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mirror of https://github.com/GNS3/gns3-server synced 2024-12-25 16:28:11 +00:00

Idle-PC and auto idle-pc for Dynamips.

This commit is contained in:
Jeremy 2015-02-20 16:53:51 -07:00
parent 45a48cfcc1
commit af700e9bcb
2 changed files with 70 additions and 3 deletions

View File

@ -18,6 +18,7 @@
import os
import base64
import asyncio
from ..web.route import Route
from ..schemas.dynamips_vm import VM_CREATE_SCHEMA
from ..schemas.dynamips_vm import VM_UPDATE_SCHEMA
@ -366,7 +367,23 @@ class DynamipsVMHandler:
yield from vm.set_idlepc("0x0")
idlepcs = yield from vm.get_idle_pc_prop()
#idlepcs = yield from vm.show_idle_pc_prop()
response.set_status(200)
response.json({"idlepcs": idlepcs})
response.json(idlepcs)
@Route.get(
r"/projects/{project_id}/dynamips/vms/{vm_id}/auto_idlepc",
status_codes={
200: "Best Idle-pc value found",
400: "Invalid request",
404: "Instance doesn't exist"
},
description="Retrieve the idlepc proposals")
def get_auto_idlepc(request, response):
dynamips_manager = Dynamips.instance()
vm = dynamips_manager.get_vm(request.match_info["vm_id"],
project_id=request.match_info["project_id"])
idlepc = yield from dynamips_manager.auto_idlepc(vm)
response.set_status(200)
response.json({"idlepc": idlepc})

View File

@ -536,3 +536,53 @@ class Dynamips(BaseManager):
raise DynamipsError("Could not create config file {}: {}".format(path, e))
return os.path.join("configs", os.path.basename(path))
@asyncio.coroutine
def auto_idlepc(self, vm):
"""
Try to find the best possible idle-pc value.
:param vm: VM instance
"""
yield from vm.set_idlepc("0x0")
was_auto_started = False
try:
status = yield from vm.get_status()
if status != "running":
yield from vm.start()
was_auto_started = True
yield from asyncio.sleep(20) # leave time to the router to boot
validated_idlepc = None
idlepcs = yield from vm.get_idle_pc_prop()
if not idlepcs:
raise DynamipsError("No Idle-PC values found")
for idlepc in idlepcs:
yield from vm.set_idlepc(idlepc.split()[0])
log.debug("Auto Idle-PC: trying idle-PC value {}".format(vm.idlepc))
start_time = time.time()
initial_cpu_usage = yield from vm.get_cpu_usage()
log.debug("Auto Idle-PC: initial CPU usage is {}%".format(initial_cpu_usage))
yield from asyncio.sleep(3) # wait 3 seconds to probe the cpu again
elapsed_time = time.time() - start_time
cpu_usage = yield from vm.get_cpu_usage()
cpu_elapsed_usage = cpu_usage - initial_cpu_usage
cpu_usage = abs(cpu_elapsed_usage * 100.0 / elapsed_time)
if cpu_usage > 100:
cpu_usage = 100
log.debug("Auto Idle-PC: CPU usage is {}% after {:.2} seconds".format(cpu_usage, elapsed_time))
if cpu_usage < 70:
validated_idlepc = vm.idlepc
log.debug("Auto Idle-PC: idle-PC value {} has been validated".format(validated_idlepc))
break
if validated_idlepc is None:
raise DynamipsError("Sorry, no idle-pc value was suitable")
except DynamipsError:
raise
finally:
if was_auto_started:
yield from vm.stop()
return validated_idlepc