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<!doctype html>
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<a href="#grpc" tabindex="0" class="md-skip">
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<div data-md-component="skip">
<a href="#grpc" class="md-skip">
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<div class="md-flex">
<div class="md-flex__cell md-flex__cell--shrink">
<a href="https://kubernetes.github.io/ingress-nginx" title="NGINX Ingress Controller" aria-label="NGINX Ingress Controller" class="md-header-nav__button md-logo">
<i class="md-icon">public</i>
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<div class="md-flex__cell md-flex__cell--shrink">
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<span class="md-header-nav__topic md-ellipsis">
NGINX Ingress Controller
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gRPC
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@ -172,45 +129,35 @@
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<div class="md-flex__cell md-flex__cell--shrink">
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<svg viewBox="0 0 24 24" width="24" height="24">
<use xlink:href="#__github" width="24" height="24"></use>
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<a href="https://github.com/kubernetes/ingress-nginx/" title="Go to repository" class="md-source">
<div class="md-source__icon md-icon">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M439.55 236.05L244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81z"/></svg>
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<nav class="md-nav md-nav--primary" data-md-level="0">
<label class="md-nav__title md-nav__title--site" for="__drawer">
<a href="https://kubernetes.github.io/ingress-nginx" title="NGINX Ingress Controller" class="md-nav__button md-logo">
<i class="md-icon">public</i>
<nav class="md-nav md-nav--primary" aria-label="Navigation" data-md-level="0">
<label class="md-nav__title" for="__drawer">
<a href="https://kubernetes.github.io/ingress-nginx" title="NGINX Ingress Controller" class="md-nav__button md-logo" aria-label="NGINX Ingress Controller">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12,8A3,3 0 0,0 15,5A3,3 0 0,0 12,2A3,3 0 0,0 9,5A3,3 0 0,0 12,8M12,11.54C9.64,9.35 6.5,8 3,8V19C6.5,19 9.64,20.35 12,22.54C14.36,20.35 17.5,19 21,19V8C17.5,8 14.36,9.35 12,11.54Z" /></svg>
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<use xlink:href="#__github" width="24" height="24"></use>
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<div class="md-source__icon md-icon">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M439.55 236.05L244 40.45a28.87 28.87 0 0 0-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 0 1-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 0 0 0 40.81l195.61 195.6a28.86 28.86 0 0 0 40.8 0l194.69-194.69a28.86 28.86 0 0 0 0-40.81z"/></svg>
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<label class="md-nav__link" for="nav-1">
Welcome
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M8.59,16.58L13.17,12L8.59,7.41L10,6L16,12L10,18L8.59,16.58Z" /></svg>
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<nav class="md-nav" aria-label="Welcome" data-md-level="1">
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<span class="md-nav__icon md-icon">
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20,11V13H8L13.5,18.5L12.08,19.92L4.16,12L12.08,4.08L13.5,5.5L8,11H20Z" /></svg>
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<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20,11V13H8L13.5,18.5L12.08,19.92L4.16,12L12.08,4.08L13.5,5.5L8,11H20Z" /></svg>
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@ -1286,7 +1281,12 @@
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<a href="https://github.com/kubernetes/ingress-nginx/edit/master/docs/examples/grpc/README.md" title="Edit this page" class="md-icon md-content__icon">&#xE3C9;</a>
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<h1 id="grpc">gRPC<a class="headerlink" href="#grpc" title="Permanent link"></a></h1>
@ -1295,9 +1295,9 @@ nginx controller.</p>
<h2 id="prerequisites">Prerequisites<a class="headerlink" href="#prerequisites" title="Permanent link"></a></h2>
<ol>
<li>You have a kubernetes cluster running.</li>
<li>You have a domain name such as <code class="codehilite"><span class="err">example.com</span></code> that is configured to route
<li>You have a domain name such as <code>example.com</code> that is configured to route
traffic to the ingress controller. Replace references to
<code class="codehilite"><span class="err">fortune-teller.stack.build</span></code> (the domain name used in this example) to your
<code>fortune-teller.stack.build</code> (the domain name used in this example) to your
