Logging in UTC

Questions / Help
1 
#config.exs 

config :logger,
  backends: [
    {LoggerFileBackend, :error_log}
  ]

config :logger, :error_log,
  path: "/home/App/Logs/error.log",
  utc_log: true,
  level: :error

Config is based on recommendations indicated here and here. Despite including utc_log: true all logs are still recorded in local time. What else is needed to change this to UTC time?

2

Are you not overriding it in in the other configuration files? Like in config/#{Mix.env()}.exs or runtime.exs?

Did you confirmed the timezone in the host?

3

Try setting utc_log at the logger top-level instead of within the :error_log subsection:

config :logger,
  utc_log: true

Although it looks like LoggerFileBackend doesn’t support utc_log:

LoggerFileBackend supports the following configuration values:
    path - the path to the log file
    level - the logging level for the backend
    format - the logging format for the backend
    metadata - the metadata to include
    metadata_filter - metadata terms which must be present in order to log

Also it seems a bit odd that LoggerFileBackend is reading configurations from :logger, :error_log, generally libraries should read their configuration from their own application’s configuration which would be :logger_file_backend, :error_log in this case.

3 Likes
4

It’s a logger option, as mentionned in the first post, second link.

Maybe because it is just one of the many possible backend for logger.

That should be the solution.