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<h1 id="configuration-snippets">Configuration Snippets<a class="headerlink" href="#configuration-snippets" title="Permanent link">¶</a></h1>
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<h2 id="ingress">Ingress<a class="headerlink" href="#ingress" title="Permanent link">¶</a></h2>
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<p>The Ingress in this example adds a custom header to Nginx configuration that only applies to that specific Ingress. If you want to add headers that apply globally to all Ingresses, please have a look at <a href="/examples/customization/custom-headers/README">this example</a>.</p>
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<div class="codehilite"><pre><span></span><span class="gp">$</span> kubectl apply -f ingress.yaml
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<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span> kubectl apply -f ingress.yaml
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</pre></div>
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</td></tr></table>
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<h2 id="test">Test<a class="headerlink" href="#test" title="Permanent link">¶</a></h2>
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<p>Check if the contents of the annotation are present in the nginx.conf file using:
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@ -1085,7 +1085,15 @@
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<h1 id="custom-configuration">Custom Configuration<a class="headerlink" href="#custom-configuration" title="Permanent link">¶</a></h1>
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<p>Using a <a href="https://kubernetes.io/docs/tasks/configure-pod-container/configure-pod-configmap/">ConfigMap</a> is possible to customize the NGINX configuration</p>
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<p>For example, if we want to change the timeouts we need to create a ConfigMap:</p>
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<div class="codehilite"><pre><span></span>$ cat configmap.yaml
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<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1
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9</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>$ cat configmap.yaml
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apiVersion: v1
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data:
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proxy-connect-timeout: <span class="s2">"10"</span>
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@ -1095,10 +1103,13 @@ kind: ConfigMap
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metadata:
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name: nginx-load-balancer-conf
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</pre></div>
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</td></tr></table>
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<div class="codehilite"><pre><span></span>curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/docs/examples/customization/custom-configuration/configmap.yaml \
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<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1
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2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/docs/examples/customization/custom-configuration/configmap.yaml \
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| kubectl apply -f -
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</pre></div>
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</td></tr></table>
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<p>If the Configmap it is updated, NGINX will be reloaded with the new configuration.</p>
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@ -1159,19 +1159,28 @@
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<p>This example demonstrates how to use a custom backend to render custom error pages.</p>
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<h2 id="customized-default-backend">Customized default backend<a class="headerlink" href="#customized-default-backend" title="Permanent link">¶</a></h2>
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<p>First, create the custom <code class="codehilite">default-backend</code>. It will be used by the Ingress controller later on.</p>
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<div class="codehilite"><pre><span></span>$ kubectl create -f custom-default-backend.yaml
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<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1
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3</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>$ kubectl create -f custom-default-backend.yaml
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service <span class="s2">"nginx-errors"</span> created
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deployment.apps <span class="s2">"nginx-errors"</span> created
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</pre></div>
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</td></tr></table>
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<p>This should have created a Deployment and a Service with the name <code class="codehilite">nginx-errors</code>.</p>
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<div class="codehilite"><pre><span></span>$ kubectl get deploy,svc
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<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1
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6</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>$ kubectl get deploy,svc
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NAME DESIRED CURRENT READY AGE
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deployment.apps/nginx-errors <span class="m">1</span> <span class="m">1</span> <span class="m">1</span> 10s
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NAME TYPE CLUSTER-IP EXTERNAL-IP PORT<span class="o">(</span>S<span class="o">)</span> AGE
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service/nginx-errors ClusterIP <span class="m">10</span>.0.0.12 <none> <span class="m">80</span>/TCP 10s
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</pre></div>
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</td></tr></table>
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<h2 id="ingress-controller-configuration">Ingress controller configuration<a class="headerlink" href="#ingress-controller-configuration" title="Permanent link">¶</a></h2>
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<p>If you do not already have an instance of the the NGINX Ingress controller running, deploy it according to the
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@ -1186,10 +1195,13 @@ service/nginx-errors ClusterIP <span class="m">10</span>.0.0.12 <none&g
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</li>
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<li>
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<p>Take note of the IP address assigned to the NGINX Ingress controller Service.
