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Setting up ExternalDNS using AWS Cloud Map API
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Setting up ExternalDNS for Services on AWS
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Set up ExternalDNS for Azure Private DNS
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Setting up ExternalDNS for Services on Azure
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Setting up external-dns for BlueCat
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Setting up ExternalDNS for Services on Cloudflare
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Setting up External DNS with Contour
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Setting up ExternalDNS for CoreDNS with minikube
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Setting up ExternalDNS for Services on OpenStack Designate
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Setting up ExternalDNS for Services on DigitalOcean
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Setting up ExternalDNS for Services on DNSimple
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Setting up ExternalDNS for Dyn
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Setting up ExternalDNS for Exoscale
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Setting up ExternalDNS for ExternalName Services
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Setting up ExternalDNS for Services on Gandi
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Configuring ExternalDNS to use Gateway API Route Sources
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Setting up ExternalDNS on Google Kubernetes Engine
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Configuring ExternalDNS to use the Gloo Proxy Source
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Setting up ExternalDNS for Services on GoDaddy
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Setting up ExternalDNS for Services on IBMCloud
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Setting up ExternalDNS for Infoblox
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Configuring ExternalDNS to use the Istio Gateway and/or Istio Virtual Service Source
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Configuring ExternalDNS to use the Kong TCPIngress Source
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kOps dns-controller compatibility mode
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Using ExternalDNS with kube-ingress-aws-controller
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Setting up ExternalDNS for Services on Linode
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Setting up ExternalDNS on GKE with nginx-ingress-controller
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Configuring ExternalDNS to use Cluster Nodes as Source
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Creating NS record with CRD source
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Setting up ExternalDNS for Services on NS1
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Configuring ExternalDNS to use the OpenShift Route Source
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Setting up ExternalDNS for Oracle Cloud Infrastructure (OCI)
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Setting up ExternalDNS for Services on OVH
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Setting up ExternalDNS for PowerDNS
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Setting up ExternalDNS using the same domain for public and private Route53 zones
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Setting up ExternalDNS for Services on RcodeZero
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Setting up ExternalDNS for RancherDNS(RDNS) with kubernetes
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Configuring RFC2136 provider
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Setting up ExternalDNS for Services on Scaleway
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Running ExternalDNS with limited privileges
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Setting up ExternalDNS for Services on TransIP
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Setting up ExternalDNS for Services on UltraDNS
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Setting up ExternalDNS for VinylDNS
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Setting up ExternalDNS for Services on Vultr
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<h1 id="setting-up-externaldns-for-headless-services">Setting up ExternalDNS for Headless Services<a class="headerlink" href="#setting-up-externaldns-for-headless-services" title="Permanent link">&para;</a></h1>
