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Fixing race condition when starting the GNS3 VM.

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This commit is contained in:
grossmj 2018-01-10 16:22:55 +07:00
parent 5f14f8eb46
commit f9c7c15f95
4 changed files with 41 additions and 31 deletions
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1
gns3server/controller/__init__.py
View File

@ -405,6 +405,7 @@ class Controller:
:param connect: True connect to the compute immediately
:param kwargs: See the documentation of Compute
"""
if compute_id not in self._computes:
# We disallow to create from the outside the local and VM server

12
gns3server/controller/compute.py
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@ -377,13 +377,13 @@ class Compute:
"""
:param dont_connect: If true do not reconnect if not connected
"""
if not self._connected and not dont_connect:
if self._id == "vm" and not self._controller.gns3vm.running:
yield from self._controller.gns3vm.start()
yield from self.connect()
if not self._connected and not dont_connect:
raise ComputeError("Can't connect to {}".format(self._name))
raise ComputeError("Cannot connect to compute '{}' with request {} {}".format(self._name, method, path))
response = yield from self._run_http_query(method, path, data=data, **kwargs)
return response
@ -402,20 +402,20 @@ class Compute:
"""
Check if remote server is accessible
"""
if not self._connected and not self._closed:
try:
log.info("Connecting to compute '{}'".format(self._id))
response = yield from self._run_http_query("GET", "/capabilities")
except ComputeError:
except ComputeError as e:
# Try to reconnect after 2 seconds if server unavailable only if not during tests (otherwise we create a ressources usage bomb)
if not hasattr(sys, "_called_from_test") or not sys._called_from_test:
self._connection_failure += 1
# After 5 failure we close the project using the compute to avoid sync issues
if self._connection_failure == 5:
log.warning("Can't connect to compute %s", self._id)
log.warning("Cannot connect to compute '{}': {}".format(self._id, e))
yield from self._controller.close_compute_projects(self)
asyncio.get_event_loop().call_later(2, lambda: asyncio.async(self._try_reconnect()))
return
except aiohttp.web.HTTPNotFound:
raise aiohttp.web.HTTPConflict(text="The server {} is not a GNS3 server or it's a 1.X server".format(self._id))

57
gns3server/controller/gns3vm/__init__.py
View File

@ -27,6 +27,7 @@ from .virtualbox_gns3_vm import VirtualBoxGNS3VM
from .remote_gns3_vm import RemoteGNS3VM
from .gns3_vm_error import GNS3VMError
from ...version import __version__
from ..compute import ComputeError
import logging
log = logging.getLogger(__name__)
@ -281,7 +282,8 @@ class GNS3VM:
compute = yield from self._controller.add_compute(compute_id="vm",
name="GNS3 VM is starting ({})".format(engine.vmname),
host=None,
force=True)
force=True,
connect=False)
try:
yield from engine.start()
@ -290,6 +292,7 @@ class GNS3VM:
log.error("Can't start the GNS3 VM: {}".format(str(e)))
yield from compute.update(name="GNS3 VM ({})".format(engine.vmname))
raise e
yield from compute.connect() # we can connect now that the VM has started
yield from compute.update(name="GNS3 VM ({})".format(engine.vmname),
protocol=self.protocol,
host=self.ip_address,
@ -297,7 +300,9 @@ class GNS3VM:
user=self.user,
password=self.password)
yield from self._check_network(compute)
# check if the VM is in the same subnet as the local server, start 10 seconds later to give
# some time for the compute in the VM to be ready for requests
asyncio.get_event_loop().call_later(10, lambda: asyncio.async(self._check_network(compute)))
@asyncio.coroutine
def _check_network(self, compute):
@ -305,28 +310,32 @@ class GNS3VM:
Check that the VM is in the same subnet as the local server
"""
vm_interfaces = yield from compute.interfaces()
vm_interface_netmask = None
for interface in vm_interfaces:
if interface["ip_address"] == self.ip_address:
vm_interface_netmask = interface["netmask"]
break
if vm_interface_netmask:
vm_network = ipaddress.ip_interface("{}/{}".format(compute.host_ip, vm_interface_netmask)).network
for compute_id in self._controller.computes:
if compute_id == "local":
compute = self._controller.get_compute(compute_id)
interfaces = yield from compute.interfaces()
netmask = None
for interface in interfaces:
if interface["ip_address"] == compute.host_ip:
netmask = interface["netmask"]
break
if netmask:
compute_network = ipaddress.ip_interface("{}/{}".format(compute.host_ip, netmask)).network
if vm_network.compare_networks(compute_network) != 0:
msg = "The GNS3 VM ({}) is not on the same network as the {} server ({}), please make sure the local server binding is in the same network as the GNS3 VM".format(vm_network, compute_id, compute_network)
self._controller.notification.emit("log.warning", {"message": msg})
try:
vm_interfaces = yield from compute.interfaces()
vm_interface_netmask = None
for interface in vm_interfaces:
if interface["ip_address"] == self.ip_address:
vm_interface_netmask = interface["netmask"]
break
if vm_interface_netmask:
vm_network = ipaddress.ip_interface("{}/{}".format(compute.host_ip, vm_interface_netmask)).network
for compute_id in self._controller.computes:
if compute_id == "local":
compute = self._controller.get_compute(compute_id)
interfaces = yield from compute.interfaces()
netmask = None
for interface in interfaces:
if interface["ip_address"] == compute.host_ip:
netmask = interface["netmask"]
break
if netmask:
compute_network = ipaddress.ip_interface("{}/{}".format(compute.host_ip, netmask)).network
if vm_network.compare_networks(compute_network) != 0:
msg = "The GNS3 VM ({}) is not on the same network as the {} server ({}), please make sure the local server binding is in the same network as the GNS3 VM".format(
vm_network, compute_id, compute_network)
self._controller.notification.emit("log.warning", {"message": msg})
except ComputeError as e:
log.warning("Could not check the VM is in the same subnet as the local server: {}".format(e))
@locked_coroutine
def _suspend(self):

2
gns3server/controller/gns3vm/vmware_gns3_vm.py
View File

@ -171,7 +171,7 @@ class VMwareGNS3VM(BaseGNS3VM):
trial -= 1
# If ip not found fallback on old method
if trial == 0:
log.warn("No IP found for the VM via readVariable fallback to getGuestIPAddress")
log.warning("No IP found for the VM via readVariable fallback to getGuestIPAddress")
guest_ip_address = yield from self._execute("getGuestIPAddress", [self._vmx_path, "-wait"], timeout=120)
break
yield from asyncio.sleep(1)