I want to modify the Dockerfile of a Google App Engine managed VM that uses a standard runtime (python27).
I want to do this to add a C++ library that needs to be called to implement an HTTP request. This library is pretty much the only addition I need to the sandboxed python27 runtime.
The documentation makes it quite clear that this is possible:
Each standard runtime uses a default Dockerfile, which is supplied by the SDK. You can extend and enhance a standard runtime by adding new docker commands to this file.
Elsewhere they say that they Dockerfile of a standard runtime will be generated in the project directory:
When you use gcloud to run or deploy a managed VM application based on a standard runtime (in this case Python27), the SDK will create a minimal Dockerfile using the standard runtime as a base image. You'll find this Dockerfile in your project directory...
This is the one I am supposed to modify according to the same page:
Later steps in this tutorial will show you how to extend the capabilities of your runtime environment by adding instructions to the Dockerfile.
The problem is that when I do run my application on the dev server, I cannot find the Dockerfile anywhere, so I can't make any changes to it.
Has anyone managed to modify the standard runtime Dockerfile for Google App Engine? Any help would be appreciated.
It seems like the Dockerfile is generated only when using gcloud preview app run and not dev_appserver.py, which was what I was using.
I am however not able to modify the Dockerfile and run a custom managed VM. But that is a seperate error (--custom_entrypoint related).
This whole situation is a nightmare fueled by atrocious documentation and support. A warning for other developers considering Google App Engine.