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<div class="codehilite"><pre><span></span>$ kubectl get svc ingress-nginx
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<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1
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3</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>$ kubectl get svc ingress-nginx
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NAME TYPE CLUSTER-IP EXTERNAL-IP PORT<span class="o">(</span>S<span class="o">)</span> AGE
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ingress-nginx ClusterIP <span class="m">10</span>.0.0.13 <none> <span class="m">80</span>/TCP,443/TCP 10m
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</pre></div></p>
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</pre></div>
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</td></tr></table></p>
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</li>
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</ol>
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<div class="admonition note">
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@ -1200,7 +1212,15 @@ Make sure you can use the Service to reach NGINX before proceeding with the rest
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<h2 id="testing-error-pages">Testing error pages<a class="headerlink" href="#testing-error-pages" title="Permanent link">¶</a></h2>
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<p>Let us send a couple of HTTP requests using cURL and validate everything is working as expected.</p>
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<p>A request to the default backend returns a 404 error with a custom message:</p>
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<div class="codehilite"><pre><span></span>$ curl -D- http://10.0.0.13/
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9</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>$ curl -D- http://10.0.0.13/
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HTTP/1.1 404 Not Found
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Server: nginx/1.13.12
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Date: Tue, 12 Jun 2018 19:11:24 GMT
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@ -1210,9 +1230,19 @@ Connection: keep-alive
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<span class="nt"><span></span>The page you're looking for could not be found.<span class="nt"></span></span>
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</pre></div>
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</td></tr></table>
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<p>A request with a custom <code class="codehilite">Accept</code> header returns the corresponding document type (JSON):</p>
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<div class="codehilite"><pre><span></span>$ curl -D- -H <span class="s1">'Accept: application/json'</span> http://10.0.0.13/
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10</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>$ curl -D- -H <span class="s1">'Accept: application/json'</span> http://10.0.0.13/
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HTTP/1.1 <span class="m">404</span> Not Found
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Server: nginx/1.13.12
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Date: Tue, <span class="m">12</span> Jun <span class="m">2018</span> <span class="m">19</span>:12:36 GMT
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@ -1223,6 +1253,7 @@ Vary: Accept-Encoding
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<span class="o">{</span> <span class="s2">"message"</span>: <span class="s2">"The page you're looking for could not be found"</span> <span class="o">}</span>
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</pre></div>
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</td></tr></table>
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<p>To go further with this example, feel free to deploy your own applications and Ingress objects, and validate that the
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responses are still in the correct format when a backend returns 503 (eg. if you scale a Deployment down to 0 replica).</p>
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<p>This example aims to demonstrate the deployment of an nginx ingress controller and
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use a ConfigMap to configure a custom list of headers to be passed to the upstream
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server</p>
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<div class="codehilite"><pre><span></span><span class="go">curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/docs/examples/customization/custom-headers/configmap.yaml \</span>
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<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1
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5</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="go">curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/docs/examples/customization/custom-headers/configmap.yaml \</span>
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<span class="go"> | kubectl apply -f -</span>
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<span class="go">curl https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/docs/examples/customization/custom-headers/custom-headers.yaml \</span>
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<span class="go"> | kubectl apply -f -</span>
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</pre></div>
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</td></tr></table>
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<h2 id="test">Test<a class="headerlink" href="#test" title="Permanent link">¶</a></h2>
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<p>Check the contents of the configmap is present in the nginx.conf file using:
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<h1 id="custom-upstream-server-checks">Custom Upstream server checks<a class="headerlink" href="#custom-upstream-server-checks" title="Permanent link">¶</a></h1>
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<p>This example shows how is possible to create a custom configuration for a particular upstream associated with an Ingress rule.</p>
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<div class="codehilite"><pre><span></span>echo "
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17</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>echo "
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apiVersion: extensions/v1beta1
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kind: Ingress
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metadata:
