initial commit after bringing over cleaned up code and testing some examples
This commit is contained in:
Blake J. Harnden
parent
c4858e6e0d
commit
00f4ebf5a9
93 changed files with 15189 additions and 13083 deletions
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@ -1,35 +1,37 @@
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#
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# CORE
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# Copyright (c)2010-2012 the Boeing Company.
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# See the LICENSE file included in this distribution.
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#
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# authors: Tom Goff <thomas.goff@boeing.com>
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# Jeff Ahrenholz <jeffrey.m.ahrenholz@boeing.com>
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#
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'''
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"""
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vnode.py: PyCoreNode and LxcNode classes that implement the network namespace
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virtual node.
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'''
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"""
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import os, signal, sys, subprocess, vnodeclient, threading, string, shutil
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import random, time
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from core.api import coreapi
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from core.misc.utils import *
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from core.constants import *
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from core.coreobj import PyCoreObj, PyCoreNode, PyCoreNetIf, Position
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from core.netns.vif import VEth, TunTap
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from core.emane.nodes import EmaneNode
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import os
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import random
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import shutil
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import signal
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import string
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import subprocess
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import threading
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from core import constants
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from core.coreobj import PyCoreNetIf
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from core.coreobj import PyCoreNode
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from core.enumerations import NodeTypes
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from core.misc import log
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from core.misc import nodeutils
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from core.misc import utils
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from core.netns import vnodeclient
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from core.netns.vif import TunTap
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from core.netns.vif import VEth
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logger = log.get_logger(__name__)
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utils.check_executables([constants.IP_BIN])
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checkexec([IP_BIN])
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class SimpleLxcNode(PyCoreNode):
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def __init__(self, session, objid = None, name = None, nodedir = None,
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verbose = False, start = True):
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PyCoreNode.__init__(self, session, objid, name, verbose=verbose,
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start=start)
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def __init__(self, session, objid=None, name=None, nodedir=None, start=True):
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PyCoreNode.__init__(self, session, objid, name, start=start)
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self.nodedir = nodedir
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self.ctrlchnlname = \
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os.path.abspath(os.path.join(self.session.sessiondir, self.name))
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self.ctrlchnlname = os.path.abspath(os.path.join(self.session.session_dir, self.name))
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self.vnodeclient = None
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self.pid = None
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self.up = False
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@ -44,68 +46,74 @@ class SimpleLxcNode(PyCoreNode):
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return True
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def startup(self):
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''' Start a new namespace node by invoking the vnoded process that
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allocates a new namespace. Bring up the loopback device and set
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the hostname.
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'''
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"""
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Start a new namespace node by invoking the vnoded process that
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allocates a new namespace. Bring up the loopback device and set
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the hostname.
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"""
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if self.up:
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raise Exception, "already up"
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vnoded = ["%s/vnoded" % CORE_SBIN_DIR, "-v", "-c", self.ctrlchnlname,
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raise Exception("already up")
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vnoded = ["%s/vnoded" % constants.CORE_SBIN_DIR, "-v", "-c", self.ctrlchnlname,
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"-l", self.ctrlchnlname + ".log",
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"-p", self.ctrlchnlname + ".pid"]
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if self.nodedir:
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vnoded += ["-C", self.nodedir]
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env = self.session.getenviron(state=False)
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env = self.session.get_environment(state=False)
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env['NODE_NUMBER'] = str(self.objid)
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env['NODE_NAME'] = str(self.name)
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try:
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tmp = subprocess.Popen(vnoded, stdout = subprocess.PIPE, env = env)
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except OSError, e:
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msg = "error running vnoded command: %s (%s)" % (vnoded, e)
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self.exception(coreapi.CORE_EXCP_LEVEL_FATAL,
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"SimpleLxcNode.startup()", msg)
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raise Exception, msg
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tmp = subprocess.Popen(vnoded, stdout=subprocess.PIPE, env=env)
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except OSError:
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msg = "error running vnoded command: %s" % vnoded
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logger.exception("SimpleLxcNode.startup(): %s", msg)
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raise Exception(msg)
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try:
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self.pid = int(tmp.stdout.read())
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tmp.stdout.close()
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except Exception:
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except ValueError:
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msg = "vnoded failed to create a namespace; "
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msg += "check kernel support and user priveleges"
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self.exception(coreapi.CORE_EXCP_LEVEL_FATAL,
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"SimpleLxcNode.startup()", msg)
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logger.exception("SimpleLxcNode.startup(): %s", msg)
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if tmp.wait():
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raise Exception, ("command failed: %s" % vnoded)
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self.vnodeclient = vnodeclient.VnodeClient(self.name,
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self.ctrlchnlname)
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self.info("bringing up loopback interface")
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self.cmd([IP_BIN, "link", "set", "lo", "up"])
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self.info("setting hostname: %s" % self.name)
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raise Exception("command failed: %s" % vnoded)
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self.vnodeclient = vnodeclient.VnodeClient(self.name, self.ctrlchnlname)
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logger.info("bringing up loopback interface")
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self.cmd([constants.IP_BIN, "link", "set", "lo", "up"])
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logger.info("setting hostname: %s" % self.name)
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self.cmd(["hostname", self.name])
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self.up = True
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def shutdown(self):
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if not self.up:
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return
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while self._mounts:
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source, target = self._mounts.pop(-1)
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self.umount(target)
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for netif in self.netifs():
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netif.shutdown()
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try:
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os.kill(self.pid, signal.SIGTERM)
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os.waitpid(self.pid, 0)
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except OSError:
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pass
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logger.exception("error killing process")
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try:
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os.unlink(self.ctrlchnlname)
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except OSError:
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pass
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logger.exception("error removing file")
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self._netif.clear()
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self.vnodeclient.close()
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self.up = False
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def cmd(self, args, wait = True):
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def cmd(self, args, wait=True):
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return self.vnodeclient.cmd(args, wait)
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def cmdresult(self, args):
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@ -117,93 +125,107 @@ class SimpleLxcNode(PyCoreNode):
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def icmd(self, args):
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return self.vnodeclient.icmd(args)
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def redircmd(self, infd, outfd, errfd, args, wait = True):
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def redircmd(self, infd, outfd, errfd, args, wait=True):
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return self.vnodeclient.redircmd(infd, outfd, errfd, args, wait)
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def term(self, sh = "/bin/sh"):
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return self.vnodeclient.term(sh = sh)
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def term(self, sh="/bin/sh"):
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return self.vnodeclient.term(sh=sh)
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def termcmdstring(self, sh = "/bin/sh"):
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return self.vnodeclient.termcmdstring(sh = sh)
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def termcmdstring(self, sh="/bin/sh"):
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return self.vnodeclient.termcmdstring(sh=sh)
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def shcmd(self, cmdstr, sh = "/bin/sh"):
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return self.vnodeclient.shcmd(cmdstr, sh = sh)
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def shcmd(self, cmdstr, sh="/bin/sh"):
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return self.vnodeclient.shcmd(cmdstr, sh=sh)
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def boot(self):
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pass
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def mount(self, source, target):
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source = os.path.abspath(source)
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self.info("mounting %s at %s" % (source, target))
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logger.info("mounting %s at %s" % (source, target))
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try:
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shcmd = "mkdir -p '%s' && %s -n --bind '%s' '%s'" % \
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(target, MOUNT_BIN, source, target)
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(target, constants.MOUNT_BIN, source, target)