<p>This tutorial describes how to setup ExternalDNS for usage in conjunction with a Headless service.</p>
<h2 id="use-cases">Use cases<a class="headerlink" href="#use-cases" title="Permanent link">&para;</a></h2>
<p>The main use cases that inspired this feature is the necessity for fixed addressable hostnames with services, such as Kafka when trying to access them from outside the cluster. In this scenario, quite often, only the Node IP addresses are actually routable and as in systems like Kafka more direct connections are preferable.</p>
<h2 id="setup">Setup<a class="headerlink" href="#setup" title="Permanent link">&para;</a></h2>
<p>We will go through a small example of deploying a simple Kafka with use of a headless service.</p>
<h3 id="external-dns">External DNS<a class="headerlink" href="#external-dns" title="Permanent link">&para;</a></h3>
<p>A simple deploy could look like this:</p>
<h3 id="manifest-for-clusters-without-rbac-enabled">Manifest (for clusters without RBAC enabled)<a class="headerlink" href="#manifest-for-clusters-without-rbac-enabled" title="Permanent link">&para;</a></h3>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="nt">apiVersion</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">apps/v1</span><span class="w"></span>
<a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a><span class="nt">kind</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">Deployment</span><span class="w"></span>
<a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a><span class="nt">metadata</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a><span class="nt">spec</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a><span class="w"> </span><span class="nt">strategy</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-0-7" name="__codelineno-0-7" href="#__codelineno-0-7"></a><span class="w"> </span><span class="nt">type</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">Recreate</span><span class="w"></span>
<a id="__codelineno-0-8" name="__codelineno-0-8" href="#__codelineno-0-8"></a><span class="w"> </span><span class="nt">selector</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-0-9" name="__codelineno-0-9" href="#__codelineno-0-9"></a><span class="w"> </span><span class="nt">matchLabels</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-0-10" name="__codelineno-0-10" href="#__codelineno-0-10"></a><span class="w"> </span><span class="nt">app</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-0-11" name="__codelineno-0-11" href="#__codelineno-0-11"></a><span class="w"> </span><span class="nt">template</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-0-12" name="__codelineno-0-12" href="#__codelineno-0-12"></a><span class="w"> </span><span class="nt">metadata</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-0-13" name="__codelineno-0-13" href="#__codelineno-0-13"></a><span class="w"> </span><span class="nt">labels</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-0-14" name="__codelineno-0-14" href="#__codelineno-0-14"></a><span class="w"> </span><span class="nt">app</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-0-15" name="__codelineno-0-15" href="#__codelineno-0-15"></a><span class="w"> </span><span class="nt">spec</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-0-16" name="__codelineno-0-16" href="#__codelineno-0-16"></a><span class="w"> </span><span class="nt">containers</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-0-17" name="__codelineno-0-17" href="#__codelineno-0-17"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-0-18" name="__codelineno-0-18" href="#__codelineno-0-18"></a><span class="w"> </span><span class="nt">image</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">k8s.gcr.io/external-dns/external-dns:v0.7.6</span><span class="w"></span>
<a id="__codelineno-0-19" name="__codelineno-0-19" href="#__codelineno-0-19"></a><span class="w"> </span><span class="nt">args</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-0-20" name="__codelineno-0-20" href="#__codelineno-0-20"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--log-level=debug</span><span class="w"></span>
<a id="__codelineno-0-21" name="__codelineno-0-21" href="#__codelineno-0-21"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--source=service</span><span class="w"></span>
<a id="__codelineno-0-22" name="__codelineno-0-22" href="#__codelineno-0-22"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--source=ingress</span><span class="w"></span>
<a id="__codelineno-0-23" name="__codelineno-0-23" href="#__codelineno-0-23"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--namespace=dev</span><span class="w"></span>
