TrueNAS k3s-server uses more than 10% CPU
The k3s supposed to be the lightweight k8s, but it used more than 10% when no container running. The problem was reported when TrueNAS running as VM.
This issue also caused high disk utilization, which caused whole system slow, huge IO wait.
Unset Pool
There is a zpool called ix-applications created for k3s. To stop k3s process, needs to unset pool in Apps => Settings => Unset Pool.
Result
After Unset Pool, the CPU utilization dropped from 70% to 5%.