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self.shcmd(shcmd)
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self._mounts.append((source, target))
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except:
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self.warn("mounting failed for %s at %s" % (source, target))
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logger.exception("mounting failed for %s at %s", source, target)
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def umount(self, target):
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self.info("unmounting '%s'" % target)
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logger.info("unmounting '%s'" % target)
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try:
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self.cmd([UMOUNT_BIN, "-n", "-l", target])
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self.cmd([constants.UMOUNT_BIN, "-n", "-l", target])
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except:
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self.warn("unmounting failed for %s" % target)
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logger.exception("unmounting failed for %s" % target)
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def newifindex(self):
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with self.lock:
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return PyCoreNode.newifindex(self)
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def newveth(self, ifindex = None, ifname = None, net = None):
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def newveth(self, ifindex=None, ifname=None, net=None):
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self.lock.acquire()
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try:
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if ifindex is None:
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ifindex = self.newifindex()
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if ifname is None:
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ifname = "eth%d" % ifindex
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sessionid = self.session.shortsessionid()
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sessionid = self.session.short_session_id()
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try:
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suffix = '%x.%s.%s' % (self.objid, ifindex, sessionid)
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except TypeError:
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suffix = '%s.%s.%s' % (self.objid, ifindex, sessionid)
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localname = 'veth' + suffix
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if len(localname) >= 16:
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raise ValueError, "interface local name '%s' too long" % \
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localname
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localname
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name = localname + 'p'
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if len(name) >= 16:
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raise ValueError, "interface name '%s' too long" % name
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ifclass = VEth
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veth = ifclass(node = self, name = name, localname = localname,
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mtu = 1500, net = net, start = self.up)
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veth = VEth(node=self, name=name, localname=localname, mtu=1500, net=net, start=self.up)
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if self.up:
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check_call([IP_BIN, "link", "set", veth.name,
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"netns", str(self.pid)])
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self.cmd([IP_BIN, "link", "set", veth.name, "name", ifname])
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subprocess.check_call([constants.IP_BIN, "link", "set", veth.name, "netns", str(self.pid)])
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self.cmd([constants.IP_BIN, "link", "set", veth.name, "name", ifname])
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veth.name = ifname
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# retrieve interface information
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result, output = self.cmdresult(["ip", "link", "show", veth.name])
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logger.info("interface command output: %s", output)
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output = output.split("\n")
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veth.flow_id = int(output[0].strip().split(":")[0]) + 1
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logger.info("interface flow index: %s - %s", veth.name, veth.flow_id)
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veth.hwaddr = output[1].strip().split()[1]
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logger.info("interface mac: %s - %s", veth.name, veth.hwaddr)
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try:
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self.addnetif(veth, ifindex)
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except:
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veth.shutdown()
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del veth
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raise
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return ifindex
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finally:
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self.lock.release()
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def newtuntap(self, ifindex = None, ifname = None, net = None):
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def newtuntap(self, ifindex=None, ifname=None, net=None):
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self.lock.acquire()
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try:
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if ifindex is None:
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ifindex = self.newifindex()
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if ifname is None:
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ifname = "eth%d" % ifindex
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sessionid = self.session.shortsessionid()
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sessionid = self.session.short_session_id()
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localname = "tap%s.%s.%s" % (self.objid, ifindex, sessionid)
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name = ifname
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ifclass = TunTap
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tuntap = ifclass(node = self, name = name, localname = localname,
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mtu = 1500, net = net, start = self.up)
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tuntap = ifclass(node=self, name=name, localname=localname,
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mtu=1500, net=net, start=self.up)
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try:
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self.addnetif(tuntap, ifindex)