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servicePort: 80
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" | kubectl create -f -
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</pre></div>
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</td></tr></table>
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<p>Check the annotation is present in the Ingress rule:
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<div class="codehilite"><pre><span></span>kubectl get ingress http-svc -o yaml
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</pre></div></p>
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<p>Check the NGINX configuration is updated using kubectl or the status page:</p>
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<div class="codehilite"><pre><span></span>$ kubectl <span class="nb">exec</span> nginx-ingress-controller-v1ppm cat /etc/nginx/nginx.conf
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<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>kubectl get ingress http-svc -o yaml
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</pre></div>
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</td></tr></table></p>
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<p>Check the NGINX configuration is updated using kubectl or the status page:</p>
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<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1</pre></div></td><td class="code"><div class="codehilite"><pre><span></span>$ kubectl <span class="nb">exec</span> nginx-ingress-controller-v1ppm cat /etc/nginx/nginx.conf
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</pre></div>
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</td></tr></table>
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<div class="codehilite"><pre><span></span><span class="o">....</span>
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7</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="o">....</span>
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<span class="nt">upstream</span> <span class="nt">default-http-svc-x-80</span> <span class="p">{</span>
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<span class="err">least_conn</span><span class="p">;</span>
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<span class="err">server</span> <span class="err">10.2.92.2:8080</span> <span class="err">max_fails=5</span> <span class="err">fail_timeout=30</span><span class="p">;</span>
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<span class="p">}</span>
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<span class="o">....</span>
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</pre></div>
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</td></tr></table>
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@ -1097,7 +1097,25 @@ to backend service.</p>
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</ul>
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<p>You can deploy the controller as
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follows:</p>
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<div class="codehilite"><pre><span></span><span class="gp">$</span> kubectl create -f deploy/
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19</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span> kubectl create -f deploy/
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<span class="go">deployment "demo-auth-service" created</span>
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<span class="go">service "demo-auth-service" created</span>
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<span class="go">ingress "demo-auth-service" created</span>
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@ -1117,9 +1135,27 @@ follows:</p>
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<span class="go">public-demo-echo-service public-demo-echo-service.kube.local 80 1m</span>
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<span class="go">secure-demo-echo-service secure-demo-echo-service.kube.local 80 1m</span>
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</pre></div>
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</td></tr></table>
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<p>Test 1: public service with no auth header</p>
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<div class="codehilite"><pre><span></span><span class="gp">$</span> curl -H <span class="s1">'Host: public-demo-echo-service.kube.local'</span> -v <span class="m">192</span>.168.99.100
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18</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span> curl -H <span class="s1">'Host: public-demo-echo-service.kube.local'</span> -v <span class="m">192</span>.168.99.100
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<span class="go">* Rebuilt URL to: 192.168.99.100/</span>
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<span class="go">* Trying 192.168.99.100...</span>
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<span class="go">* Connected to 192.168.99.100 (192.168.99.100) port 80 (#0)</span>
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@ -1138,9 +1174,33 @@ follows:</p>
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<span class="go">* Connection #0 to host 192.168.99.100 left intact</span>
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<span class="go">UserID: , UserRole:</span>
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</pre></div>
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</td></tr></table>
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<p>Test 2: secure service with no auth header</p>
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<div class="codehilite"><pre><span></span><span class="gp">$</span> curl -H <span class="s1">'Host: secure-demo-echo-service.kube.local'</span> -v <span class="m">192</span>.168.99.100
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24</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span> curl -H <span class="s1">'Host: secure-demo-echo-service.kube.local'</span> -v <span class="m">192</span>.168.99.100
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<span class="go">* Rebuilt URL to: 192.168.99.100/</span>
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<span class="go">* Trying 192.168.99.100...</span>
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<span class="go">* Connected to 192.168.99.100 (192.168.99.100) port 80 (#0)</span>
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@ -1165,9 +1225,28 @@ follows:</p>
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<span class="go"></html></span>
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<span class="go">* Connection #0 to host 192.168.99.100 left intact</span>
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</pre></div>
