Configuring Apache Cassandra event logging in KUMA

To configuring Apache Cassandra event logging in KUMA:

1. Make sure that the server where Apache Cassandra is installed has 5 GB of free disk space.
2. Connect to the Apache Cassandra server using an account with administrator rights.
3. Before making changes, create backup copies of the following configuration files:
   • /etc/cassandra/cassandra.yaml
   • /etc/cassandra/logback.xml
4. Make sure that the settings in the /etc/cassandra/cassandra.yaml configuration file have the following values; make changes if necessary:
   1. in the audit_logging_options section, set the enabled setting to true.
   2. in the logger section, set the class_name setting to FileAuditLogger.
5. Add the following lines to the /etc/cassandra/logback.xml configuration file:

   <!-- Audit Logging (FileAuditLogger) rolling file appender to audit.log -->

   <appender name="AUDIT" class="ch.qos.logback.core.rolling.RollingFileAppender">

   <file>${cassandra.logdir}/audit/audit.log</file>

   <rollingPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedRollingPolicy">

   <!-- rollover daily -->

   <fileNamePattern>${cassandra.logdir}/audit/audit.log.%d{yyyy-MM-dd}.%i.zip</fileNamePattern>

   <!-- each file should be at most 50MB, keep 30 days worth of history, but at most 5GB -->

   <maxFileSize>50MB</maxFileSize>

   <maxHistory>30</maxHistory>

   <totalSizeCap>5GB</totalSizeCap>

   </rollingPolicy>

   <encoder>

   <pattern>%-5level [%thread] %date{ISO8601} %F:%L - %replace(%msg){'\n', ' '}%n</pattern>

   </encoder>

   </appender>

   <!-- Audit Logging additivity to redirect audt logging events to audit/audit.log -->

   <logger name="org.apache.cassandra.audit" additivity="false" level="INFO">

   <appender-ref ref="AUDIT"/>

   </logger>

6. Save changes to the configuration file.
7. Restart the Apache Cassandra service using the following commands:
   1. sudo systemctl stop cassandra.service
   2. sudo systemctl start cassandra.service
8. After restarting, check the status of Apache Cassandra using the following command:

   sudo systemctl status cassandra.service

   Make sure that the command output contains the following sequence of characters:

   Active: active (running)

Apache Cassandra event export is configured. Events are located in the /var/log/cassandra/audit/ directory, in the audit.log file (${cassandra.logdir}/audit/audit.log).