Configure logging

Configuring logging

The Identity component uses the Log4j2 framework to control the log level and log format.

The logging configuration that is included in the Identity image is:

<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN" monitorInterval="30">
    <Properties>
        <Property name="LOG_PATTERN">%clr{%d{yyyy-MM-dd HH:mm:ss.SSS}}{faint} %clr{%5p} %clr{${sys:PID}}{magenta}
            %clr{---}{faint} %clr{[%15.15t]}{faint} %clr{%-40.40c{1.}}{cyan} %clr{:}{faint} %m%n%xwEx
        </Property>
        <Property name="LOG_FILE_PATTERN">%d{yyyy-MM-dd HH:mm:ss.SSS} [%thread] %-5level %logger{1.} %enc{%msg}%n
        </Property>
        <Property name="LOG_FILE_NAME_PATTERN">logs/identity.%d{yyyy-MM-dd-mm-ss}.log</Property>
    </Properties>
    <Appenders>
        <Console name="Console" target="SYSTEM_OUT" follow="true">
            <PatternLayout pattern="${env:IDENTITY_LOG_PATTERN:-${LOG_PATTERN}}"/>
        </Console>
        <Console name="Stackdriver" target="SYSTEM_OUT" follow="true">
            <JsonTemplateLayout eventTemplateUri="classpath:GcpLayout.json" locationInfoEnabled="true"/>
        </Console>
        <RollingFile
                name="File"
                fileName="${env:IDENTITY_LOG_FILE_NAME:-logs/identity.log}"
                filePattern="${env:IDENTITY_LOG_FILE_NAME_PATTERN:-${LOG_FILE_NAME_PATTERN}}"
                append="true">
            <PatternLayout pattern="${env:IDENTITY_LOG_FILE_PATTERN:-${LOG_FILE_PATTERN}}"/>
            <Policies>
                <TimeBasedTriggeringPolicy interval="${env:IDENTITY_LOG_FILE_ROTATION_DAYS:-1}"/>
                <SizeBasedTriggeringPolicy size="${env:IDENTITY_LOG_FILE_ROTATION_SIZE:-50 MB}"/>
            </Policies>
        </RollingFile>
    </Appenders>
    <Loggers>
        <Logger name="io.camunda.identity" level="${env:IDENTITY_LOG_LEVEL:-info}"/>
        <Root level="warn">
            <AppenderRef ref="${env:IDENTITY_LOG_APPENDER:-Console}"/>
        </Root>
    </Loggers>
</Configuration>

General configuration options

Identity provides support for configuring the log level:

Environment variable	Accepted values
IDENTITY_LOG_LEVEL	OFF, FATAL, ERROR, WARN, INFO, DEBUG, TRACE, ALL

Supported logging outputs

As part of configuration Identity provides multiple appenders for outputting logs, to configure which logging appender is used, set the IDENTITY_LOG_APPENDER environment variable to one of the following Console, Stackdriver, or File:

Console

Console logging produces messages to standard output and is the default log appender. The Console log appender offers additional configuration options, these are:

Environment variable	Accepted values
IDENTITY_LOG_PATTERN	See the Log4j2 pattern layout docs for possible placeholders.

Stackdriver

The Stackdriver log appender produces messages to standard output in a format that is compatible with the GCP cloud platform.

This appender uses the GCP layout provided by the Log4j2 library.

File

The File log appender produces messages to a rotating log file. The File log appender offers additional configuration options, these are:

Environment variable	Accepted values
IDENTITY_LOG_FILE_PATTERN	See the Log4j2 pattern layout docs for possible placeholders.
IDENTITY_LOG_FILE_ROTATION_DAYS	See the Log4j2 time-based triggering policy -> interval for possible values.
IDENTITY_LOG_FILE_ROTATION_SIZE	See the Log4j2 size-bsed triggering policy for possible values.

Providing your own logging configuration

You can provide your own configuration by mounting a configuration file to the Identity container and setting the path to the file using the following variable:

Environment variable	Purpose
LOGGING_CONFIG	The path to your Log4j2 config XML file

note

To write logs to a file in a containerized environment, the mounted directory containing the log file has to be writable under the user running Identity.