Apache Flink

Hi everyone, does anyone know how can I inject and environment variable to flink-configuration.yaml? I want to replace `metrics.reporter.dghttp.apikey: XXXsecretXXX` for something like `metrics.reporter.dghttp.apikey: "${DATADOG_APIKEY}"` , the environment variable `DATADOG_APIKEY` exist within the jobmanager and taskmanager pods, but it doesn't get picked by `flink-configuration.yaml` nor using the format `"${DATADOG_APIKEY}"` , `${DATADOG_APIKEY}` or `$DATADOG_APIKEY` .

Another option I tried was using `METRICS_REPORTER_DGHTTP_APIKEY` as the env variable, as I was explained that by convention flink could expect `metrics.reporter.dghttp.apikey` to be in the env var `METRICS_REPORTER_DGHTTP_APIKEY`

But you can use a special `FLINK_PROPERTIES` env var like this <https://lists.apache.org/thread/jmh9s1c8kgp7pbd0b5c9fqks5nksb682>

thanks, Sap1ens, it's like I supposed, I didn't want to use a script, but it seems like the only way forward atm. I think is a bad implementation from Flink, configMaps are not supposed to contain secrets, at least provide an env var alternative.