Opentack常用技巧

 

这篇博客将收集一些openstack里的使用技巧。

1. which dhcp agent is hosting the network?

  Opentack常用技巧_第1张图片

2. 各个网桥port命令规则

 Opentack常用技巧_第2张图片

    grep for port’s prefix:

    $ip address | grep e052edbb-94
    ... qbre052edbb-94: ...
    ... qvoe052edbb-94: ...
    ... qvbe052edbb-94: ...
    ... tape052edbb-94: ...

    

    tap device is the starting point

    qbr (Quantum bridge) is a Linux bridge, qbr bridge connected to tap and qvb

      $brctl show

      bridge name     bridge id         STP enabled   interfaces
      qbre052edbb-94   8000.8eb30d69e9bd   no        qvbe052edbb-94
                                      tape052edbb-94

    qvb (Quantum veth bridge) and qvo (Quantum veth openvswitch) form a Virtual Ethernet pair
      

      $ip -d link show qvoe052edbb-94
      ...
        veth
      $ip -d link show qvbe052edbb-94
      ...
        veth

    qvo device connected to br-int

      $ovs-vsctl list-ports br-int

      ...
      qvoe052edbb-94
      ...

    两个OVS网桥之间是用openvswitch的patch对组成的。    

    

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    $ip netns exec qdhcp-<network_id> ip address

      … tapXYZ …

    $ovs-vsctl list-ports br-int

     ...

     tapXYZ
     ...

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