Gerrit-K opened a new issue, #1337:
URL: https://github.com/apache/polaris/issues/1337
### Is your feature request related to a problem? Please describe.
tl;dr: it would be useful if credentials/configuration for the persistent
metastore could be set via environment variables
When running Polaris with a persistent metastore (e.g. PostgreSQL) in a
production-like environment, it can be cumbersome to provide configuration
details (like credentials and hostname) because they need to be embedded in raw
in the `persistence.xml` file. In production environments, especially in the
Kubernetes ecosystem, it is not uncommon to manage this configuration
externally (e.g. credentials generated and managed by an operator), in which
case the format of these configuration pieces often doesn't match the required
`persistence.xml` format. This means that these components cannot be wired
together using IaC, but rather some things need to be manually copied after
deploying the metastore and embedded into a `persistence.xml`.
### Describe the solution you'd like
I would be very useful if the connection details could be provided via
environment variables - at least the URL, username and password. Ideally, this
could be a generic solution, where the `persistence.xml` file could contain
bash-style placeholders like `${VAR}`, which would then be replaced by
environment variables at runtime when loading the xml file.
### Describe alternatives you've considered
As a hacky workaround, we're currently injecting `initContainers` that mount
the `persistence.xml` file, replace placeholders by environment variables and
write the result into a new file that is then mounted by the Polaris container.
### Additional context
_No response_
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