mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-28 03:08:14 +00:00
Implements uBridge hypervisor.
This commit is contained in:
grossmj
parent
5125ddcde4
commit
1f890b4cad
@ -267,7 +267,7 @@ class VMwareHandler:
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if nio_type != "nio_udp":
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raise HTTPConflict(text="NIO of type {} is not supported".format(nio_type))
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nio = vmware_manager.create_nio(None, request.json)
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vm.adapter_add_nio_binding(int(request.match_info["adapter_number"]), nio)
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yield from vm.adapter_add_nio_binding(int(request.match_info["adapter_number"]), nio)
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response.set_status(201)
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response.json(nio)
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@ -290,5 +290,5 @@ class VMwareHandler:
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vmware_manager = VMware.instance()
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vm = vmware_manager.get_vm(request.match_info["vm_id"], project_id=request.match_info["project_id"])
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vm.adapter_remove_nio_binding(int(request.match_info["adapter_number"]))
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yield from vm.adapter_remove_nio_binding(int(request.match_info["adapter_number"]))
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response.set_status(204)
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@ -24,6 +24,7 @@ import subprocess
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import tempfile
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import asyncio
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from gns3server.utils.asyncio import wait_for_process_termination
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from .dynamips_hypervisor import DynamipsHypervisor
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from .dynamips_error import DynamipsError
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@ -146,7 +147,7 @@ class Hypervisor(DynamipsHypervisor):
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# time to delete UNIX NIOs for instance.
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yield from asyncio.sleep(0.01)
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try:
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yield from asyncio.wait_for(self._process.wait(), timeout=3)
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yield from wait_for_process_termination(self._process, timeout=3)
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except asyncio.TimeoutError:
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if self._process.returncode is None:
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log.warn("Dynamips process {} is still running... killing it".format(self._process.pid))
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@ -22,15 +22,12 @@ VMware VM instance.
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import sys
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import os
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import socket
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import subprocess
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import configparser
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import shutil
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import asyncio
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import tempfile
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import signal
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from gns3server.utils.asyncio import wait_for_process_termination
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from gns3server.utils.asyncio import monitor_process
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from pkg_resources import parse_version
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from gns3server.ubridge.hypervisor import Hypervisor
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from gns3server.utils.telnet_server import TelnetServer
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from gns3server.utils.interfaces import get_windows_interfaces
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from collections import OrderedDict
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@ -59,8 +56,7 @@ class VMwareVM(BaseVM):
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self._linked_clone = linked_clone
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self._vmx_pairs = OrderedDict()
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self._ubridge_process = None
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self._ubridge_stdout_file = ""
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self._ubridge_hypervisor = None
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self._telnet_server_thread = None
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self._serial_pipe = None
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self._vmnets = []
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@ -259,27 +255,23 @@ class VMwareVM(BaseVM):
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log.debug("disabling remaining adapter {}".format(adapter_number))
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self._vmx_pairs["ethernet{}.startconnected".format(adapter_number)] = "FALSE"
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self._update_ubridge_config()
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def _update_ubridge_config(self):
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"""
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Updates the ubrige.ini file.
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@asyncio.coroutine
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def _add_ubridge_connection(self, nio, adapter_number):
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"""
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Creates a connection in uBridge.
