Google AlloyDB
This page describes how to configure AlloyDB credentials for use by Census and why those permissions are needed.
In order for a third party application (like Census) to query your AlloyDB, Google Cloud requires that you set up an Auth proxy as detailed in their documentation. If you have any questions at all setting up this Auth proxy, please reach out to [email protected].
Census reads data from one or more tables (possibly across different schemata) in your database and publishes it to the corresponding objects in external systems such as Salesforce. To limit the load on your database as well as to other apps' APIs, Census computes a “diff” to determine changes between each update. In order to compute these diffs, Census creates and writes to a set of tables to a private bookkeeping schema (2 or 3 tables for each sync job configured).
We recommend you create a dedicated
CENSUS user account with a strong, unique password. Census uses this account to connect to your AlloyDB database. In order for the Census connection to work correctly, the CENSUS account must have these permissions:- The ability to create the
CENSUSschema and full admin access to all tables within that schema (including creating tables, deleting tables, and reading and writing to all tables). - Read-only access to any tables and views in any schemata that you would like Census to publish to your service destinations.
- If you are using Census to load service data into your warehouse, read-write access to the schema where Census should load data (note that this is not included in the sample script below).
AlloyDB permissions are complex and there are many ways to configure access for Census. The script below has been tested with AlloyDB and is known to work correctly:
-- Give the census user the ability to sign in with a password
CREATE USER CENSUS WITH PASSWORD '<strong, unique password>';
-- Create a private bookkeeping schema where Census can store sync state
-- Skip this step if working in read-only mode
CREATE SCHEMA CENSUS;
-- Give the census user full access to the bookkeeping schema
-- Skip this step if working in read-only mode
GRANT ALL ON SCHEMA CENSUS TO CENSUS;
-- Ensure the census user has access to any objects that may have already existed in the bookkeeping schema
-- Skip this step if working in read-only mode
GRANT ALL PRIVILEGES ON ALL TABLES IN SCHEMA CENSUS TO CENSUS;
-- Let the census user see this schema
GRANT USAGE ON SCHEMA "<your schema>" TO CENSUS;
-- Let the census user read all existing tables in this schema
GRANT SELECT ON ALL TABLES IN SCHEMA "<your schema>" TO CENSUS;
-- Let the census user read any new tables added to this schema
ALTER DEFAULT PRIVILEGES IN SCHEMA "<your schema>" GRANT SELECT ON TABLES TO CENSUS;
-- Let the census user execute any existing functions in this schema
GRANT EXECUTE ON ALL FUNCTIONS IN SCHEMA "<your schema>" TO CENSUS;
-- Let the census user execute any new functions added to this schema
ALTER DEFAULT PRIVILEGES IN SCHEMA "<your schema>" GRANT EXECUTE ON FUNCTIONS TO CENSUS;
We strongly recommend against connecting Census to a production AlloyDB database. Census queries are often very analytical in nature and do not always play nicely with production environments.
- If you have multiple schemata that you would like Census to read from, repeat the steps for "<your schema>" for each of them
- If you are using Census models to execute stored procedures (this is rare and not recommended for most users) you may also need to give Census access to those procedures
All connections from the Census Data Warehouse Service to your database are protected by TLS encryption - Census will refuse to connect to a warehouse that does not support TLS. All Census data stored in S3 is encrypted with AWS Server-Side Encryption (SSE). We recommend configuring your AlloyDB instance to use TLS v1.2 or later for all connections.
With AlloyDB, you'll need to add Census's IP addresses in your firewall, and/or add rules to your
pg_hba.conf file to only allow the Census user to connect to your database.Census optionally allows connecting to AlloyDB warehouses that are only accessible on private/internal networks via SSH tunneling. To do so, you'll need to provide an SSH host server that is visible on the public internet and can connect to the private warehouse, and you'll also need to be able to perform some basic admin actions on that server.
- 1.Create a new user account for Census on the SSH host. (This account is separate from the database user account and can have a different username.)
- 2.On the Census connections page, create a new connection to a AlloyDB warehouse, enter the warehouse connection details, and then check the 'Use SSH Tunnel' option as shown below. Fill in the host and port of the SSH host machine along with the name of the user created in the previous step.
3. Once the connection is created, Census will generate a keypair for SSH authentication which can be accessed from the connections page.
To install the kepair, copy the public key in Census to you clipboard and add it to the SSH authorized keys file on the SSH host for the user created in the first step. If, for example, this user is named
census, the file should be located at/home/census/.ssh/authorized_keys. You may need to create this file if it doesn't exist.Note that the keypair is unique for each Census Warehouse connection. Even if you're reusing the same credentials, you'll need to add the new public keys.
4. If the SSH host restricts IP ranges that can connect to it, add the Census IPs to the allowlist.
With these steps complete, you should be able to complete a connection test, indicating that your tunneled connection is ready to be used in syncs.
Last modified 24d ago