Migrating DigitalOcean database to AWS

Migrating DigitalOcean database to AWS

Hot to migrate a Postgres database from a 'managed database' on Digital Ocean to AWS RDS instance

Francesco Ciulla's photo
Francesco Ciulla

Published on Oct 14, 2021

3 min read

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Video Version: youtu.be/3zLWCNn0Vqk

In this article, we’ll look at how to migrate an existing Postgres database on DigitalOcean created through their "managed database" function to a Relational Database Service (RDS) instance on AWS.

For an introduction to RDS, you can read my previous article on migrating a local database to RDS, or watch the video.

Prerequisites:

  • Managed database on DigitalOcean with some data in it
  • AWS account
  • (optional) TablePlus or any other tool to manage a Postgresql DB

Steps:

  • Check DigitalOcean and download the connection certificate
  • Install TablePlus (GUI tool for managing relational databases)
  • Check DigitalOcean database
  • Create RDS instance
  • Test empty RDS instance
  • Backup DigitalOcean DB
  • Restore RDS database
  • Final Test

Check DigitalOcean and Download CA certificate

First, let's visit our DigitalOcean account’s Database page. We should see something like this:

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Download the CA certificate locally. We need this because managed databases on DigitalOcean don't allow insecure connections.

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TablePlus

To access the DB, we can use whatever tool we want (command line interface, Pgadmin, etc.). In this demo, we will use TablePlus (available on Mac/Windows), so if you want to follow along exactly I suggest you download it. We’ll use the free version.

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Check DigitalOcean Database

Let's create a new connection on TablePlus:

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Add the details for your DigitalOcean database:

  • Host
  • Port
  • Username
  • Password
  • Database name
  • SSL mode: REQUIRED

Remember also to add the certificate we just downloaded.

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Click Connect and you will see the database with your data. In this case, we have just 2 tables and 3 inserts.

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Create RDS Instance

Go on AWS Console and search "RDS"

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Click Create Database.

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Select Postgres and version 12, so we will have access to a free Tier (read the conditions before accepting).

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Choose a name for the database, as well as a username and password to access the DB.

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Make the instance accessible from the Internet:

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Double-check that this is a Free Tier (with limitations- please read them)Then, click Create Database.

This will take a few minutes to complete.

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Let's check that our security group is configured correctly. Our machine should have access to the instance:

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Specifically, check if the inbound rules are set properly. In our case, they’re as follows:

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Test Empty RDS Instance

Now let's test connecting to the RDS instance using TablePlus:

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Click Connect. As you can see, the DB is empty for now:

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Backup DigitalOcean DB

Now let’s use Tableplus to make a backup of the DigitalOcean database:

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Choose a folder and save the file called defaultdb.dump (it will have the name of your database):

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If you see this, it worked:

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Restore RDS Database

To restore the database, click Restore.

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Select the aws database. Then, select the postgres database and click Start restore:

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Select the dump file, in our case defaultdb.dump:

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Final Test

As a final test, let's access the RDS database again:

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And here we can see our tables and inserts again:

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And we’re done!

Video Version: youtu.be/3zLWCNn0Vqk

 
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