Create kubernetes secret from .json file

Question

I have a json file with some keys like this:

{
  "a":"someval"
  "b":"someval"
  .. more keys
}

How do I add these keys to a secret in kubernetes?

When I try $ kubectl create secret generic mysecret --from-file=file.json it returns a secret containing the file, but I want to map the contents of the file to the secret, not add the file as a secret.

Output:

$ kubectl get secret mysecret -o yaml

apiVersion: v1
data:
  file.json: #base64 encoded stuff here.
kind: Secret

---

Wanted output:

$ kubectl get secret mysecret -o yaml

apiVersion: v1
data:
  a: someval
  b: someval
kind: Secret

What am I doing wrong?

Answer 1

If you have flat (not nested) JSON then try this (assuming you have jq tool installed):

kubectl create secret generic test --from-env-file <(jq -r "to_entries|map(\"\(.key)=\(.value|tostring)\")|.[]" YOUR_FILE.json)