How can I re-direct cassandra logs to a different filesystem in Pega 7.2.2?
We have a separate filesystem for application logs and this is where we have PegaRULES, PegaRULES-ALERTS, etc. written to. However, the Cassandra logs are being written to the explicittempdir as defined in the Tomcat context.xml file. I assume that variable ${prpc.logdir} in the Cassandra logback.xml file is set to the explicittempdir and we could change it there; however, the logback.xml file gets overwritten on each restart.
How can I re-direct the Cassandra logs? Can this be done via prlogging.xml?
***Updated by moderator: Lochan to add Categories***
Pegasystems Inc.
US
try this command on the server to get info about your Cassandra process. It should show you your settings.
ps -ef | grep org.apache.cassandra.service.CassandraDaemon | grep -v grep
Key example settings :
-Dlogback.configurationFile=logback.xml
-Dcassandra.logdir=/usr/share/tomcat7/cassandra/logs
-Dcassandra.storagedir=/usr/share/tomcat7/cassandra/data
Sprint
US
Thanks for the feedback. I know where the Cassandra logs are written. My question is how to change the location.
-Dlogback.configurationFile=logback.xml
-Dcassandra.logdir=/tools/ews/tomcat8/3.1.0_SPRT_01/cassandra/logs
Note: The logs are not be written to the logdir location shown above. The logs are being written to
<fileNamePattern>${prpc.logdir}/Cassandra-%d{yyyy-MMM-dd}.log.%i</fileNamePattern>
where ${prpc.logdir} is apparently set to the Pega explicittempdir.
Pegasystems Inc.
US
Alex,
Check the logback.xml, which normally is located under <tomcat>/cassandra/conf directory, here is what OOTB looks like - I think you need to change the fileNamePattern to whenever desired.
*/
<configuration scan="true">
<jmxConfigurator />
<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${prpc.logdir}/Cassandra-%d{yyyy-MMM-dd}.log.%i</fileNamePattern>
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<maxFileSize>2MB</maxFileSize>
Alex,
Check the logback.xml, which normally is located under <tomcat>/cassandra/conf directory, here is what OOTB looks like - I think you need to change the fileNamePattern to whenever desired.
*/
<configuration scan="true">
<jmxConfigurator />
<appender name="FILE" class="ch.qos.logback.core.rolling.RollingFileAppender">
<rollingPolicy class="ch.qos.logback.core.rolling.TimeBasedRollingPolicy">
<fileNamePattern>${prpc.logdir}/Cassandra-%d{yyyy-MMM-dd}.log.%i</fileNamePattern>
<timeBasedFileNamingAndTriggeringPolicy class="ch.qos.logback.core.rolling.SizeAndTimeBasedFNATP">
<maxFileSize>2MB</maxFileSize>
</timeBasedFileNamingAndTriggeringPolicy>
</rollingPolicy>
<encoder>
<pattern>%-5level [%thread] %date{ISO8601} %F:%L - %msg%n</pattern>
<!-- old-style log format
<pattern>%5level [%thread] %date{ISO8601} %F (line %L) %msg%n</pattern>
-->
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="FILE" />
</root>
<logger name="com.thinkaurelius.thrift" level="ERROR"/>
</configuration>
Pegasystems Inc.
US
To add another point, this DSS setting may be required otherwise every server restart logback.xml will be regenerated without your changes.
<env name="dnode/overwrite_cassandra_logging" value="false"/>