<a id="__codelineno-0-24" name="__codelineno-0-24" href="#__codelineno-0-24"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--domain-filter=example.org.</span><span class="w"> </span>
<a id="__codelineno-0-25" name="__codelineno-0-25" href="#__codelineno-0-25"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--provider=aws</span><span class="w"></span>
<a id="__codelineno-0-26" name="__codelineno-0-26" href="#__codelineno-0-26"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--registry=txt</span><span class="w"></span>
<a id="__codelineno-0-27" name="__codelineno-0-27" href="#__codelineno-0-27"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--txt-owner-id=dev.example.org</span><span class="w"></span>
</code></pre></div>
<h3 id="manifest-for-clusters-with-rbac-enabled">Manifest (for clusters with RBAC enabled)<a class="headerlink" href="#manifest-for-clusters-with-rbac-enabled" title="Permanent link">&para;</a></h3>
<div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="nt">apiVersion</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">v1</span><span class="w"></span>
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="nt">kind</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">ServiceAccount</span><span class="w"></span>
<a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a><span class="nt">metadata</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-1-5" name="__codelineno-1-5" href="#__codelineno-1-5"></a><span class="nn">---</span><span class="w"></span>
<a id="__codelineno-1-6" name="__codelineno-1-6" href="#__codelineno-1-6"></a><span class="nt">apiVersion</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">rbac.authorization.k8s.io/v1</span><span class="w"></span>
<a id="__codelineno-1-7" name="__codelineno-1-7" href="#__codelineno-1-7"></a><span class="nt">kind</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">ClusterRole</span><span class="w"></span>
<a id="__codelineno-1-8" name="__codelineno-1-8" href="#__codelineno-1-8"></a><span class="nt">metadata</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-9" name="__codelineno-1-9" href="#__codelineno-1-9"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-1-10" name="__codelineno-1-10" href="#__codelineno-1-10"></a><span class="nt">rules</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-11" name="__codelineno-1-11" href="#__codelineno-1-11"></a><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">apiGroups</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">&quot;&quot;</span><span class="p p-Indicator">]</span><span class="w"></span>
<a id="__codelineno-1-12" name="__codelineno-1-12" href="#__codelineno-1-12"></a><span class="w"> </span><span class="nt">resources</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">&quot;services&quot;</span><span class="p p-Indicator">,</span><span class="s">&quot;endpoints&quot;</span><span class="p p-Indicator">,</span><span class="s">&quot;pods&quot;</span><span class="p p-Indicator">]</span><span class="w"></span>
<a id="__codelineno-1-13" name="__codelineno-1-13" href="#__codelineno-1-13"></a><span class="w"> </span><span class="nt">verbs</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">&quot;get&quot;</span><span class="p p-Indicator">,</span><span class="s">&quot;watch&quot;</span><span class="p p-Indicator">,</span><span class="s">&quot;list&quot;</span><span class="p p-Indicator">]</span><span class="w"></span>
<a id="__codelineno-1-14" name="__codelineno-1-14" href="#__codelineno-1-14"></a><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">apiGroups</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">&quot;extensions&quot;</span><span class="p p-Indicator">,</span><span class="s">&quot;networking.k8s.io&quot;</span><span class="p p-Indicator">]</span><span class="w"></span>
<a id="__codelineno-1-15" name="__codelineno-1-15" href="#__codelineno-1-15"></a><span class="w"> </span><span class="nt">resources</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">&quot;ingresses&quot;</span><span class="p p-Indicator">]</span><span class="w"> </span>
<a id="__codelineno-1-16" name="__codelineno-1-16" href="#__codelineno-1-16"></a><span class="w"> </span><span class="nt">verbs</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">&quot;get&quot;</span><span class="p p-Indicator">,</span><span class="s">&quot;watch&quot;</span><span class="p p-Indicator">,</span><span class="s">&quot;list&quot;</span><span class="p p-Indicator">]</span><span class="w"></span>
<a id="__codelineno-1-17" name="__codelineno-1-17" href="#__codelineno-1-17"></a><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">apiGroups</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">&quot;&quot;</span><span class="p p-Indicator">]</span><span class="w"></span>
