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Add PrometheusRule alerts for the DataHub namespaces in Cloud Platform, pointing at the aws resources (rds, opensearch), resource usage metrics (for the
datahub-gms
pod), deployment metrics, pod status metrics (out of memory, crashloop backoff, frequent restarts), ingress metrics (modsecurity blocking events, servicing error responses).Opensearch metrics may not be suffificient, as during a recent bottleneck event, Opensearch was unresponsive but Prometheus metrics were absent during the period of downtime.