Alertmanager.spec.configSecret

configSecret defines the name of a Kubernetes Secret in the same namespace as the Alertmanager object, which contains the configuration for this Alertmanager instance. If empty, it defaults to `alertmanager-<alertmanager-name>`. The Alertmanager configuration should be available under the `alertmanager.yaml` key. Additional keys from the original secret are copied to the generated secret and mounted into the `/etc/alertmanager/config` directory in the `alertmanager` container. If either the secret or the `alertmanager.yaml` key is missing, the operator provisions a minimal Alertmanager configuration with one empty receiver (effectively dropping alert notifications).