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ubridge_ini = os.path.join(self.working_dir, "ubridge.ini")
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config = configparser.ConfigParser()
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for adapter_number in range(0, self._adapters):
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nio = self._ethernet_adapters[adapter_number].get_nio(0)
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if nio:
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bridge_name = "bridge{}".format(adapter_number)
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:param nio: NIO instance
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:param adapter_number: adapter number
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"""
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vnet = "ethernet{}.vnet".format(adapter_number)
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if vnet not in self._vmx_pairs:
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continue
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raise VMwareError("vnet {} not in VMX file".format(vnet))
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yield from self._ubridge_hypervisor.send("bridge create {name}".format(name=vnet))
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vmnet_interface = os.path.basename(self._vmx_pairs[vnet])
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if sys.platform.startswith("linux"):
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config[bridge_name] = {"source_linux_raw": vmnet_interface}
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yield from self._ubridge_hypervisor.send('bridge add_nio_linux_raw {name} "{interface}"'.format(name=vnet,
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interface=vmnet_interface))
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elif sys.platform.startswith("win"):
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windows_interfaces = get_windows_interfaces()
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npf = None
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@ -289,29 +281,38 @@ class VMwareVM(BaseVM):
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elif vmnet_interface in interface["name"]:
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npf = interface["id"]
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if npf:
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config[bridge_name] = {"source_ethernet": '"' + npf + '"'}
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yield from self._ubridge_hypervisor.send('bridge add_nio_ethernet {name} "{interface}"'.format(name=vnet,
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interface=npf))
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else:
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raise VMwareError("Could not find NPF id for VMnet interface {}".format(vmnet_interface))
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else:
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config[bridge_name] = {"source_ethernet": vmnet_interface}
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yield from self._ubridge_hypervisor.send('bridge add_nio_ethernet {name} "{interface}"'.format(name=vnet,
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interface=vmnet_interface))
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if isinstance(nio, NIOUDP):
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udp_tunnel_info = {"destination_udp": "{lport}:{rhost}:{rport}".format(lport=nio.lport,
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yield from self._ubridge_hypervisor.send('bridge add_nio_udp {name} {lport} {rhost} {rport}'.format(name=vnet,
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lport=nio.lport,
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rhost=nio.rhost,
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rport=nio.rport)}
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config[bridge_name].update(udp_tunnel_info)
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rport=nio.rport))
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if nio.capturing:
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capture_info = {"pcap_file": "{pcap_file}".format(pcap_file=nio.pcap_output_file)}
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config[bridge_name].update(capture_info)
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yield from self._ubridge_hypervisor.send('bridge start_capture {name} "{pcap_file}"'.format(name=vnet,
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pcap_file=nio.pcap_output_file))
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try:
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with open(ubridge_ini, "w", encoding="utf-8") as config_file:
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config.write(config_file)
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log.info('VMware VM "{name}" [id={id}]: ubridge.ini updated'.format(name=self._name,
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id=self._id))
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except OSError as e:
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raise VMwareError("Could not create {}: {}".format(ubridge_ini, e))
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yield from self._ubridge_hypervisor.send('bridge start {name}'.format(name=vnet))
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@asyncio.coroutine
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def _delete_ubridge_connection(self, adapter_number):
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"""
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Deletes a connection in uBridge.
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:param adapter_number: adapter number
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"""
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vnet = "ethernet{}.vnet".format(adapter_number)
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if vnet not in self._vmx_pairs:
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raise VMwareError("vnet {} not in VMX file".format(vnet))
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yield from self._ubridge_hypervisor.send("bridge delete {name}".format(name=vnet))
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@property
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def ubridge_path(self):
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@ -332,74 +333,16 @@ class VMwareVM(BaseVM):
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Starts uBridge (handles connections to and from this VMware VM).
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"""
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try:
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# self._update_ubridge_config()
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command = [self.ubridge_path]
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log.info("starting ubridge: {}".format(command))
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self._ubridge_stdout_file = os.path.join(self.working_dir, "ubridge.log")
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log.info("logging to {}".format(self._ubridge_stdout_file))
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with open(self._ubridge_stdout_file, "w", encoding="utf-8") as fd:
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self._ubridge_process = yield from asyncio.create_subprocess_exec(*command,
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stdout=fd,
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stderr=subprocess.STDOUT,
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cwd=self.working_dir)
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server_config = self._manager.config.get_section_config("Server")
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server_host = server_config.get("host")
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self._ubridge_hypervisor = Hypervisor(self._project, self.ubridge_path, self.working_dir, server_host)
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#monitor_process(self._ubridge_process, self._termination_callback)
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log.info("ubridge started PID={}".format(self._ubridge_process.pid))
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except (OSError, subprocess.SubprocessError) as e:
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ubridge_stdout = self.read_ubridge_stdout()
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log.error("Could not start ubridge: {}\n{}".format(e, ubridge_stdout))
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raise VMwareError("Could not start ubridge: {}\n{}".format(e, ubridge_stdout))
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def _termination_callback(self, returncode):
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"""
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Called when the process has stopped.
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:param returncode: Process returncode
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"""
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log.info("uBridge process has stopped, return code: %d", returncode)
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if returncode != 0:
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self.project.emit("log.error", {"message": "uBridge process has stopped, return code: {}\n{}".format(returncode, self.read_ubridge_stdout())})
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def is_ubridge_running(self):
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"""
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Checks if the ubridge process is running
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:returns: True or False
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"""
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if self._ubridge_process and self._ubridge_process.returncode is None:
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return True
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return False
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def read_ubridge_stdout(self):
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"""
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Reads the standard output of the uBridge process.
