The orion helm chart refers to "internalPostgres" here, but I can't find this key anywhere; is it real? If not, how should I point my orion at an existing/external postgres server - will it switch automatically if I provide an externalHostName?

Ah, good catch, that looks like a stale comment, we’ll update it. If useSubChart is false, then we’ll use the externalHostname setting: https://github.com/PrefectHQ/prefect-helm/blob/f111427b1cd854e5b733f0d00c47a512a7f93006/charts/prefect-orion/templates/_helpers.tpl#L25 So make sure you specify

useSubChart: false

, otherwise the chart will deploy bitnami’s postgres chart during installation

Thanks!