Troubleshooting the AlertManager Configuration

Problem	Cause	Solution
No alerts being received	AlertManager is not running	Check: kubectl get pods -n monitoring \| grep alertmanager
	Incorrect SMTP server	Verify the SMTP server address and port.
	Network connectivity	Ensure the cluster can reach the SMTP server or webhook endpoint.
	Authorization failure	Check credentials and ensure secrets were created properly.
Duplicate alerts	Multiple similar configurations	Check existing configurations with: kubectl get alertmanagerconfig -n monitoring
Alerts missing	Incorrect matchers	Review matchers to ensure they match expected alerts.
Alerts missing	--alertgroup filter too restrictive	Try --alertgroup both to see all alerts.