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Only use when the process has been stopped or has crashed.
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"""
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output = ""
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if self._ubridge_stdout_file:
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try:
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with open(self._ubridge_stdout_file, "rb") as file:
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output = file.read().decode("utf-8", errors="replace")
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except OSError as e:
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log.warn("could not read {}: {}".format(self._ubridge_stdout_file, e))
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return output
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def _terminate_process_ubridge(self):
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"""
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Terminate the ubridge process if running.
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"""
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if self._ubridge_process:
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log.info('Stopping uBridge process for VMware VM "{}" PID={}'.format(self.name, self._ubridge_process.pid))
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try:
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self._ubridge_process.terminate()
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# Sometime the process can already be dead when we garbage collect
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except ProcessLookupError:
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pass
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log.info("Starting new uBridge hypervisor {}:{}".format(self._ubridge_hypervisor.host, self._ubridge_hypervisor.port))
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yield from self._ubridge_hypervisor.start()
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log.info("Hypervisor {}:{} has successfully started".format(self._ubridge_hypervisor.host, self._ubridge_hypervisor.port))
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yield from self._ubridge_hypervisor.connect()
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if parse_version(self._ubridge_hypervisor.version) < parse_version('0.9.1'):
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raise VMwareError("uBridge version must be >= 0.9.1, detected version is {}".format(self._ubridge_hypervisor.version))
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@asyncio.coroutine
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def start(self):
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@ -427,12 +370,17 @@ class VMwareVM(BaseVM):
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except OSError as e:
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raise VMwareError('Could not write VMware VMX file "{}": {}'.format(self._vmx_path, e))
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yield from self._start_ubridge()
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if self._headless:
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yield from self._control_vm("start", "nogui")
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else:
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yield from self._control_vm("start")
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yield from self._start_ubridge()
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for adapter_number in range(0, self._adapters):
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nio = self._ethernet_adapters[adapter_number].get_nio(0)
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if nio:
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yield from self._add_ubridge_connection(nio, adapter_number)
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if self._enable_remote_console and self._console is not None:
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yield from asyncio.sleep(1) # give some time to VMware to create the pipe file.
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self._start_remote_console()
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@ -447,15 +395,8 @@ class VMwareVM(BaseVM):
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"""
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self._stop_remote_console()
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if self.is_ubridge_running():
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self._terminate_process_ubridge()
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try:
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yield from wait_for_process_termination(self._ubridge_process, timeout=3)
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except asyncio.TimeoutError:
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if self._ubridge_process.returncode is None:
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log.warn("uBridge process {} is still running... killing it".format(self._ubridge_process.pid))
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self._ubridge_process.kill()
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self._ubridge_process = None
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if self._ubridge_hypervisor and self._ubridge_hypervisor.is_running():
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yield from self._ubridge_hypervisor.stop()
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try:
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if self.acpi_shutdown:
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@ -697,7 +638,7 @@ class VMwareVM(BaseVM):
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:param adapters: number of adapters
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"""
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# VMware VMs are limit to 10 adapters
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# VMware VMs are limited to 10 adapters
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if adapters > 10:
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raise VMwareError("Number of adapters above the maximum supported of 10")
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@ -757,20 +698,7 @@ class VMwareVM(BaseVM):
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log.info("VMware VM '{name}' [{id}] is not allowed to use any adapter".format(name=self.name, id=self.id))
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self._use_any_adapter = use_any_adapter
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def _reload_ubridge(self):
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"""
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Reloads ubridge.
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"""
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if self.is_ubridge_running():
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self._update_ubridge_config()
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if not sys.platform.startswith("win"):
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os.kill(self._ubridge_process.pid, signal.SIGHUP)
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else:
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# Windows doesn't support SIGHUP...
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self._terminate_process_ubridge()
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self._start_ubridge()
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@asyncio.coroutine
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def adapter_add_nio_binding(self, adapter_number, nio):
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"""
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Adds an adapter NIO binding.
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@ -786,13 +714,16 @@ class VMwareVM(BaseVM):
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adapter_number=adapter_number))
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adapter.add_nio(0, nio)
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if self._started:
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yield from self._add_ubridge_connection(nio, adapter_number)
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log.info("VMware VM '{name}' [{id}]: {nio} added to adapter {adapter_number}".format(name=self.name,
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id=self.id,
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nio=nio,
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adapter_number=adapter_number))
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self._reload_ubridge()
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@asyncio.coroutine
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def adapter_remove_nio_binding(self, adapter_number):
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"""
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Removes an adapter NIO binding.