own domain name (you're also responsible for provisioning an SSL certificate
for the ingress).</li>
<li>You have the nginx-ingress controller installed in typical fashion (must be
@ -1309,16 +1309,16 @@ nginx controller.</p>
<a href="https://github.com/kubernetes/ingress-nginx/tree/master/images/grpc-fortune-teller">fortune-teller</a>
application provided here as an example.</li>
</ol>
<h3 id="step-1-kubernetes-deployment">Step 1: kubernetes <code class="codehilite"><span class="err">Deployment</span></code><a class="headerlink" href="#step-1-kubernetes-deployment" title="Permanent link"></a></h3>
<div class="codehilite"><pre><span></span><code>$ kubectl create -f app.yaml
<h3 id="step-1-kubernetes-deployment">Step 1: kubernetes <code>Deployment</code><a class="headerlink" href="#step-1-kubernetes-deployment" title="Permanent link"></a></h3>
<div class="highlight"><pre><span></span><code>$ kubectl create -f app.yaml
</code></pre></div>
<p>This is a standard kubernetes deployment object. It is running a grpc service
listening on port <code class="codehilite"><span class="err">50051</span></code>.</p>
listening on port <code>50051</code>.</p>
<p>The sample application
<a href="https://github.com/kubernetes/ingress-nginx/tree/master/images/grpc-fortune-teller">fortune-teller-app</a>
is a grpc server implemented in go. Here's the stripped-down implementation:</p>
<div class="codehilite"><pre><span></span><code><span class="kd">func</span> <span class="nx">main</span><span class="p">()</span> <span class="p">{</span>
<div class="highlight"><pre><span></span><code><span class="kd">func</span> <span class="nx">main</span><span class="p">()</span> <span class="p">{</span>
<span class="nx">grpcServer</span> <span class="o">:=</span> <span class="nx">grpc</span><span class="p">.</span><span class="nx">NewServer</span><span class="p">()</span>
<span class="nx">fortune</span><span class="p">.</span><span class="nx">RegisterFortuneTellerServer</span><span class="p">(</span><span class="nx">grpcServer</span><span class="p">,</span> <span class="o">&amp;</span><span class="nx">FortuneTeller</span><span class="p">{})</span>
<span class="nx">lis</span><span class="p">,</span> <span class="nx">_</span> <span class="o">:=</span> <span class="nx">net</span><span class="p">.</span><span class="nx">Listen</span><span class="p">(</span><span class="s">&quot;tcp&quot;</span><span class="p">,</span> <span class="s">&quot;:50051&quot;</span><span class="p">)</span>
@ -1331,33 +1331,33 @@ are terminating TLS at the ingress level, grpc traffic will travel unencrypted
inside the cluster and arrive "insecure").</p>
<p>For your own application you may or may not want to do this. If you prefer to
forward encrypted traffic to your POD and terminate TLS at the gRPC server
itself, add the ingress annotation <code class="codehilite"><span class="err">nginx.ingress.kubernetes.io/backend-protocol: &quot;GRPCS&quot;</span></code>.</p>
<h3 id="step-2-the-kubernetes-service">Step 2: the kubernetes <code class="codehilite"><span class="err">Service</span></code><a class="headerlink" href="#step-2-the-kubernetes-service" title="Permanent link"></a></h3>
<div class="codehilite"><pre><span></span><code>$ kubectl create -f svc.yaml
itself, add the ingress annotation <code>nginx.ingress.kubernetes.io/backend-protocol: "GRPCS"</code>.</p>
<h3 id="step-2-the-kubernetes-service">Step 2: the kubernetes <code>Service</code><a class="headerlink" href="#step-2-the-kubernetes-service" title="Permanent link"></a></h3>
<div class="highlight"><pre><span></span><code>$ kubectl create -f svc.yaml
</code></pre></div>
<p>Here we have a typical service. Nothing special, just routing traffic to the
backend application on port <code class="codehilite"><span class="err">50051</span></code>.</p>
<h3 id="step-3-the-kubernetes-ingress">Step 3: the kubernetes <code class="codehilite"><span class="err">Ingress</span></code><a class="headerlink" href="#step-3-the-kubernetes-ingress" title="Permanent link"></a></h3>
<div class="codehilite"><pre><span></span><code>$ kubectl create -f ingress.yaml
backend application on port <code>50051</code>.</p>
<h3 id="step-3-the-kubernetes-ingress">Step 3: the kubernetes <code>Ingress</code><a class="headerlink" href="#step-3-the-kubernetes-ingress" title="Permanent link"></a></h3>
<div class="highlight"><pre><span></span><code>$ kubectl create -f ingress.yaml
</code></pre></div>
<p>A few things to note:</p>
<ol>
<li>We've tagged the ingress with the annotation
<code class="codehilite"><span class="err">nginx.ingress.kubernetes.io/backend-protocol: &quot;GRPC&quot;</span></code>. This is the magic
<code>nginx.ingress.kubernetes.io/backend-protocol: "GRPC"</code>. This is the magic
