ArgoCD Google OAuth Login Redirects Back to Login Page

[helenrai]

I have configured Google OAuth for ArgoCD using the following argocd-cm configuration:

data:
  url: https://argocd.mydomain.com
  dex.config: |
    connectors:
    - config:
        issuer: https://accounts.google.com
        clientID: XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX.apps.googleusercontent.com
        clientSecret: XXXXXXXXXXXXXXXXXXXX
      type: oidc
      id: google
      name: Google

When I access https://argocd.mydomain.com and click on "Login via Google", I am redirected to the argocd login page again.
When expected result was to be redirected to gmail page.
Here are additional details about my setup:

• ArgoCD is running in a Kubernetes cluster.
• The ArgoCD URL is exposed via an ingress using a custom domain.
• The redirect URL in Google OAuth settings is set to https://argocd.mydomain.com/api/dex/callback.
• No errors are visible in the browser or the ArgoCD logs.

I’ve already tried:

• Ensuring the url in the ConfigMap matches the domain.
• Restarting the argocd-server pod after configuration changes.

What could be causing the issue? How can I troubleshoot this further?