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@ -812,13 +743,14 @@ class VMwareVM(BaseVM):
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if isinstance(nio, NIOUDP):
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self.manager.port_manager.release_udp_port(nio.lport, self._project)
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adapter.remove_nio(0)
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if self._started:
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yield from self._delete_ubridge_connection(adapter_number)
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log.info("VMware VM '{name}' [{id}]: {nio} removed from adapter {adapter_number}".format(name=self.name,
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id=self.id,
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nio=nio,
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adapter_number=adapter_number))
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self._reload_ubridge()
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return nio
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def _get_pipe_name(self):
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0
gns3server/ubridge/__init__.py
Normal file
0
gns3server/ubridge/__init__.py
Normal file
210
gns3server/ubridge/hypervisor.py
Normal file
210
gns3server/ubridge/hypervisor.py
Normal file
@ -0,0 +1,210 @@
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# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2015 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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Represents a uBridge hypervisor and starts/stops the associated uBridge process.
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"""
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import os
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import subprocess
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import asyncio
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import socket
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from gns3server.utils.asyncio import wait_for_process_termination
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from gns3server.utils.asyncio import monitor_process
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from .ubridge_hypervisor import UBridgeHypervisor
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from .ubridge_error import UbridgeError
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import logging
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log = logging.getLogger(__name__)
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class Hypervisor(UBridgeHypervisor):
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"""
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Hypervisor.
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:param project: Project instance
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:param path: path to uBridge executable
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:param working_dir: working directory
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:param host: host/address for this hypervisor
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:param port: port for this hypervisor
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"""
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_instance_count = 1
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def __init__(self, project, path, working_dir, host, port=None):
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if port is None:
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try:
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port = None
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info = socket.getaddrinfo(host, 0, socket.AF_UNSPEC, socket.SOCK_STREAM, 0, socket.AI_PASSIVE)
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if not info:
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raise UbridgeError("getaddrinfo returns an empty list on {}".format(host))
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for res in info:
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af, socktype, proto, _, sa = res
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# let the OS find an unused port for the uBridge hypervisor
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with socket.socket(af, socktype, proto) as sock:
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sock.bind(sa)
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port = sock.getsockname()[1]
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break
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except OSError as e:
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raise UbridgeError("Could not find free port for the uBridge hypervisor: {}".format(e))
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super().__init__(host, port)
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self._project = project
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self._path = path
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self._working_dir = working_dir
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self._command = []
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self._process = None
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self._stdout_file = ""
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self._started = False
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@property
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def process(self):
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"""
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Returns the subprocess of the Hypervisor
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:returns: subprocess
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"""
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return self._process
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@property
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def started(self):
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"""
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Returns either this hypervisor has been started or not.
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:returns: boolean
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"""
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return self._started
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@property
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def path(self):
|
||||
"""
|
||||
Returns the path to the uBridge executable.
|
||||
|
||||
:returns: path to uBridge
|
||||
"""
|
||||
|
||||
return self._path
|
||||
|
||||
@path.setter
|
||||
def path(self, path):
|
||||
"""
|
||||
Sets the path to the uBridge executable.
|
||||
|
||||
:param path: path to uBridge
|
||||
"""
|
||||
|
||||
self._path = path
|
||||
|
||||
@asyncio.coroutine
|
||||
def start(self):
|
||||
"""
|
||||
Starts the uBridge hypervisor process.
|
||||
"""
|
||||
|
||||
try:
|
||||
# self._update_ubridge_config()
|
||||
command = self._build_command()
|
||||
log.info("starting ubridge: {}".format(command))
|
||||
self._stdout_file = os.path.join(self._working_dir, "ubridge.log")
|
||||
log.info("logging to {}".format(self._stdout_file))
|
||||
with open(self._stdout_file, "w", encoding="utf-8") as fd:
|
||||
self._process = yield from asyncio.create_subprocess_exec(*command,
|
||||
stdout=fd,
|
||||
stderr=subprocess.STDOUT,
|
||||
cwd=self._working_dir)
|
||||
|
||||
monitor_process(self._process, self._termination_callback)
|
||||
log.info("ubridge started PID={}".format(self._process.pid))
|
||||
except (OSError, subprocess.SubprocessError) as e:
|
||||
ubridge_stdout = self.read_stdout()
|
||||
log.error("Could not start ubridge: {}\n{}".format(e, ubridge_stdout))
|
||||
raise UBridgeHypervisor("Could not start ubridge: {}\n{}".format(e, ubridge_stdout))
|
||||
|
||||
def _termination_callback(self, returncode):
|
||||
"""
|
||||
Called when the process has stopped.