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except:
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@ -217,50 +239,49 @@ class SimpleLxcNode(PyCoreNode):
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def sethwaddr(self, ifindex, addr):
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self._netif[ifindex].sethwaddr(addr)
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if self.up:
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(status, result) = self.cmdresult([IP_BIN, "link", "set", "dev",
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self.ifname(ifindex), "address", str(addr)])
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(status, result) = self.cmdresult([constants.IP_BIN, "link", "set", "dev",
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self.ifname(ifindex), "address", str(addr)])
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if status:
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self.exception(coreapi.CORE_EXCP_LEVEL_ERROR,
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"SimpleLxcNode.sethwaddr()",
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"error setting MAC address %s" % str(addr))
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logger.error("error setting MAC address %s", str(addr))
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def addaddr(self, ifindex, addr):
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if self.up:
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self.cmd([IP_BIN, "addr", "add", str(addr),
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"dev", self.ifname(ifindex)])
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self.cmd([constants.IP_BIN, "addr", "add", str(addr),
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"dev", self.ifname(ifindex)])
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self._netif[ifindex].addaddr(addr)
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def deladdr(self, ifindex, addr):
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try:
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self._netif[ifindex].deladdr(addr)
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except ValueError:
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self.warn("trying to delete unknown address: %s" % addr)
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logger.exception("trying to delete unknown address: %s" % addr)
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if self.up:
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self.cmd([IP_BIN, "addr", "del", str(addr),
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"dev", self.ifname(ifindex)])
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self.cmd([constants.IP_BIN, "addr", "del", str(addr), "dev", self.ifname(ifindex)])
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valid_deladdrtype = ("inet", "inet6", "inet6link")
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def delalladdr(self, ifindex, addrtypes = valid_deladdrtype):
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addr = self.getaddr(self.ifname(ifindex), rescan = True)
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def delalladdr(self, ifindex, addrtypes=valid_deladdrtype):
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addr = self.getaddr(self.ifname(ifindex), rescan=True)
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for t in addrtypes:
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if t not in self.valid_deladdrtype:
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raise ValueError, "addr type must be in: " + \
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" ".join(self.valid_deladdrtype)
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raise ValueError("addr type must be in: " + " ".join(self.valid_deladdrtype))
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for a in addr[t]:
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self.deladdr(ifindex, a)
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# update cached information
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self.getaddr(self.ifname(ifindex), rescan = True)
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self.getaddr(self.ifname(ifindex), rescan=True)
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def ifup(self, ifindex):
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if self.up:
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self.cmd([IP_BIN, "link", "set", self.ifname(ifindex), "up"])
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self.cmd([constants.IP_BIN, "link", "set", self.ifname(ifindex), "up"])
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def newnetif(self, net = None, addrlist = [], hwaddr = None,
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ifindex = None, ifname = None):
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def newnetif(self, net=None, addrlist=[], hwaddr=None,
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ifindex=None, ifname=None):
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self.lock.acquire()
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try:
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if isinstance(net, EmaneNode):
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ifindex = self.newtuntap(ifindex = ifindex, ifname = ifname,
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net = net)
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if nodeutils.is_node(net, NodeTypes.EMANE):
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ifindex = self.newtuntap(ifindex=ifindex, ifname=ifname,
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net=net)
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# TUN/TAP is not ready for addressing yet; the device may
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# take some time to appear, and installing it into a
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# namespace after it has been bound removes addressing;
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@ -268,18 +289,21 @@ class SimpleLxcNode(PyCoreNode):
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self.attachnet(ifindex, net)
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netif = self.netif(ifindex)
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netif.sethwaddr(hwaddr)
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for addr in maketuple(addrlist):
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for addr in utils.maketuple(addrlist):
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netif.addaddr(addr)
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return ifindex
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else:
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ifindex = self.newveth(ifindex = ifindex, ifname = ifname,
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net = net)
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ifindex = self.newveth(ifindex=ifindex, ifname=ifname, net=net)
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if net is not None:
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self.attachnet(ifindex, net)
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if hwaddr:
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self.sethwaddr(ifindex, hwaddr)
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for addr in maketuple(addrlist):
