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<a href="https://kubernetes.github.io/ingress-nginx" title="NGINX Ingress Controller" class="md-header-nav__button md-logo">
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<h1 id="basic-usage-host-based-routing">Basic usage - host based routing<a class="headerlink" href="#basic-usage-host-based-routing" title="Permanent link"></a></h1>
<p>ingress-nginx can be used for many use cases, inside various cloud provider and supports a lot of configurations. In this section you can find a common usage scenario where a single load balancer powered by ingress-nginx will route traffic to 2 different HTTP backend services based on the host name.</p>
<p>First of all follow the instructions to install ingress-nginx. Then imagine that you need to expose 2 HTTP services already installed: <code class="codehilite">myServiceA</code>, <code class="codehilite">myServiceB</code>. Let's say that you want to expose the first at <code class="codehilite">myServiceA.foo.org</code> and the second at <code class="codehilite">myServiceB.foo.org</code>. One possible solution is to create two <strong>ingress</strong> resources:</p>
<div class="codehilite"><pre><span></span><span class="n">apiVersion</span><span class="o">:</span> <span class="n">networking</span><span class="o">.</span><span class="na">k8s</span><span class="o">.</span><span class="na">io</span><span class="o">/</span><span class="n">v1beta1</span>
<p>First of all follow the instructions to install ingress-nginx. Then imagine that you need to expose 2 HTTP services already installed: <code class="codehilite"><span class="err">myServiceA</span></code>, <code class="codehilite"><span class="err">myServiceB</span></code>. Let's say that you want to expose the first at <code class="codehilite"><span class="err">myServiceA.foo.org</span></code> and the second at <code class="codehilite"><span class="err">myServiceB.foo.org</span></code>. One possible solution is to create two <strong>ingress</strong> resources:</p>
<div class="codehilite"><pre><span></span><code><span class="n">apiVersion</span><span class="o">:</span> <span class="n">networking</span><span class="o">.</span><span class="na">k8s</span><span class="o">.</span><span class="na">io</span><span class="o">/</span><span class="n">v1beta1</span>
<span class="n">kind</span><span class="o">:</span> <span class="n">Ingress</span>
<span class="n">metadata</span><span class="o">:</span>
<span class="n">name</span><span class="o">:</span> <span class="n">ingress</span><span class="o">-</span><span class="n">myServiceA</span>
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<span class="n">backend</span><span class="o">:</span>
<span class="n">serviceName</span><span class="o">:</span> <span class="n">myServiceB</span>
<span class="n">servicePort</span><span class="o">:</span> <span class="mi">80</span>
</pre></div>
</code></pre></div>
<p>When you apply this yaml, 2 ingress resources will be created managed by the <strong>ingress-nginx</strong> instance. Nginx is configured to automatically discover all ingress with the <code class="codehilite">kubernetes.io/ingress.class: &quot;nginx&quot;</code> annotation.
<p>When you apply this yaml, 2 ingress resources will be created managed by the <strong>ingress-nginx</strong> instance. Nginx is configured to automatically discover all ingress with the <code class="codehilite"><span class="err">kubernetes.io/ingress.class: &quot;nginx&quot;</span></code> annotation.
Please note that the ingress resource should be placed inside the same namespace of the backend resource.</p>
<p>On many cloud providers ingress-nginx will also create the corresponding Load Balancer resource. All you have to do is get the external IP and add a DNS <code class="codehilite">A record</code> inside your DNS provider that point myServiceA.foo.org and myServiceB.foo.org to the nginx external IP. Get the external IP by running:</p>
<div class="codehilite"><pre><span></span>kubectl get services -n ingress-nginx
</pre></div>
<p>On many cloud providers ingress-nginx will also create the corresponding Load Balancer resource. All you have to do is get the external IP and add a DNS <code class="codehilite"><span class="err">A record</span></code> inside your DNS provider that point myServiceA.foo.org and myServiceB.foo.org to the nginx external IP. Get the external IP by running:</p>
<div class="codehilite"><pre><span></span><code><span class="err">kubectl get services -n ingress-nginx</span>
</code></pre></div>
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