mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-14 12:29:02 +00:00
Support for suspend to disk / resume (Qemu).
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parent
64949f5d04
commit
3d1ee4da3f
@ -31,6 +31,7 @@ import socket
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import gns3server
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import subprocess
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import time
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import json
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from gns3server.utils import parse_version
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from gns3server.utils.asyncio import subprocess_check_output, cancellable_wait_run_in_executor
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@ -116,6 +117,7 @@ class QemuVM(BaseNode):
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self._kernel_command_line = ""
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self._legacy_networking = False
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self._acpi_shutdown = False
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self._save_vm_state = False
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self._cpu_throttling = 0 # means no CPU throttling
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self._process_priority = "low"
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@ -594,6 +596,30 @@ class QemuVM(BaseNode):
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log.info('QEMU VM "{name}" [{id}] has disabled ACPI shutdown'.format(name=self._name, id=self._id))
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self._acpi_shutdown = acpi_shutdown
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@property
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def save_vm_state(self):
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"""
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Returns either this QEMU VM state can be saved.
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:returns: boolean
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"""
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return self._save_vm_state
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@save_vm_state.setter
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def save_vm_state(self, save_vm_state):
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"""
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Sets either this QEMU VM state can be saved.
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:param save_vm_state: boolean
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"""
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if save_vm_state:
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log.info('QEMU VM "{name}" [{id}] has enabled the save VM state option'.format(name=self._name, id=self._id))
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else:
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log.info('QEMU VM "{name}" [{id}] has disabled the save VM state option'.format(name=self._name, id=self._id))
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self._save_vm_state = save_vm_state
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@property
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def cpu_throttling(self):
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"""
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@ -1003,7 +1029,19 @@ class QemuVM(BaseNode):
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if self.is_running():
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log.info('Stopping QEMU VM "{}" PID={}'.format(self._name, self._process.pid))
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try:
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if self.acpi_shutdown:
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if self.save_vm_state:
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yield from self._control_vm("stop")
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yield from self._control_vm("savevm GNS3_SAVED_STATE")
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wait_for_savevm = 120
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while wait_for_savevm:
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yield from asyncio.sleep(1)
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status = yield from self._saved_state_option()
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wait_for_savevm -= 1
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if status != []:
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break
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if self.acpi_shutdown and not self.save_vm_state:
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yield from self._control_vm("system_powerdown")
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yield from gns3server.utils.asyncio.wait_for_process_termination(self._process, timeout=30)
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else:
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@ -1021,6 +1059,8 @@ class QemuVM(BaseNode):
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log.warning('QEMU VM "{}" PID={} is still running'.format(self._name, self._process.pid))
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self._process = None
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self._stop_cpulimit()
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if not self.save_vm_state:
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yield from self._clear_save_vm_stated()
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yield from super().stop()
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@asyncio.coroutine
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@ -1480,7 +1520,7 @@ class QemuVM(BaseNode):
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def _get_qemu_img(self):
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"""
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Search the qemu-img binary in the same binary of the qemu binary
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for avoiding version incompatibily.
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for avoiding version incompatibility.
