Examples

Here are some configuration examples for the most common logging use cases:

Log to a file

Log the default log format to a file instead of to stdout (the default).

			logging:
  appenders:
    file:
      type: file
      fileName: /var/log/kibana.log
      layout:
        type: pattern
  root:
    appenders: [file]

		

Log in JSON format

Log the default log format to JSON layout instead of pattern (the default). With json layout, log messages will be formatted as JSON strings in ECS format that includes a timestamp, log level, logger, message text and any other metadata that may be associated with the log message itself.

			logging:
  appenders:
    json-layout:
      type: console
      layout:
        type: json
  root:
    appenders: [json-layout]

		

Log with meta to stdout

Include %meta in your pattern layout:

			logging:
  appenders:
    console-meta:
      type: console
      layout:
        type: pattern
        pattern: "[%date] [%level] [%logger] [%meta] %message"
  root:
    appenders: [console-meta]

		

Log Elasticsearch queries

			logging:
  appenders:
    console_appender:
      type: console
      layout:
        type: pattern
        highlight: true
  root:
    appenders: [console_appender]
    level: warn
  loggers:
    - name: elasticsearch.query
      level: debug

		

Change overall log level

			logging:
  root:
    level: debug

		

Customize specific log records

Here is a detailed configuration example that can be used to configure loggers, appenders and layouts:

			logging:
  appenders:
    console:
      type: console
      layout:
        type: pattern
        highlight: true
    file:
      type: file
      fileName: /var/log/kibana.log
    custom:
      type: console
      layout:
        type: pattern
        pattern: "[%date][%level] %message"
    json-file-appender:
      type: file
      fileName: /var/log/kibana-json.log
      layout:
        type: json

  root:
    appenders: [console, file]
    level: error

  loggers:
    - name: plugins
      appenders: [custom]
      level: warn
    - name: plugins.myPlugin
      level: info
    - name: server
      level: fatal
    - name: optimize
      appenders: [console]
    - name: telemetry
      appenders: [json-file-appender]
      level: all
    - name: metrics.ops
      appenders: [console]
      level: debug

		

Here is what we get with the config above:

Context name	Appenders	Level
root	console, file	error
plugins	custom	warn
plugins.myPlugin	custom	info
server	console, file	fatal
optimize	console	error
telemetry	json-file-appender	all
metrics.ops	console	debug