<a id="__codelineno-1-18" name="__codelineno-1-18" href="#__codelineno-1-18"></a><span class="w"> </span><span class="nt">resources</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">&quot;nodes&quot;</span><span class="p p-Indicator">]</span><span class="w"></span>
<a id="__codelineno-1-19" name="__codelineno-1-19" href="#__codelineno-1-19"></a><span class="w"> </span><span class="nt">verbs</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="s">&quot;list&quot;</span><span class="p p-Indicator">]</span><span class="w"></span>
<a id="__codelineno-1-20" name="__codelineno-1-20" href="#__codelineno-1-20"></a><span class="nn">---</span><span class="w"></span>
<a id="__codelineno-1-21" name="__codelineno-1-21" href="#__codelineno-1-21"></a><span class="nt">apiVersion</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">rbac.authorization.k8s.io/v1</span><span class="w"></span>
<a id="__codelineno-1-22" name="__codelineno-1-22" href="#__codelineno-1-22"></a><span class="nt">kind</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">ClusterRoleBinding</span><span class="w"></span>
<a id="__codelineno-1-23" name="__codelineno-1-23" href="#__codelineno-1-23"></a><span class="nt">metadata</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-24" name="__codelineno-1-24" href="#__codelineno-1-24"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns-viewer</span><span class="w"></span>
<a id="__codelineno-1-25" name="__codelineno-1-25" href="#__codelineno-1-25"></a><span class="nt">roleRef</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-26" name="__codelineno-1-26" href="#__codelineno-1-26"></a><span class="w"> </span><span class="nt">apiGroup</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">rbac.authorization.k8s.io</span><span class="w"></span>
<a id="__codelineno-1-27" name="__codelineno-1-27" href="#__codelineno-1-27"></a><span class="w"> </span><span class="nt">kind</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">ClusterRole</span><span class="w"></span>
<a id="__codelineno-1-28" name="__codelineno-1-28" href="#__codelineno-1-28"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-1-29" name="__codelineno-1-29" href="#__codelineno-1-29"></a><span class="nt">subjects</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-30" name="__codelineno-1-30" href="#__codelineno-1-30"></a><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">kind</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">ServiceAccount</span><span class="w"></span>
<a id="__codelineno-1-31" name="__codelineno-1-31" href="#__codelineno-1-31"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-1-32" name="__codelineno-1-32" href="#__codelineno-1-32"></a><span class="w"> </span><span class="nt">namespace</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">default</span><span class="w"></span>
<a id="__codelineno-1-33" name="__codelineno-1-33" href="#__codelineno-1-33"></a><span class="nn">---</span><span class="w"></span>
<a id="__codelineno-1-34" name="__codelineno-1-34" href="#__codelineno-1-34"></a><span class="nt">apiVersion</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">apps/v1</span><span class="w"></span>
<a id="__codelineno-1-35" name="__codelineno-1-35" href="#__codelineno-1-35"></a><span class="nt">kind</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">Deployment</span><span class="w"></span>
<a id="__codelineno-1-36" name="__codelineno-1-36" href="#__codelineno-1-36"></a><span class="nt">metadata</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-37" name="__codelineno-1-37" href="#__codelineno-1-37"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-1-38" name="__codelineno-1-38" href="#__codelineno-1-38"></a><span class="nt">spec</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-39" name="__codelineno-1-39" href="#__codelineno-1-39"></a><span class="w"> </span><span class="nt">strategy</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-40" name="__codelineno-1-40" href="#__codelineno-1-40"></a><span class="w"> </span><span class="nt">type</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">Recreate</span><span class="w"></span>
