GCP App Engine：将服务从柔性环境迁移到标准环境

Question

There is documentation on migrating GCP App Engine services from standard to flexible, though none on going the other direction. It seems flexible is more stringent, and so less work is required going from flex to standard, but I'm not certain, as a simple change in the app.yaml is breaking the app.

Any insight out there on smoothly changing from GCP App Engine flex env to standard?

thank you-

Answer 1

The vast majority of the time, code written for Flex will work on Standard (unchanged). What you do need to do is make sure to make all the necessary changes in your app.yaml (it's not as simple as just removing env: flex ).

One option to do this is pull up the Flex app.yaml reference side-by-side with the Standard app.yaml reference and make sure you:

1. Use valid settings for Standard (eg runtime: python39 instead of using the runtime_config field)
2. Remove any settings that are not applicable for Standard (eg, Healthchecks)

In particular, pay attention to the Scaling settings, as they are similar, but have some easily-missed differences (eg min_num_instances for Flex, min_instances for Standard).

Also, if you are using Cloud SQL , there are some differences in how you configure the connection.