[013a]

You can run any container. It just wouldn't run as you expect if you don't implement the lambda runtime api.

> Google Cloud Run, which everyone keeps comparing this with, works exactly like that.

Everyone does keep comparing this to GCR, wrongly. Not just because Lambda is not "bring any container" whereas GCR is, but more importantly because GCR and Lambda have very different operational models. GCR is a serverless platform for hosting web servers. Lambda is a serverless platform for event handling. The latter is a super-set of the former and thus requires more specific tools.

Yes, theoretically there could be a setup whereby you expose a port, and some lambda intermediary translates the invocation payload to an HTTP message your container can read. But I am endlessly fascinated why anyone would want that. I laugh a bit on how we've hit peak AWS where people here are legitimately asking for an HTTP request to hit an ALB, the ALB translates it into a lambda payload object, then a lambda component re-translates that payload back into an HTTP request, so your application can translate it into an object. Do you understand how insane that is?

The only tactile advantage lambda has over fargate is scale-to-zero. I think saving $7 per month is a pretty bad trade-off for the insane performance overhead and complexity a true docker-in-lambda solution would necessitate, and thus be unattractive to most consumers.