ConfigMap with multiple yaml files and bootstrap.yaml one of them

Describe the bug Hello, I’m trying to find out the way how to provide local development and also configure application for kubernetes. So for local development we are using something like this structure:

application/
├── config/
│   ├── application.yaml
│   ├── bootstrap.yaml
└── src/
    └── main/
        └── resources/ 
            ├── application.yaml
            └── bootstrap.yaml

so in config/ folder we have configuration for our local development in resources/ folder we have configuration with defaults which we don’t want to override

and in configmap I’d like to use something like this:

kind: ConfigMap
apiVersion: v1
metadata:
  name: {{ template "chart.fullname" . }}
data:
  application-kubernetes.yaml: |-
    ...
  bootstrap-kubernetes.yaml: |-
    ...

where I’d like to provide only the configs that I want to change for kubernetes.

However it looks like the bootstrap-kubernetes.yaml file didn’t took effect.

Is such patter available or what whould be the best option to provide also configuration for boostrap.yaml?

[wind57]

I could take a stab at this one, but imo, we need to establish some (documented) rules here.

here is my proposal:

• if there is a single key in the configmap and it ends in yaml/yml/properties - treat it as a “file”, we don’t care about its name. (this is the current behavior)
• there are more than one entries in the configmap. Search for ones that have <SPRING_APPLICATION_NAME>.yaml/yml/properties (or application.yaml/yml/properties if SPRING_APPLICATION_NAME is missing) + all their profile based ones. For example, let’s suppose that

spring.application.name=my-name and active profiles = k8s; a config like:

kind: ConfigMap
apiVersion: v1
metadata:
  name: my-configmap
data:
  my-name.yaml: |-
    ...
  my-name-k8s.yaml: |-
    ..
my-name-dev.yaml: |-
   ..

someProp: someValue

This will result in three entries being read:

• my-name.yaml treated as a file
• my-name-k8s.yaml treated as a file
• my-name-dev.yaml ignored since there is no such profile dev active
• someProp: someValue plain property

If you agree, or have any other suggestions, do let me know; when I get a green light, I will implement this. thank you

[ryanjbaxter]

This is kind of an interesting problem. The problem is here

https://github.com/spring-cloud/spring-cloud-kubernetes/blob/master/spring-cloud-kubernetes-config/src/main/java/org/springframework/cloud/kubernetes/config/ConfigMapPropertySource.java#L161

When there are multiple files defined in a single configmap they need to be named application.yaml application.yml or application.properties. Since you have -kubernetes appended and you also have bootstrap-kubernetes we just make the file name the key and the content the value.

If you hit /actuator/env I am sure you will see that in the output.

I dont see a reason why the file name really matters in the case of using the API to read the ConfigMap and we wouldnt head down this path when reading from a path. I think the fix is really just to check that the file extension in the configmap is either yaml yml or properties.

The interesting problem has to do with profiles…I am not sure how to do that at the moment. You could have application-dev.yaml and application-production.yaml for example and right now that would all be combined into one property source.

The best workout I can offer at the moment would be to separate the files into different configmaps.