support invalid limits configmap

[eguzki]

what

If the limits config map, for whatever reason, does not have a valid content to be parsed into a limits array, the operator fails to reconcile and cannot recover. This fix, is to handle that error. So if a invalid content is found, revert to desired content.

verification steps

dev setup

make local-setup

Deploy the limitador CR

k apply -f - <<EOF
---
apiVersion: limitador.kuadrant.io/v1alpha1
kind: Limitador
metadata:
  name: limitador-sample
spec:
  limits:
    - conditions: ["get_toy == 'yes'"]
      max_value: 2
      namespace: toystore-app
      seconds: 30
      variables: []
EOF

Check that the limits config map content

k get configmaps limits-config-limitador-sample -o jsonpath='{.data}' | yq e -P
limitador-config.yaml: |
  - conditions:
    - get_toy == 'yes'
    max_value: 2
    namespace: toystore-app
    seconds: 30
    variables: []

Now, try to change it manually. Add some invalid content

k patch configmaps limits-config-limitador-sample --type merge --patch '{"data":{"limitador-config.yaml": "my own stuff"}}'

The operator should read the invalid content, and revert the changes back to the desired limits.

k get configmaps limits-config-limitador-sample -o jsonpath='{.data}' | yq e -P
limitador-config.yaml: |
  - conditions:
    - get_toy == 'yes'
    max_value: 2
    namespace: toystore-app
    seconds: 30
    variables: []