Diffing with slash in field name

[mg03]

Hi

I want to use ignoreDifferences for a annotation field in all services.
In order to set it up as a system level configuration, I am modifying the argo-cm configmap.

Qs 1) What would be the resource name that I need to use for services?

Qs 2) In the ignoreDifferences section, can I provide a fieldname with a slash in it? suppose field name is "string1/string2"

data:
resource.customizations: |
<what is this for services????>:
ignoreDifferences: |
jsonPointers:
- /metadata/annotations/string1/string2

[alexec]

These are JSON pointers. I believe you can use tilde character.

https://tools.ietf.org/html/rfc6901

[mg03]

ok thanx @alexec and the resource name under resource customizations does it follow a format. Is the format: APIGROUP/KIND?

[Lirt]

So for example if I want to reference annotation checksum/certs from yaml like this:

metadata:
  annotations:
    checksum/certs: "CHECKSUM"

RFC says that / is encoded as ~1, so appropriate json pointer is this /metadata/annotations/checksum~1certs?

[maximmold]

I'm having issues ignoring a label in a CRD. It appears that K8S is automatically removing it for some reason and I'd like to just ignore it if the label is there in source control, but not showing up in K8S.

The CRD looks like this

apiVersion: apiextensions.k8s.io/v1beta1
kind: CustomResourceDefinition
metadata:
  labels:
    app.kubernetes.io/name: velero

Here is my application spec...

apiVersion: argoproj.io/v1alpha1
kind: Application
metadata:
  name: velero
  namespace: argocd
spec:
  project: tools
  source:
    repoURL: 'https://github.com/../...'
    plugin:
      
  ignoreDifferences:
    - group: apiextensions.k8s.io/v1beta1
      kind: CustomResourceDefinition
      namespace: velero
      jsonPointers:
        - /metadata/labels/app.kubernetes.io~1name

Does this not work with the custom plugin?

[younsl]

You can escape it by replacing the slash / with ~1 in the argocd application's jsonPointers.

Example of slash escaping an annotation named checksum/clusteragent_token:

# argocd application resource yaml
spec:
  ignoreDifferences:
    - kind: Secret
      name: datadog-cluster-agent
      jsonPointers:
        - /data/token
    - group: apps
      kind: Deployment
      name: datadog-cluster-agent
      jsonPointers:
        - /spec/template/metadata/annotations/checksum~1clusteragent_token
    - group: apps
      kind: Deployment
      name: datadog-clusterchecks
      jsonPointers:
        - /spec/template/metadata/annotations/checksum~1clusteragent_token

Other slash escape example in argocd docs:

If you have a slash / in your pointer path, you need to replace it with the ~1 character.
For example:

spec:
  ignoreDifferences:
  - kind: Node
    jsonPointers: /metadata/labels/node-role.kubernetes.io~1worker

References

• jsonPointer official docs
• Unable to ignore differences in metadata annotations #2918 (comment)