|
||||
|
||||
:param returncode: Process returncode
|
||||
"""
|
||||
|
||||
log.info("uBridge process has stopped, return code: %d", returncode)
|
||||
if returncode != 0:
|
||||
self._project.emit("log.error", {"message": "uBridge process has stopped, return code: {}\n{}".format(returncode, self.read_stdout())})
|
||||
|
||||
@asyncio.coroutine
|
||||
def stop(self):
|
||||
"""
|
||||
Stops the uBridge hypervisor process.
|
||||
"""
|
||||
|
||||
if self.is_running():
|
||||
log.info("Stopping uBridge process PID={}".format(self._process.pid))
|
||||
yield from UBridgeHypervisor.stop(self)
|
||||
try:
|
||||
yield from wait_for_process_termination(self._process, timeout=3)
|
||||
except asyncio.TimeoutError:
|
||||
if self._process.returncode is None:
|
||||
log.warn("uBridge process {} is still running... killing it".format(self._process.pid))
|
||||
self._process.kill()
|
||||
|
||||
if self._stdout_file and os.access(self._stdout_file, os.W_OK):
|
||||
try:
|
||||
os.remove(self._stdout_file)
|
||||
except OSError as e:
|
||||
log.warning("could not delete temporary uBridge log file: {}".format(e))
|
||||
self._started = False
|
||||
|
||||
def read_stdout(self):
|
||||
"""
|
||||
Reads the standard output of the uBridge process.
|
||||
Only use when the process has been stopped or has crashed.
|
||||
"""
|
||||
|
||||
output = ""
|
||||
if self._stdout_file and os.access(self._stdout_file, os.R_OK):
|
||||
try:
|
||||
with open(self._stdout_file, "rb") as file:
|
||||
output = file.read().decode("utf-8", errors="replace")
|
||||
except OSError as e:
|
||||
log.warn("could not read {}: {}".format(self._stdout_file, e))
|
||||
return output
|
||||
|
||||
def is_running(self):
|
||||
"""
|
||||
Checks if the process is running
|
||||
|
||||
:returns: True or False
|
||||
"""
|
||||
|
||||
if self._process and self._process.returncode is None:
|
||||
return True
|
||||
return False
|
||||
|
||||
def _build_command(self):
|
||||
"""
|
||||
Command to start the uBridge hypervisor process.
|
||||
(to be passed to subprocess.Popen())
|
||||
"""
|
||||
|
||||
command = [self._path]
|
||||
command.extend(["-H", "{}:{}".format(self._host, self._port)])
|
||||
return command
|
||||
26
gns3server/ubridge/ubridge_error.py
Normal file
26
gns3server/ubridge/ubridge_error.py
Normal file
@ -0,0 +1,26 @@
|
||||
# -*- coding: utf-8 -*-
|
||||
#
|
||||
# Copyright (C) 2015 GNS3 Technologies Inc.
|
||||
#
|
||||
# This program is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
"""
|
||||
Custom exceptions for the ubridge.
|
||||
"""
|
||||
|
||||
|
||||
class UbridgeError(Exception):
|
||||
|
||||
def __init__(self, message):
|
||||
Exception.__init__(self, message)
|
||||
264
gns3server/ubridge/ubridge_hypervisor.py
Normal file
264
gns3server/ubridge/ubridge_hypervisor.py
Normal file
@ -0,0 +1,264 @@
|
||||
# -*- coding: utf-8 -*-
|
||||
#
|
||||
# Copyright (C) 2015 GNS3 Technologies Inc.
|
||||
#
|
||||
# This program is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
#
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU General Public License for more details.
|
||||
#
|
||||
# You should have received a copy of the GNU General Public License
|
||||
# along with this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
import re
|
||||
import time
|
||||
import logging
|
||||
import asyncio
|
||||
|
||||
from .ubridge_error import UbridgeError
|
||||
|
||||
log = logging.getLogger(__name__)
|
||||
|
||||
|
||||
class UBridgeHypervisor:
|
||||
|
||||
"""
|
||||
Creates a new connection to uBridge hypervisor.