<a id="__codelineno-1-41" name="__codelineno-1-41" href="#__codelineno-1-41"></a><span class="w"> </span><span class="nt">selector</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-42" name="__codelineno-1-42" href="#__codelineno-1-42"></a><span class="w"> </span><span class="nt">matchLabels</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-43" name="__codelineno-1-43" href="#__codelineno-1-43"></a><span class="w"> </span><span class="nt">app</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-1-44" name="__codelineno-1-44" href="#__codelineno-1-44"></a><span class="w"> </span><span class="nt">template</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-45" name="__codelineno-1-45" href="#__codelineno-1-45"></a><span class="w"> </span><span class="nt">metadata</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-46" name="__codelineno-1-46" href="#__codelineno-1-46"></a><span class="w"> </span><span class="nt">labels</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-47" name="__codelineno-1-47" href="#__codelineno-1-47"></a><span class="w"> </span><span class="nt">app</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-1-48" name="__codelineno-1-48" href="#__codelineno-1-48"></a><span class="w"> </span><span class="nt">spec</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-49" name="__codelineno-1-49" href="#__codelineno-1-49"></a><span class="w"> </span><span class="nt">serviceAccountName</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-1-50" name="__codelineno-1-50" href="#__codelineno-1-50"></a><span class="w"> </span><span class="nt">containers</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-51" name="__codelineno-1-51" href="#__codelineno-1-51"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external-dns</span><span class="w"></span>
<a id="__codelineno-1-52" name="__codelineno-1-52" href="#__codelineno-1-52"></a><span class="w"> </span><span class="nt">image</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">k8s.gcr.io/external-dns/external-dns:v0.7.6</span><span class="w"></span>
<a id="__codelineno-1-53" name="__codelineno-1-53" href="#__codelineno-1-53"></a><span class="w"> </span><span class="nt">args</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-1-54" name="__codelineno-1-54" href="#__codelineno-1-54"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--log-level=debug</span><span class="w"></span>
<a id="__codelineno-1-55" name="__codelineno-1-55" href="#__codelineno-1-55"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--source=service</span><span class="w"></span>
<a id="__codelineno-1-56" name="__codelineno-1-56" href="#__codelineno-1-56"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--source=ingress</span><span class="w"></span>
<a id="__codelineno-1-57" name="__codelineno-1-57" href="#__codelineno-1-57"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--namespace=dev</span><span class="w"></span>
<a id="__codelineno-1-58" name="__codelineno-1-58" href="#__codelineno-1-58"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--domain-filter=example.org.</span><span class="w"> </span>
<a id="__codelineno-1-59" name="__codelineno-1-59" href="#__codelineno-1-59"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--provider=aws</span><span class="w"></span>
<a id="__codelineno-1-60" name="__codelineno-1-60" href="#__codelineno-1-60"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--registry=txt</span><span class="w"></span>
<a id="__codelineno-1-61" name="__codelineno-1-61" href="#__codelineno-1-61"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">--txt-owner-id=dev.example.org</span><span class="w"></span>
</code></pre></div>
<h3 id="kafka-stateful-set">Kafka Stateful Set<a class="headerlink" href="#kafka-stateful-set" title="Permanent link">&para;</a></h3>
<p>First lets deploy a Kafka Stateful set, a simple example(a lot of stuff is missing) with a headless service called <code>ksvc</code></p>
<p><div class="highlight"><pre><span></span><code><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="nt">apiVersion</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">apps/v1beta1</span><span class="w"></span>
<a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a><span class="nt">kind</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">StatefulSet</span><span class="w"></span>
<a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a><span class="nt">metadata</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">kafka</span><span class="w"></span>
<a id="__codelineno-2-5" name="__codelineno-2-5" href="#__codelineno-2-5"></a><span class="nt">spec</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-6" name="__codelineno-2-6" href="#__codelineno-2-6"></a><span class="w"> </span><span class="nt">serviceName</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">ksvc</span><span class="w"></span>
<a id="__codelineno-2-7" name="__codelineno-2-7" href="#__codelineno-2-7"></a><span class="w"> </span><span class="nt">replicas</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">3</span><span class="w"></span>
