Question

我想尝试OVS（软件Linux切换）http://openvswitch.org/和我的LXC容器，Ubuntu作为主机和访客。所以我安装了它：

# apt-get install openvswitch-switch

根据此文档https://infologs.wordpress.com/2015/06/19/how-to-attach-lxc-container-to-ovs-openvswitch/配置

创建测试容器：

# lxc-create -t ubuntu -n veth03-ovs -- -r trusty

创建ovs桥并为其分配IP：

# ovs-vsctl add-br switch0
# ip add add 192.168.100.1/24 dev switch0

让它成为新的网络192.168.100.0/24，并且switch0（根据我的理解）将是那里的第一个地址（网关）。

看起来很好：

# ip a
...
4: ovs-system: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default 
    link/ether 52:9d:e1:60:1d:56 brd ff:ff:ff:ff:ff:ff
5: switch0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default 
    link/ether 16:63:eb:47:13:41 brd ff:ff:ff:ff:ff:ff
    inet 192.168.100.1/24 scope global switch0
       valid_lft forever preferred_lft forever

桥接接口状态：

# ovs-vsctl show
1b236728-4637-42a5-8b81-53d4c93a6803
    Bridge "switch0"
        Port "switch0"
            Interface "switch0"
                type: internal
    ovs_version: "2.3.2"

使用此网桥编辑veth03-ovs容器的LXC配置：

# vim /var/lib/lxc/veth03-ovs/config
...
lxc.network.type = veth
lxc.network.flags = up

lxc.network.script.up = /etc/lxc/ifup
lxc.network.script.down = /etc/lxc/ifdown
# lxc.network.veth.pair = lxc0
lxc.network.hwaddr = 00:16:3e:15:b3:62
lxc.network.ipv4 = 192.168.100.10

所以我想为容器的内部接口指出192.168.100.10。

/ etc / lxc / ifup 和 / etc / lxc / ifdown 在启动/停止容器后添加/删除此网桥的端口。

# cat /etc/lxc/ifup
#!/bin/bash

BRIDGE=”switch0″
ovs-vsctl –may-exist add-br $BRIDGE
ovs-vsctl –if-exists del-port $BRIDGE $5
ovs-vsctl –may-exist add-port $BRIDGE $5

# cat /etc/lxc/ifdown 
#!/bin/bash
ovsBr=’switch0′
ovs-vsctl –if-exists del-port ${ovsBr} $5

所以现在我想开始容器，但得到：

# lxc-start -n veth03-ovs --logfile /tmp/log
lxc-start: lxc_start.c: main: 344 The container failed to start.
lxc-start: lxc_start.c: main: 346 To get more details, run the container in foreground mode.
lxc-start: lxc_start.c: main: 348 Additional information can be obtained by setting the --logfile and --logpriority options.

# cat /tmp/log
  lxc-start 1448974395.199 ERROR    lxc_conf - conf.c:run_buffer:342 - Script exited with status 1
  lxc-start 1448974395.225 ERROR    lxc_conf - conf.c:lxc_create_network:3079 - failed to create netdev
  lxc-start 1448974395.225 ERROR    lxc_start - start.c:lxc_spawn:950 - failed to create the network
  lxc-start 1448974395.225 ERROR    lxc_start - start.c:__lxc_start:1213 - failed to spawn 'veth03-ovs'
  lxc-start 1448974400.730 ERROR    lxc_start_ui - lxc_start.c:main:344 - The container failed to start.
  lxc-start 1448974400.730 ERROR    lxc_start_ui - lxc_start.c:main:346 - To get more details, run the container in foreground mode.
  lxc-start 1448974400.730 ERROR    lxc_start_ui - lxc_start.c:main:348 - Additional information can be obtained by setting the --logfile and --logpriority options.

我认为 lxc.network.script.up / lxc.network.script.down 脚本中的错误并没有获得$5参数，这应该是LXC传递给OVS的中间接口。但我不确定。

LXC是否支持Open vSwitch？ https://github.com/lxc/lxc/issues/256

Answer 1

这是我的坏事。我刚从Wordpress博客复制了ifup/ifdown个脚本。但有拼写错误：

ovs-vsctl –may-exist add-br $BRIDGE

但应该是：

ovs-vsctl --may-exist add-br $BRIDGE

--，而不仅仅是-之前的may。 ifup/ifdown脚本中的所有地方都一样。所以他们应该看起来像这样：

# cat /etc/lxc/ifup
#!/bin/bash

BRIDGE=switch0
ovs-vsctl --may-exist add-br $BRIDGE
ovs-vsctl --if-exists del-port $BRIDGE $5
ovs-vsctl --may-exist add-port $BRIDGE $5

# cat /etc/lxc/ifdown
#!/bin/bash
ovsBr=switch0
ovs-vsctl --if-exists del-port ${ovsBr} $5

带有Open vSwitch的LXC

1 个答案: