[Kimchi-devel] [RFC] Shutdown VM graceful

[Sheldon]

Currently, stopping guests in Kimchi is not graceful in the sense that 
the guest becomes 'shut down' immediately. This could be be problematic 
because guest file systems could become corrupted. Perhaps a warning 
should be added before a guest is immediately stopped or reset.

kimchi can does not support shutdown by agent, so we can not guarantee 
we can shutdown graceful.
User should install agent manully

We can use acpi shutdown a VM. But not all guest os will shutdown the VM 
even it receive acpi shutdown.

So I have 2 proposal:

1. only one shutdown API and one shutdown button for UI.
when user click shutdown, the backend will try to shutdown VM by acpi.
if 1 minutes timeout, kimchi will destroy the VM forcefully.

2. support ACPI shutdown and destroy two APIs. support "force off" and 
"shutdown" 2 buttons in UI.
"shutdown" means ACPI shutdown. but we can not guarantee it can shutdown 
the VM.
If the user find the VM is not shutdown for some time, he can try to 
force power off the VM


-- 
Thanks and best regards!

Sheldon Feng(冯少合)<shaohef at linux.vnet.ibm.com>
IBM Linux Technology Center