oidc secret

[castleadmin]

Is your feature request related to a problem? Please describe.
On the page https://argocd-operator.readthedocs.io/en/latest/usage/basics/#secrets it is stated:

There is a Secret that is used by Argo CD named argocd-secret. The argocd-server component reads this secret to obtain the admin password for authentication.
This Secret is managed by the operator and should not be changed directly.

For the configuration of OIDC the secret 'argocd-secret' has to be changed:
https://argoproj.github.io/argo-cd/operator-manual/user-management/microsoft/#azure-ad-app-registration-auth-using-oidc

I found no way to configure the secret using the argocd CRD.

Describe the solution you'd like
Currently the 'admin.password' gets synced from the 'argocd-cluster' secret to the 'argocd-secret' secret. A similar syncing mechanism could be implemented for the oidc client secret.

Describe alternatives you've considered
The policy that it isn't recommended to change the 'argocd-secret' directly could be changed.

[KevinBonilla]

@castleadmin did you ever find a workaround for this problem? I'm running into the same issue as well where I need to manually append the oidc client secret into argocd-secret. Would be great if we had a sync mechanism similar to how tls secrets sync to argocd-secret.

[KevinBonilla]

After some digging I was able to find documentation about secrets Alternatives. Where within the operator deployment yaml I just need to references the secret file and key value. Format will look like this:

spec:
  oidcConfig: |
    name: AzureAD
    issuer: <redacted issuer URL>
    clientID: <redacted clientID>
    clientSecret: $argocd-oidc:oidc.azuread.clientSecret
    # Optional set of OIDC scopes to request. If omitted, defaults to: ["openid", "profile", "email", "groups"]
    requestedScopes: ["openid", "profile", "email"]
    # Optional set of OIDC claims to request on the ID token.
    requestedIDTokenClaims: {"groups": {"essential": true}}

So now in the argocd-cm the clientSecret will look for a secret called argocd-oidc with a key called oidc.azuread.clientSecret.

My secret looks like this, since we use ExternalSecrets I had to learn how to inject the proper annotation but thanks to
this issue I was able to find the proper formatting app.kubernetes.io/part-of: argocd of my ArgoCD oidc secret. The ExternalSecret now looks like this:

apiVersion: kubernetes-client.io/v1
kind: ExternalSecret
metadata:
  name: argocd-oidc
  namespace: argocd
spec:
  backendType: vault
  template:
    metadata:
      labels:
        app.kubernetes.io/part-of: "argocd"
  data:
    - name: oidc.azuread.clientSecret
      key: <redacted kv path>
      property: OIDC_CLIENT_SECRET