<a id="__codelineno-2-8" name="__codelineno-2-8" href="#__codelineno-2-8"></a><span class="w"> </span><span class="nt">template</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-9" name="__codelineno-2-9" href="#__codelineno-2-9"></a><span class="w"> </span><span class="nt">metadata</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-10" name="__codelineno-2-10" href="#__codelineno-2-10"></a><span class="w"> </span><span class="nt">labels</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-11" name="__codelineno-2-11" href="#__codelineno-2-11"></a><span class="w"> </span><span class="nt">component</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">kafka</span><span class="w"></span>
<a id="__codelineno-2-12" name="__codelineno-2-12" href="#__codelineno-2-12"></a><span class="w"> </span><span class="nt">spec</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-13" name="__codelineno-2-13" href="#__codelineno-2-13"></a><span class="w"> </span><span class="nt">containers</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-14" name="__codelineno-2-14" href="#__codelineno-2-14"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">kafka</span><span class="w"> </span>
<a id="__codelineno-2-15" name="__codelineno-2-15" href="#__codelineno-2-15"></a><span class="w"> </span><span class="nt">image</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">confluent/kafka</span><span class="w"></span>
<a id="__codelineno-2-16" name="__codelineno-2-16" href="#__codelineno-2-16"></a><span class="w"> </span><span class="nt">ports</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-17" name="__codelineno-2-17" href="#__codelineno-2-17"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">containerPort</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">9092</span><span class="w"></span>
<a id="__codelineno-2-18" name="__codelineno-2-18" href="#__codelineno-2-18"></a><span class="w"> </span><span class="nt">hostPort</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">9092</span><span class="w"></span>
<a id="__codelineno-2-19" name="__codelineno-2-19" href="#__codelineno-2-19"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external</span><span class="w"></span>
<a id="__codelineno-2-20" name="__codelineno-2-20" href="#__codelineno-2-20"></a><span class="w"> </span><span class="nt">command</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-21" name="__codelineno-2-21" href="#__codelineno-2-21"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">bash</span><span class="w"></span>
<a id="__codelineno-2-22" name="__codelineno-2-22" href="#__codelineno-2-22"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">-c</span><span class="w"></span>
<a id="__codelineno-2-23" name="__codelineno-2-23" href="#__codelineno-2-23"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="s">&quot;</span><span class="nv"> </span><span class="s">export</span><span class="nv"> </span><span class="s">DOMAIN=$(hostname</span><span class="nv"> </span><span class="s">-d)</span><span class="nv"> </span><span class="s">&amp;&amp;</span><span class="nv"> </span><span class="s">\</span>
<a id="__codelineno-2-24" name="__codelineno-2-24" href="#__codelineno-2-24"></a><span class="w"> </span><span class="s">export</span><span class="nv"> </span><span class="s">KAFKA_BROKER_ID=$(echo</span><span class="nv"> </span><span class="s">$HOSTNAME|rev|cut</span><span class="nv"> </span><span class="s">-d</span><span class="nv"> </span><span class="s">&#39;-&#39;</span><span class="nv"> </span><span class="s">-f</span><span class="nv"> </span><span class="s">1|rev)</span><span class="nv"> </span><span class="s">&amp;&amp;</span><span class="nv"> </span><span class="s">\</span>
<a id="__codelineno-2-25" name="__codelineno-2-25" href="#__codelineno-2-25"></a><span class="w"> </span><span class="s">export</span><span class="nv"> </span><span class="s">KAFKA_ZOOKEEPER_CONNECT=$ZK_CSVC_SERVICE_HOST:$ZK_CSVC_SERVICE_PORT</span><span class="nv"> </span><span class="s">&amp;&amp;</span><span class="nv"> </span><span class="s">\</span>
<a id="__codelineno-2-26" name="__codelineno-2-26" href="#__codelineno-2-26"></a><span class="w"> </span><span class="s">export</span><span class="nv"> </span><span class="s">KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://$HOSTNAME.example.org:9092</span><span class="nv"> </span><span class="s">&amp;&amp;</span><span class="nv"> </span><span class="s">\</span>
<a id="__codelineno-2-27" name="__codelineno-2-27" href="#__codelineno-2-27"></a><span class="w"> </span><span class="s">/etc/confluent/docker/run&quot;</span><span class="w"></span>
