Slack notification channel in GKE (Kubernetes)

Hi everyone. I have setup Grafana to run in GKE. I am currently using the default Ingress to expose the deployment. My database connections are done through SQLProxy and everything is working flawlessly.
My problem is that I am trying to setup Slack notifications using their webhook, but I am unable to send notifications and receive an error 502 message when doing the Send Test.
Has anyone run into this problem before and if so, how was it resolved?

It sounds like you might be restricting outgoing traffic from your network. Are you able to make the API call from a different pod?

Thanks for the reply. Yes there were some cluster Network Policies restricting outgoing traffic. After adjusting the policies within my namespace everything was resolved.

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