Puppet Server Configuration Files: logback.xml
Puppet Server’s logging is routed through the Java Virtual Machine’s Logback library and configured in an XML file typically named
Note: This document covers basic, commonly modified options for Puppet Server logs. Logback is a powerful library with many options. For detailed information on configuring Logback, see the Logback Configuration Manual.
For advanced logging configuration tips specific to Puppet Server, such as configuring Logstash or outputting logs in JSON format, see Advanced Logging Configuration.
Puppet Server logging
By default, Puppet Server logs messages and errors to
/var/log/puppetlabs/puppetserver/puppetserver.log. The default log level is ‘INFO’, and Puppet Server sends nothing to
syslog. You can change Puppet Server’s logging behavior by editing
/etc/puppetlabs/puppetserver/logback.xml, and you can specify a different Logback config file in
You can restart the
puppetserver service for changes to take effect, or enable configuration scanning to allow changes to be recognized at runtime.
Puppet Server also relies on Logback to manage, rotate, and archive Server log files. Logback archives Server logs when they exceed 10MB, and when the total size of all Server logs exceeds 1GB, it automatically deletes the oldest logs.
To modify Puppet Server’s logging level, change the
level attribute of the
root element. By default, the logging level is set to
Supported logging levels, in order from most to least information logged, are
error. For instance, to enable debug logging for Puppet Server, change
Puppet Server profiling data is included at the
debug logging level.
You can also change the logging level for JRuby logging from its defaults of
info by setting the
level attribute of the
jruby element. For example, to enable debug logging for JRuby, set the attribute to
You can change the file to which Puppet Server writes its logs in the
appender section named
F1. By default, the location is set to
... <appender name="F1" class="ch.qos.logback.core.FileAppender"> <file>/var/log/puppetlabs/puppetserver/puppetserver.log</file> ...
To change this to
/var/log/puppetserver.log, modify the contents of the
The user account that owns the Puppet Server process must have write permissions to the destination path.
Logback supports noticing and reloading configuration changes without requiring a restart, a feature Logback calls scanning. To enable this, set the
scanPeriod attributes in the
<configuration> element of
logback.xml. Scanning can potentially degrade logging performance and is not enabled by default.
<configuration scan="true" scanPeriod="60 seconds">
Due to a bug in Logback, the
scanPeriod must be set to a value; setting only
scan="true" will not enable configuration scanning.
HTTP request logging
Puppet Server logs HTTP traffic separately, and this logging is configured in a different Logback configuration file located at
/etc/puppetlabs/puppetserver/request-logging.xml. To specify a different Logback configuration file, change the
access-log-config setting in Puppet Server’s
The HTTP request log uses the same Logback configuration format and settings as the Puppet Server log. It also lets you configure what it logs using patterns, which follow Logback’s