Add FerretDB Integration

[Matthewsre]

.NET Aspire issue link

dotnet/aspire#7322

Overview

I have an ASP.NET application that uses both PostgreSQL and MongoDB. FerretDB (powered by DocumentDB, which was recently open-sourced by Microsoft) provides a MongoDB-compatible layer on top of PostgreSQL. I would like an official way to configure FerretDB within .NET Aspire so I can either replace MongoDB entirely or simplify infrastructure.

Usage example

A straightforward integration in .NET Aspire similar to existing data providers/integrations. Since this provides a MongoDB compatibility layer, ideally it could be used the same way as the MongoDB integration (https://learn.microsoft.com/en-us/dotnet/aspire/database/mongodb-integration?tabs=dotnet-cli):

var builder = DistributedApplication.CreateBuilder(args);

var ferret = builder.AddFerretDB("mongo")
                   .WithLifetime(ContainerLifetime.Persistent);

var ferretdb = ferret .AddDatabase("mongodb");

builder.AddProject<Projects.ExampleProject>()
       .WithReference(ferretdb)
       .WaitFor(ferretdb);

Another consideration is leveraging an existing PostgreSQL, not sure what that would really look like to implement, but for the sake of providing a pseudo example:

var builder = DistributedApplication.CreateBuilder(args);

var postgres = builder.AddPostgres("postgres");
var postgresdb = postgres.AddDatabase("postgresdb");

var ferret = builder.AddFerretDB("mongo")
                   .WithReference(postgres)
                   .WithLifetime(ContainerLifetime.Persistent);

var ferretdb = ferret .AddDatabase("mongodb");

builder.AddProject<Projects.ExampleProject>()
       .WithReference(postgresdb)
       .WithReference(ferretdb)
       .WaitFor(ferretdb);

Additional context

• FerretDB can be a drop-in replacement for MongoDB 5.0+ and could be useful for applications that rely on MongoDB tooling or drivers but want to store data in PostgreSQL.
• This would unify our relational and document data needs in one database, particularly appealing to .NET developers already using PostgreSQL/Aspire.
• FerretDB github repo: https://github.com/FerretDB/FerretDB
• DocumentDB Open-Source announcement: https://opensource.microsoft.com/blog/2025/01/23/documentdb-open-source-announcement/
• DocumentDB github repo: https://github.com/microsoft/documentdb
• Open feature request on Aspire for DocumentDB integration: Add DocumentDB support in .NET Aspire dotnet/aspire#7320
• Closed feature request on Aspire repo recommending submission here: Add FerretDB support in .NET Aspire dotnet/aspire#7322

Help us help you

No, just wanted to propose this

[github-actions]

We have noticed this issue has not been updated within 21 days. If there is no action on this issue in the next 14 days, we will automatically close it. You can use /stale-extend to extend the window.

[github-actions]

This issue has been stale for 5 weeks and has been automatically closed.

[davidfowl]

This stalebot is aggressive

[YohanSciubukgian]

Could it be reopened / reconsidered ?

[github-actions]

We have noticed this issue has not been updated within 21 days. If there is no action on this issue in the next 14 days, we will automatically close it. You can use /stale-extend to extend the window.