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Migrate PostgreSQL DB from docker contaier to Digital Ocean Managed DB

Posted on August 1, 2024

tried to migrate a PostgreSQL database from a Docker container to a DigitalOcean Managed Database, but when I tested the connection to the source database, it failed to connect.

I followed the migration guide by preparing the source database for migration with the following steps:

Allow remote connections
Enable logical replication
Change max replication slots

However, it still fails to connect to the source database.

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Bobby

August 7, 2024

Hi there,

Rather than using the live replication migration, have you considered using pg_dump and then importing that dump to your managed database?

You can do that by following the steps here:

https://docs.digitalocean.com/products/databases/postgresql/how-to/import-databases/

To use pg_dump, you need specify the connection details (like admin username and database) and redirect the output of the command to save the database dump. The command will look like this:

pg_dump -h <your_host> -U <your_username> -p 25060 -Fc <your_database> > <path/to/your_dump_file.pgsql>

Then once you have the dump, to import it to the new source database, ensure that you can connect to your target database with psql. Then, you need to find the connection URI for the target database you want to add the existing data into.

To import a source database in custom format, use the pg_restore command:

pg_restore -d <your_connection_URI> --jobs 4 <path/to/your_dump_file.pgsql>

If you prefer the live migration, can you share the exact changes that you’ve made to your Docker Postgres instance? And also share the conf file here.

- Bobby

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