Configure webapp log deletion

This section describes how to configure the Abiquo logs so that old webapp log files are periodically deleted. This will prevent problems due to lack of hard disk space.

Log files 

A current log is created for each webapp in the directory \{catalina.base}/logs/ 

In a standard install, this is /opt/abiquo/tomcat/logs. The logs are named after the webapps and renamed with date information when they are rotated.

In Abiquo 2.4, the logs are:

am.log
api.log
bpm-async.log
catalina.out
nodecollector.log
ssm.log
virtualfactory.log
vsm.log

The logback config file is in WEB-INF/classes in each webapp directory and can be edited.

For example, for the nodecollector* webapp, the default file would be /opt/abiquo/tomcat/webapps/nodecollector/WEB-INF/classes/logback.xml

(*Nodecollector is the name of the webapp for the Discovery Manager Remote Service). 

logback.xml Example

The following example shows the default logback configuration for nodecollector 

<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
  <fileNamePattern>${catalina.base}/logs/nodecollector-%d{yyyy-MM-dd}.%i.log</fileNamePattern>
  <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
    <maxFileSize>50MB</maxFileSize>
  </timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>

This configuration will rotate the logs daily or when the size of the file is larger than 50 MB.

However, the standard configuration shown above does not specify the maxHistory parameter (as described on http://logback.qos.ch/manual/appenders.html).

This means that the logs are kept indefinitely, which can cause the system disk to fill up.

Set the maxHistory size for each log file by adding a line after maxFileSize and changing the \{NUMBER OF FILES TO KEEP} as shown in the example below.

<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
  <fileNamePattern>${catalina.base}/logs/nodecollector-%d{yyyy-MM-dd}.%i.log</fileNamePattern>
  <timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
    <maxFileSize>50MB</maxFileSize>
    <maxHistory>{NUMBER OF FILES TO KEEP}</maxHistory>
  </timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>