OCI- The root filesystem is periodically filling up to 100% space used

Applies To

Oracle Cloud Infrastructure

Linux x86-64

Symptoms

$ df -h | egrep "Filesystem|ocivolume-root"
Filesystem                  1K-blocks     Used         Available      Use%  Mounted on
/dev/mapper/ocivolume-root  118541968     118541960    0              100%    /

Cause

Application and other data is written to directories in the root filesystem.

The output from "du -sh /*" below (Some directories in the root filesystem are omitted for clarity) indicates the following non OS specific directories total 101G:

$ du -sh /*
5.1G /datalog
8.7G /software
4.8G /data1
22G /app
29G /app1
32G /datalog1

There are no filesystem mounts for any of the above, therefore any data written to these directories are writing to the root filesystem.

Solution