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</td></tr></table>
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<p>Test 3: public service with valid auth header</p>
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<div class="codehilite"><pre><span></span><span class="gp">$</span> curl -H <span class="s1">'Host: public-demo-echo-service.kube.local'</span> -H <span class="s1">'User:internal'</span> -v <span class="m">192</span>.168.99.100
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19</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span> curl -H <span class="s1">'Host: public-demo-echo-service.kube.local'</span> -H <span class="s1">'User:internal'</span> -v <span class="m">192</span>.168.99.100
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<span class="go">* Rebuilt URL to: 192.168.99.100/</span>
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<span class="go">* Trying 192.168.99.100...</span>
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<span class="go">* Connected to 192.168.99.100 (192.168.99.100) port 80 (#0)</span>
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@ -1187,9 +1266,28 @@ follows:</p>
|
|||
<span class="go">* Connection #0 to host 192.168.99.100 left intact</span>
|
||||
<span class="go">UserID: 1443635317331776148, UserRole: admin</span>
|
||||
</pre></div>
|
||||
</td></tr></table>
|
||||
|
||||
<p>Test 4: public service with valid auth header</p>
|
||||
<div class="codehilite"><pre><span></span><span class="gp">$</span> curl -H <span class="s1">'Host: secure-demo-echo-service.kube.local'</span> -H <span class="s1">'User:internal'</span> -v <span class="m">192</span>.168.99.100
|
||||
<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span> 1
|
||||
2
|
||||
3
|
||||
4
|
||||
5
|
||||
6
|
||||
7
|
||||
8
|
||||
9
|
||||
10
|
||||
11
|
||||
12
|
||||
13
|
||||
14
|
||||
15
|
||||
16
|
||||
17
|
||||
18
|
||||
19</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span> curl -H <span class="s1">'Host: secure-demo-echo-service.kube.local'</span> -H <span class="s1">'User:internal'</span> -v <span class="m">192</span>.168.99.100
|
||||
<span class="go">* Rebuilt URL to: 192.168.99.100/</span>
|
||||
<span class="go">* Trying 192.168.99.100...</span>
|
||||
<span class="go">* Connected to 192.168.99.100 (192.168.99.100) port 80 (#0)</span>
|
||||
|
|
@ -1209,6 +1307,7 @@ follows:</p>
|
|||
<span class="go">* Connection #0 to host 192.168.99.100 left intact</span>
|
||||
<span class="go">UserID: 605394647632969758, UserRole: admin</span>
|
||||
</pre></div>
|
||||
</td></tr></table>
|
||||
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -1160,7 +1160,17 @@
|
|||
use a ConfigMap to configure custom Diffie-Hellman parameters file to help with
|
||||
"Perfect Forward Secrecy".</p>
|
||||
<h2 id="custom-configuration">Custom configuration<a class="headerlink" href="#custom-configuration" title="Permanent link">¶</a></h2>
|
||||
<div class="codehilite"><pre><span></span><span class="gp">$</span> cat configmap.yaml
|
||||
<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span> 1
|
||||
2
|
||||
3
|
||||
4
|
||||
5
|
||||
6
|
||||
7
|
||||
8
|
||||
9
|
||||
10
|
||||
11</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span> cat configmap.yaml
|
||||
<span class="go">apiVersion: v1</span>
|
||||
<span class="go">data:</span>
|
||||
<span class="go"> ssl-dh-param: "ingress-nginx/lb-dhparam"</span>
|
||||
|
|
@ -1172,16 +1182,30 @@ use a ConfigMap to configure custom Diffie-Hellman parameters file to help with
|
|||
<span class="go"> app.kubernetes.io/name: ingress-nginx</span>
|
||||
<span class="go"> app.kubernetes.io/part-of: ingress-nginx</span>
|
||||
</pre></div>
|
||||
</td></tr></table>
|
||||
|
||||
<div class="codehilite"><pre><span></span><span class="gp">$</span> kubectl create -f configmap.yaml
|
||||
<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span> kubectl create -f configmap.yaml
|
||||
</pre></div>
|
||||
</td></tr></table>
|
||||
|
||||
<h2 id="custom-dh-parameters-secret">Custom DH parameters secret<a class="headerlink" href="#custom-dh-parameters-secret" title="Permanent link">¶</a></h2>
|
||||
<div class="codehilite"><pre><span></span><span class="gp">$</span>> openssl dhparam <span class="m">1024</span> <span class="m">2</span>> /dev/null <span class="p">|</span> base64
|
||||
<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1
|
||||
2</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span>> openssl dhparam <span class="m">1024</span> <span class="m">2</span>> /dev/null <span class="p">|</span> base64
|
||||
<span class="go">LS0tLS1CRUdJTiBESCBQQVJBTUVURVJ...</span>
|
||||
</pre></div>
|
||||
</td></tr></table>
|
||||
|
||||
<div class="codehilite"><pre><span></span><span class="gp">$</span> cat ssl-dh-param.yaml
|
||||
<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span> 1
|
||||
2
|
||||
3
|
||||
4
|
||||
5
|
||||
6
|
||||
7
|
||||
8
|
||||
9
|
||||
10
|
||||
11</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span> cat ssl-dh-param.yaml
|
||||
<span class="go">apiVersion: v1</span>
|
||||
<span class="go">data:</span>
|
||||
<span class="go"> dhparam.pem: "LS0tLS1CRUdJTiBESCBQQVJBTUVURVJ..."</span>
|
||||
|
|
@ -1193,9 +1217,11 @@ use a ConfigMap to configure custom Diffie-Hellman parameters file to help with
|
|||
<span class="go"> app.kubernetes.io/name: ingress-nginx</span>
|
||||
<span class="go"> app.kubernetes.io/part-of: ingress-nginx</span>
|
||||
</pre></div>
|
||||
</td></tr></table>
|
||||
|
||||
<div class="codehilite"><pre><span></span><span class="gp">$</span> kubectl create -f ssl-dh-param.yaml
|
||||
<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="gp">$</span> kubectl create -f ssl-dh-param.yaml
|
||||
</pre></div>
|
||||
</td></tr></table>
|
||||
|
||||
<h2 id="test">Test<a class="headerlink" href="#test" title="Permanent link">¶</a></h2>
|
||||
<p>Check the contents of the configmap is present in the nginx.conf file using:
|
||||
|
|
|
|||
|
|
@ -1085,8 +1085,9 @@
|
|||
<h1 id="sysctl-tuning">Sysctl tuning<a class="headerlink" href="#sysctl-tuning" title="Permanent link">¶</a></h1>
|
||||
<p>This example aims to demonstrate the use of an Init Container to adjust sysctl default values
|
||||
using <code class="codehilite">kubectl patch</code></p>
|
||||
<div class="codehilite"><pre><span></span><span class="go">kubectl patch deployment -n ingress-nginx nginx-ingress-controller --patch="$(cat patch.json)"</span>
|
||||
<table class="codehilitetable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span>1</pre></div></td><td class="code"><div class="codehilite"><pre><span></span><span class="go">kubectl patch deployment -n ingress-nginx nginx-ingress-controller --patch="$(cat patch.json)"</span>
|
||||
</pre></div>
|
||||
</td></tr></table>
|
||||
|
||||
|
||||
|
||||
|
|
|
|||
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