Stop and start an instance
Use one of the following methods to stop and start an
instance.
Pause and un-pause an instance
To pause and un-pause a server
To pause a server, run the following command:$ nova pause SERVER
This command stores the state of the VM in
RAM. A paused instance continues to run in a frozen
state.
To un-pause the server, run the following command:
$ nova unpause SERVER
Suspend and resume an instance
To suspend and resume a server
Administrative users might want to suspend an infrequently used
instance or to perform system maintenance.
When you suspend an instance, its VM state is stored on disk,
all memory is written to disk, and the virtual machine is
stopped. Suspending an instance is similar to placing a device
in hibernation; memory and vCPUs become available.To initiate a hypervisor-level suspend operation,
run the following command:
$ nova suspend SERVER
To resume a suspended server:
$ nova resume SERVER