|
||||
|
||||
:param host: the hostname or ip address string of the uBridge hypervisor
|
||||
:param port: the tcp port integer
|
||||
:param timeout: timeout integer for how long to wait for a response to commands sent to the
|
||||
hypervisor (defaults to 30 seconds)
|
||||
"""
|
||||
|
||||
# Used to parse Ubridge response codes
|
||||
error_re = re.compile(r"""^2[0-9]{2}-""")
|
||||
success_re = re.compile(r"""^1[0-9]{2}\s{1}""")
|
||||
|
||||
def __init__(self, host, port, timeout=30.0):
|
||||
|
||||
self._host = host
|
||||
self._port = port
|
||||
self._version = "N/A"
|
||||
self._timeout = timeout
|
||||
self._reader = None
|
||||
self._writer = None
|
||||
self._io_lock = asyncio.Lock()
|
||||
|
||||
@asyncio.coroutine
|
||||
def connect(self, timeout=10):
|
||||
"""
|
||||
Connects to the hypervisor.
|
||||
"""
|
||||
|
||||
# connect to a local address by default
|
||||
# if listening to all addresses (IPv4 or IPv6)
|
||||
if self._host == "0.0.0.0":
|
||||
host = "127.0.0.1"
|
||||
elif self._host == "::":
|
||||
host = "::1"
|
||||
else:
|
||||
host = self._host
|
||||
|
||||
begin = time.time()
|
||||
connection_success = False
|
||||
last_exception = None
|
||||
while time.time() - begin < timeout:
|
||||
yield from asyncio.sleep(0.01)
|
||||
try:
|
||||
self._reader, self._writer = yield from asyncio.open_connection(host, self._port)
|
||||
except OSError as e:
|
||||
last_exception = e
|
||||
continue
|
||||
connection_success = True
|
||||
break
|
||||
|
||||
if not connection_success:
|
||||
raise UbridgeError("Couldn't connect to hypervisor on {}:{} :{}".format(host, self._port, last_exception))
|
||||
else:
|
||||
log.info("Connected to uBridge hypervisor after {:.4f} seconds".format(time.time() - begin))
|
||||
|
||||
try:
|
||||
version = yield from self.send("hypervisor version")
|
||||
self._version = version[0].split("-", 1)[0]
|
||||
except IndexError:
|
||||
self._version = "Unknown"
|
||||
|
||||
@property
|
||||
def version(self):
|
||||
"""
|
||||
Returns uBridge version.
|
||||
|
||||
:returns: version string
|
||||
"""
|
||||
|
||||
return self._version
|
||||
|
||||
@asyncio.coroutine
|
||||
def close(self):
|
||||
"""
|
||||
Closes the connection to this hypervisor (but leave it running).
|
||||
"""
|
||||
|
||||
yield from self.send("hypervisor close")
|
||||
self._writer.close()
|
||||
self._reader, self._writer = None
|
||||
|
||||
@asyncio.coroutine
|
||||
def stop(self):
|
||||
"""
|
||||
Stops this hypervisor (will no longer run).
|
||||
"""
|
||||
|
||||
try:
|
||||
# try to properly stop the hypervisor
|
||||
yield from self.send("hypervisor stop")
|
||||
except UbridgeError:
|
||||
pass
|
||||
try:
|
||||
if self._writer is not None:
|
||||
yield from self._writer.drain()
|
||||
self._writer.close()
|
||||
except OSError as e:
|
||||
log.debug("Stopping hypervisor {}:{} {}".format(self._host, self._port, e))
|
||||
self._reader = self._writer = None
|
||||
|
||||
@asyncio.coroutine
|
||||
def reset(self):
|
||||
"""
|
||||
Resets this hypervisor (used to get an empty configuration).
|
||||
"""
|
||||
|
||||
yield from self.send("hypervisor reset")
|
||||
|
||||
@property
|
||||
def port(self):
|
||||
"""
|
||||
Returns the port used to start the hypervisor.
|
||||
|
||||
:returns: port number (integer)
|
||||
"""
|
||||
|
||||
return self._port
|
||||
|
||||
@port.setter
|
||||
def port(self, port):
|
||||
"""
|
||||
Sets the port used to start the hypervisor.
