Injecting configurations from environment files

Let's take a look at the cm/my-env-file.yml file:

cat cm/my-env-file.yml  

The output is as follows:

something=else 
weather=sunny 

The file has the same key/value pairs as those we used in the example with --from-literal:

Let's see what happens if we create a ConfigMap using that file as the source.

kubectl create cm my-config \
    --from-env-file=cm/my-env-file.yml
    
kubectl get cm my-config -o yaml  

We created the ConfigMap using the --from-env-file argument, and we retrieved the ConfigMap in yaml format.

The output of the latter command is as follows (metadata is removed for brevity):

apiVersion: v1 
data: 
  something: else 
  weather: sunny 
kind: ConfigMap 
... 

We can see that there are two entries, each corresponding to key/value pairs from the file. The result is the same as when we created a ConfigMap using...