Go app engine dev_appserver.py doesn't support runtime go112

I am trying to migrate my Go app to runtime go112, but dev_appserver.py throw the following error:

RuntimeError: Unknown runtime 'go112'; supported runtimes are 'custom', 'go', 'go111', 'java', 'java7', 'java8', 'php55', 'php72', 'python', 'python-compat', 'python27', 'python37'.

Current Go version is 1.12.11

Edit: I used apt-get to install the SDK.

apt-get update && apt-get install google-cloud-sdk google-cloud-sdk-app-engine-python\
    google-cloud-sdk-app-engine-python-extras\
    google-cloud-sdk-app-engine-java\
    google-cloud-sdk-app-engine-go\
    google-cloud-sdk-datalab\
    google-cloud-sdk-datastore-emulator\
    google-cloud-sdk-pubsub-emulator\
    google-cloud-sdk-cbt\
    google-cloud-sdk-cloud-build-local\
    google-cloud-sdk-bigtable-emulator\
    kubectl -y

That way it seems I can't use gcloud components update and the packages are not up-to-date in the repos.

Now my questions is: Does google-cloud-sdk-app-engine-go support go runtime 1.12? If not, when will it support runtime 1.12?

Update: I installed cloud SDK and run gcloud components update successfully on another computer, dev_server.py still throw the same error. Does the local SDK actually support rumtime 1.12?

Solution

go112 runtime is not available on local dev_appserver.py. This has been discussed on the App Engine Go forum at

https://groups.google.com/forum/#!topic/google-appengine-go/kHxZ9zIb_QE

The expectation is that starting from go112 runtime, there is no "appengine" way of running the go server and works normally like any go server outside GAE. There are a few open issues like dispatching urls though.