Sketching my ideal Kubernetes cluster

Sketching a Kubernetes infrastructure with GitOps, Kustomize and Flux2. Including nginx, cert-manager, a mix of SOPS and Sealed secrets for secret storage, CrunchyData postgres operator for managing postgres instances and their backups, and prometheus observability stack. All segregated in their separate namespaces, and with 3 separate cross-cloud clusters (dev, staging, prod).
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