External secrets k8s vault

https://www.digitalocean.com/community/tutorials/how-to-access-vault-secrets-inside-of-kubernetes-using-external-secrets-operator-eso

https://github.com/external-secrets/external-secrets

https://github.com/zakkg3/ClusterSecret

Syncing secrets between namespaces

https://stackoverflow.com/questions/46297949/sharing-secret-across-namespaces

https://github.com/pbchekin/vault-sync

https://github.com/emberstack/kubernetes-reflector