<a id="__codelineno-2-28" name="__codelineno-2-28" href="#__codelineno-2-28"></a><span class="w"> </span><span class="nt">volumeMounts</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-29" name="__codelineno-2-29" href="#__codelineno-2-29"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">datadir</span><span class="w"></span>
<a id="__codelineno-2-30" name="__codelineno-2-30" href="#__codelineno-2-30"></a><span class="w"> </span><span class="nt">mountPath</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">/var/lib/kafka</span><span class="w"></span>
<a id="__codelineno-2-31" name="__codelineno-2-31" href="#__codelineno-2-31"></a><span class="w"> </span><span class="nt">volumeClaimTemplates</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-32" name="__codelineno-2-32" href="#__codelineno-2-32"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">metadata</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-33" name="__codelineno-2-33" href="#__codelineno-2-33"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">datadir</span><span class="w"></span>
<a id="__codelineno-2-34" name="__codelineno-2-34" href="#__codelineno-2-34"></a><span class="w"> </span><span class="nt">annotations</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-35" name="__codelineno-2-35" href="#__codelineno-2-35"></a><span class="w"> </span><span class="nt">volume.beta.kubernetes.io/storage-class</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">st1</span><span class="w"></span>
<a id="__codelineno-2-36" name="__codelineno-2-36" href="#__codelineno-2-36"></a><span class="w"> </span><span class="nt">spec</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-37" name="__codelineno-2-37" href="#__codelineno-2-37"></a><span class="w"> </span><span class="nt">accessModes</span><span class="p">:</span><span class="w"> </span><span class="p p-Indicator">[</span><span class="w"> </span><span class="s">&quot;ReadWriteOnce&quot;</span><span class="w"> </span><span class="p p-Indicator">]</span><span class="w"></span>
<a id="__codelineno-2-38" name="__codelineno-2-38" href="#__codelineno-2-38"></a><span class="w"> </span><span class="nt">resources</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-39" name="__codelineno-2-39" href="#__codelineno-2-39"></a><span class="w"> </span><span class="nt">requests</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-2-40" name="__codelineno-2-40" href="#__codelineno-2-40"></a><span class="w"> </span><span class="nt">storage</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">500Gi</span><span class="w"></span>
</code></pre></div><br />
Very important here, is to set the <code>hostPort</code>(only works if the PodSecurityPolicy allows it)! and in case your app requires an actual hostname inside the container, unlike Kafka, which can advertise on another address, you have to set the hostname yourself.</p>
<h3 id="headless-service">Headless Service<a class="headerlink" href="#headless-service" title="Permanent link">&para;</a></h3>
<p>Now we need to define a headless service to use to expose the Kafka pods. There are generally two approaches to use expose the nodeport of a Headless service:</p>
<ol>
<li>Add <code>--fqdn-template={{name}}.example.org</code></li>
<li>Use a full annotation </li>
</ol>
<p>If you go with #1, you just need to define the headless service, here is an example of the case #2:</p>
<p><div class="highlight"><pre><span></span><code><a id="__codelineno-3-1" name="__codelineno-3-1" href="#__codelineno-3-1"></a><span class="nt">apiVersion</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">v1</span><span class="w"></span>
<a id="__codelineno-3-2" name="__codelineno-3-2" href="#__codelineno-3-2"></a><span class="nt">kind</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">Service</span><span class="w"></span>
<a id="__codelineno-3-3" name="__codelineno-3-3" href="#__codelineno-3-3"></a><span class="nt">metadata</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-3-4" name="__codelineno-3-4" href="#__codelineno-3-4"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">ksvc</span><span class="w"></span>
<a id="__codelineno-3-5" name="__codelineno-3-5" href="#__codelineno-3-5"></a><span class="w"> </span><span class="nt">annotations</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-3-6" name="__codelineno-3-6" href="#__codelineno-3-6"></a><span class="w"> </span><span class="nt">external-dns.alpha.kubernetes.io/hostname</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">example.org</span><span class="w"></span>
