MailPit scale to zero

[fowl2]

Related to an existing integration?

Yes

Existing integration

MailPit

Overview

Currently all my dev/test environments running on Azure Container Apps with scale to zero. Since adding MailPit, it has dominated my costs. It would be great MailPit would scale to zero too.

Usage example

Option A

// No API, it's by default <3

Option B

.AddMailPit()
.WithDataVolume()
.WithScaleToZero()

// needs some more thought

Breaking change?

I'm not sure

Alternatives

1. Do nothing: just pay the cost.
2. Set up scale rules in apphost logic.

Additional context

As far as I can tell this should be possible with TCP Scale Rules. I thought this was a KEDA thing but maybe it's Azure Container Apps specific :(.

Another wrinkle might be that persistent storage is not enabled by default, without which every scale operation loses all the emails.

Help us help you

Yes, but only if others can assist

[aaronpowell]

This isn't something that is handled by the integration, it's something you'll need to configure in the Container Apps part of your app host. I believe https://aspire.dev/integrations/cloud/azure/configure-container-apps/#use-publishasazurecontainerapp is the part that is for controlling the scaling sizes of ACA resources.