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cloudsql_postgres.mdx

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Google CloudSQL Postgres Source Setup Guide

import SSHTunnel from '/snippets/ssh-tunnel.mdx';

Supported Postgres versions

Anything on or after Postgres 12

Enable Logical Replication

You don't need to follow the below steps if the settings cloudsql. logical_decoding is on and wal_sender_timeout is 0. These settings should mostly be pre-configured if you are migrating from another data replication tool.

  1. Click on Edit button on the Overview page.

  1. Go to Flags and change cloudsql.logical_decoding to on and wal_sender_timeout to 0. These changes will need restarting your Postgres server.

Add PeerDB Cloud IPs to Firewall

If you are using PeerDB Cloud, please follow the below steps to add PeerDB IPs to your network.

  1. Go to Connections section

  1. Go to the Networking subsection

  1. Add the public IPs of your PeerDB Cloud instance

Creating PeerDB User and Granting permissions

Connect to your CloudSQL Postgres through the admin user and run the below commands:

  1. Create a Postgres user for exclusively PeerDB.

    1.        CREATE USER peerdb_user PASSWORD 'some-password';

  2. Provide read-only access to the schema from which you are replicating tables to the peerdb-user. Below example shows setting up permissions for the public schema. If you want to grant access to multiple schemas, you can run these three commands for each schema.

    1.        GRANT USAGE ON SCHEMA "public" TO peerdb_user;
       GRANT SELECT ON ALL TABLES IN SCHEMA "public" TO peerdb_user;
       ALTER DEFAULT PRIVILEGES IN SCHEMA "public" GRANT SELECT ON TABLES TO peerdb_user;

  3. Grant replication access to this user:

    1.     ALTER ROLE peerdb_user REPLICATION;

  4. Create a publication that you'll be using for creating the MIRROR (replication) in future.

    1.    CREATE PUBLICATION peerdb_publication FOR TABLE table1, table2, table3....;

Create CloudSQL Postgres Peer in PeerDB

Through the PeerDB UI, create the CloudSQL Peer using the peerdb_user that you created in the previous step.