Configuring the Processes

The first section in slimta.conf is process:

process:
  slimta:
    daemon: false
    logging: !include logging.yaml

It has a single sub-section, slimta, which manage settings for the slimta executables. You can use the --process-name command-line option to control this behavior. Each sub-section shares the same possible settings:

• daemon: Boolean

  Whether or not the executables should daemonize on startup. This option can be overriden by the --no-daemon command-line option. This value is False by default.

• user: String

  If given, the process will attempt to drop root privileges to this username. This is useful for when using privileged ports 25, 465, and/or 587. By default, privileges are not dropped by the process.

• group: String

  Like the user option, the process will attempt to drop privileges to this group name. By default, privileges are not dropped by the process.

• stdout: String

  If given, this path will be opened in append-mode (and created if necessary) and all standard output will be written to it instead of the console. This is particularly useful when daemonized. By default, the standard output stream is not redirected.

• stderr: String

  Like the stdout option, this redirects the standard error stream to the given path in append mode. By default, the standard error stream is not redirected.

• logging: Dictionary

  See the section on logging below. It’s often convenient to put logging configs in a separate config file, like in the example above. By default, debug-level logging is written to standard output.

Logging Configuration

Because the logging sub-section is parsed into a dictionary-like object, it is compatible with the logging.config.dictConfig() function. The dictionary schema explains how to use this configuration, and the logging.conf sample config has a good starting point.

A more advanced, logging config that produces log files ready for rotation in a readable and parseable format might look like this:

version: 1

formatters:
  console:
    format: '%(levelname)-8s %(name)-15s %(message)s'
  default:
    format: '%(asctime)s %(levelname)s %(name)s %(message)s'

handlers:
  console:
    class: logging.StreamHandler
    level: DEBUG
    formatter: console
    stream: !!python/name:sys.stdout
  file:
    class: logging.handlers.WatchedFileHandler
    level: DEBUG
    formatter: default
    filename: '/var/log/slimta/slimta.log'

loggers:
  celery:
    level: WARNING
    propagate: true
  slimta:
    level: DEBUG
    propagate: true

root:
  level: DEBUG
  handlers: [file]