Symptoms
When a system generates and stores large core files, it can cause the system unstable.
Impact
F5OS core-writing script does not check filesystem availability before writing a core file and can fill up the filesystem, causing catastrophic system instability until disk-space is reclaimed.
For more information of other impacts see
1185577 - F5OS-A memory leak in ImageAgent process on rSeries hosts may affect tenant performance or lead to unexpected restarts of tenant or host
https://cdn.f5.com/product/bugtracker/ID1185577.html
1284705 - Appliance Orchestration Manager core file may consume entire root filesystem
https://cdn.f5.com/product/bugtracker/ID1284705.html
1290949 - Invalid memory read in appliance orchestration manager
https://cdn.f5.com/product/bugtracker/ID1290949.html
1327701 - Space in SNMP community/user/target name causing snmpd container restart
https://cdn.f5.com/product/bugtracker/ID1327701.html
Conditions
F5OS generates a large core file.
Fix Information
F5OS now takes into account the available filesystem space before writing a core file. If the core file is too large then it will be truncated and deleted to maintain system stability. The system log message will indicate if the core file was too large to safely write.
