OpenShift Master: v3.9.0+ba7faec-1 Kubernetes Master: v1.9.1+a0ce1bc657 
deployed via the branded Ansible playbooks 

 
Metrics are installed as part of the ansible deployment via 
openshift_metrics_install_metrics=true and 
openshift_metrics_image_version=v3.9. The TTL value in hawkular-metrics pod is 
-Dhawkular.metrics.default-ttl=7, which, according to the documentation, should 
control the removal of any data from the Cassandra DB older than 7 days.

 
2+ months after the deploy I'm getting monitoring warnings that the Cassandra's 
PV usage grew over 20 Gb. I see that /cassandra_data directory inside the 
Cassandra pod contains fully loaded data folders going all the way back to the 
day of deployment - so, it appears that the Cassandra database is NOT 
automatically recycled as the documentation suggests it would. 

 
Are there additional flags that need to be turned on? Really puzzling as I 
don't see anyone reporting similar problems in 
https://github.com/openshift/origin-metrics/issues  

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