This page explains tools that you can use to debug Container-Optimized OS.
Run the perf tool on Container-Optimized OS
By default, perf
is installed on Container-Optimized OS. You can run perf on your cos
instance from your shell command line.
If you have limited privilege, you might need to enable the use of the performance events system using the following command:
echo -1 | sudo tee /proc/sys/kernel/perf_event_paranoid
For information on how to use perf, refer to the
perf manual
and the kernel
sysctl settings.
Enable kernel crash dump collection
In the rare event of a kernel panic, enabling kernel crash dump collection can help you and Cloud Customer Care determine the root cause. To enable crash dumps, see User Guide: Kernel Crash Dump Collection for COS in the open source documentation. This user guide explains how to collect kernel crash dumps on GKE nodes with Container-Optimized OS or Container-Optimized OS instances created from Compute Engine.