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Code Issues Releases Wiki Activity

QEMU VM suspend/resume and reload

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This commit is contained in:
Dmitry Shmygov 2014-12-23 02:59:02 +03:00
parent 3590985c07
commit 84511d7b39
1 changed files with 62 additions and 4 deletions
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66
gns3server/modules/qemu/qemu_vm.py
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@ -26,6 +26,7 @@ import random
import subprocess
import shlex
import ntpath
import telnetlib
from gns3server.config import Config
from gns3dms.cloud.rackspace_ctrl import get_provider
@ -782,7 +783,13 @@ class QemuVM(object):
Starts this QEMU VM.
"""
if not self.is_running():
if self.is_running():
# resume the VM if it is paused
self.resume()
return
else:
if not os.path.isfile(self._qemu_path) or not os.path.exists(self._qemu_path):
found = False
@ -889,26 +896,77 @@ class QemuVM(object):
self._started = False
self._stop_cpulimit()
def _control_vm(self, command, expected=None, timeout=30):
"""
Executes a command with QEMU monitor when this VM is running.
:param command: QEMU monitor command (e.g. info status, stop etc.)
:param timeout: how long to wait for QEMU monitor
:returns: result of the command (string)
"""
result = None
if self.is_running() and self._monitor:
log.debug("Execute QEMU monitor command: {}".format(command))
tn = telnetlib.Telnet(self._monitor_host, self._monitor, timeout=timeout)
try:
tn.write(command.encode('ascii') + b"\n")
except OSError as e:
log.warn("Could not write to QEMU monitor: {}".format(e))
tn.close()
return result
if expected:
try:
ind, obj, dat = tn.expect(list=expected, timeout=timeout)
if ind >= 0:
result = expected[ind].decode('ascii')
except EOFError as e:
log.warn("Could not read from QEMU monitor: {}".format(e))
tn.close()
return result
def _get_vm_status(self):
"""
Returns this VM suspend status (running|paused)
:returns: status (string)
"""
result = self._control_vm("info status", [b"running", b"paused"])
return result
def suspend(self):
"""
Suspends this QEMU VM.
"""
pass
vm_status = self._get_vm_status()
if vm_status == "running":
self._control_vm("stop")
log.debug("QEMU VM has been suspended")
else:
log.info("QEMU VM is not running to be suspended, current status is {}".format(vm_status))
def reload(self):
"""
Reloads this QEMU VM.
"""
pass
self._control_vm("system_reset")
log.debug("QEMU VM has been reset")
def resume(self):
"""
Resumes this QEMU VM.
"""
pass
vm_status = self._get_vm_status()
if vm_status == "paused":
self._control_vm("cont")
log.debug("QEMU VM has been resumed")
else:
log.info("QEMU VM is not paused to be resumed, current status is {}".format(vm_status))
def port_add_nio_binding(self, adapter_id, nio):
"""