Minin中进程具有不同PID空间的主机

Question

我想在每个主机上以Mininet设置运行Quagga的实例。正如在下面的代码中实现的，我能够为每个主机挂载/tmp/<host>/etc/quagga作为/etc/quagga，在每个主机的目录（私有目录）中隔离配置文件。但是当我在每个主机中启动Quagga服务时（下面ipconf文件的最后一行），它们都共享相同的PID号，实际上为所有主机创建了相同的进程，尽管每个主机都有自己的Quagga配置文件。在

我希望有单独的Quagga实例，每个实例都有自己的PID。我怎样才能做到这一点？在

自定义拓扑文件my_topo.py:

from mininet.topo import Topo

class my_topo(Topo):
    "My custom topology settings"

    def __init__(self, enable_all=True):
        "Create custom topo."

        Topo.__init__(self)

        private_dirs = [("/etc/quagga", "/tmp/%(name)s/etc/quagga")]

        h1 = self.addHost("h1",
                          ip="172.31.1.100/24",
                          privateDirs=private_dirs)

        h2 = self.addHost("h2",
                          ip="172.31.2.100/24",
                          privateDirs=private_dirs)

        h3 = self.addHost("h3",
                          ip="172.31.3.100/24",
                          privateDirs=private_dirs)

        h4 = self.addHost("h4",
                          ip="172.31.4.100/24",
                          privateDirs=private_dirs)

        h5 = self.addHost("h5",
                          ip="172.32.1.2/30",
                          privateDirs=private_dirs)

        sA = self.addSwitch("s5")
        sB = self.addSwitch("s6")
        sC = self.addSwitch("s7")
        sD = self.addSwitch("s8")

        self.addLink(h1, sA)
        self.addLink(h2, sB)
        self.addLink(h3, sC)
        self.addLink(h4, sD)
        self.addLink(sA, sB)
        self.addLink(sB, sD)
        self.addLink(sD, sC)
        self.addLink(sC, sA)
        self.addLink(sA, sD)

        self.addLink(h2, h5, 1, 0)
        self.addLink(h4, h5, 1, 1)


topos = { "my_topo": ( lambda: my_topo() ) }

命令文件ipconf:

^{pr2}$

运行Mininet的命令：

sudo mn --custom mininet/custom/my_topo.py --topo=my_topo --controller=remote,ip=192.168.56.101,port=6633 --pre=ipconf

Answer 1

我自己想出了如何使用Mininext将进程与每个主机隔离开来，这是一个微型网的扩展，它在主机之间提供了更好的隔离。由于Mininext与Mininet的最新版本不兼容，我不得不按照Mininext存储库中的指示将后者降级到2.1.0版本。现在我可以很好地在每个主机上运行不同的Quagga实例。在

以下是使用Mininext库改编的拓扑代码，以防任何人面临相同的情况：

import inspect
import os
from mininext.topo import Topo
from mininext.services.quagga import QuaggaService
from collections import namedtuple

QuaggaHost = namedtuple('QuaggaHost', 'name ip lo gw')


class my_topo(Topo):
    'My custom topology settings'

    def __init__(self):
        Topo.__init__(self)

        self_path = os.path.dirname(os.path.abspath(
            inspect.getfile(inspect.currentframe())
        ))

        quagga_svc = QuaggaService(autoStop=False)

        quagga_base_config_path = self_path + '/configs/'

        quagga_hosts = []
        quagga_hosts.append(QuaggaHost(name='h1',
                                       ip='172.31.1.100/24',
                                       lo='10.0.1.1/24',
                                       gw='gw 172.31.1.1'))
        quagga_hosts.append(QuaggaHost(name='h2',
                                       ip='172.31.2.100/24',
                                       lo='10.0.2.1/24',
                                       gw='gw 172.31.2.1'))
        quagga_hosts.append(QuaggaHost(name='h3',
                                       ip='172.31.3.100/24',
                                       lo='10.0.3.1/24',
                                       gw='gw 172.31.3.1'))
        quagga_hosts.append(QuaggaHost(name='h4',
                                       ip='172.31.4.100/24',
                                       lo='10.0.4.1/24',
                                       gw='gw 172.31.4.1'))
        quagga_hosts.append(QuaggaHost(name='h5',
                                       ip='172.32.1.2/30',
                                       lo='10.0.5.1/24',
                                       gw='gw 172.32.1.1'))

        hosts = {}

        for host in quagga_hosts:
            quagga_container = self.addHost(name=host.name,
                                            ip=host.ip,
                                            defaultRoute=host.gw,
                                            hostname=host.name,
                                            privateLogDir=True,
                                            privateRunDir=True,
                                            inMountNamespace=True,
                                            inPIDNamespace=True,
                                            inUTSNamespace=True)
            hosts[host.name] = quagga_container

            self.addNodeLoopbackIntf(node=host.name, ip=host.lo)

            quagga_svc_config = \
                {'quaggaConfigPath': quagga_base_config_path + host.name}
            self.addNodeService(node=host.name, service=quagga_svc,
                                nodeConfig=quagga_svc_config)

        sA = self.addSwitch('s5')
        sB = self.addSwitch('s6')
        sC = self.addSwitch('s7')
        sD = self.addSwitch('s8')

        self.addLink(hosts['h1'], sA)
        self.addLink(hosts['h2'], sB)
        self.addLink(hosts['h3'], sC)
        self.addLink(hosts['h4'], sD)
        self.addLink(sA, sB)
        self.addLink(sB, sD)
        self.addLink(sD, sC)
        self.addLink(sC, sA)
        self.addLink(sA, sD)

        self.addLink(hosts['h2'], hosts['h5'], 1, 0)
        self.addLink(hosts['h4'], hosts['h5'], 1, 1)


topos = {'my_topo': (lambda: my_topo())}

Quagga配置文件必须放在configs目录中，该目录与拓扑文件位于同一目录中。configs为每个主机都有目录，就像每个主机都是/etc/quagga目录一样。在