ingredient that sets up the appropriate nginx configuration to route http/2
traffic to our service.</li>
<li>We're terminating TLS at the ingress and have configured an SSL certificate
<code class="codehilite"><span class="err">fortune-teller.stack.build</span></code>. The ingress matches traffic arriving as
<code class="codehilite"><span class="c">https://fortune-teller.stack.build:443</span></code> and routes unencrypted messages to
<code>fortune-teller.stack.build</code>. The ingress matches traffic arriving as
<code>https://fortune-teller.stack.build:443</code> and routes unencrypted messages to
our kubernetes service.</li>
</ol>
<h3 id="step-4-test-the-connection">Step 4: test the connection<a class="headerlink" href="#step-4-test-the-connection" title="Permanent link"></a></h3>
<p>Once we've applied our configuration to kubernetes, it's time to test that we
can actually talk to the backend. To do this, we'll use the
<a href="https://github.com/fullstorydev/grpcurl">grpcurl</a> utility:</p>
<div class="codehilite"><pre><span></span><code>$ grpcurl fortune-teller.stack.build:443 build.stack.fortune.FortuneTeller/Predict
<div class="highlight"><pre><span></span><code>$ grpcurl fortune-teller.stack.build:443 build.stack.fortune.FortuneTeller/Predict
<span class="o">{</span>
<span class="s2">&quot;message&quot;</span>: <span class="s2">&quot;Let us endeavor so to live that when we come to die even the undertaker will be sorry.\n\t\t-- Mark Twain, \&quot;Pudd&#39;nhead Wilson&#39;s Calendar\&quot;&quot;</span>
<span class="o">}</span>
@ -1369,7 +1369,7 @@ can actually talk to the backend. To do this, we'll use the
<li>Watch the logs for the nginx-ingress-controller (increasing verbosity as
needed).</li>
<li>Double-check your address and ports.</li>
<li>Set the <code class="codehilite"><span class="err">GODEBUG=http2debug=2</span></code> environment variable to get detailed http/2
<li>Set the <code>GODEBUG=http2debug=2</code> environment variable to get detailed http/2
logging on the client and/or server.</li>
<li>Study RFC 7540 (http/2) <a href="https://tools.ietf.org/html/rfc7540">https://tools.ietf.org/html/rfc7540</a>.</li>
</ol>
@ -1381,19 +1381,16 @@ to help make it easier for your users to consume your API.</p>
</blockquote>
<h3 id="notes-on-using-responserequest-streams">Notes on using response/request streams<a class="headerlink" href="#notes-on-using-responserequest-streams" title="Permanent link"></a></h3>
<ol>
<li>If your server does only response streaming and you expect a stream to be open longer than 60 seconds, you will have to change the <code class="codehilite"><span class="err">grpc_read_timeout</span></code> to acommodate for this.</li>
<li>If your server does only response streaming and you expect a stream to be open longer than 60 seconds, you will have to change the <code>grpc_read_timeout</code> to acommodate for this.</li>
<li>If your service does only request streaming and you expect a stream to be open longer than 60 seconds, you have to change the
<code class="codehilite"><span class="err">grpc_send_timeout</span></code> and the <code class="codehilite"><span class="err">client_body_timeout</span></code>.</li>
<li>If you do both response and request streaming with an open stream longer than 60 seconds, you have to change all three timeouts: <code class="codehilite"><span class="err">grpc_read_timeout</span></code>, <code class="codehilite"><span class="err">grpc_send_timeout</span></code> and <code class="codehilite"><span class="err">client_body_timeout</span></code>.</li>
<code>grpc_send_timeout</code> and the <code>client_body_timeout</code>.</li>
<li>If you do both response and request streaming with an open stream longer than 60 seconds, you have to change all three timeouts: <code>grpc_read_timeout</code>, <code>grpc_send_timeout</code> and <code>client_body_timeout</code>.</li>
</ol>
<p>Values for the timeouts must be specified as e.g. <code class="codehilite"><span class="err">&quot;1200s&quot;</span></code>.</p>
<p>Values for the timeouts must be specified as e.g. <code>"1200s"</code>.</p>
<blockquote>
<p>On the most recent versions of nginx-ingress, changing these timeouts requires using the <code class="codehilite"><span class="err">nginx.ingress.kubernetes.io/server-snippet</span></code> annotation. There are plans for future releases to allow using the Kubernetes annotations to define each timeout seperately.</p>
<p>On the most recent versions of nginx-ingress, changing these timeouts requires using the <code>nginx.ingress.kubernetes.io/server-snippet</code> annotation. There are plans for future releases to allow using the Kubernetes annotations to define each timeout seperately.</p>
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