Log

The logging section tunes the logging settings.

Configuration

{{< config-alert-example >}}

log:
  level: 'info'
  format: 'text'
  file_path: ''
  keep_stdout: false

Options

This section describes the individual configuration options.

level

{{< confkey type="string" default="info" required="no" >}}

Defines the level of logs used by Authelia. This level can be set to trace, debug, info, warn, or error. When setting level to trace, you will generate a large amount of log entries and expose the /debug/vars and /debug/pprof/ endpoints which should not be enabled in production.

log:
  level: 'debug'

format

{{< confkey type="string" default="text" required="no" >}}

Defines the format of the logs written by Authelia. This format can be set to json or text.

log:
  format: 'json'

JSON format

{"level":"info","msg":"Logging severity set to info","time":"2020-01-01T00:00:00+11:00"}
{"level":"info","msg":"Authelia is listening for non-TLS connections on 0.0.0.0:{{< sitevar name="port" nojs="9091" >}}","time":"2020-01-01T00:00:00+11:00"}

Text format

time="2020-01-01T00:00:00+11:00" level=info msg="Logging severity set to info"
time="2020-01-01T00:00:00+11:00" level=info msg="Authelia is listening for non-TLS connections on 0.0.0.0:{{< sitevar name="port" nojs="9091" >}}"

file_path

{{< confkey type="string" required="no" >}}

Logs can be stored in a file when file path is provided. Otherwise logs are written to standard output. When setting the level to debug or trace this will generate large amount of log entries. Administrators will need to ensure that they rotate and/or truncate the logs over time to prevent significant long-term disk usage.

There are two replacements that exist in this string for the purpose of including the date. The %d value which just uses the RFC3339 layout, and the {datetime} replacement which by default uses the RFC3339 layout, but optionally can be suffixed with the Go Layout semantics in the format of {datetime:<layout>} where <layout> is the layout supported by Go.

When using a log file sending the Authelia process a SIGHUP will cause it to close and reopen the current log file and truncate it. This is useful for log rotation services which can force a reopen so the file descriptor open does not continue to append to the old log file.

File Path Examples

Standard Example:

log:
  file_path: '/config/authelia.log'

Date Time Example:

log:
  file_path: '/config/authelia.%d.log'

Date Time Example (with custom layout):

log:
  file_path: '/config/authelia.{datetime:Mon Jan 2 15:04:05 MST 2006}.log'

keep_stdout

{{< confkey type="boolean" default="false" required="no" >}}

Overrides the behavior to redirect logging only to the file_path. If set to true logs will be written to both standard output, and the defined logging location.

log:
  keep_stdout: true