Metrics pod in CrashLoopBackOff due to insufficient disk

Issue

• Cassandra pod crashing due to insufficient disk space in OpenShift

ERROR [MemtablePostFlush:3] 2020-10-10 05:03:11,331 CassandraDaemon.java:207 - Exception in thread Thread[MemtablePostFlush:3,5,main]
org.apache.cassandra.io.FSDiskFullWriteError: java.io.IOException: Insufficient disk space to write 27654544 bytes
        at org.apache.cassandra.db.Directories.getWriteableLocation(Directories.java:389) ~[apache-cassandra-3.0.15.redhat-1.jar:3.0.15.redhat-1
]
        at org.apache.cassandra.db.Memtable.flush(Memtable.java:323) ~[apache-cassandra-3.0.15.redhat-1.jar:3.0.15.redhat-1]
        at org.apache.cassandra.db.ColumnFamilyStore$Flush.run(ColumnFamilyStore.java:1066) ~[apache-cassandra-3.0.15.redhat-1.jar:3.0.15.redhat
-1]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) ~[na:1.8.0_252]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_252]
        at org.apache.cassandra.concurrent.NamedThreadFactory.lambda$threadLocalDeallocator$0(NamedThreadFactory.java:79) [apache-cassandra-3.0.15.redhat-1.jar:3.0.15.redhat-1]
        at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_252]
Caused by: java.io.IOException: Insufficient disk space to write 27654544 bytes