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:returns: qemu-img path or raise an error
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"""
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@ -1814,6 +1854,57 @@ class QemuVM(BaseNode):
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return True
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return False
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@asyncio.coroutine
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def _clear_save_vm_stated(self, snapshot_name="GNS3_SAVED_STATE"):
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drives = ["a", "b", "c", "d"]
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qemu_img_path = self._get_qemu_img()
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for disk_index, drive in enumerate(drives):
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disk_image = getattr(self, "_hd{}_disk_image".format(drive))
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if not disk_image:
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continue
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try:
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if self.linked_clone:
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disk = os.path.join(self.working_dir, "hd{}_disk.qcow2".format(drive))
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else:
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disk = disk_image
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command = [qemu_img_path, "snapshot", "-c", snapshot_name, disk]
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retcode = yield from self._qemu_img_exec(command)
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if retcode:
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stdout = self.read_qemu_img_stdout()
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log.warning("Could not delete saved VM state from disk {}: {}".format(disk, stdout))
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else:
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log.info("Deleted saved VM state from disk {}".format(disk))
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except subprocess.SubprocessError as e:
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raise QemuError("Error while looking for the Qemu VM saved state snapshot: {}".format(e))
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@asyncio.coroutine
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def _saved_state_option(self, snapshot_name="GNS3_SAVED_STATE"):
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drives = ["a", "b", "c", "d"]
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qemu_img_path = self._get_qemu_img()
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for disk_index, drive in enumerate(drives):
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disk_image = getattr(self, "_hd{}_disk_image".format(drive))
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if not disk_image:
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continue
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try:
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if self.linked_clone:
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disk = os.path.join(self.working_dir, "hd{}_disk.qcow2".format(drive))
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else:
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disk = disk_image
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output = yield from subprocess_check_output(qemu_img_path, "info", "--output=json", disk)
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json_data = json.loads(output)
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if "snapshots" in json_data:
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for snapshot in json_data["snapshots"]:
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if snapshot["name"] == snapshot_name:
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log.info('QEMU VM "{name}" [{id}] VM saved state detected (snapshot name: {snapshot})'.format(name=self._name,
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id=self.id,
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snapshot=snapshot_name))
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return ["-loadvm", snapshot_name]
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except subprocess.SubprocessError as e:
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raise QemuError("Error while looking for the Qemu VM saved state snapshot: {}".format(e))
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return []
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@asyncio.coroutine
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def _build_command(self):
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"""
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@ -1860,6 +1951,11 @@ class QemuVM(BaseNode):
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command.extend(self._monitor_options())
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command.extend((yield from self._network_options()))
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command.extend(self._graphic())
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if not self.save_vm_state:
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yield from self._clear_save_vm_stated()
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else:
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command.extend((yield from self._saved_state_option()))
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if additional_options:
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try:
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command.extend(shlex.split(additional_options))
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@ -544,8 +544,8 @@ class QEMUHandler:
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def download_image(request, response):
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filename = request.match_info["filename"]
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iou_manager = Qemu.instance()
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image_path = iou_manager.get_abs_image_path(filename)
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qemu_manager = Qemu.instance()
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image_path = qemu_manager.get_abs_image_path(filename)
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# Raise error if user try to escape
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if filename[0] == ".":
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@ -188,6 +188,10 @@ QEMU_CREATE_SCHEMA = {
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"description": "ACPI shutdown support",
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"type": ["boolean", "null"],
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},
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"save_vm_state": {
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"description": "Save VM state support",
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"type": ["boolean", "null"],
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},
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"cpu_throttling": {
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"description": "Percentage of CPU allowed for QEMU",
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"minimum": 0,
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@ -373,6 +377,10 @@ QEMU_UPDATE_SCHEMA = {
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"description": "ACPI shutdown support",
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"type": ["boolean", "null"],
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},
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"save_vm_state": {
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"description": "Save VM state support",
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"type": ["boolean", "null"],
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},
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"cpu_throttling": {
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"description": "Percentage of CPU allowed for QEMU",
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"minimum": 0,
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@ -571,6 +579,10 @@ QEMU_OBJECT_SCHEMA = {
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"description": "ACPI shutdown support",
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"type": "boolean",
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},
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"save_vm_state": {
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"description": "Save VM state support",
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"type": ["boolean", "null"],
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},
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"cpu_throttling": {
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"description": "Percentage of CPU allowed for QEMU",
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"minimum": 0,
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@ -633,6 +645,7 @@ QEMU_OBJECT_SCHEMA = {
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"kernel_command_line",
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"legacy_networking",
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"acpi_shutdown",
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"save_vm_state",
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"cpu_throttling",
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"process_priority",
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"options",
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