<a id="__codelineno-3-7" name="__codelineno-3-7" href="#__codelineno-3-7"></a><span class="nt">spec</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-3-8" name="__codelineno-3-8" href="#__codelineno-3-8"></a><span class="w"> </span><span class="nt">ports</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-3-9" name="__codelineno-3-9" href="#__codelineno-3-9"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">port</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">9092</span><span class="w"></span>
<a id="__codelineno-3-10" name="__codelineno-3-10" href="#__codelineno-3-10"></a><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">external</span><span class="w"></span>
<a id="__codelineno-3-11" name="__codelineno-3-11" href="#__codelineno-3-11"></a><span class="w"> </span><span class="nt">clusterIP</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">None</span><span class="w"></span>
<a id="__codelineno-3-12" name="__codelineno-3-12" href="#__codelineno-3-12"></a><span class="w"> </span><span class="nt">selector</span><span class="p">:</span><span class="w"></span>
<a id="__codelineno-3-13" name="__codelineno-3-13" href="#__codelineno-3-13"></a><span class="w"> </span><span class="nt">component</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">kafka</span><span class="w"></span>
</code></pre></div><br />
This will create 3 dns records:<br />
<div class="highlight"><pre><span></span><code><a id="__codelineno-4-1" name="__codelineno-4-1" href="#__codelineno-4-1"></a>kafka-0.example.org
<a id="__codelineno-4-2" name="__codelineno-4-2" href="#__codelineno-4-2"></a>kafka-1.example.org
<a id="__codelineno-4-3" name="__codelineno-4-3" href="#__codelineno-4-3"></a>kafka-2.example.org
</code></pre></div></p>
<p>If you set <code>--fqdn-template={{name}}.example.org</code> you can omit the annotation.<br />
Generally it is a better approach to use <code>--fqdn-template={{name}}.example.org</code>, because then<br />
you would get the service name inside the generated A records:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-5-1" name="__codelineno-5-1" href="#__codelineno-5-1"></a>kafka-0.ksvc.example.org
<a id="__codelineno-5-2" name="__codelineno-5-2" href="#__codelineno-5-2"></a>kafka-1.ksvc.example.org
<a id="__codelineno-5-3" name="__codelineno-5-3" href="#__codelineno-5-3"></a>kafka-2.ksvc.example.org
</code></pre></div>
<h4 id="using-pods-hostips-as-targets">Using pods&rsquo; HostIPs as targets<a class="headerlink" href="#using-pods-hostips-as-targets" title="Permanent link">&para;</a></h4>
<p>Add the following annotation to your <code>Service</code>:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-6-1" name="__codelineno-6-1" href="#__codelineno-6-1"></a><span class="nt">external-dns.alpha.kubernetes.io/endpoints-type</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">HostIP</span><span class="w"></span>
</code></pre></div>
<p>external-dns will now publish the value of the <code>.status.hostIP</code> field of the pods backing your <code>Service</code>.<br />
<div class="highlight"><pre><span></span><code><a id="__codelineno-7-1" name="__codelineno-7-1" href="#__codelineno-7-1"></a>#### Using node external IPs as targets
<a id="__codelineno-7-2" name="__codelineno-7-2" href="#__codelineno-7-2"></a>
<a id="__codelineno-7-3" name="__codelineno-7-3" href="#__codelineno-7-3"></a>Add the following annotation to your `Service`:
<a id="__codelineno-7-4" name="__codelineno-7-4" href="#__codelineno-7-4"></a>
<a id="__codelineno-7-5" name="__codelineno-7-5" href="#__codelineno-7-5"></a>```yaml
<a id="__codelineno-7-6" name="__codelineno-7-6" href="#__codelineno-7-6"></a>external-dns.alpha.kubernetes.io/endpoints-type: NodeExternalIP
</code></pre></div></p>
<p>external-dns will now publish the node external IP (<code>.status.addresses</code> entries of with <code>type: NodeExternalIP</code>) of the nodes on which the pods backing your <code>Service</code> are running.</p>
<h4 id="using-pod-annotations-to-specify-target-ips">Using pod annotations to specify target IPs<a class="headerlink" href="#using-pod-annotations-to-specify-target-ips" title="Permanent link">&para;</a></h4>
<p>Add the following annotation to the <strong>pods</strong> backing your <code>Service</code>:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-8-1" name="__codelineno-8-1" href="#__codelineno-8-1"></a><span class="nt">external-dns.alpha.kubernetes.io/target</span><span class="p">:</span><span class="w"> </span><span class="s">&quot;1.2.3.4&quot;</span><span class="w"></span>
</code></pre></div>
<p>external-dns will publish the IP specified in the annotation of each pod instead of using the podIP advertised by Kubernetes.</p>
<p>This can be useful e.g. if you are NATing public IPs onto your pod IPs and want to publish these in DNS.</p>
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