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for addr in utils.maketuple(addrlist):
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self.addaddr(ifindex, addr)
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self.ifup(ifindex)
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return ifindex
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finally:
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@ -291,44 +315,42 @@ class SimpleLxcNode(PyCoreNode):
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for x in xrange(tmplen)])
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tmp2 = "tmp." + "".join([random.choice(string.ascii_lowercase)
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for x in xrange(tmplen)])
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check_call([IP_BIN, "link", "add", "name", tmp1,
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"type", "veth", "peer", "name", tmp2])
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subprocess.check_call([constants.IP_BIN, "link", "add", "name", tmp1,
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"type", "veth", "peer", "name", tmp2])
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check_call([IP_BIN, "link", "set", tmp1, "netns", str(self.pid)])
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self.cmd([IP_BIN, "link", "set", tmp1, "name", ifname])
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subprocess.call([constants.IP_BIN, "link", "set", tmp1, "netns", str(self.pid)])
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self.cmd([constants.IP_BIN, "link", "set", tmp1, "name", ifname])
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self.addnetif(PyCoreNetIf(self, ifname), self.newifindex())
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check_call([IP_BIN, "link", "set", tmp2, "netns", str(othernode.pid)])
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othernode.cmd([IP_BIN, "link", "set", tmp2, "name", otherifname])
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subprocess.check_call([constants.IP_BIN, "link", "set", tmp2, "netns", str(othernode.pid)])
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othernode.cmd([constants.IP_BIN, "link", "set", tmp2, "name", otherifname])
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othernode.addnetif(PyCoreNetIf(othernode, otherifname),
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othernode.newifindex())
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def addfile(self, srcname, filename):
|
||||
shcmd = "mkdir -p $(dirname '%s') && mv '%s' '%s' && sync" % \
|
||||
(filename, srcname, filename)
|
||||
(filename, srcname, filename)
|
||||
self.shcmd(shcmd)
|
||||
|
||||
def getaddr(self, ifname, rescan = False):
|
||||
return self.vnodeclient.getaddr(ifname = ifname, rescan = rescan)
|
||||
def getaddr(self, ifname, rescan=False):
|
||||
return self.vnodeclient.getaddr(ifname=ifname, rescan=rescan)
|
||||
|
||||
def netifstats(self, ifname = None):
|
||||
return self.vnodeclient.netifstats(ifname = ifname)
|
||||
def netifstats(self, ifname=None):
|
||||
return self.vnodeclient.netifstats(ifname=ifname)
|
||||
|
||||
|
||||
class LxcNode(SimpleLxcNode):
|
||||
def __init__(self, session, objid = None, name = None,
|
||||
nodedir = None, bootsh = "boot.sh", verbose = False,
|
||||
start = True):
|
||||
super(LxcNode, self).__init__(session = session, objid = objid,
|
||||
name = name, nodedir = nodedir,
|
||||
verbose = verbose, start = start)
|
||||
def __init__(self, session, objid=None, name=None,
|
||||
nodedir=None, bootsh="boot.sh", start=True):
|
||||
super(LxcNode, self).__init__(session=session, objid=objid,
|
||||
name=name, nodedir=nodedir, start=start)
|
||||
self.bootsh = bootsh
|
||||
if start:
|
||||
self.startup()
|
||||
|
||||
def boot(self):
|
||||
self.session.services.bootnodeservices(self)
|
||||
|
||||
|
||||
def validate(self):
|
||||
self.session.services.validatenodeservices(self)
|
||||
|
||||
|
|
@ -339,10 +361,8 @@ class LxcNode(SimpleLxcNode):
|
|||
super(LxcNode, self).startup()
|
||||
self.privatedir("/var/run")
|
||||
self.privatedir("/var/log")
|
||||
except OSError, e:
|
||||
self.warn("Error with LxcNode.startup(): %s" % e)
|
||||
self.exception(coreapi.CORE_EXCP_LEVEL_ERROR,
|
||||
"LxcNode.startup()", "%s" % e)
|
||||
except OSError:
|
||||
logger.exception("error during LxcNode.startup()")
|
||||
finally:
|
||||
self.lock.release()
|
||||
|
||||
|
|
@ -351,7 +371,7 @@ class LxcNode(SimpleLxcNode):
|
|||
return
|
||||
self.lock.acquire()
|
||||
# services are instead stopped when session enters datacollect state
|
||||
#self.session.services.stopnodeservices(self)
|
||||
# self.session.services.stopnodeservices(self)
|
||||
try:
|
||||
super(LxcNode, self).shutdown()
|
||||
finally:
|
||||
|
|
@ -360,20 +380,20 @@ class LxcNode(SimpleLxcNode):
|
|||
|
||||
def privatedir(self, path):
|
||||
if path[0] != "/":
|
||||
raise ValueError, "path not fully qualified: " + path
|
||||
hostpath = os.path.join(self.nodedir,
|
||||
os.path.normpath(path).strip('/').replace('/', '.'))
|
||||
raise ValueError("path not fully qualified: %s" % path)
|
||||
hostpath = os.path.join(self.nodedir, os.path.normpath(path).strip('/').replace('/', '.'))
|
||||
|
||||
try:
|
||||
os.mkdir(hostpath)
|
||||
except OSError:
|
||||
pass
|
||||
except Exception, e:
|
||||
raise Exception, e
|
||||
logger.exception("error creating directory: %s", hostpath)
|
||||
|
||||
self.mount(hostpath, path)
|
||||
|
||||
def hostfilename(self, filename):
|
||||
''' Return the name of a node's file on the host filesystem.
|
||||
'''
|
||||
"""
|
||||
Return the name of a node's file on the host filesystem.
|
||||
"""
|
||||
dirname, basename = os.path.split(filename)
|
||||
if not basename:
|
||||
raise ValueError, "no basename for filename: " + filename
|
||||
|
|
@ -383,28 +403,27 @@ class LxcNode(SimpleLxcNode):
|
|||
dirname = os.path.join(self.nodedir, dirname)
|
||||
return os.path.join(dirname, basename)
|
||||
|
||||
def opennodefile(self, filename, mode = "w"):
|
||||
def opennodefile(self, filename, mode="w"):
|
||||
hostfilename = self.hostfilename(filename)
|
||||
dirname, basename = os.path.split(hostfilename)
|
||||
if not os.path.isdir(dirname):
|
||||
os.makedirs(dirname, mode = 0755)
|
||||
os.makedirs(dirname, mode=0755)
|
||||
return open(hostfilename, mode)
|
||||
|
||||
def nodefile(self, filename, contents, mode = 0644):
|
||||
def nodefile(self, filename, contents, mode=0644):
|
||||
f = self.opennodefile(filename, "w")
|
||||
f.write(contents)
|
||||
os.chmod(f.name, mode)
|
||||
f.close()
|
||||
self.info("created nodefile: '%s'; mode: 0%o" % (f.name, mode))
|
||||
|
||||
def nodefilecopy(self, filename, srcfilename, mode = None):
|
||||
''' Copy a file to a node, following symlinks and preserving metadata.
|
||||
logger.info("created nodefile: '%s'; mode: 0%o" % (f.name, mode))
|
||||
|
||||
def nodefilecopy(self, filename, srcfilename, mode=None):
|
||||
"""
|
||||
Copy a file to a node, following symlinks and preserving metadata.
|
||||
Change file mode if specified.
|
||||
'''
|
||||
"""
|
||||
hostfilename = self.hostfilename(filename)
|
||||
shutil.copy2(srcfilename, hostfilename)
|
||||
if mode is not None:
|
||||
os.chmod(hostfilename, mode)
|
||||
self.info("copied nodefile: '%s'; mode: %s" % (hostfilename, mode))
|
||||
|
||||
|
||||
logger.info("copied nodefile: '%s'; mode: %s" % (hostfilename, mode))
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue