And when I get the value of the

imageTag

variable, I get

default value

instead of

not default value

. What am I missing? Thanks in advance!

I can't find many examples of this syntax out there. The only one I could find that said it was working wasn't using quotes around the keys, and put all the code on a single line. And I couldn't find any example that set a property that wasn't in the project's config. If you change to using

new Config()

instead of

new Config("foo")

(and removing the matching

foo:

) does it work? If not, try it like the examples here: https://github.com/pulumi/actions/issues/911

config-map: |
  { foo:bar: { value: "not default value" } }

I am doing further debugging and I believe that it actually works as expected. I think something else is not working where this value is further used. I am investigating.

Just a wild guess, but what is the name of your Pulumi project in

Pulumi.yaml

? Does the config key need to be prefixed with that?

Thanks Aaron. It was a much simpler problem – the value was overwritten elsewhere on top of the "default" logic we had. All sorted now.