an **accept list** (rather than auto-accept), add the consumer project Atlan names on the ticket, then confirm the connection shows **Accepted** in the attachment's *Connected endpoints*.
- A second failure mode here: the endpoint exists but the **hostname was mapped to the wrong IP** on Atlan's side. If the test in Phase 5 times out even though the endpoint is Accepted, ask on the ticket: *"please re-verify the DNS mapping for our hostname against the endpoint IP"*.

## Phase 5 - Connect and verify

**Owner:** Atlan User

1. In **New workflow → AlloyDB Assets**, keep **Direct** extraction selected.
2. Enter the **hostname from Phase 3** as Host (not the private IP, not the public URL), port `5432`.
3. Enter credentials and click **Test connection**.

### Success checklist

- Endpoint shows **Accepted** on your service attachment
- **Test connection** passes using the mapped hostname
- Preflight checks pass
- A full crawl completes

> **Info: One endpoint per instance**
>
>
> A PSC endpoint targets exactly one service attachment, which targets one AlloyDB instance. Connecting several instances means repeating Phases 1–5 per instance - put them all in **one ticket**, clearly labeled. See [Special cases](https://docs.atlan.com/llms/connectors/alloydb-postgresql/special-cases/llms.txt).
>

## Next steps

[Crawl AlloyDB for PostgreSQL](https://docs.atlan.com/llms/connectors/alloydb-postgresql/crawl-alloydb-postgresql/llms.txt): Configure and run the crawler to extract metadata from AlloyDB

_Last updated: 27 August 2026._

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