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Date: Tue, 27 Mar 2018 16:50:26 GMT
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@@ -298,7 +329,7 @@ Content-Language: zh-CN
<p>那你知道ifconfig和ip addr的区别吗？这是一个有关net-tools和iproute2的“历史”故事，你刚来到第三节，暂时不用了解这么细，但这也是一个常考的知识点。</p>
<p>想象一下，你登录进入一个被裁剪过的非常小的Linux系统中，发现既没有ifconfig命令，也没有ip addr命令，你是不是感觉这个系统压根儿没法用？这个时候，你可以自行安装net-tools和iproute2这两个工具。当然，大多数时候这两个命令是系统自带的。</p>
<p>安装好后，我们来运行一下ip addr。不出意外，应该会输出下面的内容。</p>
<pre><code><a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="b9cbd6d6cdf9cddccacd">[email&#160;protected]</a>:~# ip addr
<pre><code><a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="88fae7e7fcc8fcedfbfc">[email&#160;protected]</a>:~# ip addr
1: lo: &lt;LOOPBACK,UP,LOWER_UP&gt; mtu 65536 qdisc noqueue state UNKNOWN group default
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
@@ -2607,7 +2638,7 @@ ovs-vsctl set Interface tap0 ingress_policing_burst=10000
<p>我们构建一个拓扑图，来看看OpenvSwitch的QoS是如何工作的。</p>
<p>首先，在port上可以创建QoS规则，一个QoS规则可以有多个队列Queue。</p>
<p><img src="assets/aafe1e0bfc6a87e3341b82485e41185b.jpg" alt="img" /></p>
<pre><code>ovs-vsctl set port first_br <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="51203e226c113f3426203e22">[email&#160;protected]</a> -- <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="86ababefe2bbc6e8e3f1f7e9f5">[email&#160;protected]</a> create qos type=linux-htb other-config:max-rate=10000000 <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="7f0e0a1a0a1a0c424f423f0e4f">[email&#160;protected]</a>,<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="16272b566727">[email&#160;protected]</a>,<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="754748350447">[email&#160;protected]</a> -- <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="b79a9aded38af7c687">[email&#160;protected]</a> create queue other-config:min-rate=3000000 other-config:max-rate=10000000 -- <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="83aeaeeae7bec3f2b2">[email&#160;protected]</a> create queue other-config:min-rate=1000000 other-config:max-rate=10000000 -- <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="8da0a0e4e9b0cdfcbf">[email&#160;protected]</a> create queue other-config:min-rate=6000000 other-config:max-rate=10000000
<pre><code>ovs-vsctl set port first_br <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="bccdd3cf81fcd2d9cbcdd3cf">[email&#160;protected]</a> -- <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="98b5b5f1fca5d8f6fdefe9f7eb">[email&#160;protected]</a> create qos type=linux-htb other-config:max-rate=10000000 <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="49383c2c3c2c3a747974093879">[email&#160;protected]</a>,<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="77464a370646">[email&#160;protected]</a>,<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="70424d300142">[email&#160;protected]</a> -- <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="2f0202464b126f5e1f">[email&#160;protected]</a> create queue other-config:min-rate=3000000 other-config:max-rate=10000000 -- <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="230e0e4a471e635212">[email&#160;protected]</a> create queue other-config:min-rate=1000000 other-config:max-rate=10000000 -- <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="3a1717535e077a4b08">[email&#160;protected]</a> create queue other-config:min-rate=6000000 other-config:max-rate=10000000
</code></pre>
<p>上面的命令创建了一个QoS规则，对应三个Queue。min-rate就是上面的rate，max-rate就是上面的ceil。通过交换机的网络包，要通过流表规则，匹配后进入不同的队列。然后我们就可以添加流表规则Flow(first_br是br0上的port 5)。</p>
<pre><code>ovs-ofctl add-flow br0 &quot;in_port=6 nw_src=192.168.100.100 actions=enqueue:5:0&quot;
@@ -3319,6 +3350,7 @@ soap:encodingStyle=&quot;http://www.w3.org/2001/12/soap-encoding&quot;&gt;
Host: www.geektime.com
Content-Type: application/xml; charset=utf-8
Content-Length: nnn
&lt;?xml version=&quot;1.0&quot;?&gt;
&lt;order&gt;
&lt;date&gt;2018-07-01&lt;/date&gt;
@@ -3332,6 +3364,7 @@ Content-Length: nnn
Host: www.geektime.com
Content-Type: application/json; charset=utf-8
Content-Length: nnn
{
&quot;order&quot;: {
&quot;date&quot;: &quot;2018-07-01&quot;,
@@ -3448,10 +3481,12 @@ C # object definition (#0)
x92 # two fields
x05 color # color field name
x05 model # model field name
O # object def (long form)
x90 # object definition #0
x03 red # color field value
x08 corvette # model field value
x60 # object def #0 (short form)
x05 green # color field value
x05 civic # model field value
@@ -3522,9 +3557,11 @@ message Order {
required string author = 3;
required int price = 4;
}
message OrderResponse {
required string message = 1;
}
service PurchaseOrder {
rpc Purchase (Order) returns (OrderResponse) {}
}
@@ -3893,21 +3930,25 @@ Content-Length: nnn
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