I've been trying every Docker platform for years (Joyrnt Triton, Tutum, k8s on various platforms)... Cloud Run is by far my favorite

I fully agree with this. I'm using Cloud Run since the day it got into beta and never been happier. It beats all the other platforms (for docker) IMO.

Out of curiosity, what are you using for your databases?

I use Cloud Firestore, it's also serverless and is really easy to use for building SPAs as you can do a lot of things with just frontend code and trigger cloud functions when things in the database change.

I do wish there was a serverless SQL option like AWS has, but nothing yet. Can always use Cloud SQL, but as others have mentioned you need to access it over a public IP (for now)

Have you seen the instructions for using a Unix socket with Cloud SQL from Cloud Run?

https://cloud.google.com/sql/docs/mysql/connect-run

Not OP but I can setup DB of choice on an instance or group of instances and access directly from the Cloud Run containers. Our particular main stack is on MongoDB 3.4 so we deployed Atlas on the VPC and the containers access it just fine.

For side projects doesn't it end up being a little too expensive?

As far as I am aware, there is nothing like CloudRun where your whole App are changed at a per second / request intervals. ( Although No Private Network means Your SQL requires Public IP which is a big No No )

I haven't tried using it though, and my recent submission [1] where BaseCamp had problem with GCP and moved back to AWS.

[1] https://news.ycombinator.com/item?id=21733996

Although a public IP address is required, you don't need to poke any holes in the firewall. As a result, it is not a problem from a security perspective.

https://cloud.google.com/sql/docs/mysql/connect-run