OpenStack Invoke API for cloud host IO control, CGroup policy

# vim:tabstop=4 shiftwidth=4 softtabstop=4# Copyright (c) X.commerce, a business unit of EBay inc.# copyright U nited states government as represented by the# Administrator of the National Aeronautics and Space administration.# all Ri Ghts reserved.## Licensed under the Apache License, Version 2.0 (the "License"); You may# don't use this file except in compliance with the License. obtain# a copy of the License at## http://www.apache.org/licenses/LICENSE-2.0## unless required by a Pplicable law or agreed to in writing, software# distributed under the License are distributed on a "as is" BASIS, with out# warranties or CONDITIONS of any KIND, either express or implied. See the# License for the specific language governing permissions and limitations# under the license.# single Virt UAL machine io limit, reader 70/mb, writer 50/mb "" "curl-d ' {" auth ": {" Tenantname ":" admin "," passwordcredentials ": {"username": "admin", "password": "Admin"}}} '-H ' Content-type:application/json "Http://127.0.0.1:35357/v2.0/tokens | Python-m Json.tool curl-v-d ' {"ioctlaction": {"instance_name": "instance-0000000c", "Limit_reader": "40MB", "Limit_ Writer ": 60MB"} '-I http://127.0.0.1:8774/v2/ba5a6a86a8224a70ba0ffde747d8a724/servers/ E6b9cae7-8732-405d-9aaf-575643b4bbef/action-x post-h "x-auth-project-id:ba5a6a86a8224a70ba0ffde747d8a724"-H " Accept:application/json "-H" x-auth-token:6f0c37595f384fd4a18766825cf49013 "-H" Content-type:application/json "" " Import time,sys,os,libvirt,traceback,re,subprocess,jsonfrom Nova import log as Loggingfrom Nova import Flagsfrom Nova.periodic.blkio Import configfrom Nova import utilsfrom Nova.periodic.blkio import utils as Blkio_utilsflags = flags. Flagslog = Logging.getlogger (__name__) class Actionioctl (object): Def __init__ (self,instance_name,limit_reader,limit _writer): Self.conn = Libvirt.open (None) self.limitreader = Int (limit_reader[0:-2]) self.limitwriter = Int (Limit_wriTer[0:-2]) Self.name = instance_name Self.path = Flags.instances_path def diskdevicenum (self,disk):  "" "Func info:returns the number of hard Disk,other is 8:0" "" If disk = = '/DEV/SDA1 ' or disk = = '/dev/hda1 ' or Disk[:-1] = = '/DEV/SDA ' or disk[:-1] = = '/dev/hda ': Return ' 8:0 ' elif disk = = '/DEV/SDB1 ' or disk = = '/ DEV/HDB1 ' or disk[:-1] = = '/dev/sdb ' or disk[:-1] = = '/dev/hdb ': Return ' 8:16 ' elif disk = = '/DEV/SDC1 '  or disk = = '/DEV/HDC1 ' or disk[:-1] = = '/DEV/SDC ' or disk[:-1] = = '/DEV/HDC ': Return ' 8:32 ' elif disk = =        '/DEV/SDD1 ' or disk = = '/dev/hdd1 ' or disk[:-1] = = '/DEV/SDD ' or disk[:-1] = = '/DEV/HDD ': Return ' 8:48 '        Else:return ' 8:16 ' def Vmspidall (self): "" "Getting all VMS port, return to" "" pid = List () Try:cmds = "" "Ps-ef |grep uuid|grep-v grep |awk ' {print $} '" "" Pid=os.popen (CMDS). Readlin ES () return pID except Exception,e:log.error (_ (' [-william-] Error%s '%e) return def cgrouppath (self): "Func info:return Cgroup Path, Because the system is not the same, the Cgroup path                    is different also.            By default, with RedHat, Centos, Ubuntu Linux ... ostype:the current system version, and return to ...            Cpath:cgroup path ' osType = open ('/etc/issue '). ReadLines () for I in OsType: If Re.match (' Ubuntu ', i): CPath = '/sys/fs/cgroup/' return cpath elif re.match (' Ce                Ntos ', i): CPath = '/cgroup/' return cpath elif re.match (' Red Hat ', i): CPath = '/cgroup/' return cpath else:return '/sys/fs/cgroup/' def execmd (         SELF,CMDS): "Perform system Command" Log.info (_ (' execmd%s '%cmds)) Try:   Exec_process = subprocess. Popen (cmds, stdin = subprocess. PIPE, stdout = subprocess. PIPE, stderr = subprocess.             PIPE, Shell = True) exec_process.wait () rest = Exec_process.stdout.read ()                Err = Exec_process.stderr.read () If Err = = ': Return rest Else: Log.error (_ (' [-william-] return values is null ')) except Exception,e:log.error (_ (' [-william-] Er Ror%s ')%e) return ' geting vmName name and PID ' Def get_vm_pid (self,name): PID = Self.conn . Listdomainsid () Try:pid = Os.popen ("" "Ps-ef |grep%s |grep-v grep |awk ' {print $} '" "%name). Readli                                         NES () return int (pid[0]) Except:LOG.error (_ (' [-william-] Error%s ' %traceback.format_exc ())) Return Def _vm_pids (Self): Try:return os.popen (' pidof KVM '). Read (). Split () Except:return def work (sel        f): "" "Func info:working func ..... .....  Cpath:is _cpath function return values ... path:the current virtual machine IMG file path Vm_count:all        Of the current node number in virtual machines size:limit size mountinfo:mounting point "" " CPath = Self.cgrouppath () vm_pid = Self.get_vm_pid (Self.name) Log.info (_ (' [-William-]%s,%s '% (self).  NAME,VM_PID)) R_size = Self.limitreader * + * + w_size = self.limitwriter * + * device = Blkio_utils.instance_path (self.path) diskdevicenum = Self.diskdevicenum (device) Vmtaskpath = "%s/blkio/%s "% (cpath,self.name) utils.execute (" mkdir ","-P ", vmtaskpath,run_as_root=true) Utils.execute (" Tee ","%s/blkio. Throttle.read_bps_device "%vmtaskpath, process_input = "%s%s"% (diskdevicenum,r_size), run_as_root=true) Utils.execute ("Tee", "%S/BLKIO.THROTTLE.WR Ite_bps_device "%vmtaskpath, Process_input ="%s%s "% (diskdevicenum,w_size), RU N_as_root=true) Log.info (_ ("" "[-william-] echo '%s,%s,%s,%s,%s ' Write OK" ""% (Self.pat h, device, Diskdevicenum, W_size, r_size)) Utils.execute (' Tee ', '%s/tasks '%vmtaskpath, Proce ss_input= Str (vm_pid), Run_as_root=true) Log.info (_ (' [-william-] Append PID%s in task '%vm_ PID) If __name__ = = "__main__": sc = actionioctl (' instance-0000000c ', ' 40MB ', ' 30MB ') sc.work ()

This article from "Welcome comments, Welcome to like" blog, please be sure to keep this source http://swq499809608.blog.51cto.com/797714/1412022