## AlloyDB for PostgreSQL assets app

URL: https://docs.atlan.com/apps/connectors/database/alloydb/postgresql/sdk/references/app-reference

> Learn how to crawl AlloyDB for PostgreSQL assets and publish them to Atlan for discovery.

# AlloyDB for PostgreSQL assets app

The AlloyDB for PostgreSQL assets app crawls AlloyDB databases, schemas, tables,
views, and columns and publishes them to Atlan. Build it with the
`AtlanAlloydbPostgres` builder, which mirrors the "new app" wizard:
**Credential → Connection → Metadata**.

> **Warning: Creating an app creates a new connection**
>
> Each create mints a **new** connection and new assets. To re-crawl, re-run the
> **existing** workflow (see
> [Re-run an existing app](https://docs.atlan.com/llms/platform/python/manage-apps/llms.txt)).

AlloyDB for PostgreSQL supports three authentication methods: **basic**
(username/password), **IAM user**, and **IAM service account**. The port is
optional and defaults to `5432`.

## Basic authentication

### Python

```python showLineNumbers title="AlloyDB for PostgreSQL crawling with basic auth"
from pyatlan.client.atlan import AtlanClient
from pyatlan.model.apps import AtlanAlloydbPostgres

client = AtlanClient()

response = (
 AtlanAlloydbPostgres(client)
 .basic( # (1)
 username="atlan_user", # (2)
 password="••••••", # (3)
 host="203.0.113.10", # (4)
 database="postgres", # (5)
 )
 .connection( # (6)
 name="production-alloydb",
 admin_roles=[client.role_cache.get_id_for_name("$admin")],
 )
 .include_metadata({"postgres": ["analytics", "sales"]}) # (7)
 .run(name="alloydb-prod") # (8)
)
print(response.slug, response.run_id)
```

1. **Step 1—Credential.** Username/password auth; the secret is vaulted.
2. **Required.** Database username.
3. **Required.** Password.
4. **Required.** The IP address or hostname exposed for the AlloyDB instance. The
 port (`port=`) is optional and defaults to `5432`.
5. **Required.** Database to connect to.
6. **Step 2—Connection.** Display name + at least one admin.
7. **Step 3—Metadata.** Schemas to crawl, as `{database: [schema, ...]}`. Omit
 to crawl everything. Exclude takes priority over include.
8. `.run(name=...)` creates **and** submits a run; use `.create(name=...)` to
 create without running.

## IAM authentication

For the IAM methods, `name` is the instance's **connection URI** from the AlloyDB
instance overview
(`projects/<project>/locations/<region>/clusters/<cluster>/instances/<instance>`).
The IAM identity must also exist as a database user on the instance.

### Python

```python showLineNumbers title="AlloyDB for PostgreSQL with IAM auth"

# IAM user

AtlanAlloydbPostgres(client).iam_user(
 username="analyst@example.com", # (1)
 password="ya29.••••••", # (2)
 name="projects/my-project/locations/us-central1/clusters/my-cluster/instances/my-instance", # (3)
 database="postgres",
)

# IAM service account

AtlanAlloydbPostgres(client).iam_service_account(
 username="atlan-crawler@my-project.iam", # (4)
 password="••••••", # (5)
 name="projects/my-project/locations/us-central1/clusters/my-cluster/instances/my-instance",
 gcp_service_account='{"type": "service_account", ...}', # (6)
 database="postgres",
)
```

1. **Required.** The IAM user's email address, without a trailing
 `.gserviceaccount.com`.
2. **Required.** A short-lived access token for that user
 (`gcloud auth print-access-token --account=<iam-user>`). It expires in about
 an hour, so prefer a service account for scheduled workflows.
3. **Required.** The instance connection URI.
4. **Required.** The service account's email address, without a trailing
 `.gserviceaccount.com`.
5. **Required.** The password field of the IAM service account form.
6. *Optional.* The service account's JSON key, as a string. Omit it for keyless
 setups where the environment can obtain access tokens.

## Configuration options

All metadata options are **optional**—set only what you need:

### Python

```python showLineNumbers title="AlloyDB for PostgreSQL metadata configuration"
(
 AtlanAlloydbPostgres(client)
 .basic(username="atlan_user", password="••••••", host="...", database="postgres")
 .connection(name="production-alloydb", admin_roles=[...])
 .include_metadata({"postgres": ["analytics"]}) # (1)
 .exclude_metadata({"postgres": ["staging"]}) # (2)
 .exclude_regex_for_tables_views(".*_TMP|.*_TEMP|TMP.*|TEMP.*") # (3)
 .redact_sql_text(True) # (4)
 .cloud_provider("AWS") # (5)
 .run(name="alloydb-prod")
)
```

1. Databases/schemas to include, as `{database: [schema, ...]}`.
2. Databases/schemas to exclude—exclude takes priority over include.
3. Regex of tables/views to ignore.
4. Replace literal values in extracted view, function, and procedure definitions
 with placeholders. Off by default. See
 [Query redaction](https://docs.atlan.com/llms/connectors/alloydb-postgresql/query-redaction/llms.txt).
5. The cloud the Atlan tenant runs on, as the UI sets it for the same workflow.

## Update existing workflows

Publish a new version on the same `slug` with the builder's `load()` / `update()`.
It reads the workflow's current inputs, lets you change only the fields you pass,
and preserves everything else, including the connection and its credential. No run
starts; the next run, manual or scheduled, uses the new version.

### Python

```python showLineNumbers title="Turn on Redact SQL Text via the builder"
(
 AtlanAlloydbPostgres(client)
 .load("atlan-alloydb-postgres-1700000000-AbC123") # (1)
 .redact_sql_text(True) # (2)
 .update()
)
```

1. Seed the builder from the workflow's current inputs.
2. Change only the fields you need; anything unset keeps its current value.

To apply one change across every AlloyDB for PostgreSQL workflow on the tenant,
list workflows with `client.app.get_all()` and update each whose `app_id` is
`atlan-alloydb-postgres`, as shown for Cloud SQL in
[Update existing workflows](https://docs.atlan.com/llms/platform/python/cloud-sql-postgresql-sdk-references-app-reference/llms.txt).
See [Manage apps](https://docs.atlan.com/llms/platform/python/manage-apps/llms.txt) for the rest of the lifecycle—list, get, run status, schedules, and delete—shared by every app.

_Last updated: 26 October 2026._

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