Tip: Use oci cli to reboot a VM

oci compute instance action --action SOFTRESET --region us-ashburn-1 --instance-id  <instance id you can get from kubectl describe node>

oci compute instance get  --region us-ashburn-1 --instance-id  <instance id you can get from kubectl describe node>

sometimes, you may get 404 error if you omit " --region us-ashburn-1"