Variable Substitution in

dagster.yaml

I have previously had something like the following in my

dagster.yaml

which allowed me to use environment variables to control some details of how a run worker will log,

python_logs:
  dagster_handler_config:
    handlers:
      gcpHandler:
        (): my_logging.Handler
        level: DEBUG
        formatter: gcpFormatter
    formatters:
      gcpFormatter:
        (): my_logging.Formatter
        client:
          env: DAGSTER_CLIENT
        environment:
          env: DAGSTER_ENVIRONMENT

It worked really nicely. I switched back to using this technique today, but the variable substitution doesn't seem to be working (0.13.12) - the

client

and

environment

parameters to

my_logging.Formatter.__init__

are dicts like

{"env": "DAGSTER_CLIENT"}

, as if the variable substitution has been skipped. I am using variable substitution in other parts of the

dagster.yaml

and that seems to be working fine, e.g.

compute_logs:
  module: dagster.core.storage.local_compute_log_manager
  class: LocalComputeLogManager
  config:
    base_dir:
      env: DAGSTER_LOCAL_COMPUTE_LOG_MANAGER_DIRECTORY

I'm hoping that I'm simply doing something stupid, but I can't figure it out...