How to configure Tomcat log rotation

This article introduces how to use the logrotate tool provided by Linux system to achieve automatic rotation of Tomcat logs.

Step 1: Create or modify the logrotate configuration file

In the /etc/logrotate.d/ directory, create or modify a configuration file named tomcat (or other name you choose). Use the following command:

 sudo vim /etc/logrotate.d/tomcat

Step 2: Add or modify the configuration file content

Tomcat's catalina.out log file rotation in the configuration file:

 <code>/usr/local/tomcat/logs/catalina.out { daily rotate 7 compress missingok notifempty copytruncate }</code>

Parameter description:

• daily : Rotate once a day.
• rotate 7 : Keep the last 7 log files.
• compress : The log file after rotation is compressed ( .gz format).
• missingok : If the log file does not exist, the error is ignored.
• notifempty : Rotate only when the log file is not empty.
• copytruncate : Copy the current log file and then truncate the original file instead of directly deleting the original file.

Step 3: Test the configuration file

Before applying configuration, test whether the configuration file syntax is correct:

 logrotate -d /etc/logrotate.d/tomcat

If there is no error, the output displays "no errors".

Step 4: Reload the logrotate configuration

Use the following command to make the configuration take effect:

 sudo logrotate -f /etc/logrotate.d/tomcat

Or, restart the logrotate service:

 sudo systemctl restart logrotate

Step 5: Verify the configuration

Check the /usr/local/tomcat/logs/catalina.out file and its backup file to confirm whether the log rotation works as expected.

Rotation of other log files

For other Tomcat log files, you can create separate configuration files, or use scripts to manage log rotations for multiple applications. Please adjust the path in the configuration file according to the actual Tomcat installation path. This example assumes that Tomcat is installed in the /usr/local/tomcat directory.

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