|
||||
|
||||
:param port: port number (integer)
|
||||
"""
|
||||
|
||||
self._port = port
|
||||
|
||||
@property
|
||||
def host(self):
|
||||
"""
|
||||
Returns the host (binding) used to start the hypervisor.
|
||||
|
||||
:returns: host/address (string)
|
||||
"""
|
||||
|
||||
return self._host
|
||||
|
||||
@host.setter
|
||||
def host(self, host):
|
||||
"""
|
||||
Sets the host (binding) used to start the hypervisor.
|
||||
|
||||
:param host: host/address (string)
|
||||
"""
|
||||
|
||||
self._host = host
|
||||
|
||||
@asyncio.coroutine
|
||||
def send(self, command):
|
||||
"""
|
||||
Sends commands to this hypervisor.
|
||||
|
||||
:param command: a uBridge hypervisor command
|
||||
|
||||
:returns: results as a list
|
||||
"""
|
||||
|
||||
# uBridge responses are of the form:
|
||||
# 1xx yyyyyy\r\n
|
||||
# 1xx yyyyyy\r\n
|
||||
# ...
|
||||
# 100-yyyy\r\n
|
||||
# or
|
||||
# 2xx-yyyy\r\n
|
||||
#
|
||||
# Where 1xx is a code from 100-199 for a success or 200-299 for an error
|
||||
# The result might be multiple lines and might be less than the buffer size
|
||||
# but still have more data. The only thing we know for sure is the last line
|
||||
# will begin with '100-' or a '2xx-' and end with '\r\n'
|
||||
|
||||
with (yield from self._io_lock):
|
||||
if self._writer is None or self._reader is None:
|
||||
raise UbridgeError("Not connected")
|
||||
|
||||
try:
|
||||
command = command.strip() + '\n'
|
||||
log.debug("sending {}".format(command))
|
||||
self._writer.write(command.encode())
|
||||
yield from self._writer.drain()
|
||||
except OSError as e:
|
||||
raise UbridgeError("Lost communication with {host}:{port} :{error}, Dynamips process running: {run}"
|
||||
.format(host=self._host, port=self._port, error=e, run=self.is_running()))
|
||||
|
||||
# Now retrieve the result
|
||||
data = []
|
||||
buf = ''
|
||||
while True:
|
||||
try:
|
||||
try:
|
||||
chunk = yield from self._reader.read(1024)
|
||||
except asyncio.CancelledError:
|
||||
# task has been canceled but continue to read
|
||||
# any remaining data sent by the hypervisor
|
||||
continue
|
||||
if not chunk:
|
||||
raise UbridgeError("No data returned from {host}:{port}, uBridge process running: {run}"
|
||||
.format(host=self._host, port=self._port, run=self.is_running()))
|
||||
buf += chunk.decode("utf-8")
|
||||
except OSError as e:
|
||||
raise UbridgeError("Lost communication with {host}:{port} :{error}, uBridge process running: {run}"
|
||||
.format(host=self._host, port=self._port, error=e, run=self.is_running()))
|
||||
|
||||
# If the buffer doesn't end in '\n' then we can't be done
|
||||
try:
|
||||
if buf[-1] != '\n':
|
||||
continue
|
||||
except IndexError:
|
||||
raise UbridgeError("Could not communicate with {host}:{port}, uBridge process running: {run}"
|
||||
.format(host=self._host, port=self._port, run=self.is_running()))
|
||||
|
||||
data += buf.split('\r\n')
|
||||
if data[-1] == '':
|
||||
data.pop()
|
||||
buf = ''
|
||||
|
||||
# Does it contain an error code?
|
||||
if self.error_re.search(data[-1]):
|
||||
raise UbridgeError(data[-1][4:])
|
||||
|
||||
# Or does the last line begin with '100-'? Then we are done!
|
||||
if data[-1][:4] == '100-':
|
||||
data[-1] = data[-1][4:]
|
||||
if data[-1] == 'OK':
|
||||
data.pop()
|
||||
break
|
||||
|
||||
# Remove success responses codes
|
||||
for index in range(len(data)):
|
||||
if self.success_re.search(data[index]):
|
||||
data[index] = data[index][4:]
|
||||
|
||||
log.debug("returned result {}".format(data))
|
||||
return data
|
||||
Loading…
Reference in New Issue
Block a user